检索结果-南通市图书馆

Electrochemical performance of a nano SnO_2-modified LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第11期26卷 1403-1408页

作者： Zhi-Mei Luo yan-guang sun Hui-Yong Liu School of Chemical Engineering Fuzhou University

The nano SnO2-modified LiNi1/3Co1/3Mn1/3O2 was successfully prepared by a carrier transfer method. The pristine and modified samples were characterized with various techniques such as XRD, SEM, XPS and EDS. The results showed that the SnO2particles did not enter the crystal structure of LiNi1/3Co1/3Mn1/3O2, many nano SnO2 particles were uniformly covered on the surface of LiNi1/3Co1/3Mn1/3O2 and the modified thin layer could inhibit the dissolution of transition metal oxides. The electrochemical tests indicated that the existence of nano SnO2 could improve the discharge capacity and rate capability owing to the decreased interfacial polarization, The cycling stability was remarkably improved at room temperature and 55 ℃. The XRD patterns of the fresh NCM electrode and after 50 cycles proved that the structural change of NCM was not so effective on the capacity fade.

关键词： Carrier transfer methodNano SnO2LiNi1/3Co1/3Mn1/3O2Surface modification

Theoretical Study on a Train of Bowl-Shaped PDI dimers Engineering with N-Annulated Bridges

在线全文

学校读者我要写书评

暂无评论

Theoretical Study on a Train of Bowl-Shaped PDI dimers Engin...

Theoretical studies on triphenylamine-based p-type sensitizers with different π-linkers for dyes-sensitized solar cells

第十三届全国量子化学会议

作者： Hang Yin guang-yan sun Department of Chemistry Faculty of Science Yanbian University

Perylene diimides(PDIs) based dimers as non-fullerene small molecule acceptors(SMAs) have been made significant advances recently,in the emerging field of bulk-heterojunction(BHJ) organic photovoltaic cells(OPVs). For further rendering PDI derivatives soluble and tailoring self-assembly, we focus much effort on a novel approach — engineering PDI dimers with N-annulated bridges constructing linked bowl *** facilitating more effective efficiency, multidirectional charge transport and active layer morphology in D/A blend were taken into account by tuning linkers' stereoscopic dimensions and the electron donating abilities. Our results demonstrate that, compared to planar 1,bowl-shaped N-annulated PDI dimers(2～6) have tuned energy level structures, revealed sustaining optical absorption, obtained reasonable Gibbs free energy and ensured effective charge transfer. Moreover, we highlight that D/4 and D/6 exhibit the most excellent optical performance,due to the introduction of expanding conjugated stereoscopic π-bridge SF based on the symmetric bowl shape or the prospective "A-D-A" structure with D-bridge NDT. We expect on this work for modified N-annulated PDI dimers could become potential acceptor materials in BHJ OPVs.

关键词： organic photovoltaic cells bulk-heterojunction bowl-shaped PDI dimers N-annulated bridges

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Theoretical studies on triphenylamine-based p-type sensitize...

Theoretical insight into the performance of organic sensitizers for DSSCs: The influences of dithiophene rigidification

中国化学会第十二届全国量子化学会议

作者： Hai-Bin Li guang-yan sun Yun Geng Zhong-Min Su Institute of Functional Material Chemistry Faculty of ChemistryNortheast Normal University

The geometries,electronic structures,absorption spectra and the character of excited state for the reported p-type sensitizers O2,O6 and O7 and designed 1-5 with differentπ-linkers were investigated by DFT and TDDFT calculations,to reveal the influences ofπ-linkers on the performance of DSSCs[1].It is found that the higher IPCE of O7 as compared to O6 stems from the improved light harvesting efficiency（LHE）and the efficient *** for O2 and O6 with comparable IPCE,the slightly increased Jsc for O2 can be mainly ascribed to the better spectrum matching with solar *** results revealed that the calculated photoinduced electron-hole separation distance（DCT）for reported sensitizers is well correlated with the measured electron lifetime pertaining to ***,dye 4 may be a promising candidate for the p-type sensitizer due to the red-shifted absorption,larger LHE and longer DCT in comparison with prototype O7.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Theoretical insight into the performance of organic sensitiz...

