CdS基纳米异质结可见光产氢催化剂的制备及性能

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• 英文论文题名：CdS-Based Nano-heterostructure photocatalysts for Efficient Photocatalytic Hydrogen Generation under Visible Light Irradiation
• 论文作者：尹兴良 ; 胡劲松
• 英文论文作者：Xing-Liang Yin ; Jin-Song Hu ; Institute of Chemistry ; Chinese Academy of Sciences
• 年：2016
• 作者机构：中国科学院化学研究所;
• 论文关键词：硫化镉 ; 异质结 ; 可见光 ; 光解水 ; 产氢
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
• 语种：中文
• 分类号：O643.36;TQ116.2
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：104k
• 原文格式：D
• 会议级别：全国

摘要

硫化镉是一种带宽窄且带边位置适宜的光解水产氢半导体催化剂。1,2但由于光生电子-空穴的快速复合,纯硫化镉即使在牺牲剂存在下催化产氢活性也比较低。为了解决上述问题,我们合成制备了MoS_2/CdS,CdS/SrTiO3二元和Z-Schem结构的CdS@Au/WO_3三元纳米异质结结构催化剂。该系列催化剂所形成的异质结结构加速了光生电子、空穴的分离,且催化剂为纳米尺度,大大缩短了载流子的传输路径,因此所制备的催化剂表现出优异的催化产氢活性。尤其是纳米片-棒结构的MoS_2/CdS催化剂,其催化产氢的活性高达49.80 mmol/g/h,是目前报道的该类催化剂和CdS-贵金属类催化剂中产氢活性最高的。
Cadmium Sulfide(Cd S), as a semiconductor-based photocatalyst has been widely applied for solar driven H_2 generations due to its narrow band gap(Eg=2.4 e V) and suitable band edge energetics. 1,2However, the photocatalytic activity of Cd S itself toward water splitting is still very low even with the assist of scavenger because of high-rate charge recombination. To solve this problem, we synthesized Mo S_2/CdS and CdS/SrTiO_3 binary and Z-Schem structural CdS@Au/WO_3 ternary nano-heterostructure. The heterostructure formed for the catalysts as fabricated accelerates the photoexited charges separation. Besides that, the charges radial transfer path was shorted owing to their nanoscale. As a result, the catalysts as fabricated exhibited high performance on hydrogen evolution. Especially, MoS_2/CdS nanosheets-on-nanorod heterostructure exhibits a state-of-the-art H_2 evolution rate of 49.80 mmol g~(-1) h~(-1), which is the state-of-the-art performance among all MoS_2/Cd S composites and Cd S-noble metal photocatalysts.

引文

[1]Yin,X.;Liu,J.;Jiang,W.;Zhang,X.;Hu,J.;Wan,L.Chem.Commun.2015,51:13842.
    [2]Yin,X.;Li,L.;Jiang,W.;Zhang,Y.;Zhang,Y.;Hu,J.;Wan,L.Submitted.