期刊文献+
共找到233篇文章
< 1 2 12 >
每页显示 20 50 100
A short overview of the lead iodide residue impact and regulation strategies in perovskite solar cells
1
作者 Eng Liang Lim Zhanhua Wei 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第3期504-510,I0012,共8页
Lead iodide(PbI2) is a vital raw material for preparing perovskite solar cells(PSCs),and it not only takes part in forming the light absorption layer but also remains in the grain boundary as a passivator.In other wor... Lead iodide(PbI2) is a vital raw material for preparing perovskite solar cells(PSCs),and it not only takes part in forming the light absorption layer but also remains in the grain boundary as a passivator.In other words,the PbI2 content in the precursor and as formed film will affect the efficiency and stability of the PSCs.With moderate residual PbI2,it passivates the bulk/surface defects of perovskite,reduces the interfacial recombination,promotes the perovskite stability,minimizes the device hysteresis,and so on.Deficient PbI2 residue will reduce the interfacial passivation effect and device performance.In addition to facilitating the non-radiative recombination,over PbI2 residue can also lead to electronic insulation in the grain boundary and deteriorate the device performance.However,the impact and regulation of PbI2 residue on the device performance and stability is still not fully understood.Herein,a comprehensive and detailed review is presented by discussing the PbI2 residue impact and its regulation strategies(i.e., elimination,facilitation and conversion of the residue PbI2) to manipulate the PbI2 content,distribution and forms.Finally,we also show future outlooks in this field,with an aim to help further the progression of high-efficiency and stable PSCs. 展开更多
关键词 Lead iodide RESIDUE REGULATION Perovskite solar cells Efficiency Stability
下载PDF
Algebraic Properties for Molecular Structure of Magnesium Iodide
2
作者 Ali N.A.Koam Ali Ahmad +1 位作者 Muhammad Azeem Muhammad Kamran Siddiqui 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第5期1131-1146,共16页
As an inorganic chemical,magnesium iodide has a significant crystalline structure.It is a complex and multifunctional substance that has the potential to be used in a wide range of medical advancements.Molecular graph... As an inorganic chemical,magnesium iodide has a significant crystalline structure.It is a complex and multifunctional substance that has the potential to be used in a wide range of medical advancements.Molecular graph theory,on the other hand,provides a sufficient and cost-effective method of investigating chemical structures and networks.M-polynomial is a relatively new method for studying chemical networks and structures in molecular graph theory.It displays numerical descriptors in algebraic form and highlights molecular features in the form of a polynomial function.We present a polynomials display of magnesium iodide structure and calculate several M-polynomials in this paper,particularly the M-polynomials of the augmented Zagreb index,inverse sum index,hyper Zagreb index and for the symmetric division index. 展开更多
关键词 Magnesium iodide M-polynomials algebraic properties of magnesium iodide algebraic formation of numerics of magnesium iodide
下载PDF
Efficient solar fuel production enabled by an iodide oxidation reaction on atomic layer deposited MoS_(2)
3
作者 Young Sun Park Gyumin Jang +12 位作者 Inkyu Sohn Hyungsoo Lee Jeiwan Tan Juwon Yun Sunihl Ma Jeongyoub Lee Chan Uk Lee Subin Moon Hayoung Im Seung-Min Chung Seungho Yu Hyungjun Kim Jooho Moon 《Carbon Energy》 SCIE EI CAS CSCD 2023年第12期200-214,共15页
Oxygen evolution reaction(OER)as a half-anodic reaction of water splitting hinders the overall reaction efficiency owing to its thermodynamic and kinetic limitations.Iodide oxidation reaction(IOR)with low thermodynami... Oxygen evolution reaction(OER)as a half-anodic reaction of water splitting hinders the overall reaction efficiency owing to its thermodynamic and kinetic limitations.Iodide oxidation reaction(IOR)with low thermodynamic barrier and rapid reaction kinetics is a promising alternative to the OER.Herein,we present a molybdenum disulfide(MoS_(2))electrocatalyst for a high-efficiency and remarkably durable anode enabling IOR.MoS_(2)nanosheets deposited on a porous carbon paper via atomic layer deposition show an IOR current density of 10 mA cm^(–2)at an anodic potential of 0.63 V with respect to the reversible hydrogen electrode owing to the porous substrate as well as the intrinsic iodide oxidation capability of MoS_(2)as confirmed by theoretical calculations.The lower positive potential applied to the MoS_(2)-based heterostructure during IOR electrocatalysis prevents deterioration of the active sites on MoS_(2),resulting in exceptional durability of 200 h.Subsequently,we fabricate a two-electrode system comprising a MoS_(2)anode for IOR combined with a commercial Pt@C catalyst cathode for hydrogen evolution reaction.Moreover,the photovoltaic–electrochemical hydrogen production device comprising this electrolyzer and a single perovskite photovoltaic cell shows a record-high current density of 21 mA cm^(–2)at 1 sun under unbiased conditions. 