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绿色施工技术在建筑工程中的应用研究 被引量:3
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作者 常孔善 《科技资讯》 2023年第22期104-107,共4页
建筑工程对各类施工技术的要求较多,需要各地重视技术研究、应用,保证工程质量和建设效益,客观推动了绿色施工技术发展、应用。以常见绿色施工技术为切入点,予以简述,在此基础上分析其在建筑工程中的应用优势和不足,最后探究建筑工程中... 建筑工程对各类施工技术的要求较多,需要各地重视技术研究、应用,保证工程质量和建设效益,客观推动了绿色施工技术发展、应用。以常见绿色施工技术为切入点,予以简述,在此基础上分析其在建筑工程中的应用优势和不足,最后探究建筑工程中应用绿色施工技术的建议,就强调技术广泛应用、丰富技术应用类别给出硬性应用要求,提升应用深入性四项措施进行分析,以求进一步发挥绿色施工技术作用,提升建筑工程综合效益。 展开更多
关键词 绿色施工技术 建筑工程 材料复用 环保效益
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Development,modeling and application of piezoelectric fiber composites 被引量:14
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作者 林秀娟 周科朝 +1 位作者 张晓泳 张斗 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第1期98-107,共10页
Piezoelectric materials are capable of actuation and sensing and have been used in a wide variety of smart devices and structures.Active fiber composite and macro fiber composite are newly developed types of piezoelec... Piezoelectric materials are capable of actuation and sensing and have been used in a wide variety of smart devices and structures.Active fiber composite and macro fiber composite are newly developed types of piezoelectric composites,and show superior properties to monolithic piezoelectric wafer due to their distinctive structures.Numerous work has focused on the performance prediction of the composites by evaluation of structural parameters and properties of the constituent materials with analytical and numerical methods.Various applications have been explored for the piezoelectric fiber composites,including vibration and noise control,health monitoring,morphing of structures and energy harvesting,in which the composites play key role and demonstrate the necessity for further development. 展开更多
关键词 PIEZOELECTRIC active fiber composite macro fiber composite MODELING smart applications
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Deep purification of As(V)in drinking water by silica gel loaded with FeOOH and MnO_(2) 被引量:1
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作者 SHI Tong-shan JIANG Feng +2 位作者 WANG Pan YUE Tong SUN Wei 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第6期1692-1706,共15页
For deep purification of As(V)from drinking water by adsorption,two adsorbents S-FeOOH and S-MnO_(2) were successfully synthesized by loading FeOOH and MnO_(2) nanoparticles onto silica gel in situ.Characterization of... For deep purification of As(V)from drinking water by adsorption,two adsorbents S-FeOOH and S-MnO_(2) were successfully synthesized by loading FeOOH and MnO_(2) nanoparticles onto silica gel in situ.Characterization of the adsorbents implied that S-FeOOH and S-MnO_(2) with large particle size(diameter of 150−250μm)still had high specific surface areas(357.0 and 334.6 m^(2)/g)due to their specific amorphous and porous structure.In batch experiments,the influences of pH,contact time,adsorbent dosage,and temperature on the adsorption were investigated.Comparing with other adsorbents reported,the synthesized adsorbents in this study,especially S-FeOOH,showed good performance for As(V)removal in a wide pH(2−12)and temperature(25−65℃)range.The residual As(V)concentration after S-FeOOH treatment was around 0.01 mg/L,which met the drinking water standard.The adsorption process followed the pseudo-second-order kinetic model,and the adsorption equilibrium was reached within 5 min.The equilibrium adsorption data of S-FeOOH can be well fitted by the Langmuir isotherm,while that of S-MnO_(2) followed Freundlich model,which indicated their different adsorption mechanisms.The results show that S-FeOOH is superior to S-MnO_(2) in eliminating As(V),and S-FeOOH could be used as a promising adsorbent for the deep purification of As(V)in drinking water. 展开更多
关键词 As(V)removal adsorption drinking water composite material
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Single-step synthesis of magnetic chitosan composites and application for chromate(Cr(Ⅵ))removal 被引量:5
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作者 杨卫春 唐琼芝 +2 位作者 董舒宇 柴立元 王海鹰 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第2期317-323,共7页
