TiO2-CuO/g-C3N4复合纳米材料合成及光催化还原CO2制CH3OH研究  

Synthesis of TiO-CuO/g-CN Composite Nanomaterials and Photocatalytic Reduction of CO

作　　者：何恩 谭正德[1] 赵雅丽 区泽堂 HE En;TAN Zheng-de;ZHAO Ya-li;QU Ze-tang(Callege of Materiae and Chemical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China)

机构地区：[1]湖南工程学院材料与化工学院,411104

出　　处：《湖南工程学院学报（自然科学版）》2020年第3期54-62,共9页Journal of Hunan Institute of Engineering(Natural Science Edition)

摘　　要：采用溶胶-凝胶法在不同分散介质中合成TiO2-CuO/g-C3N4复合纳米材料,并利用XRD、SEM、EDS、TEM、UV-Vis DRS、XPS对合成的三元催化剂进行表征.然后研究了紫外/可见光下TiO2-CuO/g-C3N4复合纳米材料对CO2光催化还原的催化效果,以及催化剂复合比、焙烧温度、催化剂用量和分散剂种类对催化剂还原CO2效率的影响.结果表明催化剂为不规整的块状堆积的结构,CO2还原产物以甲醇为主,并且最高产率可达0.702 mg/g/min.活性氧化物种捕获实验则进一步证明h+、e-及自由基为该催化剂还原CO2的主要因素.TiO2-CuO/g-C3N4 composite nanomaterials are synthesized by sol-gel method in different dispersion media. The synthesized three-way catalysts are characterized by XRD,SEM,EDS,TEM,UV-Vis DRS and XPS. We study the catalytic effect of TiO2-CuO/g-C3N4 composite nanomaterials on photocatalytic reduction of CO2 under UV/visible light irradiation as well as the effects of catalyst composite ratio,calcination temperature,catalyst amount,and type of dispersant on the CO2 reduction efficiency of the catalyst. The results show that the catalyst has irregular bulk stacking structure,methanol is the main reduction product of CO2 and the highest yield of reduced product methanol can reach 0.702 mg/g/min. It is concluded that h+,e-,and free radicals are the main factors for the reduction of CO2 by this catalyst.

关 键 词：溶胶-凝胶法 TiO2-CuO/g-C3N4 CO2还原 光催化还原 甲醇 

分 类 号：O614[理学—无机化学]