展开更多
关键词 iodide oxidation reaction molybdenum sulfide photovoltaic-electrochemical hydrogen production solar hydrogen
下载PDF
Efficient Environment-friendly Lead-free Tin Perovskite Solar Cells Enabled by Incorporating 4-Fluorobenzylammonium Iodide Additives
4
作者 Shengli Zou Shengqiang Ren +8 位作者 Yiting Jiang Yuanfang Huang Wenwu Wang Changlei Wang Cong Chen Xia Hao Lili Wu Jingquan Zhang Dewei Zhao 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第6期318-326,共9页
Development of tin(Sn)-based perovskite solar cells(PSCs)largely lags behind that of lead counterparts due to fast crystallization process of Sn perovskite and numerous defects in both bulk and surface of Sn perovskit... Development of tin(Sn)-based perovskite solar cells(PSCs)largely lags behind that of lead counterparts due to fast crystallization process of Sn perovskite and numerous defects in both bulk and surface of Sn perovskite films.Herein,this work reports a facile strategy of introducing 4-fluorobenzylammonium iodide(FBZAI)as additives into Sn perovskite precursor to synergistically modulate the roles of benzylamine and fluorine in Sn-based PSCs.Incorporation of FBZAI can increase crystallinity,passivate defects,and inhibit the oxidation of Sn^(2+),leading to suppression of nonradiative recombination and enhancement of charge transport and collection in devices.As a result,the best-performing Sn-based PSC with the FBZAI additive achieves the maximum PCE of 13.85%with the enhanced fill factor of 77.8%and open-circuit voltage of 0.778 V.Our unencapsulated device exhibits good stability by maintaining 95%of its initial PCE after 160 days of storage. 展开更多
关键词 4-fluorobenzylammonium iodide defect passivation lead-free Sn perovskites perovskite solar cells stability
下载PDF
Treating CsPbI_(3) Perovskite with Pyrrolidinium Iodide to Improve the Performance of Perovskite Solar Cells
5
作者 Qixian Zhang Yi Guo +3 位作者 Huicong Liu Weiping Li Liqun Zhu Haining Chen 《Journal of Renewable Materials》 EI 2023年第8期3193-3201,共9页
All-inorganic CsPbI_(3) perovskite has attracted wide attention due to its desirable optical bandgap(Eg:∼1.7 eV)as well as high chemical stability.Nevertheless,the photovoltaic performance of CsPbI_(3) perovskite sol... All-inorganic CsPbI_(3) perovskite has attracted wide attention due to its desirable optical bandgap(Eg:∼1.7 eV)as well as high chemical stability.Nevertheless,the photovoltaic performance of CsPbI_(3) perovskite solar cells(PSCs)was limited by severe nonradiative charge recombination due to high defect density at the grain boundary and surface of perovskitefilms.To address this issue,a pyrrolidinium iodide(PyI)molecule was introduced to modify the surface and grain boundary of CsPbI_(3) perovskitefilms to passivate defects,which improves the quality of CsPbI_(3) perovskitefilms as well as induces the generation of a quasi-2D Py_(2)CsPb_(2)I_(7) capping layer between per-ovskite layer and hole transport layer.Such quasi-2D Py_(2)CsPb_(2)I_(7) capping layer optimizes interface contact between CsPbI_(3) perovskite layer and hole transport layer and blocks the electron transfer from CsPbI_(3) perovskite photoactive layer to the hole transport layer.As a result,the performance of CsPbI_(3) PSCs is well improved to 17.87%for power conversion efficiency(PCE)with an ultra-high fill factor(FF)of 0.84.In addition,the PyI mole-cule modified CsPbI_(3) perovskite devices exhibit excellent stability,which remains its initial PCE almost unchanged after aging for 35 days under the dry air atmosphere(temperature:20℃–30℃,control relative humid-ity(RH):<10%). 展开更多
关键词 CsPbI_(3) INORGANIC PEROVSKITE defect passivation pyrrolidinium iodide
下载PDF
Transfection of the Human Sodium/Iodide Symporter(NIS) Gene with Liposomes and the Expression of the NIS Protein in Human Lung A549 Cancer Cells 被引量:1
6
作者 严煜 张宏飞 +1 位作者 张裕东 王晓谭 《Chinese Journal of Clinical Oncology》 CSCD 2008年第1期30-34,共5页
OBJECTIVE To examine the possibility of human sodium iodide symporter (hNIS) protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided in... OBJECTIVE To examine the possibility of human sodium iodide symporter (hNIS) protein expression in lung cancer cells. METHODS Human lung A549 cancer cells were thawed and cultured in vitro. The cells were divided into an experimental group transfected with a recombinant pcDNA3-hNIS plasmid and a control group transfected only with a pcDNA3 plasmid. The recombinant plasmid vector encoding the hNIS gene (pcDNA3-hNIS) was amplified, purified and identified. The hNIS gene was followed by DNA sequencing. A Western blot and an immunohistochemical assay were applied to detect the hNIS protein expression in the transfected human lung A549 cancer cells. RESULTS Restriction enzyme digestion and DNA sequencing results showed the size and direction of the inserted gene in the recombinant pcD- NA3-hNIS plasmid was correct. The Western blot method and immunohistochemical analysis showed a positive NIS protein expression in the experimental group. The NIS protein was detected mainly in the cell membranes showing a positive rate up to 70.6% with no expression of the NIS protein in the control group. There was a significant difference between two groups (P=0.000). CONCLUSION The hNIS gene was transfected effectively into human lung A549 cancer cells mediated by Lipofectamine 2000, and was expressed with its protein in vitro. 展开更多
关键词 human sodium/iodide symporter (SIN) non-small-cell-lung cancer (NSCLC) gene transfection LIPOSOME radioiodide therapy
下载PDF
Efficiency enhancement of Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) perovskite solar cell by surface passivation using iso-butyl ammonium iodide
7
作者 Wakul Bumrungsan Kritsada Hongsith +4 位作者 Vasan Yarangsi Pisith Kumnorkeaw Sukrit Sucharitakul Surachet Phaduangdhitidhada Supab Choopun 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第11期1963-1970,共8页
Efficiency enhancement of Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) solar cell devices was performed by using iso-butyl ammonium iodide(IBA)passivated on Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) films.The n-i-p structure of pero... Efficiency enhancement of Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) solar cell devices was performed by using iso-butyl ammonium iodide(IBA)passivated on Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) films.The n-i-p structure of perovskite solar cell devices was fabricated with the structure of FTO/SnO_(2)/Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3)(FTO,i.e.,fluorine doped tin oxide)and IBA/Spiro-OMeTAD/Ag.The effect of different weights of IBA passivated on Cs-doped perovskite solar cells(PSCs)was systematically investigated and compared with non-passivated devices.It was found that the 5-mg IBA-passivated devices exhibited a high power conversion efficiency(PCE)of 15.49%higher than 12.64%of non-IBA-passivated devices.The improvement of photovoltaic parameters of the 5-mg IBA-passivated device can be clearly observed compared to the Cs-doped device.The better performance of the IBA-passivated device can be confirmed by the reduction of PbI_(2) phase in the crystal structure,lower charge recombination rate,lower charge transfer resistance,and improved contact angle of perovskite films.Therefore,IBA passivation on Cs_(0.1)(CH_(3)NH)_(0.9)PbI_(3) is a promising technique to improve the efficiency of Cs-doped perovskite solar cells. 展开更多
关键词 perovskite solar cell power conversion efficiency surface passivation cesium methylammonium lead iodide iso-butyl ammoni-um iodide
下载PDF
Remarkable rate acceleration of SmI3-mediated iodination of acetates of Baylis-Hillman adducts in ionic liquid: facile synthesis of (Z)-allyl iodides
8
作者 LIU Yun-kui ZHENG Hui XU Dan-qian XU Zhen-yuan ZHANG Yong-min 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2006年第3期193-197,共5页
