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Constructing long-cycling crystalline C_(3)N_(4)-based carbonaceous anodes for sodium-ion battery via N configuration control 被引量:2
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作者 Ying Wang Hongguan Li +5 位作者 Shuanlong Di Boyin Zhai Ping Niu Antonios Kelarakis Shulan Wang Li Li 《Carbon Energy》 SCIE EI CAS CSCD 2024年第1期159-171,共13页
Carbon nitrides with two-dimensional layered structures and high theoretical capacities are attractive as anode materials for sodium-ion batteries while their low crystallinity and insufficient structural stability st... Carbon nitrides with two-dimensional layered structures and high theoretical capacities are attractive as anode materials for sodium-ion batteries while their low crystallinity and insufficient structural stability strongly restrict their practical applications.Coupling carbon nitrides with conductive carbon may relieve these issues.However,little is known about the influence of nitrogen(N)configurations on the interactions between carbon and C_(3)N_(4),which is fundamentally critical for guiding the precise design of advanced C_(3)N_(4)-related electrodes.Herein,highly crystalline C_(3)N_(4)(poly(triazine imide),PTI)based all-carbon composites were developed by molten salt strategy.More importantly,the vital role of pyrrolic-N for enhancing charge transfer and boosting Na+storage of C_(3)N_(4)-based composites,which was confirmed by both theoretical and experimental evidence,was spot-highlighted for the first time.By elaborately controlling the salt composition,the composite with high pyrrolic-N and minimized graphitic-N content was obtained.Profiting from the formation of highly crystalline PTI and electrochemically favorable pyrrolic-N configurations,the composite delivered an unusual reverse growth and record-level cycling stability even after 5000 cycles along with high reversible capacity and outstanding full-cell capacity retention.This work broadens the energy storage applications of C_(3)N_(4) and provides new prospects for the design of advanced all-carbon electrodes. 展开更多
关键词 ANODE highly crystalline C_(3)N_(4) N configuration sodium-ion batteries ultra-long cyclic stability
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Biodegradation of Crystalline Chitin:A Review of Recent Advancement,Challenges,and Future Study Directions
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作者 SONG Jianlin SU Haipeng +1 位作者 SUN Jianan MAO Xiangzhao 《Journal of Ocean University of China》 SCIE CAS CSCD 2024年第5期1319-1328,共10页
Chitin is the second most abundant renewable polysaccharide on Earth.The degradation of chitin into soluble and bioactive N-acetyl chitooligosaccharides(NCOSs)and N-acetyl-D-glucosamine(GlcNAc)has emerged as a pivotal... Chitin is the second most abundant renewable polysaccharide on Earth.The degradation of chitin into soluble and bioactive N-acetyl chitooligosaccharides(NCOSs)and N-acetyl-D-glucosamine(GlcNAc)has emerged as a pivotal step in the efficient and sustainable utilization of chitin resources.However,because of its dense structure,high crystallinity,and poor solubility,chitin typically needs pretreatment via chemical,physical,and other methods before enzymatic conversion to enhance the accessibility between substrates and enzyme molecules.Consequently,there has been considerable interest in exploring the direct biological degradation of crystalline chitin as a cost-effective and environment-friendly technology.This review endeavors to present several biological methods for the direct degradation of chitin.We primarily focused on the importance of chitinase containing chitin-binding domain(CBD).Additionally,various modification strategies for increasing the degradation efficiency of crystalline chitin were introduced.Subsequently,the review systematically elucidated critical components of multi-enzyme catalytic systems,highlighting their potential for chitin degradation.Furthermore,the application of microorganisms in the degradation of crystalline chitin was also discussed.The insights in this review contribute to the explorations and investigations of enzymatic and microbial approaches for the direct degradation of crystalline chitin,thereby fostering advancements in biomass conversion. 展开更多
关键词 crystalline chitin CHITINASE biological degradation engineering MICROORGANISMS
