漂浮型BiOCl_(0.6)I_(0.4)/GO光催化剂的制备及其除藻性能  

Preparation of floating BiOCl_(0.6)I_(0.4)/GO photocatalyst and its algae removal performance

作　　者：杨留留 刘宏 陈厚望 陈猛 张鹏 YANG Liu-liu;LIU Hong;CHEN Hou-wang;CHEN Meng;ZHANG Peng(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009

出　　处：《中国环境科学》2021年第10期4633-4644,共12页China Environmental Science

基　　金：国家自然科学基金青年基金(51708381);江苏省自然科学基金项目面上项目(BK20181466);江苏省苏州市科技局民生科技项目(SS2019028);苏州市生态环保局环保项目(B201903)。

摘　　要：通过以膨胀珍珠岩(EP)为载体,水浴加热原位合成漂浮型BiOCl_(0.6)I_(0.4)/GO光催化剂,并研究其在可见光下对铜绿微囊藻的去除效果.利用X射线衍射(XRD)、扫描电镜(SEM)、傅里叶红外光谱(FT-IR)、紫外可见漫反射光谱(UV-Vis DRS)、X射线能谱(XPS)等方法对合成样品的组成和形貌结构进行了表征.结果显示,BiOCl_(0.6)I_(0.4)/GO/EP复合材料比BiOCl_(0.6)I_(0.4)/EP和GO/EP具有更强的光催化除藻效果,且在4次循环使用之后仍有较好的光催化活性.此外,自由基捕获实验证明光催化反应中光生空穴(h^(+))是藻类失活的主要活性物质.最后,根据能带分析和自由基捕获试验提出BiOCl_(0.6)I_(0.4)/GO/EP复合材料的反应机理.Using expanded perlite(EP)as a floating carrier,the BiOCl_(0.6)I_(0.4)/GO photocatalyst was synthesized by water bath method and its removal efficiency on Microcystis aeruginosa under visible light was investigated as well.The composition and morphology of synthesized samples were characterized by XRD,SEM,FTIR spectra,UV-Vis DRS and XPS.Results indicated that the synthesized BiOCl_(0.6)I_(0.4)/GO/EP composite showed better algae removal performance than that of BiOCl_(0.6)I_(0.4)/EP and GO/EP.Even after four cycles reuse,the composite still showed better photocatalytic activity.Furthermore,free radical capture experiment proved that photo-generated holes(h+)were the main active species for the inactivation of algae in photocatalytic process.Finally,according to the energy band analysis and free radical capture experiment,the mechanism of BiOCl_(0.6)I_(0.4)/GO/EP composite was proposed.

关 键 词：BiOCl_(0.6)I_(0.4)/GO 可见光 光催化 藻类去除 

分 类 号：X703[环境科学与工程—环境工程]