Stereoselective transformation of Baylis-Hillman acetates I into corresponding (Z)-allyl iodides 2 has been achieved by treatment of I with samarium triiodide in THF. Remarkable rate acceleration of samarium triiodi... Stereoselective transformation of Baylis-Hillman acetates I into corresponding (Z)-allyl iodides 2 has been achieved by treatment of I with samarium triiodide in THF. Remarkable rate acceleration of samarium triiodide-mediated iodination of 1 was found when ionic liquid 1-n-butyl-3-methyl-imidazolium tetrafluroborate ([bmim]BF4) was used as reaction media in stead of THF. This novel approach proceeds readily at 50 ℃ within a few minutes to afford (Z)-allyl iodides 2 in excellent yields. A mechanism involving stereoselective iodination of the acetates of Baylis-Hillman adducts by samarium triiodide is described, in which a six-membered ring transition state played a key role in the stereoselective formation of 2. 展开更多
关键词 Baylis-Hillman adduct (Z)-allyl iodide Samarium triiodide Ionic liquid
下载PDF
Electron Momentum Spectroscopy of Valence Orbitals of n-Propyl Iodide: Spin-Orbit Coupling Effect and Intramolecular Orbital Interaction
9
作者 王恩亮 史钰峰 +3 位作者 单旭 阳弘江 张卫 陈向军 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第5期503-511,I0003,共10页
The binding energy spectrum and electron momentum distributions for the outer valence orbitals of n-propyl iodide molecule have been measured using the electron momentum spectrometer employing non-coplanar asymmetric ... The binding energy spectrum and electron momentum distributions for the outer valence orbitals of n-propyl iodide molecule have been measured using the electron momentum spectrometer employing non-coplanar asymmetric geometry at impact energy of 2.5 keV plus binding energy. The ionization bands have been assigned in detail via the high accuracy SACCI general-R method calculation and the experimental momentum profiles are compared with the theoretical ones calculated by Hartree-Fock and B3LYP/aug-cc-pVTZ(C,H)6-311G??(I). The spin-orbit coupling effect and intramolecular orbital interaction have been analyzed for the outermost two bands, which are assigned to the iodine 5p lone pairs, using NBO method and non-relativistic as well as relativistic calculations. It is found that both of the interactions will lead to the observed differences in electron momentum distributions. The experimental results agree with the relativistic theoretical momentum profiles, indicating that the spin-orbit coupling effect dominates in n-propyl iodide molecule. 展开更多
关键词 n-Propyl iodide Electron momentum spectroscopy Spin-orbit coupling effect Intramolecular orbital interaction
下载PDF
Study on gold concentrate leaching by iodine-iodide 被引量:8
10
作者 Hai-xia Wang Chun-bao Sun +4 位作者 Shao-ying Li Ping-feng Fu Yu-guo Song Liang Li Wen-qing Xie 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2013年第4期323-328,共6页
Gold extraction by iodine-iodide solution is an effective and environment-friendly method. In this study, the method using iodine-iodide for gold leaching is proved feasible through thermodynamic calculation. At the s... Gold extraction by iodine-iodide solution is an effective and environment-friendly method. In this study, the method using iodine-iodide for gold leaching is proved feasible through thermodynamic calculation. At the same time, experiments on flotation gold concentrates were carried out and encouraging results were obtained. Through optimizing the technological conditions, the attained high gold leaching rate is more than 85%. The optimum process conditions at 25℃ are shown as follows: the initial iodine concentration is 1.0%, the iodine-to-iodide mole ratio is 1:8, the solution pH value is 7, the liquid-to-solid mass ratio is 4:1, the leaching time is 4 h, the stirring intensity is 200 r/mim, and the hydrogen peroxide consumption is 1%. 展开更多
关键词 gold extraction LEACHING IODINE iodideS
下载PDF
The Determination of Iodide Based on a Flow-injection Coupling Irreversible Biamperometry 被引量:3
11
作者 Li Jun LI Hao CHENG +5 位作者 Wen Yi HUANG Hong Xing KONG Jian Ling WU Jian Ping LU Wei GAO Jun Feng SONG 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第12期1629-1632,共4页
A novel flow-injection irreversible biamperometric method is described for the direct determination of iodide. The method is based on electrochemical oxidation of iodide at the gold electrode and the reduction of perm... A novel flow-injection irreversible biamperometric method is described for the direct determination of iodide. The method is based on electrochemical oxidation of iodide at the gold electrode and the reduction of permanganate at the platinum electrode to form an irreversible biamperometric detection system. Under the applied potential difference of 0 V, in the 0.05 mol/L sulfuric acid, iodidecan be determined over the range 4.00×10^-7-1.00×10^-5 mol/L with a sampling frequency of 120 samples per hour. The detection limit for I- is 3.0×10^-7 mol/L and the RSD for 40 replicate determinations of 4.0×10^-5 mol/L potassium iodide is 1.68%. The new method was applied to the analysis of iodide in table salt with satisfactory results. 展开更多
关键词 iodide flow injection irreversible biamperometry gold electrode platinum electrode
下载PDF
Surface Treatment of Inorganic CsPbI_(3) Nanocrystals with Guanidinium Iodide for Efficient Perovskite Light-Emitting Diodes with High Brightness 被引量:2
12
作者 Minh Tam Hoang Amandeep Singh Pannu +5 位作者 Yang Yang Sepideh Madani Paul Shaw Prashant Sonar Tuquabo Tesfamichael Hongxia Wang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第4期277-288,共12页
The remarkable evolution of metal halide perovskites in the past decade makes them promise for next-generation optoelectronic material.In particular,nanocrystals(NCs)of inorganic perovskites have demonstrated excellen... The remarkable evolution of metal halide perovskites in the past decade makes them promise for next-generation optoelectronic material.In particular,nanocrystals(NCs)of inorganic perovskites have demonstrated excellent performance for light-emitting and display applications.However,the presence of surface defects on the NCs negatively impacts their performance in devices.Herein,we report a compatible facial post-treatment of CsPbI_(3) nanocrystals using guanidinium iodide(GuI).It is found that the GuI treatment effectively passivated the halide vacancy defects on the surface of the NCs while offering effective surface protection and exciton confinement thanks to the beneficial contribution of iodide and guanidinium cation.As a consequence,the film of treated CsPbI_(3) nanocrystals exhibited significantly enhanced luminescence and charge transport properties,leading to high-performance light-emitting diode with maximum external quantum efficiency of 13.8%with high brightness(peak luminance of 7039 cd m^(−2) and a peak current density of 10.8 cd A^(−1)).The EQE is over threefold higher than performance of untreated device(EQE:3.8%).The operational half-lifetime of the treated devices also was significantly improved with T50 of 20 min(at current density of 25 mA cm^(−2)),outperforming the untreated devices(T50~6 min). 展开更多
关键词 CsPbI_(3)perovskites NANOCRYSTALS Light-emitting diodes PHOTOLUMINESCENCE Surface passivation Guanidinium iodide
下载PDF
Preparation, Characterization and Optical Properties of Host-guest Nanocomposite Material Mordenite-silver Iodide 被引量:2
13
作者 ZHAIQing-zhou QIUShi-lun 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2003年第2期140-144,共5页
Silver iodide nanoclusters were successfully prepared in the channels of mordenite by a heat diffusion method. Powder X ray diffraction, adsorption technique and infrared spectroscopy were used to characterize the pr... Silver iodide nanoclusters were successfully prepared in the channels of mordenite by a heat diffusion method. Powder X ray diffraction, adsorption technique and infrared spectroscopy were used to characterize the prepared materials, which showed that the guest silver iodide had been encapsulated in the channels of mordenite. The optical properties of the solid phase diffuse reflectance absorption of nanocomposite material NaM AgI were studied, showing that the absorption bands of the diffuse reflectance absorption of the prepared material moved to the region of high energy. The absorption peak of the material prepared shifted to the region of high energy. Namely, blue shift was caused. This has demonstrated the incorporation of silver iodide into the channels of the zeolite. We observed the luminescence and surface photovoltage spectra of NaM AgI sample, proposing the mechanisms of the photoluminescence and photovoltaic responses. 展开更多
关键词 Mordenite host Silver iodide guest Host guest nanocomposite material Optical property
下载PDF
Optimized Assay for Hydrogen Peroxide Determination in Plant Tissue Using Potassium Iodide 被引量:3
14
作者 Sanders Junglee Laurent Urban +1 位作者 Huguette Sallanon Félicie Lopez-Lauri 《American Journal of Analytical Chemistry》 2014年第11期730-736,共7页
Here, we present an optimization of colorimetric determination of hydrogen peroxide content in plants using potassium iodide. Our method is based on a one step buffer (extraction and reaction) for the determination of... Here, we present an optimization of colorimetric determination of hydrogen peroxide content in plants using potassium iodide. Our method is based on a one step buffer (extraction and reaction) for the determination of H2O2 in different plant tissues and overcomes interference of soluble antioxidant and color background. A particular attention is paid to buffer pH shown to be tissue dependent. With this inexpensive microplate method, it is possible to analyze 12 experimental samples in about 45 min all in triplicates, with blanks, controls and standard curve. 展开更多