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Tuning the crystallinity of titanium nitride on copper-embedded carbon nanofiber interlayers for accelerated electrochemical kinetics in lithium-sulfur batteries
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作者 Yinyu Xiang Liqiang Lu +4 位作者 Feng Yan Debarun Sengupta Petra Rudolf Ajay Giri Prakash Kottapalli Yutao Pei 《Carbon Energy》 SCIE EI CAS CSCD 2024年第6期40-55,共16页
The development of lithium-sulfur(Li-S)batteries is hindered by the disadvantages of shuttling of polysulfides and the sluggish redox kinetics of the conversion of sulfur species during discharge and charge.Herein,the... The development of lithium-sulfur(Li-S)batteries is hindered by the disadvantages of shuttling of polysulfides and the sluggish redox kinetics of the conversion of sulfur species during discharge and charge.Herein,the crystallinities of a titanium nitride(TiN)film on copper-embedded carbon nanofibers(Cu-CNFs)are regulated and the nanofibers are used as interlayers to resolve the aforementioned crucial issues.A low-crystalline TiN-coated Cu-CNF(L-TiN-Cu-CNF)interlayer is compared with its highly crystalline counterpart(H-TiN-Cu-CNFs).It is demonstrated that the L-TiN coating not only strengthens the chemical adsorption toward polysulfides but also greatly accelerates the electrochemical conversion of polysulfides.Due to robust carbon frameworks and enhanced kinetics,impressive highrate performance at 2 C(913 mAh g^(-1)based on sulfur)as well as remarkable cyclic stability up to 300 cycles(626 mAh g^(-1))with capacity retention of 46.5%is realized for L-TiN-Cu-CNF interlayer-configured Li-S batteries.Even under high loading(3.8 mg cm^(-2))of sulfur and relatively lean electrolyte(10μL electrolyte per milligram sulfur)conditions,the Li-S battery equipped with L-TiN-Cu-CNF interlayers delivers a high capacity of 1144 mAh g^(-1)with cathodic capacity of 4.25 mAh cm^(-2)at 0.1 C,providing a potential pathway toward the design of multifunctional interlayers for highly efficient Li-S batteries. 展开更多
关键词 crystallinITY electrochemical kinetics INTERLAYER lithium-sulfur batteries titanium nitride
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Synthesis of crystalline g-C_(3)N_(4) with rock/molten salts for efficient photocatalysis and piezocatalysis
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作者 Tingting Xu Jung Hur +4 位作者 Ping Niu Shulan Wang Sangwook Lee Sang-Eun Chun Li Li 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第5期890-898,共9页
Graphitic carbon nitride(g-C_(3)N_(4))is emerging as a promising visible-light photocatalyst while the low crystallinity with sluggish charge separation/migration dynamics significantly restricts its practical applicat... Graphitic carbon nitride(g-C_(3)N_(4))is emerging as a promising visible-light photocatalyst while the low crystallinity with sluggish charge separation/migration dynamics significantly restricts its practical applications.Currently,synthesizing highly crystalline g-C_(3)N_(4) with sufficient surface activities still remains challenging.Herein,different from using alkali molten salts which is commonly reported,we propose an approach for synthesis of highly crystalline g-C_(3)N_(4) with FeCl3/KCl rock/molten mixed salts.The rock salt can serve as the structure-directing template while molten salt provides the required liquid medium for re-condensation.Intriguingly,the synthesized photocatalyst showed further enhanced crystallinity and improved surface area along with high p/p*excitation compared with crystalline C_(3)N_(4) prepared from conventional molten-salt methods.These catalytically advantageous features lead to its superior photocatalytic and piezocatalytic activities with a high reactivity for overall water splitting that is not commonly reported for C_(3)N_(4).This work provides an effective strategy for structural optimization of organic semiconductor based materials and may inspire new ideas for the design of advanced photocatalysts. 展开更多
关键词 High crystallinity Carbon nitride PHOTOCATALYSIS Piezocatalysis Overall water splitting
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Crystallinity-defect matching relationship of g-C_(3)N_(4): Experimental and theoretical perspectives
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作者 Yuhan Li Ziteng Ren +5 位作者 Zhengjiang He Ping Ouyang Youyu Duan Wendong Zhang Kangle Lv Fan Dong 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第4期623-658,共36页
