利用阳极氧化法制备了不同阳极氧化时间的TiO2纳米管,通过电化学方法将Cu2O沉积到TiO2纳米管表面。借助高分辨率场发射扫描电子显微镜(FE-SEM)、X射线衍射(XRD)和X射线光电子能谱分析(XPS)对复合催化剂Cu2O/TiO2进行了表征。利用自制的光电催化反应装置——“双池双界面反应器”进行复合催化剂Cu2O/TiO2在气-固界面光电还原CO2的研究。结果表明:催化产物为CH4和CO,催化产物中CH4含量最高时,可以达到1.678μL。CO含量最高时,可以达到11.499μL。催化产物中CO含量明显高于CH4含量,说明制备的复合催化剂Cu2O/TiO2-2对CO产物的生成选择性好。
TiO2 nanotubes with different anodic oxidation time were prepared by anodic oxidation method,and Cu2O was deposited on the surface of TiO2 nanotubes by electrochemical method.The composite catalyst Cu2O/TiO2 was characterized by FESEM,XRD and XPS.The photoelectric reduction of CO2 by Cu2O/TiO2 composite catalyst at gas-solid interface was studied by using a self-made photoelectricity catalytic reaction device-“double pool and double interface reactor”.The results showed that the catalytic products were CH4 and CO.The highest CH4 content in the catalytic products was 1.678μL.At its peak,CO can reach 11.499μL.The content of CO in the catalytic products was significantly higher than that of CH4,indicating that the prepared composite catalyst Cu2O/TiO2-2 had good selectivity for the generation of CO products.
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