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Chinese Journal of Chemistry 2024年第20期42卷 2445-2452页

作者： xue-feng Cheng Qiang Cao qing Liu Hao-Yu Zhang qing-feng xu Jian-Mei Lu College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhouJiangsu 215123China

Electrocatalysis technology can effectively promote the hydrodechlorination of chloramphenicol(CAP)to reduce the ***,there are still some challenges such as low degradation rate and poor ***,we prepared porous N,O co-doped carbon supported Pd nanoparticles composites(Pd NPs/NO-C)for electrocatalytic degradation of *** doping of N and O not only effectively enhanced the interaction between substrate and CAP,promoting the mass transfer process,but also enhanced the anchoring effect on Pd nanoparticles,avoiding the occurrence of *** prepared composites achieved removal efficiency of CAP over 99%within 1 h,and the rate constant was as high as 6.72 h^(–1),outperforming previous reported ***,Pd NPs/NO-C composites showed a wide range of pH tolerance,excellent ion interference resistance and long-term *** work unravels the importance of mass transfer processes in solution to electrocatalytic hydrodechlorination and provides new research ideas for catalysts design.

关键词： Chloramphenicol Hydrodechlorination Electrocatalysis N,O co-doped carbon Mass transfer Supported catalysts Nanoparticles Low-dimensionalmaterials

AIEgens-lightened Functional Polymers: Synthesis, Properties and Applications

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Chinese Journal of Polymer Science 2019年第4期37卷 302-326,I0005页

作者： Shi-Yuan Zhou Hai-Bo Wan feng Zhou Pei-Yang Gu qing-feng xu Jian-Mei Lu College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University

Recently, polymers with aggregation-induced emission(AIE) effects have attracted significant attention due to their broad applications in luminescence sensors, stimuli responsive materials, electroluminescence devices, etc. In this review, we summarize recent advances concerning AIE polymers. Four types of AIE polymers including end-functionalized polymers, side-chain polymers, main-chain polymers, and other polymers according to the location of AIEgens, are described. Their synthetic preparation, optical property, AIE effects, and applications are also illustrated in this review.

关键词： Aggregation-induced emission Functional polymers Synthetic method Application

One-dimensional π-d conjugated coordination polymers: synthesis and their improved memory performance

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Science China Chemistry 2019年第6期62卷 753-760页

作者： xue-feng Cheng Jie Li Xiang Hou Jin Zhou Jing-Hui He Hua Li qing-feng xu Na-Jun Li Dong-Yun Chen Jian-Mei Lu College of Chemistry Chemical Engineering and Materials Science Soochow University Shanghai Institute of Measurement and Testing Technology

Multilevel resistance random access memories(RRAMs) are intensively studied due to their potential applications in high density information storage. However, the low ternary device yields and high threshold voltages based on current materials cannot meet the requirement for applications. Improvement via material innovation remains desirable and challenging. Herein,five one-dimensional conjugated coordination polymers were synthesized via the reaction between metal ions(Zn^(2+), Cu^(2+), Ni^(2+),Pt^(2+) and Pd^(2+)) and 2,5-diaminobenzene-1,4-dithiol(DABDT) and fabricated into RRAM devices. The as-fabricated ternary memories have relatively low threshold voltages(V_(th1):-1 to-1.4 V, V_(th2):-1.8 to-2.2 V). Their ternary device yields were improved from 24% to 56%. The first and the second resistance switches are interpreted by the space charge limited current(SCLC) and grain boundary depletion limited current(GBLC) modes, respectively. The Pd-DABDT, which is of planar structure,smaller band gap and better crystallinity than others, shows the best performance among these five polymers. Our work paves a simple and efficient way to optimize the performance of ternary RRAM devices employing one-dimensional hybrid materials.

