文献类型：会议论文

英文题名：Influence of Copper as a Co-catalyst of Potassium Hexaniobate Nanotubes on the Photocatalytic Hydrogen Evolution from a Methanol Aqueous Solution

作者：Zhao, Xueling[1];Yang, Xiaohui[1];Li, Xiangqing[2];Yao, Pingping[1];Kang, Shi-Zhao[2];Mu, Jin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Inst Technol, Dept Chem Engn, Shanghai 200235, Peoples R China

会议论文集：International Conference on Chemical Engineering and Advanced Materials

会议日期：MAY 28-30, 2011

会议地点：Changsha, PEOPLES R CHINA

语种：英文

外文关键词：Potassium Hexaniobate Nanotubes; Cu Co-catalyst; Photocatalysis; Hydrogen Evolution

摘要：In the presence of Cu2+ ions, the photocatalytic hydrogen evolution from a methanol aqueous solution was achieved when potassium hexaniobate nanotubes were used as the catalyst. It was found that there existed a photo-induced period in the initial reaction stage. Furthermore, the photo-induced period was prolonged by increasing the amount of Cu2+ ions. After that, the rate of hydrogen evolution was dramatically improved. Combined with the reaction phenomena and the result of the photocatalytic hydrogen evolution, it was deduced that the Cu2+ ions captured the photo-generated electrons of potassium hexaniobate nanotubes in the photo-induced period. Consequently, the Cu2+ ions were reduced and deposited on the potassium hexaniobate nanotubes. When the mass ratio of Cu to potassium hexaniobate nanotubes was 3 wt%, the rate of hydrogen evolution over the catalyst reached 21.9 mmol.g(-1).h(-1), which could almost match with Pt as a co-catalyst. These results showed that Cu was an effective alternative to Pt as a co-catalyst of potassium hexaniobate nanotubes for the photocatalytic hydrogen evolution from the methanol aqueous solution.