https://scholars.lib.ntu.edu.tw/handle/123456789/631253
標題: | Effects of Al Doping on Hydrogen Production Efficiency upon Photostimulated Water Splitting on SrTiO3Nanoparticles | 作者: | Rusevich, Leonid L. Kotomin, Eugene A. Zvejnieks, Guntars Kržmanc, Marjeta Maček Gupta, Suraj Daneu, Nina JEFFREY CHI-SHENG WU Lee, Yu Guan Wen-Yueh Yu |
關鍵字: | ELECTRONIC-STRUCTURE; DOPED SRTIO3; PHOTOCATALYTIC HYDROGEN; CHARGE SEPARATION; CRYSTALS; SURFACES; BATIO3; FACETS; DRIVEN; DFT | 公開日期: | 22-十二月-2022 | 出版社: | AMER CHEMICAL SOC | 卷: | 126 | 期: | 50 | 起(迄)頁: | 21223 | 來源出版物: | Journal of Physical Chemistry C | 摘要: | A noticeable improvement of hydrogen production upon photocatalytic water splitting was found recently experimentally on the faceted nanoparticles of strontium titanate (SrTiO3, STO). In this paper, we study experimentally and theoretically the effects of the Al doping on the electronic structure, optical properties, and hydrogen production efficiency. It is demonstrated here that Al doping significantly increases the photoactivity in water splitting. The preparation of Al-doped STO photocatalysts in molten KCl with further optimization of the synthesis procedure and co-catalyst deposition is a cheaper and lower-synthesis-temperature alternative to SrCl2molten salt system. In turn, the first-principles calculations of the dopant in the bulk and at the surface show that doping does not considerably affect the band gap (in full accordance with our experimental data) but leads to photostimulated mobile hole trapping at local energy levels close to the valence band top which likely prevents the electron-hole recombination and thus stimulated hydrogen reduction. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/631253 | ISSN: | 19327447 | DOI: | 10.1021/acs.jpcc.2c05993 |
顯示於: | 化學工程學系 |
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