Magnetic chitosan composites(Fe3O4@chitosan) were synthesized in one single-step, characterized and applied in Cr(VI) removal from water. With the increase of loading proportion of chitosan, Cr(Ⅵ) adsorption capacity... Magnetic chitosan composites(Fe3O4@chitosan) were synthesized in one single-step, characterized and applied in Cr(VI) removal from water. With the increase of loading proportion of chitosan, Cr(Ⅵ) adsorption capacity of Fe3O4@chitosan composites increased from 10.771 to 21.040 mg/g. The optimum adsorption capacities of Cr(VI) on Fe3O4@chitosan-3 were found in a pH range of 3.0-5.0. Kinetic study results show that the adsorption process follows pseudo-second-order model, indicating that the rate-limiting step in the adsorption of Cr(Ⅵ) involves chemisorptions. Moreover, FT-IR spectra analysis confirms that the amine and hydroxyl groups of chitosan are predominantly responsible for binding. Results from this work demonstrate that the prepared Fe3O4@chitosan composites possess great potential in Cr(Ⅵ) removal from contaminated water. 展开更多
关键词 Cr(VI) magnetic chitosan one single-step synthesis ADSORPTION
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Analysis of the Power System from an Electron Beam Accelerator and the Correlation with the Theoretical Dosimetry for Radiation Processing
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作者 Samir Luiz Somessari Elizabeth S. Ribeiro Somessari Carlos Gaia da Silveira Wilson Aparecido Parejo Calvo 《Journal of Physical Science and Application》 2015年第5期356-366,共11页
Dynamitron DC1500/25/04 type EBA (Electron beam accelerator), model JOB 188, was manufactured by IBA Industrial (Radiation Dynamics, Inc.) and installed at IPEN-CNEN/SP, in 1978. The technical specifications of th... Dynamitron DC1500/25/04 type EBA (Electron beam accelerator), model JOB 188, was manufactured by IBA Industrial (Radiation Dynamics, Inc.) and installed at IPEN-CNEN/SP, in 1978. The technical specifications of the EBA are: energy 0.5 to 1.5 MeV; beam current: 0.3 to 25.0 mA; beam scanning: 60 to 120 cm; beam width: 25.4 mm and frequency: 100 Hz. Nowadays, this accelerator has been used for innumerable applications, such as: For sterilization of medical, pharmaceutical and biological products, treatment of industrial and domestic effluents and sludge, preservation and disinfestations of foods and agricultural products. Other important application are lignocellulosic material irradiation as a pre-treatment to produce ethanol bio-fuel, decontamination of pesticide packing, solid residues remediation, organic compounds removal from wastewater, treatment of effluent from petroleum production units, crosslinking of foams, wires and electric cables. Electron accelerator JOB 188 is, also, very important composite and nanocomposite materials and carbon fibers irradiation, irradiated grafting ion-exchange membranes for fuel cells application, natural polymers and multilayer packages irradiation and biodegradable blends production. The energy of the electron beam is calculated as a function of the current in the accelerator high-voltage divisor, taking into account the thickness and density of the material to be irradiated. This energy is calculated considering the electron through the entire material and the distance from the titanium foil window, so that the absorbed doses at the points of entrance and exit are equivalent on the material. The dose is directly proportional to the beam current and the exposure time of the material under the electron beam and inversely proportional to the scan width. The aim of this paper is to analyze the power system parameters of the EBA Dynamitron DC 1500/25/04, such as, voltage and RMS (Root-mean-square) current in the oscillator system, high voltage generator and waveform. For this purpose software developed in the Radiation Technology Center at IPEN/CNEN-SP to simulate the energy efficiency of this industrial accelerator. Finally, it is also targeted to compare theoretical dosimetry using parameters of energy and beam current with data from the accelerator power system. This knowledge and technology will be very useful and essential for the control system upgrade of EBA, mainly Dynamitron DC 1500/25/04 taking into consideration that radiation processing technology for industrial and environmental applications has been developed and used worldwide. 展开更多
关键词 Electron beam accelerator industrial dosimetry radiation processing accelerator power system Dynamitron DC 1500/25/04 accelerator.
