期刊
NANO LETTERS
卷 14, 期 2, 页码 1038-1041出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl404688h
关键词
Water splitting; oxynitride; atomic-resolution STEM; surface reconstruction; acid etching
类别
资金
- Japan Society for the Promotion of Science (JSPS) [23000009, 25810112]
- Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST)
- Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)
- Council for Science and Technology Policy (CSTP) of the Cabinet Office of Japan
- international exchange program of A3 Foresight Program of JSPS
- MEXT, Japan [12024046]
- Grants-in-Aid for Scientific Research [25810112, 26289234, 23686093] Funding Source: KAKEN
LaTiO2N is an oxynitride photocatalyst that has ability to generate H-2 and O-2 from water under irradiation of light with wavelengths up to 600 nm. However, LaTiO2N necessitates sacrificial reagents that capture either photoexcited electrons or holes efficiently to be active in the photocatalytic reactions because of a considerable number of defects that cause trapping and recombination of photoexcited carriers. Therefore, identifying defect structures of LaTiO2N is important. In this study, using atomic-resolution scanning transmission electron microscopy, we evidence that eliminating defective surface reconstructed layers of LaTiO2N particles by the treatment with aqua regia can double the photocatalytic activity.
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