Good crystallinity can reduce the charge recombination centers caused by defects,whilst structures with strong polycondensation have high charge mobility,leading to more charge transfer to the material surface for rea... Good crystallinity can reduce the charge recombination centers caused by defects,whilst structures with strong polycondensation have high charge mobility,leading to more charge transfer to the material surface for reaction.Much effort has been put into the preparation of a highly efficient g-C_(3)N_(4) with defects to improve its application potential under the premise in high crystallinity.Hence,this review paper emphasizes the importance to balance the defect and crystallinity of g-C_(3)N_(4).In addition,detailed discussion on the relationship between defects and activity of g-C_(3)N_(4) was carried out based on its applications in environmental purification(e.g.,VOCs oxidation,NO_(x) oxidation,H_(2)O_(2) evolution,sterilization,pesticide oxidation)and energy conversion(H_(2) evolution,N_(2) fixation and CO_(2) reduction).Lastly,the challenge in developing more efficient defective g-C_(3)N_(4) photocatalytic materials is summarized. 展开更多
关键词 PHOTOCATALYSIS DEFECT G-C_(3)N_(4) crystallinITY APPLICATION
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Effect of high-energy Ne ions irradiation on mechanical properties difference between Zr_(63.5)Cu_(23)Al_(9)Fe_(4.5)metallic glass and crystalline W
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作者 李娜 张立松 +3 位作者 张小楠 宫丽悦 羌建兵 梅显秀 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第6期14-21,共8页
In this paper,high-energy Ne ions were used to irradiate Zr_(63.5)Cu_(23)Al_(9)Fe_(4.5) metallic glass(MG)and crystalline W to investigate their difference in mechanical response after irradiation.The results showed t... In this paper,high-energy Ne ions were used to irradiate Zr_(63.5)Cu_(23)Al_(9)Fe_(4.5) metallic glass(MG)and crystalline W to investigate their difference in mechanical response after irradiation.The results showed that with the irradiation dose increased,the tensile micro-strain increased,nano-hardness increased from 7.11 GPa to 7.90 GPa and 8.62 GPa,Young’s modulus increased,and H3/E2 increased which indicating that the plastic deformability decreased in crystalline W.Under the same irradiation conditions,the Zr_(63.5)Cu_(23)Al_(9)Fe_(4.5) MG still maintained the amorphous structure and became more disordered despite the longer range and stronger displacement damage of Ne ions in Zr_(63.5)Cu_(23)Al_(9)Fe_(4.5) MG than in crystalline W.Unlike the irradiation hardening and embrittlement behavior of crystalline W,Zr_(63.5)Cu_(23)Al_(9)Fe_(4.5) MG showed the gradual decrease in hardness from 6.02 GPa to 5.89 GPa and 5.50 GPa,the decrease in modulus and the increase in plastic deformability with the increasing dose.Possibly,the irradiation softening and toughening phenomenon of Zr_(63.5)Cu_(23)Al_(9)Fe_(4.5) MG could provide new ideas for the design of nuclear materials. 展开更多
关键词 heavy ions irradiation displacement damage metallic glass crystalline W mechanical property
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Shock-induced energy localization and reaction growth considering chemical-inclusions effects for crystalline explosives
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作者 Ruqin Liu Yanqing Wu +3 位作者 Xinjie Wang Fenglei Huang Xiaona Huang Yushi Wen 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第3期278-294,共17页
Chemical inclusions significantly alter shock responses of crystalline explosives in macroscale gap experiments but their microscale dynamics origin remains unclear.Herein shock-induced energy localization,overall phy... Chemical inclusions significantly alter shock responses of crystalline explosives in macroscale gap experiments but their microscale dynamics origin remains unclear.Herein shock-induced energy localization,overall physical responses,and reactions in a-1,3,5-trinitro-1,3,5-triazinane(a-RDX)crystal entrained various chemical inclusions were investigated by the multi-scale shock technique implemented in the reactive molecular dynamics method.Results indicated that energy localization and shock reaction were affected by the intrinsic factors within chemical inclusions,i.e.,phase states,chemical