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Influence of Al addition on microstructures of Cu-B alloys and Cu-ZrB2 composites
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作者 Hai-min DING Wen-zhi MIAO +5 位作者 Xiao-wei HUANG Qing LIU Xiao-liang FAN Hui-qiang WANG Kai-yu CHU Chun-yan LI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第5期1335-1346,共12页
The influence of Al addition on the microstructure of Cu-B alloys and Cu-ZrB2 composites was investigated using scanning electron microscopy, X-ray diffraction and first-principles calculation. The results show that t... The influence of Al addition on the microstructure of Cu-B alloys and Cu-ZrB2 composites was investigated using scanning electron microscopy, X-ray diffraction and first-principles calculation. The results show that the eutectic B in Cu-B alloys can be modified by Al from coarse needles to fine fibrous structure and primary B will form in hypoeutectic Cu-B alloys. As for Cu-ZrB2 composites, Al can significantly refine and modify the morphology of ZrB2 as well as improve its distribution, which should be due to its selective adsorption on ZrB2 surfaces. The first-principles calculation results indicate that Al is preferentially adsobed on ZrB2■, then on ZrB2■, and finally on ZrB2(0001). As a result, smaller sized ZrB2 with a polyhedron-like, even nearly sphere-like morphology, can form. Due to Al addition, the hardness of Cu-ZrB2 composites is greatly enhanced, but the electrical conductivity of the composites is seriously reduced. 展开更多
关键词 Cu-B alloys Cu matrix composites modification effect MICROSTRUCTURES
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Application of Biomaterials in Cardiac Repair and Regeneration 被引量:2
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作者 Zhi Cui Baofeng Yang Ren-Ke Li 《Engineering》 SCIE EI 2016年第1期141-148,共8页
Cardiovascular disease is a leading cause of death throughout the world. The demand for new thera- peutic interventions is increasing. Although pharmacological and surgical interventions dramatically improve the quali... Cardiovascular disease is a leading cause of death throughout the world. The demand for new thera- peutic interventions is increasing. Although pharmacological and surgical interventions dramatically improve the quality of life of cardiovascular disease patients, cheaper and less invasive approaches are always preferable. Biomaterials, both natural and synthetic, exhibit great potential in cardiac repair and regeneration, either as a carrier for drug delivery or as an extracellular matrix substitute scaffold. In this review, we discuss the current treatment options for several cardiovascular diseases, as well as types of biomaterials that have been investigated as potential therapeutic interventions for said diseases. We especially highlight investigations into the possible use of conductive polymers for correcting ischemic heart disease-induced conduction abnormalities, and the generation of biological pacemakers to im- orove the conduction oathwav in heart block. 展开更多
关键词 Myocardial infarction Heart regeneration Biomaterial Tissue engineeringStem cell
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Synthesis and Application of a Zeolite-containing Composite Material Made from Spent FCC Catalyst 被引量:2
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作者 Zheng Shuqin He Lijun +3 位作者 Yao Hua Ren Shao Yu Hongxia Zhang Jiance 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2015年第4期46-54,共9页
Novel composite material with a wide pore distribution was synthesized by an in situ technique using spent FCC catalyst as raw material. The characterization results indicated that the composite material contained 56.... Novel composite material with a wide pore distribution was synthesized by an in situ technique using spent FCC catalyst as raw material. The characterization results indicated that the composite material contained 56.7% of zeolite Y and exhibited a much larger specific surface area and pore volume as well as strong hydrothermal stability. Fluid catalytic cracking(FCC) catalyst was prepared based on the composite material. The results indicated that the as-prepared catalyst possessed a unique pore structure that was advantageous to the diffusion-controlled reactions. In addition, the attrition resistance, activity and hydrothermal stability of the studied catalyst were superior to those of the reference catalyst. The catalyst also exhibited excellent nickel and vanadium passivation performance, strong bottoms upgrading selectivity, and better gasoline and coke selectivity. In comparison to the reference catalyst, the yields of the gasoline and light oil increased by 1.61 and 1.31 percentage points, respectively, and the coke yield decreased by 0.22 percentage points, and the olefin content in the produced gasoline reduced by 2.51 percentage points, with the research octane number increased by 0.7 unit. 展开更多
