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新型Ag-BiVO4电极的光电催化性能研究 预览

Study of Photoelectron Catalysis Properties of Ag Doped BiVO4 Electrode
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摘要 通过金羁沉积法以三异丙醇氧钒(C9H21O4V)为啄料制备掺杂AgBiVO4电极材料,采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、X射线光电子能谱分析(XPS)、循环伏安(CV)等对其物理结构和性质进行了初步表征.在紫外光(A≤390nm,10w)条件下,以AgBiVO4为阳极电极,以大剂量染料罗丹明B(RhB,400mL1.3×10^5mol/L)溶液为探针分子,考察其对有毒有机污染物的光电催化去除性能,结果发现与单纯光催化或电催化降解RhB效率相比,其光电催化降解速率得到了显著的提高,这与光生电子更易导向外电路和Ag粒子生成抑制了光生空穴的复舍有关.此外,考察了AgBiVO。电极的涂抹量、Ag负载量及电压值对降解实验的影响,结果表明当BiVO4涂抹量为4×10^6 mo1/cm2,Ag负载量为4×10^6mol/cm2,实验电压为2.5V,反应时间为3h时,对高浓度RhB的效率可达到64.6%. Ag BiVO4 film electrode is prepared using vanadyl method. T py (SEM) he structures and properties of Ag BiVO4 electrode are propoxide (C9 H24 O4V) by metal deposition characterized by scanning electron microsco Under ultraviolet (λ≤390nm) irradiation, the photoelectron catalytic degradation of rhodamine B (RHB) with high concentration using Ag BiVO4 anode is examined. The photoelectron catalytic properties of toxic or ganic pollutants are studied. Compared with photocatalytic or electrocatalytic process, photoelectrocatalytic activity of Ag BiVO4 is significantly promoted, which results from the availability of photo generated elec trons transferring, and the recombination and photo generated is hindered due to the generation of Ag patti cles. Additionally, the influence of electrode coating amount, Ag loading amount and voltage change on the experiment is also studied. The optimum conditions are as follows: Amount of BiVO4 coated is 4X 10^6 mol/ cm2; loading Ag is 4)〈10 ^-6 mol/cm2; the experimental voltage is 2.5V, where the RhB degradation rate can reach 64.6% at 3h.
作者 周奥 任智勇 黄应平 方艳芬 Zhou Ao ,Ren Zhiyong, Huang Yingping, Fang Yanfen (1. College of Biology & Pharmaceutical, China Three Gorges Univ. , Yichang 443002, China; 2. Hubei Col laborative Innovation Center for Geo Hazards & Eco Environment in Three Gorges Area, China Three Gor ges Univ. , Yichang 443002, China;3. Engineering Research Center of Eco environment in Three Gorges Res ervoir Region of Ministry of Education, China Three Gorges Univ. , Yichang 443002, China)
出处 《三峡大学学报:自然科学版》 CAS 北大核心 2018年第3期102-107,共6页 Journal of China Three Gorges University(Natural Sciences)
基金 国家自然科学基金(201577078,20167708G) 湖北省创新群体滚动项目(2015CFA021)
关键词 BIVO4 AG掺杂 光电催化 降解 BiVO4 Ag doping photoelectric catalysis degradation
作者简介 方艳芬(1982-)。女。副教授。博士。主要研究方向为水污染控制.Email:chemctgu@126.com
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