期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 3, 页码 3049-3059出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b02898
关键词
Photocatalytic water splitting; TiO2 inverse opal; Ti3+ self-doping; Photonic band gap; Slow photon effect; Solar light driven hydrogen evolution
资金
- Solar Energy Research Initiative, DST (Government of India)
- DST
- DBT
- CSIR
- KSCSTE
This work presents a photochemical and thermal treatment strategy to prepare in situ gold-platinum bimetallic nanoparticle-loaded titania photocatalysts with self-doped Ti3+ states (Au-Pt/Ti3+ nc-TiO2). In situ loading of Au-Pt bimetallic nanoparticles and Ti3+ self-doping in the TiO2 crystal lattice result in excellent solar light photocatalytic activity. The Au-Pt/Ti3+ nc-TiO2 displays an improved hydrogen evolution rate (98.53 mmol h(-1) g(-1)) when compared to in situ gold-loaded and in situ platinum-loaded titania (Au/Ti3+ nc-TiO2 and Pt/Ti3+ nc-TiO2, respectively) photocatalysts. The Au-Pt/Ti3+ nc-TiO2 photocatalyst is further restructured into titania inverse opal (Au-Pt/Ti3+ io-TiO2) photocatalyst by a facile colloidal photonic crystal (CPC) infiltration method. The Au-Pt/Ti3+ io-TiO2 photocatalyst displays a superior solar hydrogen evolution profile (181.77 mmol h(-1) g(-1)) compared to all the other photocatalysts investigated for hydrogen production experiments, which makes them potential candidates for solar water splitting.
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