关键词 FCC spent catalyst composite material porous structure resid catalyst catalytic properties
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Preparation, Properties and Application of Polymeric Organic-Inorganic Nanocomposites
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作者 任杰 刘艳 唐小真 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2003年第3期326-333,共8页
Six preparation methods for polymeric organic-inorganic nanocomposites and their respective mechanisms and features are reviewed. The extraordinary properties of polymeric organic-inorganic nanocomposites are discusse... Six preparation methods for polymeric organic-inorganic nanocomposites and their respective mechanisms and features are reviewed. The extraordinary properties of polymeric organic-inorganic nanocomposites are discussed,and their potential applications are evaluated. 展开更多
关键词 NANOCOMPOSITES SOL-GEL INTERCALATION in-situ polymerization molecular self-assembling radiation polymerization
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Solution combustion synthesis of Fe-Ni-Y_2O_3 nanocomposites for magnetic application
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作者 刘烨 秦明礼 +4 位作者 章林 贾宝瑞 陈鹏起 张德志 曲选辉 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第1期23-29,共7页
Fe-Ni-Y2O3 nanocomposites with uniform distribution of fine oxide particles in the gamma Fe Ni matrix were successfully fabricated via solution combustion followed by hydrogen reduction. The morphological characterist... Fe-Ni-Y2O3 nanocomposites with uniform distribution of fine oxide particles in the gamma Fe Ni matrix were successfully fabricated via solution combustion followed by hydrogen reduction. The morphological characteristics and phase transformation of the combusted powder and the Fe-Ni-Y2O3 nanocomposites were characterized by XRD, FESEM and TEM.Porous Fe-Ni-Y2O3 nanocomposites with crystallite size below 100 nm were obtained after reduction. The morphology, phases and magnetic property of Fe-Ni-Y2O3 nanocomposites reduced at different temperatures were investigated. The Fe-Ni-Y2O3 nanocomposite reduced at 900 °C has the maximum saturation magnetization and the minimum coercivity values of 167.41 A/(m2·kg)and 3.11 k A/m, respectively. 展开更多
关键词 nanocomposite powder solution combustion synthesis soft magnetic materials magnetic properties
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Effective Utilization of Coal Fly Ash in Building Material Production
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作者 Jozef Junak Nadezda Stevulova 《Journal of Chemistry and Chemical Engineering》 2011年第8期724-728,共5页
This paper is aimed at verifying utilization possibilities of alkaline modified coal fly ash as cement replacement in the concrete. The influence of alkaline activated coal fly ash originating from Slovakian power pla... This paper is aimed at verifying utilization possibilities of alkaline modified coal fly ash as cement replacement in the concrete. The influence of alkaline activated coal fly ash originating from Slovakian power plant in Novsky (Si/Al = 3,1) as a partial cement replacement in concrete on compressive strength of hardened composites after 28 and 90 days was investigated. Alkaline activation of coal fly ash was realized in an autoclave at 130 ℃ and pressure of 160 kPa during 5 hours and in a reactor under normal conditions (equal temperature during 36 hours) at solid/liquid ratio of 0.5. Coal fly ash/cement mixtures were prepared with 25 % cement replacement by starting and modified coal fly ash and given in forms. Compressive strengths of composites after 28 and 90 days of hardening were compared to referential composite without coal fly ash and evaluated according to the standard of STN EN 450 by the value of relative strength KR (compressive strength of coal fly ash/cement composite to compressive strength of comparative concrete). The final compressive strengths of hardened composites based on alkaline activated coal fly ash reached values in the range of 6 up to 50 MPa. In the set of experimental composites based on alkaline activated coal fly ashes, the highest value of relative strength after 28- and 90- days of hardening reached composite with cement replacement by coal fly ash zeolitized in autoclave (105% of compressive strength of referential sample), what is connected with formation of zeolitic phases on surface of coal fly ash particles. The achieved results confirm that alkaline activation of coal fly ash in an autoclave under observed conditions can be successfully used as a partial cement replacement in concrete of C20/25 and C25/30 in accordance with requirements of standards (STN EN 450 and STN EN 206). 展开更多
关键词 coal fly ash chemical activation CONCRETE compressive strength ZEOLITE