关键词： one-dimensional coordination polymer resistive random access memory ternary device yield low threshold voltages d-π conjugation

基于无损检测与木材力学性能相关性的既有木构件剩余抗弯承载力研究（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2015年第7期16卷 541-550页

作者： Jin ZHANG qing-feng xu Yi-xiang xu Ming ZHANG Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education Southeast University Shanghai Key Laboratory of New Technology Research on Engineering Structure Shanghai Research Institute of Building Sciences Department of Civil Engineering Strathclyde University

目的:利用无损检测的方法,定量评估经腐朽和虫蛀后的既有木构件的剩余抗弯承载力。方法:1.通过对木材小试件进行阻抗仪检测试验和材性试验,建立木材阻力值与抗压/抗拉强度之间的线性回归方程;2.对大段木梁试件进行阻抗仪检测试验,基于... 详细信息

目的:利用无损检测的方法,定量评估经腐朽和虫蛀后的既有木构件的剩余抗弯承载力。方法:1.通过对木材小试件进行阻抗仪检测试验和材性试验,建立木材阻力值与抗压/抗拉强度之间的线性回归方程;2.对大段木梁试件进行阻抗仪检测试验,基于木材阻力值与抗压/抗拉强度之间的关系,计算得到大段木梁各部分的强度值;3.在Abaqus中对既有木梁的初始缺陷进行模拟并将木梁的计算强度值赋予木梁的各个部分,综合分析木梁的剩余抗弯承载力。结论:1.木材小试件的阻力值与抗压/抗拉强度值之间呈现出显著的相关性,各测点处的木材强度值可通过阻力值计算得到;2.虫蛀、木节和裂缝等初始缺陷对试件的破坏形式和极限荷载影响显著;3.非线性仿真分析所得的结果与试验结果基本吻合。

关键词：既有木构件无损检测力学试验剩余抗弯承载力

Lead-free perovskite MASnBr3-based memristor for quaternary information storage

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InfoMat 2020年第4期2卷 743-751页

作者： Wen-Hu Qian xue-feng Cheng Jin Zhou Jing-Hui He Hua Li qing-feng xu Na-Jun Li Dong-Yun Chen Zhi-Gang Yao Jian-Mei Lu National United Engineering Laboratory of Functionalized Environmental Adsorption Materials College of ChemistryChemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhouChina Testing and Analysis Center Soochow UniversitySuzhouChina

Memristors are a new type of circuit element with a resistance that is tunable to discrete levels by a voltage/current and sustainable after removal of power,allowing for low-power computation and multilevel information *** organic-inorganic lead perovskites are reported to demonstrate memristive behavior,but few have been considered for use as a multilevel memory;also,their potential application has been hindered by the toxicity of lead *** this article,lead-free perovskite MASnBr3 was utilized in memristors for quaternary information *** tin oxide(ITO)/MASnBr3/Au memristors were fabricated and showed reliable memristive switching with well-separated ON/OFF states of a maxima resistance ratio of 102 to *** importantly,four resistive states can be distinguished and repeatedly written/read/erased with a retention time of 104 seconds and an endurance of 104 *** investigating the current-electrode area relationship,Br distribution in the ON/OFF states by in situ Raman and scanning electron microscopy,and temperaturedependent current decay,the memristive behavior was explicitly attributed to the forming/breaking of conductive filaments caused by the migration of Br−under an electric *** addition,poly(ethylene terephthalate)-ITO/MASnBr3/Au devices were found to retain their multiresistance state behavior after being bent for 1000 times,thus demonstrating good device *** results will inspire more lead-free perovskite work for multilevel information storage,as well as other memristor-based electronics.

关键词： MASnBr3 memristor perovskite resistive memory RRAM

Dendrowardol C, a novel sesquiterpenoid from Dendrobium wardianum Warner

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Natural Products and Bioprospecting 2013年第3期3卷 89-92页

作者： Wei-Wei FAN feng-qing xu Fa-Wu DONG Xiao-Nian LI Yan LI Yu-qing LIU Jun ZHOU Jiang-Miao HU State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences Beijing 100049China

Dendrowardol C(1)-a novel sesquiterpenoid,with an unprecedented 4/5/6/6 tetracyclic carbon backbone,together with two known cyclopacamphane-type sesquiterpenoids;dendronobilin I(2)and dendrobane A(3)were isolated from the stems of Dendrobium wardianum *** structure of 1 was established on the basis of spectroscopic data and the absolute configuration was determined by single-crystal X-ray diffraction *** hypothetical biosynthetic pathway of 1 was *** 1 showed no cytotoxic activity against human tumor cell lines HL-60,SMMC-7721,A-549,MCF-7,and SW480.

