Cu_2O/TiO_2-Bi_2WO_6三元复合催化剂的制备及光催化性能研究  

Preparation and Photocatalytic Activity of Cu_2O/TiO_2-Bi_2WO_6 Ternary Composite Catalyst

作　　者：郑先君[1] 陈萍萍 赵梦[1] 魏丽芳[1] 王焕新[1] ZHENG Xian-jun;CHEN Ping-ping;ZHAO Meng;WEI Li-fang;WANG Huan-xin(School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)

机构地区：[1]郑州轻工业学院材料与化学工程学院,郑州450002

出　　处：《人工晶体学报》2018年第10期2177-2183,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21471136);郑州轻工业学院研究生科技创新基金项目(2017006)

摘　　要：采用水热法制备花状Bi_2WO_6,并利用超声分散法制备了Cu_2O/TiO_2-Bi_2WO_6复合光催化剂,通过FESEM、XRD、XPS、FI-IR、UV-vis DRS和PL对光催化剂进行了分析和表征。表征结果证明:花状Bi_2WO_6表面负载着碎片状的Ti O2和立方体Cu2O形成Cu_2O/TiO_2-Bi_2WO_6复合光催化剂;以短链脂肪酸(SCFAs)为牺牲剂,考察复合光催化剂的光催化产生氢气和烷烃的性能。实验结果表明:Cu_2O/TiO_2-Bi_2WO_6复合光催化剂以乙酸为牺牲剂,主要产氢气和甲烷,降解率高达91. 82%;以丙酸为牺牲剂,产物主要是乙烷和丁烷,降解率高达90. 70%;以丁酸为牺牲剂,除了氢气,甲烷,乙烷,丙烷,丁烷外,气体产物还含有一定量的戊烷,其降解率高达91. 50%。结合反应液中间产物的成分进行检测,由此推断出光催化反应的可能机理。A flower-like Bi 2WO 6 was prepared by a hydrothermal method and Cu 2O/TiO 2-Bi 2WO 6 composite photocatalyst was prepared by ultrasonic dispersion.The photocatalyst was analyzed and characterized by FESEM,XRD,XPS,FI-IR,UV-vis DRS and PL.The characterization results of Cu 2O/TiO 2-Bi 2WO 6 composite photocatalyst show that fragmentary TiO 2 and cubic Cu 2O were supported on the flower-like Bi 2WO 6 surface.The photocatalytic activity of hydrogen and alkane of complex photocatalyst was investigated using short-chain fatty acid as sacrificial agent.The results show that Cu 2O/TiO 2-Bi 2WO 6 composite photocatalysts mainly produced hydrogen and methane when acetic acid selected as sacrificial agent,and the degradation rate of acetic acid was up to 91.82%.The propionic acid using as sacrificial agent,the gas mainly was ethane and butane and the degradation rate of propionic was up to 90.70%.With butyric acid as a sacrificial agent,in addition to hydrogen,methane,ethane,propane,butane and the produced gases also contain pentane,the degradation rate was up to 91.50%.The composition of the intermediate product of the reaction solution was detected to infer the possible mechanism of the photocatalytic reaction.

关 键 词：Cu2O/TiO2-Bi2WO6 SCFAs 氢气 烷烃 

分 类 号：O643[理学—物理化学]