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Berry Phase of Composite System Induced by Time-Dependent Interaction
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作者 杨林广 邵彬 邹健 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第4期631-634,共4页
The Berry phase in a composite system induced by the time-dependent interaction is discussed. We choose two coupled spin-1/2 systems as the composite system: one of the subsystems is subjected to a static magnetic fi... The Berry phase in a composite system induced by the time-dependent interaction is discussed. We choose two coupled spin-1/2 systems as the composite system: one of the subsystems is subjected to a static magnetic field, and the coupling parameters between two spins are controllable in time. We show that the time-dependent interaction can induce the Berry phase in a similar way as that a spin-1/2 system (qubit) is driven by an effective time-dependent magnetic field. Furthermore, using two consecutive cycles with opposite directions of both the static magnetic field as well as opposite signs of the coupling parameters, a nontrivial two-qubit unitary transformation purely based on Berry phases can be constructed. 展开更多
关键词 Berry phase time-dependent interaction Dzyaloshinskii-Moriya interaction
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Feasibility of developing composite action between concrete and cold-formed steel beam
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作者 S.O.Bamaga M.Md.Tahir +6 位作者 T.C.Tan S.Mohammad N.Yahya A.L.Saleh M.Mustaffar M.H.Osman A.B.A.Rahman 《Journal of Central South University》 SCIE EI CAS 2013年第12期3689-3696,共8页
Cold-formed steel structures are steel structure products constructed from sheets or coils using cold rolling, press brake or bending brake method. These structures are extensively employed in building construction in... Cold-formed steel structures are steel structure products constructed from sheets or coils using cold rolling, press brake or bending brake method. These structures are extensively employed in building construction industry due to their light mass, ductility by economic cold forming operations, favorable strength-to-mass ratio and other factors. The utilization of cold formed steel sections with concrete as composite can hugely reduce the construction cost. However, the use of cold formed steel members in composite concrete beams has been very limited. A comprehensive review of developments in composite beam with cold formed steel sections was introduced. It was revealed that employing cold-formed steel channel section to replace reinforcement bars in conventional reinforced concrete beam results in a significant cost reduction without reducing strength capacity. The use of composite beam consisting of cold-formed steel open or close box and filled concrete could also reduce construction cost. Lighter composite girder for bridges with cold-formed steel of U section was introduced. Moreover, types of shear connectors to provide composite action between cold-formed steel beam and concrete slab were presented. However, further studies to investigate the effects of metal decking on the behavior of composite beam with cold-formed steel section and introduction of ductile shear connectors were recommended. 展开更多
关键词 cold formed steel BEAM composite shear connection thin-wall composite girder
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Synthesis and Characterization of Aluminum/Carbon Nanotubes Composites: Study of Interfacial Interaction
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作者 Mananna Barbeno Pasquale Barone +3 位作者 Valentino Pingitore Assunta Bonanno Mariano Davoli FangXu 《Journal of Chemistry and Chemical Engineering》 2013年第4期313-318,共6页
Abstract: In this work, the authors present a study of growth and characterization of composite based on AI and CNT (carbon nanotubes. The composites were prepared by a chemical mixing method and characterized by SE... Abstract: In this work, the authors present a study of growth and characterization of composite based on AI and CNT (carbon nanotubes. The composites were prepared by a chemical mixing method and characterized by SEM analysis, energy dispersed X-ray measurements, X-ray photoelectron spectroscopy and cathodoluminescence spectroscopy. The analysis showed that the composites are formed by macro-cluster of aluminum oxide on a network of CNT without formation of chemical bonds at interface between particles. The results are compared with those obtained for a sample of CNT with AI traces (〈 0.5%). They show that only the presence of metal traces changes the nanotubes optical properties, with a luminescence signal centered at about 380 nm. These luminescence signals are caused by the adhesion between CNT and AI micro-clusters that promote the formation of band gap with some local energy levels. 展开更多
关键词 Carbon nanotubes ALUMINUM interface structure metal-CNT composite.
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Self-assembled Carbon Nanotube/Silicone Composite Films and Their Electrical Properties for Electrical Device
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作者 Sook Young Moon 《Journal of Physical Science and Application》 2016年第2期29-33,共5页
Novel composites were synthesized using AEPTES (3-(2-aminoethylamino)propyltriethoxysilane), which behaves as an excellent dispersant for MWCNTs (multiwall carbon nanotubes) in polymer film matrices. The thickne... Novel composites were synthesized using AEPTES (3-(2-aminoethylamino)propyltriethoxysilane), which behaves as an excellent dispersant for MWCNTs (multiwall carbon nanotubes) in polymer film matrices. The thickness of the synthesized nanocomposite films ranged from 50 to 70 lam, having well-dispersed MWCNTs. Increasing the AEPTES concentration from 0.0196 to 0.0300 M, increased the amine content and the dispersion of MWCNTs. The film synthesized at 0.0300 M AETPES exhibited the greatest degree of dispersion among the three samples, which is consistent with a self-assembled silane group interacting with the MWCNT surface. 展开更多
关键词 Carbon nanotube SELF-ASSEMBLY AEPTES NANOCOMPOSITE electrical properties.
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Synthesis, Characterization, and Catalytic Application of Highly Ordered Mesoporous Alumina-Carbon Nanocomposites 被引量:5
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作者 Jinming Xu Aiqin Wang +2 位作者 Xiaodong Wang Dangsheng Su Tao Zhang 《Nano Research》 SCIE EI CAS CSCD 2011年第1期50-60,共11页
Highly ordered mesoporous carbon-alumina nanocomposites (OMCA) have been synthesized for the first time by a multi-component co-assembly method followed by pyrolysis at high temperatures. In this synthesis, resol ph... Highly ordered mesoporous carbon-alumina nanocomposites (OMCA) have been synthesized for the first time by a multi-component co-assembly method followed by pyrolysis at high temperatures. In this synthesis, resol phenol-formaldehyde resin (PF resin) and alumina sol were respectively used as the carbon and alumina precursors and triblock copolymer Pluronic F127 as the template. N2-adsorption measurements, X-ray diffraction, and transmission electron microscopy revealed that, with an increase of the alumina content in the nanocomposite from 11 to 48 wt.%, the pore size increased from 2.9 to 5.0 nm while the ordered mesoporous structure was retained. Further increasing the alumina content to 53 wt.% resulted in wormhole-like structures, although the pore size distribution was still narrow. The nanocomposite walls are composed of continuous carbon and amorphous alumina, which allows the ordered mesostructure to be well preserved even after the removal of alumina by HF etching or the removal of carbon by calcination in air. The OMCA nanocomposites exhibited good thermostability below 1000℃; at higher temperatures the ordered mesostructure partially collapsed, associated with a phase transformation from amorphous alumina into γ-Al2O3. OMCA-supported Pt catalysts exhibited excellent performance in the one-pot transformation of cellulose into hexitols thanks to the unique surface properties of the nanocomposite. 展开更多
关键词 NANOCOMPOSITE MESOPOROUS ALUMINA carbon CELLULOSE
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Enhanced photoelectric conversion efficiency of dye-sensitized solar cells by the synergetic effect of NaYF_4:Er^(3+)/Yb^(3+) and g-C_3N_4 被引量:3
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作者 于鸣琦 曲阳 +2 位作者 潘凯 王国凤 李亚栋 《Science China Materials》 SCIE EI CSCD 2017年第3期228-238,共11页
TiO2-NaYF4:Er^3+/Yb^3+-C3N4 composite photoanodes were successfully designed for the first time. The photoelectric conversion efficiency of TiO2-NaYF4:Er^3+/Yb^3+ C3N4 composite cell can result an efficiency of ... TiO2-NaYF4:Er^3+/Yb^3+-C3N4 composite photoanodes were successfully designed for the first time. The photoelectric conversion efficiency of TiO2-NaYF4:Er^3+/Yb^3+ C3N4 composite cell can result an efficiency of 7.37%, which is higher than those of pure TiO2 cell and TiO2-C3N4 composite cell. The enhancement of the efficiency can be attributed to the synergetic effect of NaYF4:Er^3+/Yb^3+ and C3N4. Elec- trochemical impedance spectroscopy analysis revealed that the interfacial resistance of the TiO2-dyelI3^-/I^- electrolyte interface of TiO2-NaYF4:Er^3+/Yb^3+-C3N4 composites cell was much smaller than that of pure TiO2 cell. In addition, the TiO2-NaYF4:Er^3+/Yb^3+-C3N4 composite cell had longer electron recombination time and shorter electron transport time than that of pure TiO2 cell. 展开更多
关键词 NaYF4:Er^3+/Yb^3+-C3N4 synergetic effect LUMINESCENCE dye-sensitized solar cells.