An Efficient Protocol for the Liquid-Phase Synthesis of Furano- and Pyranoquinolines

中国化学会第十二届全国量子化学会议

作者： guang-yan sun Hai-Bin Li Ji Zhang Zhong-Min Su Department of Chemistry Faculty of ScienceYanbian University

Six different rigidifying modes of dithiopheneπ-spacer in organic D-π-A sensitizers（1-6）were taken into account to provide insight into this rigidification effects on the performance of dye sensitized solar cell（DSSCs）through density functional theory and time-dependent density functional theory calculations[1].The calculated results demonstrated that this rigidification has significant effects on the light harvesting,charge recombination and conduction band energy shift,which are important factors affecting the efficiency of the *** is found that dye 3 with rigidification via methylene is expected to have the best performance among these dyes,since it presents largest theoretical short circuit current density,and conduction band energy shift and similar charge recombination degree as compared to other rigidifying modes and *** dye 4 with rigidification via phosphine oxide group,it also has the red-shifted adsorption,and the much longer I2-Ti O2 distance could also lead to a slower ***,the rigidifying modes in sensitizers 3 and 4,which have never been used in organic sensitizers for DSSCs,could be promising building blocks for high-performance sensitizers.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

有机化学 2004年第Z1期24卷 342-页

作者： LIN,Xu-Feng WANG,yan-guang CUI,sun-Liang yanG,Wei-Qiang Department of Chemistry Zhejiang University Hangzhou 310027 Department of Chemistry Zhejiang University Hangzhou 310027 Department of Chemistry Zhejiang University Hangzhou 310027 Zheijiang Hisun Pharmaceutical Co Ltd Taizhou 318000

　　In recent years, the liquid-phase synthesis of small heterocyclic molecules has been a subject of intense research activity, since it represents one of the most promising ways to generate small molecular libraries in the field of combinatorial chemistry. Substituted quinolines offer a high degree of structure diversity and have proven to be very important in medicinal chemistry.……

关键词： combinatorial chemistry medicinal chemistry

A Novel Model for Describing Rail Weld Irregularities and Predicting Wheel-Rail Forces Using a Machine Learning Approach

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2025年第1期142卷 555-577页

作者： Linlin sun Zihui Wang Shukun Cui Ziquan yan Weiping Hu Qingchun Meng State Key Laboratory of High-Speed Railway Track System China Academy of Railway Sciences Corporation LimitedBeijing100081China Railway Engineering Research Institute China Academy of Railway Sciences Corporation LimitedBeijing100081China School of Aeronautic Science and Engineering Beihang UniversityBeijing100191China

Rail weld irregularities are one of the primary excitation sources for vehicle-track interaction dynamics in modern high-speed *** can cause significant wheel-rail dynamic interactions,leading to wheel-rail noise,component damage,and *** researchers have employed the vehicle-track interaction dynamic model to study the dynamic interactions between wheel and rail induced by rail weld geometry ***,the cosine wave model used to simulate rail weld irregularities mainly focuses on the maximum value and neglects the geometric *** this study,novel theoretical models were developed for three categories of rail weld irregularities,based on measurements of the high-speed railway from Beijing to *** vertical dynamic forces in the time and frequency domains were compared under different running *** forces generated by the rail weld irregularities that were measured and modeled,respectively,were compared to validate the accuracy of the proposed ***,based on the numerical study,the impact force due to rail weld irrregularity is modeled using an Artificial Neural Network(ANN),and the optimum combination of parameters for this model is *** results showed that the proposed model provided a more accurate wheel/rail dynamic evaluation caused by rail weld irregularities than that established in the *** ANN model used in this paper can effectively predict the impact force due to rail weld irrregularity while reducing the computation time.