关键词 Hydrogen PEROXIDE POTASSIUM iodide One Step MICROPLATE Inexpensive
下载PDF
Evaluation Research on Applicability of Rapid Iodide Migration Test 被引量:1
15
作者 宋子健 JIANG Linhua +1 位作者 CHU Hongqiang XIONG Chuansheng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第2期329-333,共5页
The applicability of the rapid iodide migration test was systematically studied. Comparative experimental tests of different test conditions, including several external voltages, test durations, concrete ages and mixi... The applicability of the rapid iodide migration test was systematically studied. Comparative experimental tests of different test conditions, including several external voltages, test durations, concrete ages and mixing proportions, were carried out to make clear the transport behaviors of iodide under parallel electric fields. Numerical simulations were also done using the finite element method to found the correlation between chloride and iodide transport behaviors. The test and numerical results show that the chloride transport behaviors of RIM and RCM tests have a good correlation under the several conditions used in the present paper. Moreover, the influence of external conditions (external voltages, test durations) on the test results is small. Thus, it can be concluded that the RIM method is available to determine the chloride penetration resistance of the chloride-eroded structural concrete. 展开更多
关键词 concrete CHLORIDE iodide MIGRATION RIM
下载PDF
Potassium iodide catalyzed reductive dehalogenation ofα-halo-ketones using Hantzsch ester diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate as reductant 被引量:1
16
作者 Hong Sheng Li Yi Qun Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第8期931-934,共4页
In the presence of diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate(DHP) and a catalytic amount of potassium iodide,severalα-halo ketones were easily reduced to the corresponding ketones in acetone media.... In the presence of diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate(DHP) and a catalytic amount of potassium iodide,severalα-halo ketones were easily reduced to the corresponding ketones in acetone media.The procedure presented here showed several merits such as short reaction time,practical experimental and isolated procedure,and excellent yields of products. 展开更多
关键词 DEHALOGENATION α-Halo ketones Hantzsch ester 1 4-Dihydro-2 6-dimethylpyridine-3 5-dicarboxylate Potassium iodide
下载PDF
Surface passivation using pyridinium iodide for highly efficient planar perovskite solar cells 被引量:1
17
作者 Yitian Du Jihuai Wu +6 位作者 Xinpeng Zhang Qianjin Zhu Mingjing Zhang Xuping Liu Yu Zou Shibo Wang Weihai Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第1期84-91,I0004,共9页
Perovskite solar cells have developed rapidly in the past decades.However,there are large amounts of ionic defects at the surface and grain boundaries of perovskte films which are detrimental to both the efficiency an... Perovskite solar cells have developed rapidly in the past decades.However,there are large amounts of ionic defects at the surface and grain boundaries of perovskte films which are detrimental to both the efficiency and stability of perovskite solar cells.Here,an organic halide salt pyridinium iodide(PyI) is used in cation-anion-mixed perovskite for surface defect passivation.Different from the treatment with Lewis base pyridine(Py) which can only bind to the under-coordinated Pb ions,zwitterion molecule PyI can not only fill negative charged iodine vacancies,but also interact with positive charged defects.Compared with Py treatment,PyI treatment results in smoother surface,less defect densities and nonradiative recombination in perovskite,leading to an improved VOC, negligible J-V hysteresis and stable performance of devices.As a result,the champion PyI-treated planar perovskite solar cell with a high VOC of 1.187 V achieves an efficiency of 21.42%,which is higher than 20.37% of Py-treated device,while the pristine device without any treatment gets an efficiency of 18.83% at the same experiment conditions. 展开更多
关键词 Perovskite solar cell Surface defect PASSIVATION Pyridinium iodide
下载PDF
