作者机构：
[Wang, Q; Hu, Yunchu; Zhou, Cunyin; Huang, Juan; Wang, Wenlei; Wang, Qiong; Tang, Hao] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;[Wang, Q; Wang, Qiong] Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ, Changsha 410081, Peoples R China.
通讯机构：
[Wang, Q ] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ, Changsha 410081, Peoples R China.
关键词：
Key words MOFs-based materials;photoelectrochemical sensing interface;photoelectrochemical sensing analysis
摘要：
Photoelectrochemical sensing analysis is a rapidly developing new analytical technology in recent years, and photoelectric active materials are the key to photoelectrochemical sensing detection. Metal-organic frameworks (MOFs) and their derivatives may be ideal carriers for the construction of photoelectrochemical sensing interfaces by dispersing photoelectrically active substances. Due to the "antenna effect" of organic ligands in MOFs, the metal clusters can be regarded as activated discrete semiconductor quantum dots, giving them photoelectric properties similar to those of semiconductors. The modification of MOFs materials with carbon-based compounds, organic polymers, noble metal nanoparticles, inorganic oxides, and quantum dots, and the construction of MOFs-based photoelectrochemical sensing interfaces, can improve the electrical conductivity of MOFs, promote the separation of photogenerated electrons-holes, and thus improve the photoelectric conversion efficiency. The MOFs-based photoelectrochemical sensing interfaces amplify the signal generated by photoelectrochemical sensing, enabling ultra-sensitive detection of the target object. Based on these, this study provides a detailed introduction to the photoelectric activity mechanism, synthesis methods, and strategies for constructing photoelectric activity interfaces of MOFs-based materials. The applications of MOFs-based materials in photoelectrochemical sensing detection of small molecule compounds, immunoassay, enzyme activity and environmental analysis in recent years have been comprehensively reviewed. Finally, current challenges and future perspectives in this field are also proposed.
作者机构：
[马强; 李水芳; 文瑞芝] College of Science, Central South University of Forestry & Technology, Changsha, 410004, China;[付红军; 王琼] College of Food Science and Engineering, Central South University of Forestry & Technology, Changsha, 410004, China
期刊：
Journal of Mathematical Control Science and Applications,2018年4(2):137-148 ISSN：0974-0570
作者机构：
[Wang Q.; Zhang L.] School of Mathematical Science and Computing Technology, Central South University, Changsha, Hunan 410075, China;Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha, Hunan 410004, China;[Dai B.] School of Mathematical Science and Computing Technology, Central South University, Changsha, Hunan 410075, China<&wdkj&>Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
关键词：
Leggett-Williams fixed point theorem;Neutral functional differential equation;Periodic solution
作者机构：
[胡云楚; 王文磊; 陈秋菊; 王琼] School of Science, Central South University of Forestry and Technology, Changsha, 410004, China;[马莉萍; 谢奇龙] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
摘要：
Aqueous complexes between ferric (Fe(III)) and arsenate (As(V)) are indispensable for understanding the mobility of arsenic (As) in Fe(III)-As(V)-rich systems. In this study, aqueous Fe(III)-As(V) complexes, FeH2AsO42+ and FeHAsO4+, were postulated based on the qualitative analysis of UV-Vis spectra in both Fe(III)-As(V)-HClO4 and Fe(III)-As(V)-H2SO4 systems. Subsequently, monodentate structures were evidenced by Fe K-edge EXAFS and modeled as [FeH2AsO4(H2O)(5)](2+) and [FeHAsO4(H2O)(5)](+) by DFT. The feature band at similar to 280 nm was verified as electron excitation chiefly from Fe-As-bridged O atoms to d-orbital of Fe in [FeH2AsO4(H2O)(5)](2+) and [FeHAsO4(H2O)(5)](+). The structural and spectral information of Fe(III)-As(V) complexes will enable future speciation analysis in Fe(III)-As(V)-rich system. (C) 2017 Published by Elsevier Ltd.
作者机构：
[文瑞芝; 黄自知; 马强; 王琼; 胡云楚] College of Science, Central South University of Forestry & Technology, Changsha, 410004, China;[Zeng D.] Hunan Center of Disease Control and Prevention, Changsha, 410005, China
通讯机构：
College of Science, Central South University of Forestry & Technology, Changsha, China
作者机构：
[Wang, Qi] Cent S Univ, Sch Math Sci & Comp Technol, Changsha 410075, Hunan, Peoples R China.;[Dai, Binxiang] Cent S Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Dai, Binxiang] C;Cent S Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China.
关键词：
Neutral population model;finite and infinite delays;k-set contractive operator;positive periodic solution
摘要：
In this paper, by using the theory of abstract continuous theorem of k-set contractive operator and some analysis techniques, we obtain some sufficient conditions for the existence of positive periodic solutions for a neutral population model.