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Template-directed fabrication of 3D graphene-based composite and their electrochemical energy-related applications 被引量:8
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作者 Hua-Jun Qiu Li Liu Yu Wang 《Science Bulletin》 SCIE EI CAS CSCD 2016年第6期443-450,共8页
Graphene shows great potentials in electrochemical energy-related areas.To enhance its properties and corresponding electrochemical performance,recently,three-dimensional(3D)graphene-based materials especially monolit... Graphene shows great potentials in electrochemical energy-related areas.To enhance its properties and corresponding electrochemical performance,recently,three-dimensional(3D)graphene-based materials especially monolithic porous graphene with encapsulated functional nanomaterials have arisen much research interest for electrochemical catalysis,lithium ion batteries(LIBs),lithium–sulfur batteries,supercapacitors,etc.With the enhanced structure properties such as interconnected graphene network,high volume-specific surface area and electronic conductivity,3D monolithic graphene is more suitable for the fabrication of composite electrode materials in real devices.In this article,we discuss recent development in fabricating monolithic 3D graphene and their composites using template-directed methods and their applications in electrochemical energy-related areas. 展开更多
关键词 Nanoporous graphene Templatedirected synthesis COMPOSITE ELECTROCATALYSIS Lithium ion batteries
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Numerical study of contacts between a flat-ended punch and a half-space embedded with inhomogeneities 被引量:2
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作者 WANG Lei WANG WenZhong +3 位作者 WANG ZhanJiang WANG Hui MA TianBao HU YuanZhong 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2014年第4期684-697,共14页
This paper presented a numerical approach to solving the problem of a flat-ended punch in contact with a half-space matrix embedded with multiple three dimensional arbitrary-shaped inhomogeneities.Based on the semi-an... This paper presented a numerical approach to solving the problem of a flat-ended punch in contact with a half-space matrix embedded with multiple three dimensional arbitrary-shaped inhomogeneities.Based on the semi-analytical method(SAM)and the equivalent inclusion method,numerical procedures were developed and the effects of inclusion shape and distribution were analyzed.Fast Fourier transform technique was implemented to accelerate the calculation of surface deformation and subsurface stress.Interactions of inter-inclusions and inclusion-matrix were taken into account.Numerical results showed the presence of inhomogeneities(i.e.,microstructures in solids)indeed had a great effect on local contact pressure and a strong disturbance to the subsurface stress field in the vicinity of inclusions.The effects were dependent on the shape and distribution of inclusions and inter-inclusion interactions.The physical significance of this study is to provide an insight into the relation between the material microstructure and its response to the external load,and the solution approach and procedures may find useful applications,for example,the analysis of fatigue and crack propagation for composite materials,prediction of stress field in solids containing material defects,and study of the mechanism of chemical-mechanical polish(CMP)for inhomogeneous materials,etc. 展开更多
关键词 INHOMOGENEITY inhomogeneous inclusions equivalent inclusion method contact mechanics
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Recent advances in ionic liquid-based electrochemical biosensors 被引量:5
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作者 王晓琳 郝京诚 《Science Bulletin》 SCIE EI CAS CSCD 2016年第16期1281-1295,共15页
Ionic liquids (ILs) have been generally described as molten salts which are composed of asymmetric cations and anions. They exist in liquid state below 100 ℃. Both ILs and their composite materials have been widely... Ionic liquids (ILs) have been generally described as molten salts which are composed of asymmetric cations and anions. They exist in liquid state below 100 ℃. Both ILs and their composite materials have been widely used in various fields. Attributed to the outstanding properties including the thermal and chemical stabilities, the negligible volatility, the high ionic conductivity, the wide electrochemical window, and the easy design in the construction, ILs have been applied in electrochemical applications including the electrocatalysis, the electrosynthesis, the electrodeposition, the electrochamical devices and sensors. In addition to the application in electrochemical sensors, ILs have also been used in biosensors because of their biocompatibiciy. Here, we review the recent devel- opments for the applicaitons of ILs in electrochemical sensors and biosensors, including the corresponding properties of ILs suitable for electrochemical sensors. Electrochemical biosensors constructed by numorous composites are the emphasis in the review. 展开更多
关键词 Ionic liquids Electrochemical sensors Biosensors
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