关键词： Rail weld irregularity high-speed railway vehicle-track coupled dynamics wheel/rail dynamic vertical force artificial neural networks

晚期氧化蛋白产物对2型糖尿病视网膜病变进展的预测价值

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国糖尿病杂志 2017年第2期25卷 116-120页

作者：时倩倩高彦孙广莉郑州人民医院眼科 450053 郑州大学第一附属医院眼科

目的探讨晚期氧化蛋白产物(AOPP)能否预测DR进展情况。方法采用前瞻性队列研究方法纳入T2DM患者363例,根据基线AOPP水平四分位点将受试者分为4组(Q1、Q2、Q3、Q4),根据5年随访前后免散瞳眼底摄片结果计算DR进展率。结果随基线AOPP水平升... 详细信息

目的探讨晚期氧化蛋白产物(AOPP)能否预测DR进展情况。方法采用前瞻性队列研究方法纳入T2DM患者363例,根据基线AOPP水平四分位点将受试者分为4组(Q1、Q2、Q3、Q4),根据5年随访前后免散瞳眼底摄片结果计算DR进展率。结果随基线AOPP水平升高,5年后DR进展率升高(19.51%vs 28.42%vs 37.36%vs 47.37%,P<0.01)。Logistic回归分析显示,基线AOPP水平是影响DR进展的独立危险因素(OR=1.833,95%CI:1.573~1.982,P<0.05)。基线AOPP水平预测5年后DR进展的曲线下面积(AUC)为0.883(95%CI:0.842~0.924),敏感性和特异性分别为86.1%、91.9%。结论 AOPP可能是预测DR进展的生物标记物之一。

关键词：晚期氧化蛋白产物糖尿病视网膜病变生物标记物

Non-coding RNAs in acute ischemic stroke:from brain to periphery

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第1期20卷 116-129页

作者： Shuo Li Zhaohan Xu Shiyao Zhang Huiling sun Xiaodan Qin Lin Zhu Teng Jiang Junshan Zhou Fuling yan Qiwen Deng Department of Neurology Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu ProvinceChina Department of Neurology Zhongda HospitalSchool of MedicineSoutheast UniversityNanjingJiangsu ProvinceChina General Clinical Research Center Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu ProvinceChina

Acute ischemic stroke is a clinical emergency and a condition with high morbidity,mortality,and *** predictive,diagnostic,and prognostic biomarkers and effective therapeutic targets for acute ischemic stroke remain *** innovations in high-throughput gene sequencing analysis,many aberrantly expressed non-coding RNAs(ncRNAs)in the brain and peripheral blood after acute ischemic stroke have been found in clinical samples and experimental *** expressed ncRNAs in the post-stroke brain were demonstrated to play vital roles in pathological processes,leading to neuroprotection or deterioration,thus ncRNAs can serve as therapeutic targets in acute ischemic ***,distinctly expressed ncRNAs in the peripheral blood can be used as biomarkers for acute ischemic stroke prediction,diagnosis,and *** particular,ncRNAs in peripheral immune cells were recently shown to be involved in the peripheral and brain immune response after acute ischemic *** this review,we consolidate the latest progress of research into the roles of ncRNAs(microRNAs,long ncRNAs,and circular RNAs)in the pathological processes of acute ischemic stroke–induced brain damage,as well as the potential of these ncRNAs to act as biomarkers for acute ischemic stroke prediction,diagnosis,and *** from this review will provide novel ideas for the clinical application of ncRNAs in acute ischemic stroke.

关键词： acute ischemic stroke apoptosis blood–brain barrier damage circular RNAs excitatory toxicity long non-coding RNAs microRNAs neuroinflammation non-coding RNAs oxidative stress

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： Xiaodong yang Haochen Shen Xiaoming Xiao Zhichao Li Qi Zhou Wei yang Bin Jiang Yongli sun Luhong Zhang Zhenhua yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting