检索结果-南通市图书馆

Nano-Micro Letters 2025年第3期17卷 102-116页

作者： Xin Tang Hongsheng Jiang Zhengliang Lin Xuan wang wenliang wang Guoqiang Li State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Department of Electronic Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible ***,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered ***,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays *** as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II ***,the strain-tunable photodetection performances of device have been ***,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible *** work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors

Test Data Generation for Multiple Paths Based on Local Evolution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2015年第1期24卷 46-51页

作者： YAO Xiangjuan GONG Dunwei wang wenliang College of Science China University of Mining and Technology School of Information and Electrical Engineering China University of Mining and Technology

Generating test data by genetic algorithms is a promising research direction in software testing, among which path coverage is an important test method. The efficiency of test data generation for multi-path coverage needs to be further improved. We propose a test data generation method for multi-path coverage based on a genetic algorithm with local evolution. The mathematical model is established for all target paths, while in the algorithm the individuals are evolved locally according to different objective functions. We can improve the utilization efficiency of test data. The computation cost can be reduced by using fitness functions of different granularity in different phases of the algorithm.

关键词： Test data generation Path coverage Genetic algorithm Local evolution.

Asymmetric Direct Aldol Reaction of Cyclohexanone Catalyzed by （ N＇-BenzyI-N＇-D-prolyl）-trans-4- hydroxy-L-proline Hydrazide

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2011年第1期29卷 196-198页

作者： Cheng, Chuanling wang, wenliang School of Food and Biological Engineering Zhengzhou UniversiO' of Light lndusto' Zhengzhou Henan 450002 China

A new proline catalyst, namely （N＇-benzyl-N＇-D-prolyl）-trans-4-hydroxy-L-proline hydrazide, has been prepared and proved to be a superior catalyst for the asymmetric aldol reaction of cyclohexanone and aromatic al... 详细信息

关键词： asymmetric aldol reaction proline hydrazide enantioselectivity diastereoselectivity cyclohexanone

Role of glycine on sulfuric acid-ammonia clusters formation:Transporter or participator

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2020年第3期32卷 125-135页

作者： Danfeng Li Dongping Chen Fengyi Liu wenliang wang Key Laboratory for Macromolecular Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China

Glycine(Gly) is ubiquitous in the atmosphere and plays a vital role in new particle formation(NPF).However,the potential mechanism of its on sulfuric acid(SA)-ammonia(A)clusters formation under various atmospheric conditions is still ***,a(Gly)x·(SA)y·(A)z(z≤x+y≤3) multicomponent system was investigated by using density functional theory(DFT) combined with Atmospheric Cluster Dynamics Code(ACDC) at different temperatures and precursor *** results show that Gly,with one carboxyl(-COOH) and one amine(-NH2) group,can interact strongly with SA and A in two directions through hydrogen bonds or proton *** the relevant range of atmospheric concentrations,Gly can enhance the formation rate of SA-A-based clusters,especially at low temperature,low [SA],and median [A].The enhancement(R) of Gly on NPF can be up to 340 at T=218.15 K,[SA]=10^4,[A]=10^9,and [Gly]=107 molecules/cm^*** addition,the main growth paths of clusters show that Gly molecules participate into cluster formation in the initial stage and eventually leave the cluster by evaporation in subsequent cluster growth at low [Gly],it acts as an important "transporter" to connect the smaller and larger *** the increase of [Gly],it acts as a "participator" directly participating in NPF.

关键词： New particle formation(NPF) Glycine Atmospheric cluster Atmospheric cluster dynamics code Enhancement mechanism

维普期刊数据库

Computational Study on Mechanisms of C2H5O2＋OH Reaction and Properties of C2H5O3H Complex

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2017年第4期33卷 623-630页

作者： LIU Yanli CHEN Long CHEN Dongping wang Weina LIU Fengyi wang wenliang Key Laboratory for Macromolecular Science of Shaanxi Province School of Chemistry and Chemical Engineering Shaanxi Normal University Xi "an 710119 P. R. China

A comprehensive theoretical study on the bimolecular reaction of C2H502 with OH radicals was performed at the CCSD（T）/6-311＋＋G（2df2p）//B3LYP/6-311＋G（d,p） level of theory. The calculation results show that C2H5O2 ＋ OH reaction proceeds on both the singlet and the triplet potential energy surfaces（PESs）. On the singlet PES, the favorable pathway is the addition of OH radical to the terminal oxygen atom of C2H5O2 radical, leading to the formation of trioxide C2H5O3H with a barrierless process. Then, the trioxide directly decomposes to the products C2H50 and HO2 radicals. On the triplet PES, the predominant pathways are a and β hydrogen atom abstractions of C2H5O2 radical by OH radical-forming products 3CH3CHO2＋H2O and 3CH2CH2O2＋H2O, and the corresponding bar- tiers are 12.02（3TS8） and 19.19 kJ/mol（3TS9）, respectively. In addition, the comprehensive properties of trioxide C2H503H were investigated for the ftrst time. The results indicate that the trioxide complex RC1 can exist stably in the atmosphere owing to a significantly large and negative enthalpy of formation（-118.44 kJ/mol） as well as a high first excitation energy（5.94 eV）.