compositions,and concentrations.The atomic origin of chemical-inclusions effects on energy localization is dependent on the dynamics mechanism of interfacial molecules with free space volume,which includes homogeneous intermolecular compression,interfacial impact and shear,and void collapse and jet.As introducing various chemical inclusions,the initiation of those dynamics mechanisms triggers diverse decay rates of bulk RDX molecules and hereby impacts on growth speeds of final reactions.Adding chemical inclusions can reduce the effectiveness of the void during the shock impacting.Under the shockwave velocity of 9 km/s,the parent RDX decay rate in RDX entrained amorphous carbon decreases the most and is about one fourth of that in RDX with a vacuum void,and solid HMX and TATB inclusions are more reactive than amorphous carbon but less reactive than dry air or acetone inclusions.The lessdense shocking system denotes the greater increases in local temperature and stress,the faster energy liberation,and the earlier final reaction into equilibrium,revealing more pronounced responses to the present intense shockwave.The quantitative models associated with the relative system density(RD_(sys))were proposed for indicating energy-localization mechanisms and evaluating initiation safety in the shocked crystalline explosive.RD_(sys)is defined by the density ratio of defective RDX to perfect crystal after dynamics relaxation and reveals the global density characteristic in shocked systems filled with chemical inclusions.When RD_(sys)is below 0.9,local hydrodynamic jet initiated by void collapse dominates upon energy localization instead of interfacial impact.This study sheds light on novel insights for understanding the shock chemistry and physical-based atomic origin in crystalline explosives considering chemical-inclusions effects. 展开更多
关键词 Shock responses Energy localization crystalline explosives Chemical inclusions Reactive molecular dynamics
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Strength criterion for crystalline rocks considering grain size effect and tensile-compressive strength ratio
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作者 ZHANG Cheng-han JI Hong-guang +3 位作者 JIANG Peng YOU Shuang GENG Qian-cheng JIAO Chen-jiang 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第7期2365-2378,共14页
The macroscopic mechanical properties of rocks are significantly influenced by their microstructure.As a material bonded by mineral grains,the grain morphology of crystalline rock is the primary factor influencing the... The macroscopic mechanical properties of rocks are significantly influenced by their microstructure.As a material bonded by mineral grains,the grain morphology of crystalline rock is the primary factor influencing the strength.However,most strength criteria neglect the strength variations caused by different grain characteristics in rocks.Furthermore,the traditional linear criteria tend to overestimate tensile strength and exhibit apex singularity.To address these shortcomings,a piecewise strength criterion that considers the grain size effect has been proposed.A part of an ellipse was employed to construct the envelope of the tensive-shear region on the meridian plane,to accurately reproduce the low tensile-compressive strength ratio.Based on the analysis of experimental data,both linear and exponential modification functions that account for grain size effects were integrated into the proposed criterion.The corresponding finite element algorithm has been implemented.The accuracy and applicability of the proposed criterion were validated by comparing with the experimental data. 展开更多
关键词 crystalline rock grain size effect strength criterion tensile-compressive strength ratio finite element algorithm
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Laser-Constructing 3D Copper Current Collector with Crystalline Orientation Selectivity for Stable Lithium Metal Batteries
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作者 Hui Li Gang Wang +3 位作者 Jin Hu Jun Li Jiaxu Huang Shaolin Xu 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第6期129-139,共11页
