Synthesis of a Ga-doped La5Ti2Cu0.9Ag0.1O7S5 photocatalyst by thermal sulfidation for hydrogen evolution under visible light
文献类型：期刊论文
| 作者 | Pan, Zhenhua; Xiao, Qi; Chen, Shanshan; Wang, Zheng; Lin, Lihua; Nakabayashi, Mamiko; Shibata, Naoya; Takata, Tsuyoshi; Hisatomi, Takashi; Domen, Kazunari |
| 刊名 | JOURNAL OF CATALYSIS
 |
| 出版日期 | 2021-07 |
| 卷号 | 399页码:230-236 |
| 关键词 | Oxysulfide Photocatalysis Cocatalyst Water splitting |
| ISSN号 | 0021-9517 |
| 英文摘要 | Ga-doped La5Ti2Cu0.9Ag0.1O7S5 absorbs visible light up to 710 nm and can serve as a H-2 evolution photocatalyst in Z-scheme water splitting systems. This material is typically obtained in the form of rod-like particles that exhibit one-dimensional conductivity along their long axis. However, these relatively long particles (10-20 mm) require charge carriers migrate over significant distances to participate in photocatalytic reactions, which limits reaction efficiency. In the present study, Ga-doped La5Ti2Cu0.9Ag0.1O7S5 particles approximately 2 mu m in length were prepared by thermal sulfidation. The as-formed particles had rodlike morphology but contained a lot of burrs that could be eliminated by annealing in the presence of sulfur vapor. Rh cocatalyst particles could be deposited on the tips of these particles in a dense, widely dispersed manner by stepwise impregnation-reduction and post-photodeposition. These treatments enhanced the photocatalytic H-2 evolution activity of the Ga-doped La5Ti2Cu0.9Ag0.1O7S5 particles in aqueous solutions containing electron donors by a factor of seven and increased the apparent quantum efficiency of the process to 3.1% at 420 nm. This work demonstrates that thermal sulfidation is an effective approach to reducing the particle size of an oxysulfide photocatalyst. With appropriate post-treatment and cocatalyst loading processes, such photocatalysts can efficiently evolve hydrogen from aqueous solutions. (C) 2021 Elsevier Inc. All rights reserved. |
| WOS研究方向 | Chemistry, Physical ; Engineering, Chemical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45626]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Lab Atmospher Environm & Pollut Control, Beijing 100085, Peoples R China 2.Chuo Univ, Fac Sci & Technol, Dept Appl Chem, Bunkyo Ku, 1-13 Kasuga, Tokyo 1128551, Japan 3.Univ Tokyo, Off Univ Prof, Bunkyo Ku, 2-11-16 Yayoi, Tokyo 1138656, Japan 4.Univ Tokyo, Inst Engn Innovat, Bunkyo ku, 2-11-16 Yayoi, Tokyo 1138656, Japan 5.Shinshu Univ, Res Initiat Supra Mat, 4-17-1 Wakasato, Nagano, Nagano 3808553, Japan |
| 推荐引用方式 GB/T 7714 | Pan, Zhenhua,Xiao, Qi,Chen, Shanshan,et al. Synthesis of a Ga-doped La5Ti2Cu0.9Ag0.1O7S5 photocatalyst by thermal sulfidation for hydrogen evolution under visible light[J]. JOURNAL OF CATALYSIS,2021,399:230-236. |
| APA | Pan, Zhenhua.,Xiao, Qi.,Chen, Shanshan.,Wang, Zheng.,Lin, Lihua.,...&Domen, Kazunari.(2021).Synthesis of a Ga-doped La5Ti2Cu0.9Ag0.1O7S5 photocatalyst by thermal sulfidation for hydrogen evolution under visible light.JOURNAL OF CATALYSIS,399,230-236. |
| MLA | Pan, Zhenhua,et al."Synthesis of a Ga-doped La5Ti2Cu0.9Ag0.1O7S5 photocatalyst by thermal sulfidation for hydrogen evolution under visible light".JOURNAL OF CATALYSIS 399(2021):230-236. |
入库方式： OAI收割
来源：生态环境研究中心
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