关键词： C2H5O2 radical Trioxide C2H5O3H complex Reaction mechanism Enthalpy of formation First excited energy

Impact of Water Molecules on the Isomerization of CH3S（OH）CH2 to CH3S（O）CH3： A Computational Investigation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2013年第10期31卷 1341-1347页

作者： Cao Jia wenliang wang Tianlei Zhang Loujun Gao Feng Fu Danjun wang Key Laboratory for Macromolecular Science of Shaanxi Province School of Chemistry & Chemical Engineering Shaanxi Normal University Xi' an Shaanxi 710062 China College of Chemistry & Chemical Engineering Yan 'an University Yan'an Shaanxi 716000 China

The isomerization of CH3S（OH）CH2 to CH3S（O）CH3 in the absence and presence of water has been investigated at the G3XMP2//B3LYP/6-311 ＋ G（2df, p） level. The naked isomerization, the reaction without water, gives the high barrier height （21.56 ***^-1）. Three models are constructed to describe the water influence on the isomerization, that is, water molecules are the catalyst and the microsolvation, and water molecules act as the catalyst and microsolvation simultaneously. Our results show that the isomerization barrier heights of CH3S（OH）CH2 to CH3S（O）CH3 are reduced by 12.32, 11.04, and 7.80 ***^-1, respectively, when one, two, and three water molecules are performed as catalyst, in contrast to the naked isomerization. Moreover, the rate constants of the isomerization are calculated using the transition state theory with the Wigner tunneling correction over the temperature range of 240-425 K. We find that the rate constant of a single water molecule as the catalyst is 1.58 times larger than the naked isomerization at 325 K, whereas it is slower by 6 orders of magnitude when water molecule serves as the microsolvation at 325 K, compared to naked reaction. So the water-catalyzed isomerization of CH3S（OH）CH2 to CH3S（O）CH3 is predicted to be the key role in lowering the activation energy. The isomerization involving water molecules acting as mierosolvation is unfavorable under atmospheric conditions.

关键词： CH3S(O)CH3 CH3S(OH)CH2 water effect isomerization mechanism kinetic

Theoretical Prediction on Photovoltaic Properties of 4CI-BPPQ/ PC61BM System via Density Functional Theory Calculations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2016年第11期34卷 1143-1150页

作者： Caibin Zhao Qiang Zhang Ke Zhou Hongguang Ge wenliang wang Shiwei Yin Shaanxi Province Key Laboratory of Catalytic Fundamentals and Applications School of Chemical and Environmental Science Shaanxi University of Technology Hanzhong Shaanxi 723000 China Key Laboratory for Macromolecular Science of Shaanxi Province School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710062 China

Designing and synthesizing high-performable electron donor materials are very important for fabricating organic solar cell devices with high power conversion efficiency （PCE）. In this work, quantum chemical and molecular dynamics calculations coupled with the Marcus-Hush charge transfer model were used to investigate the photovoltaic properties of 4Cl-BPPQ/PC61BM. Results reveal that 4Cl-BPPQ/PCrlBM system theoretically possesses a large open-circuit voltage （1.29 V）, high fill factor （0.90）, and over 9% PCE. Moreover, calculations also reveal that the 4Cl-BPPQ/PC61BM system has a middle-sized exciton binding energy （0.492 eV）, but relatively small charge-dissociation and charge-recombination reorganization energies （0.345 eV and 0.355 eV）. Based on the 4CI-BPPQ/PC61BM complex, the charge-dissociation rate constant, kdis, is estimated to be as large as 6.575× 10^12 s^-1, while the charge-recombination one, krec, is very small （〈 1.0 s^-1） under the same condition due to the very small driving force （AGree=-1.900 eV）. In addition, by means of an amorphous cell containing one hundred 4C1-BPPQ molecules, the hole carrier mobility of 4CI-BPPQ solid is estimated as high as 3.191 × 10^-3 cm^2·V^-1·s^-1. In brief, our calculation shows that 4Cl-BPPQ/PC61BM system is a very promising organic solar cell system, and is worth of making further device research by experiments.