关键词： Dendrobium wardianum Warner sesquiterpenoid dendrowardol X-ray

Rough Integrals Generated by Function Rough Sets

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Chinese Quarterly Journal of Mathematics 2011年第2期26卷 296-299页

作者： YU Xiu-qing xu feng-sheng Department of Mathematics Dezhou College Dezhou 253014 China

The concepts of the lower approximation integral,the upper approximation integral and rough integrals are given on the basis of function rough *** on these concepts,the relation of the lower approximation integrals,the relation of the upper approximation integrals,the relation of rough integrals,and the double median theorem of rough integrals are *** integrals have finite contraction characteristic and finite extension characteristic.

关键词： function rough sets the lower approximation integral the upper approximation integral rough integrals

Chemical components of Dendrobium crepidatum and their neurite outgrowth enhancing activities

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Natural Products and Bioprospecting 2013年第2期3卷 70-73页

作者： Cheng-Bo LI Cong WANG Wei-Wei FAN Fa-Wu DONG feng-qing xu Qin-Li WAN Huai-Rong LUO Yu-qing LIU Jiang-Miao HU Jun ZHOU State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences Beijing 100049China

15 compounds,including two new ones crepidatuols A(1)and B(2)were isolated from the stems of Dendrobium *** planar structures of these compounds were elucidated by spectroscopic methods(NMR,MS,UV,and IR)and comparison with those from literatures.10 compounds were send for enhancing activities on nerve growth factor(NGF)medicated neurite outgrowth in PC12 cells and the results indicated that crepidatuol A(1),confusarin and 3-(2-acetoxy-5-methoxy)-phenylpropanol showed enhancing activities at the concentration of 10.0μM.

关键词： Orchidaceae Dendrobium crepidatum bibenzyl neurite outgrowth enhancing activity

Epidemiology of pterygium in aged rural population of Beijing, China

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Chinese Medical Journal 2010年第13期123卷 1699-1701页

作者： LIANG qing-feng xu Liang JIN Xiu-ying YOU Qi-sheng YANG Xiao-hui and CUI Tong-tong Beijing Institute of Ophthalmology Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing 100005 China

Background Pterygium is a common ophthalmic disease and an important public health problem. It may be affected by many factors such as age, gender, ultraviolet radiation exposure, and time spent outdoors. This study aimed to investigate the prevalence of pterygium and evaluate the risk factors for the development of pterygium in the aged rural population of Beijing. Methods The investigation is a population-based cross-sectional study. Participants from 198 villages of 13 suburban districts, aged 55-85 years old, were invited to complete a medical record, and 37 067 individuals were taken external ocular and fundus photos at Beijing ocular disease survey in 2008-2009. The information was uploaded by Internet and diagnosed with stages and grades by ophthalmological specialists. The prevalence, stages and grades of pterygia were observed. Results Of the 37 067 individuals, 1395 （3.76%） had pterygium. There was a significantly higher prevalence in male （5.13%） than in female （3.17%, P=0.000）. The prevelence rate increased obviously with ages （X2=7.939, P=0.019） in rural Beijing. The average prevalence of 5.91% in Daxing and Fangshan districts with low latitude and low precipitation was significantly higher than that in Miyun and Huairou districts with high latitude and deep precipitation （3.17%, P=-0.000）. The majority of the pterygia （43.5%） were in active stage and 46.5% pterygia involved pupil area corneas. Conclusions There is a statistically significant association between latitude and precipitation of habitation region and pterygium formation. Solar radiation, especially ultraviolet exposure represents a significant environment hazard to pterygium development.

关键词： pterygium prevalence Beijing, peasant

F-Rough Integrals and Its Measurements

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Chinese Quarterly Journal of Mathematics 2011年第3期26卷 440-444页

作者： YU Xiu-qing xu feng-sheng HAN Zhong-yue Department of Mathematics Dezhou University Dezhou 253023 China

F-rough integrals is defined on the basis of the dual of function one direction S-rough sets,which has dynamic *** F-rough integrals,the concepts of expansion measurement-expansion degree and expansion ratio are *** expansion degree and expansion ratio the changing extent can be expressed with numbers,and the recognition principle of attribute effect on function equivalences is got.

关键词： F-rough integrals dynamic characteristics measurement