The practical application of lithium(Li)metal anodes in high-capacity batteries is impeded by the formation of hazardous Li dendrites.To address this challenge,this research presents a novel methodology that combines ... The practical application of lithium(Li)metal anodes in high-capacity batteries is impeded by the formation of hazardous Li dendrites.To address this challenge,this research presents a novel methodology that combines laser ablation and heat treatment to precisely induce controlled grain growth within laser-structured grooves on copper(Cu)current collectors.Specifically,this approach enhances the prevalence of Cu(100)facets within the grooves,effectively lowering the overpotential for Li nucleation and promoting preferential Li deposition.Unlike approaches that modify the entire surface of collectors,our work focuses on selectively enhancing lithiophilicity within the grooves to mitigate the formation of Li dendrites and exhibit exceptional performance metrics.The half-cell with these collectors maintains a remarkable Coulombic efficiency of 97.42%over 350 cycles at 1 mA cm^(−2).The symmetric cell can cycle stably for 1600 h at 0.5 mA cm^(−2).Furthermore,when integrated with LiFePO4 cathodes,the full-cell configuration demonstrates outstanding capacity retention of 92.39%after 400 cycles at a 1C discharge rate.This study introduces a novel technique for fabricating selective lithiophilic three-dimensional(3D)Cu current collectors,thereby enhancing the performance of Li metal batteries.The insights gained from this approach hold promise for enhancing the performance of all laser-processed 3D Cu current collectors by enabling precise lithiophilic modifications within complex structures. 展开更多
关键词 copper current collector heat treatment laser processing lithium metal battery selective crystalline orientation
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Isolation of Microcrystalline Cellulose from Wood and Fabrication of Polylactic Acid(PLA)Based Green Biocomposites
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作者 Selwin Maria Sekar Rajini Nagarajan +5 位作者 Ponsuriyaprakash Selvakumar Ismail Sikiru Oluwarotimi Kumar Krishnan Faruq Mohammad Mohammed Rafi Shaik Nadir Ayrilmis 《Journal of Renewable Materials》 EI CAS 2024年第8期1455-1474,共20页
An innovative microcrystalline cellulose(MCC)natural fibre powder-reinforced PLA biocomposite was investigated using the hand lay-up technique.The polymer matrix composite(PMC)samples were prepared by varying the weig... An innovative microcrystalline cellulose(MCC)natural fibre powder-reinforced PLA biocomposite was investigated using the hand lay-up technique.The polymer matrix composite(PMC)samples were prepared by varying the weight percentages(wt.%)of both PLA matrix and MCC reinforcement:pure PLA/100:0,90:10,80:20,70:30,60:40 and 50:50 wt.%,respectively.From the results obtained,MCC powder,with its impressive aspect ratio,proved to be an ideal reinforcement for the PLA,exhibiting exceptional mechanical properties.It was evident that the 80:20 wt.%biocomposite sample exhibited the maximum improvement in the tensile,flexural,notched impact,compressive strength and hardness by 28.85%,20.00%,91.66%,21.53%and 35.82%,respectively compared to the pure PLA sample.Similarly,during the thermogravimetric analysis(TGA),the same 80:20 wt.%biocomposite sample showed a minimum weight loss of 20%at 400℃,among others.The morphological study using Field Emission Scanning Electron Microscopy(FE-SEM)revealed that the uniform distribution of cellulose reinforcement in the PLA matrix actively improved the mechanical properties of the biocomposites,especially the optimal 80:20 wt.%sample.Importantly,it was evident that the optimal PLA/cellulose biocomposite sample could be a suitable and alternative sustainable,environmentally friendly and biodegradable material for semi/structural applications,replacing synthetic and traditional components. 展开更多
关键词 Polylactic acid micro crystalline cellulose BIOCOMPOSITE CHARACTERIZATIONS FESEM environmental pollution
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Three-dimensional topological crystalline insulator without spin-orbit coupling in nonsymmorphic photonic metacrystal
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作者 Zhide Yu Lingbo Xia 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第10期282-286,共5页
By including certain point group symmetry in the classification of band topology,Fu proposed a class of threedimensionaltopological crystalline insulators(TCIs)without spin-orbit coupling in 2011.In Fu’s model,surfac... By including certain point group symmetry in the classification of band topology,Fu proposed a class of threedimensionaltopological crystalline insulators(TCIs)without spin-orbit coupling in 2011.In Fu’s model,surface states(ifpresent)doubly degenerate atГandM when time-reversal and C_(4) symmetries are preserved.The analogs of Fu’s modelwith surface states quadratically degenerate atM are widely studied,while surface states with quadratic degeneracy atГare rarely reported.In this study,we propose a three-dimensional TCI without spin-orbit coupling in a judiciously designednonsymmorphic photonic metacrystal.The surface states of photonic TCIs exhibit quadratic band degeneracy in the(001)surface Brillouin zone(BZ)center(Гpoint).The gapless surface states and their quadratic dispersion are protected by C4and time-reversal symmetries,which correspond to the nontrivial band topology characterized by Z_(2)topological invariant.Moreover,the surface states along lines fromГto the(001)surface BZ boundary exhibit zigzag feature,which is interpretedfrom symmetry perspective by building composite operators constructed by the product of glide symmetries with timereversalsymmetry.The metacrystal array surrounded with air possesses high order hinge states with electric fields highlylocalized at the hinge that may apply to optical sensors.The gapless surface states and hinge states reside in a cleanfrequency bandgap.The topological surface states emerge at the boundary of the metacrystal and perfect electric conductor(PEC),which provide a pathway for topologically manipulating light propagation in photonic devices. 展开更多
关键词 topological crystalline insulator nonsymmorphic photonic metacrystal
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Organic Compounds Possessing the Plastic Crystalline Phase: Calculation of Their Fusion Enthalpies
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作者 Mikhail Yu. Gorbachev Natalia N. Gorinchoy 《International Journal of Organic Chemistry》 2024年第3期93-106,共14页
For the first time, for different organic and inorganic compounds possessing the plastic crystalline phase, a new semiempirical equation describing dependence of their fusion enthalpies on such physico-chemical quanti... For the first time, for different organic and inorganic compounds possessing the plastic crystalline phase, a new semiempirical equation describing dependence of their fusion enthalpies on such physico-chemical quantities as normal melting temperature, surface tension, molar volume and critical molar volume is received on the base of the principle of corresponding states and the energy equipartition theorem. Moreover, the proposed equation allows one to take into account the particularities of one-particle molecular rotation in the plastic crystalline phase. 展开更多
关键词 Fusion Enthalpies Calculation Organic Compounds Inorganic Compounds Plastic crystalline Phases
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Preparation and Performance Study of Cementitious Capillary Crystalline Waterproof Materials
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作者 Hui Li Yu Liu Gaoshang Zhang 《Journal of Architectural Research and Development》 2024年第3期42-52,共11页
Cementitious capillary crystalline waterproof materials(CCCW for short)offer durability and excellent waterproofing properties,making them a popular option for building waterproofing.Some scholars have studied the pro... Cementitious capillary crystalline waterproof materials(CCCW for short)offer durability and excellent waterproofing properties,making them a popular option for building waterproofing.Some scholars have studied the proportioning of such materials.However,these studies lack the relationship between the impermeability pressure of mortar and the components,and the mechanism of action is somewhat debatable.Therefore,we adopted a two-step method in our experiments.Firstly,we screened out the components that significantly impact impermeability from a variety of active components by orthogonal test.We then optimized the design of the active group ratio using the simplex lattice method.Lastly,we conducted a performance test of the optimal ratio and explored the waterproofing mechanism of homemade CCCW. 展开更多
关键词 Cementitious penetration crystalline waterproof material IMPERMEABILITY Mechanism analysis Optimization design
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Review of all-inorganic perovskites and their tandem solar cells with crystalline silicon
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作者 Hongjun Wu Zhaorui Sun +5 位作者 Haonan Li Xiuhua Chen Wenhui Ma Shaoyuan Li Zhengjie Chen Fengshuo Xi 《Energy Materials and Devices》 2024年第3期51-80,共30页
In widely studied organic-inorganic hybrid perovskites,the organic component tends to volatilize and decompose under high temperatures,oxygen,and humidity,which adversely affects the performance and longevity of the a... In widely studied organic-inorganic hybrid perovskites,the organic component tends to volatilize and decompose under high temperatures,oxygen,and humidity,which adversely affects the performance and longevity of the associated solar cells.In contrast,all-inorganic perovskites demonstrate superior stability under these conditions and offer photoelectric properties comparable to those of their hybrid counterparts.The potential of tandem solar cells(TSCs)made from all-inorganic perovskites is especially promising.This review is the first to address recent advancements in TSCs that use all-inorganic perovskites and crystalline silicon(c-Si),both domestically and internationally.This work provides a systematic and thorough analysis of the current challenges faced by these systems and proposes rational solutions.Additionally,we elucidate the regulatory mechanisms of all-inorganic perovskites and their TSCs when combined with c-Si,summarizing the corresponding patterns.Finally,we outline future research directions for all-inorganic perovskites and their TSCs with c-Si.This work offers valuable insights and references for the continued advancement of perovskitebased TSCs. 展开更多
关键词 all-inorganic perovskites single-junction solar cells perovskite/crystalline silicon tandem solar cells
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α-B crystallin在乳腺浸润性导管癌中的表达及意义 被引量:4
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作者 房爱菊 孟斌 +3 位作者 刘文君 王妍 高永生 张庆慧 《山东大学学报(医学版)》 CAS 北大核心 2008年第3期280-283,F0002,共5页
目的检测α-B crystallin在乳腺癌中的表达,并探讨其在乳腺癌中表达的意义。方法应用组织芯片及免疫组织化学法对180例乳腺浸润性导管癌、17例导管原位癌及20例正常乳腺组织中α-B crystallin以及雌激素受体(ER)、孕激素受体(PR)、HER2... 目的检测α-B crystallin在乳腺癌中的表达,并探讨其在乳腺癌中表达的意义。方法应用组织芯片及免疫组织化学法对180例乳腺浸润性导管癌、17例导管原位癌及20例正常乳腺组织中α-B crystallin以及雌激素受体(ER)、孕激素受体(PR)、HER2和Ki67的表达进行检测;根据最近提出的乳腺癌分子分型进行分组,对α-B crystallin在不同分组中的表达及与其他临床病理特征的关系行统计学分析。结果①α-Bcrystallin在乳腺导管原位癌的阳性率为41.17%(7/17),浸润性导管癌的阳性率为67.22%(121/180),两组间差异有统计学意义(P<0.05);②在浸润性导管癌中,α-B crystallin在淋巴结转移组阳性率为83.33%(81/96),无转移组阳性率为48.81%(41/84),两组间差异具有统计学意义(P<0.01,r=0.368 8);③在分子分型各组中α-B crystallin的表达差异具有统计学意义(P<0.05);其中LuminalA组与HER2+组及三阴性组两两比较差异具有统计学意义(P<0.05)。结论α-B crys-tallin在乳腺浸润性导管癌中的表达明显高于导管原位癌,与淋巴结转移呈正相关,且在生物学行为更为恶性的HER2+组和三阴性组具有更高的表达水平,提示α-B crystallin蛋白可能参与了乳腺癌的浸润与转移过程。 展开更多
关键词 乳腺肿瘤 α-B crystallin蛋白 组织芯片
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原发性肺腺癌alpha-B-crystallin、TTF-1、NapsinA表达研究 被引量:12
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作者 沈维敏 许佳毅 唐曦 《临床和实验医学杂志》 2016年第18期1800-1803,共4页
目的分析alpha-B-crystallin、甲状腺转录因子1(TTF-1)、Napsin A在原发性肺腺癌中的表达及意义,为今后该病临床诊断及治疗提供参考。方法收集原发性肺腺癌患者80例作为观察组,将鳞癌、腺癌、腺鳞癌、大细胞癌(共50例)归为对照组;使用... 目的分析alpha-B-crystallin、甲状腺转录因子1(TTF-1)、Napsin A在原发性肺腺癌中的表达及意义,为今后该病临床诊断及治疗提供参考。方法收集原发性肺腺癌患者80例作为观察组,将鳞癌、腺癌、腺鳞癌、大细胞癌(共50例)归为对照组;使用免疫组化检测alpha-B-crystallin、TTF-1、Napsin A,分析三指标与原发性肺腺癌病例类型、分期、预后等相关性。结果 alpha-B-crystallin、TTF-1、Napsin A在观察组(肺腺癌)中阳性率分别为20.00%、81.25%、88.75%,与对照组有显著差异(P<0.05);Napsin A、TTF-1、alpha-B-crystallin实性为主阳性率分别为54.20%、65.03%、0;alpha-B-crystallin阳性率在不同肿瘤大小、分期、预后中有显著差异;Napsin A阳性率在不同肿瘤大小、分期、组织分化、淋巴结转移、预后中有显著差异;TTF-1阳性率在不同肿瘤大小、组织分化、分期、预后中有显著差异(P均<0.05)。结论 1TTF-1、Napsin A阳性表达能明确区分原发性肺腺癌、鳞癌、大细胞癌和腺鳞癌,可辅助临床肺癌鉴别;2TTF-1、Napsin A在原发性肺腺癌中有高阳性率,用于肺腺上皮肿瘤病理诊断能提高肺腺癌诊断准确性;3alpha-B-crystallin、TTF-1、Napsin A阳性表达均与肺腺癌病例分期、肿瘤大小、预后相关,对该病预后判断有辅助作用。 展开更多
关键词 原发性肺腺癌 ALPHA-B-crystallin TTF-1 NapsinA
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Effect of Crystalline Structure of Wood on Liquefaction 被引量:1
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作者 程发 朱森 +4 位作者 魏玉萍 王东华 周维义 蒋龙平 张镜吾 《Transactions of Tianjin University》 EI CAS 2002年第2期87-92,共6页
By means of X ray and gas chromatography analysis, the crystalline structure of untreated wood , alkali treated wood and benzylated wood and their liquefaction in toluene and tetrahydrofufan with HCl as a catalyst we... By means of X ray and gas chromatography analysis, the crystalline structure of untreated wood , alkali treated wood and benzylated wood and their liquefaction in toluene and tetrahydrofufan with HCl as a catalyst were studied .The upper solution of benzylated wood was also studied by GC MS analysis. It proved that the introduction of bulky benzyl group in wood significantly changed the crystalline structure of wood ,enlarging the free volume which facilitated the penetration of solvent into the matrix of treated wood, thus tremendously enhancing thesolubility in solvent,compared to untreated wood and alkali treated wood. The percentage of residue decreased and the combined solvent increased with the increase of weight gain revealed that the liquefaction process became easy. Furthermore, the factors that influenced the liquefaction of benzylated wood were investigated. It showed that the liquefaction performance was improved with the increase of liquefaction time and the amount of catalyst when toluene was used as a solvent, especially in the presence of THF as solvent, there existed the optimum liquefaction time and the amount of catalyst . 展开更多
关键词 WOOD alkali treated wood benzylated wood LIQUEFACTION crystalline structure
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αB-crystallin在口腔疣状癌中的表达及其抗凋亡机制的初步研究 被引量:2
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作者 全宏志 唐瞻贵 +3 位作者 赵丽莉 姚志刚 王柏盛 谢尚 《上海口腔医学》 CAS CSCD 北大核心 2012年第4期432-436,共5页
目的:探讨αB-crystallin在口腔疣状癌中的表达及其抗细胞凋亡的可能机制。方法:采用免疫组织化学技术,检测αB-crystallin、活化型caspase-3在口腔疣状癌、口腔鳞癌、正常口腔黏膜的表达,并对两者的相关性进行分析。所有数据均由SPSS1... 目的:探讨αB-crystallin在口腔疣状癌中的表达及其抗细胞凋亡的可能机制。方法:采用免疫组织化学技术,检测αB-crystallin、活化型caspase-3在口腔疣状癌、口腔鳞癌、正常口腔黏膜的表达,并对两者的相关性进行分析。所有数据均由SPSS16.0软件包进行处理,不同组间差别采用Mann-Whitney U、Kruskal-Wallis检验;相关性分析采用Spearman等级相关分析。结果:αB-crystallin在口腔疣状癌、口腔鳞癌的表达显著高于正常口腔黏膜(P<0.05),口腔疣状癌中αB-crystallin表达的增高伴随着活化型caspase-3表达的下降(P<0.05)。结论:αB-crystallin可能通过抑制caspase-3的活化发挥抗凋亡作用,并可能在口腔疣状癌的发生、发展中发挥一定作用。 展开更多
关键词 口腔疣状癌 αB-crystallin Activatedcaspase-3 凋亡
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Alpha B-crystallin基因在结肠癌组织中的表达及其意义 被引量:1
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作者 杭晓声 汪道远 +1 位作者 王卫理 李莉华 《肿瘤防治研究》 CAS CSCD 北大核心 2009年第2期140-143,共4页
目的探讨alpha B-crystallin基因在结肠癌组织中的表达及其与结肠癌临床病理的相关性。方法采用RT-PCR方法检测64例结肠癌组织及其癌旁正常组织中alpha B-crystallin基因的表达,计算其阳性率;并用Western blot方法检测结肠癌组织及其癌... 目的探讨alpha B-crystallin基因在结肠癌组织中的表达及其与结肠癌临床病理的相关性。方法采用RT-PCR方法检测64例结肠癌组织及其癌旁正常组织中alpha B-crystallin基因的表达,计算其阳性率;并用Western blot方法检测结肠癌组织及其癌旁正常组织中alpha B-crystallin蛋白的表达变化。结果alpha B-crystallin mRNA在结肠癌组织中表达的阳性率明显高于癌旁正常组织(P<0.01),在发生浆膜外转移者的表达阳性率明显高于浆膜内者(P<0.05),在较大肿瘤者中的表达阳性率明显高于较小肿瘤者,在有淋巴结转移者中的表达阳性率明显高于无淋巴结转移者(P<0.05),但与患者的性别、年龄、肿瘤的分化程度无关(P>0.05)。alpha B-crystallin蛋白在结肠癌组织中表达明显高于癌旁正常组织(P<0.01)。结论alpha B-crystallin基因的高表达可能与结肠癌的发生及侵袭转移有关。 展开更多
关键词 ALPHA B-crystallin 结肠癌 RT-PCR WESTERN BLOT
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The effect of initial discharge conditions on the properties of microcrystalline silicon thin films and solar cells 被引量:1
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作者 陈永生 杨仕娥 +3 位作者 汪建华 卢景霄 郜小勇 谷锦华 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第5期505-510,共6页
This paper studies the effects of silane back diffusion in the initial plasma ignition stage on the properties of microcrystalline silicon (μc-Si:H) films by Raman spectroscopy and spectroscopic ellipsometry, thro... This paper studies the effects of silane back diffusion in the initial plasma ignition stage on the properties of microcrystalline silicon (μc-Si:H) films by Raman spectroscopy and spectroscopic ellipsometry, through delaying the injection of SiH4 gas to the reactor before plasma ignition. Compared with standard discharge condition, delayed SiH4 gas condition could prevent the back diffusion of Sill4 from the reactor to the deposition region effectively, which induced the formation of a thick amorphous incubation layer in the interface between bulk film and glass substrate. Applying this method, it obtains the improvement of spectral response in the middle and long wavelength region by combining this method with solar cell fabrication. Finally, results are explained by modifying zero-order analytical model, and a good agreement is found between the model and experiments concerning the optimum delayed injection time. 展开更多
关键词 back diffusion microcrystalline silicon thin film Raman crystallinity
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