期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 11, 期 1, 页码 141-148出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta08076a
关键词
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资金
- National Natural Science Foundation of China [21925206, 22279138]
- Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences [XDA 21000000]
- JSPS [JP22H05148, JPJSCCA20200004]
A novel strategy of first nitridation and subsequent calcination post-treatment methods was developed to prepare N,F-codoped TiO2 photocatalysts. The prepared sample exhibited efficient band-to-band absorption and improved water oxidation performance by reducing defect concentrations. It also showed good visible-light-driven water reduction and CO2 reduction activities.
To efficiently utilize solar energy and catalyze the water splitting reaction under visible-light, a novel strategy of first nitridation and subsequent calcination post-treatment methods is developed to prepare N,F-codoped TiO2 (TNOF) photocatalysts in this work. The prepared sample exhibits obvious band-to-band absorption with an edge up to ca. 580 nm. After calcinating the nitrided sample at low temperature in air, the Ti3+ defects, which could trap photo-generated electrons during photocatalysis, would be significantly reduced. Under visible-light irradiation, the TNOF photocatalyst presents excellent water oxidation performance in AgNO3 aqueous solution or Fe3+ reversible electron acceptor. Based on the obtained TNOF sample, an efficient Z-scheme water overall splitting system is successfully constructed combining with a known Ru/SrTiO3:Rh H-2-evolution photocatalyst. Moreover, the TNOF photocatalysts also show good visible-light-driven water reduction and CO2 reduction activities. This work presents a novel strategy to prepare nitrogen-incorporated oxide photocatalysts with low defect concentrations for photocatalytic applications.
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