Biomass Carbon Aerogel Modified by N235 and KH560 for Removal of Iodide from Oilfield Brine 被引量:1
18
作者 HU Yaoqiang GUO Min +2 位作者 YE Xiushen LIU Haining WU Zhijian 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2022年第4期608-619,共12页
Owing to porous structure,stable chemical properties,low cost and available raw material,biomass carbon aerogel is a promising adsorbent framework material.Herein,a pomelo peel-based carbon aerogel was prepared by hyd... Owing to porous structure,stable chemical properties,low cost and available raw material,biomass carbon aerogel is a promising adsorbent framework material.Herein,a pomelo peel-based carbon aerogel was prepared by hydrothermal-freeze drying-high temperature carbonization method and modified with Tri-n-ocylamine(N235)and γ-Glycidyloxypropyltrimethoxysilane(KH560)via impregnation process.The as-prepared adsorbents exhibit superior adsorption performance for iodide in simulated and oilfield brines,and the highest adsorption amount of iodide in oilfield brine can reach 0.58 mmol/g.It is also demonstrated by adsorption kinetics and isotherms that iodide is adsorbed through chemical adsorption.Protonation of tertiary amide group in N235 and epoxy group in KH560 may be the main reason for the highly selective adsorption of iodide. 展开更多
关键词 biomass carbon aerogel oilfield brine iodide ADSORPTION
下载PDF
Influence Factors on Photochemical Production of Methyl Iodide in Seawater 被引量:1
19
作者 CHEN Yan LIU Shanshan +1 位作者 YANG Guipeng HE Zhen 《Journal of Ocean University of China》 SCIE CAS CSCD 2020年第6期1353-1361,共9页
Methyl iodide(CH3I)is an important trace greenhouse gas in the atmosphere and an ozone-depleting substance.The influence of different environmental factors,such as the duration of illumination;the strength of illumina... Methyl iodide(CH3I)is an important trace greenhouse gas in the atmosphere and an ozone-depleting substance.The influence of different environmental factors,such as the duration of illumination;the strength of illumination;the concentrations of humic acid,ferric ion(Fe^3+),and iodide ion(I−);and pH,on the photochemical production of CH3I in artificial seawater(ASW)were tested by simulated solar irradiation.In addition,Yangtze River Estuary waters from inshore to offshore were used to explore the relationship between the photochemical production of CH3I and different sources of dissolved organic matter(DOM)in natural seawater(NSW).The results revealed that higher concentrations of humic acid and I−,as well as higher strengths of illumination and longer illumination durations,promoted the photochemical formation of CH3I in ASW.The addition of Fe^3+accelerated the photochemical production of CH3I,but high concentrations of Fe^3+inhibited the formation of CH3I.Experiments on NSW obtained from the Yangtze River estuary spiked when concentrations of DOM were high,confirming that DOM plays an important role in facilitating the photochemical production of CH3I within the Yangtze River Estuary.The photochemical production of CH3I in the seawater was significantly higher under light conditions relative to dark conditions,indicating that illumination accelerated the production of CH3I. 展开更多
关键词 methyl iodide photochemical production Yangtze River Estuary dissolved organic matter
下载PDF
Effect of preparation methods on Pt/alumina catalysts for the hydrogen iodide catalytic decomposition 被引量:1
20
作者 Zhi Chao Wang Lai Jun Wang Ping Zhang Song Zhe Chen Jing Ming Xu Jing Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2009年第1期102-105,共4页
Three kinds of Pt/alumina catalysts were prepared by impregnation-hydrogen reduction, impregnation-hydrazine reduction and electroless plating methods. Their differences in the structures, specific areas and particle ... Three kinds of Pt/alumina catalysts were prepared by impregnation-hydrogen reduction, impregnation-hydrazine reduction and electroless plating methods. Their differences in the structures, specific areas and particle sizes were characterized by XRD, BET and TEM, respectively. Furthermore, their catalytic activities for the hydrogen iodide (HI) decomposition were evaluated in a fixed bed reactor. The results show that the catalyst 5%Pt/Al2O3 prepared by the electroless plating has the optimum catalytic properties for HI decomposition owing to the high dispersion of the platinum nano-particles (〈5 nm) on the alumina supports. 展开更多
关键词 Hydrogen iodide Catalytic decomposition Pt/At2O3 Preparation methods
下载PDF
上一页 1 2 12 下一页 到第
使用帮助 返回顶部