关键词： PC61BM 4Cl-BPPQ density functional theory photovoltaic properties theoretical prediction

Synthesis, characterization, antibacterial and photocatalytic performance of Ag/AgI/TiO2 hollow sphere composites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Materials Science 2020年第1期14卷 1-13页

作者： Zhihong Jing Xiue Liu Yan Du Yuanchun He Tingjiang Yan wenliang wang Wenjuan Li College of Chemistry and Chemical Engineering Qufu Normal UniversityQufu273165China

Dispersed TiO2 hollow spheres were successfully prepared which was obtained via Ostwald ripening under solvothermal conditions without any templates or surfactants. Then, the AgI/TiO2 was synthesized by the deposition-precipitation process. Finally, Ag/AgI/TiO2 was obtained by a photocatalytic reduction way. Their characteristics were analyzed by XRD, SEM, HRTEM, N2 adsorption-desorption measurements and UV-vis absorption spectra. To demonstrate the potential applications of such composites, their antibacterial activity against Escherichia coli (E. coli) was studied by microcalorimetry for the first time, and their photocatalytic performance for degradation of different organic dyes under simulated UV and visible light was discussed. The results indicated that Ag/AgI/TiO2 hollow spheres revealed elevated antibacterial and photocatalytic activity because of their unique morphology, hollow structure and high surface area. The mechanism of the excellent antibacterial and photocatalytic activity of Ag/AgI/TiO2 hollow spheres are discussed which are attributed to the synergetic effect of Ag, AgI and TiO2. It suggested that the new Ag/AgI/TiO2 photocatalyst has broad application prospects in solar cell, sensor, antibacterial, catalysis and nanotechnology.

关键词： Ag/AgI/TiO2 hollow sphere Ostwald ripening microcalorimetric method antibacterial and photocatalytic performance

Intestinal tryptophan metabolism in disease prevention and swine production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Animal Nutrition 2023年第4期15卷 364-374页

作者： Zhenguo Hu Luya Feng Qian Jiang wenliang wang Bi'e Tan Xiongzhuo Tang Yulong Yin Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesNational Center of Technology Innovation for Synthetic BiologyTianjin 300308China Animal Nutritional Genome and Germplasm Innovation Research Center College of Animal Science and TechnologyHunan Agricultural UniversityChangshaHunan 410128China Laboratory of Animal Nutritional Physiology and Metabolic Process Institute of Subtropical AgricultureChinese Academy of ScienceChangshaHunan 410125China

Tryptophan(Trp)is an essential amino acid that cannot be synthesized by *** has been characterized into two different isomers,levorotation-Trp(L-Trp)and dextrorotation-Trp(D-Trp),based on their distinct molecule *** epithelial cells and gut microbiota are involved in metabolizing L-Trp in the gut via the activation of the kynurenine,serotonin,and indole ***,knowledge regarding D-Trp metabolism in the gut remains *** this review,we briefly update the current understanding of intestinal L/D-Trp metabolism and the function of their metabolites in modulating the gut physiology and ***,we summarize the effects of Trp nutrition on swine production at different stages,including growth performance in weaned piglets and growing pigs,as well as the reproduction performance in sows.

关键词： Tryptophan metabolism Gut microbiota Diseases Swine production

维普期刊数据库

Solvent-enhanced Depolymerization of Lignin under Microwave Irradiation

在线全文

学校读者我要写书评

暂无评论

Paper And Biomaterials 2021年第3期6卷 30-38页

作者： wenliang wang Jiale Huang Xingjin Zhao Xiaoxiao Ren Hui Miao National Demonstration Center for Experimental Light Chemistry Engineering Education(Shaanxi University of Science&Technology) Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper DevelopmentKey Laboratory of Paper based Functional Materials of China National Light IndustryCollege of Bioresources Chemical and Materials EngineeringShaanxi University of Science&TechnologyXi'anShaanxi Province710021China Key Laboratory of Pulp and Paper Science&Technology of Ministry of Education Qilu University of Technology(Shandong Academy of Sciences)Ji'nanShandong Province250353China

Lignin is considered an ideal natural material for the production of sustainable *** this study,a microwave-assisted depolymerization(MAD)strategy was *** introduction of solvent vapors in the dynamic vapor flow reaction system was performed to enhance the lignin conversion *** results showed that no liquid products were generated from the MAD of lignin without solvent *** the introduction of solvents(CH_(3)OH,HCHO,HCOOH,and CH_(2)Cl_(2)),liquid products appeared(especially with CH_(2)Cl_(2),which had the highest yield of 41.9 wt%).Results from gas chromatography/mass spectrometry of liquid products showed that seven kinds of compounds,including guaiacols,phenols,syringols,methoxyphenyls,heterocycles,esters,and aromatics were ***_(2)Cl_(2) can significantly enhance the production of monophenols(guaiacols,phenols,and syringols).The introduction of these solvent vapors can also facilitate the generation of porous char with high Brunauer-Emmett-Teller specific surface *** carbon nanospheres deposited on the surface of the char were obtained with the assistance of CH_(2)Cl_(2).This study provides a facile method for the utilization of lignin in the field of bio-based fine chemicals.

关键词： lignin microwave solvent monophenols porous char

维普期刊数据库