期刊
JOURNAL OF POWER SOURCES
卷 376, 期 -, 页码 11-17出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2017.11.067
关键词
Mixed-phase TiO2; Interface; Heterojunction; Water splitting
资金
- National Science Foundation of China
- Ministry of Education, China [11374091, 11574076, 11274100, 11674087, 51602094, 20134208110005]
In recent years, production of H-2 through photocatalytic water splitting has attracted considerable attention in the chemistry and material fields. In this work, TiO2 based heterojunction photocatalyst, which is consisted of rutile nanorods and anatase nanoparticles, is systematically studied by controlling the HCl concentration in hydrothermal process. With the help of loaded Pt, an interesting two-peak feature (M shape) is observed in the HCl-dependent H-2 production efficiency. The peak values are 54.3 mmol h(-1) g(-1) and 74.4 mmol h(-1) g(-1), corresponding to 83.9% and 12% anatase phase, respectively. A detailed analysis based on the microstructure and photoluminescence (PL) spectra indicate that the M shape feature is directly linked to the HCl-controlled interface area. Moreover, an unexpected zero interface area is revealed at an intermediate HCl concentration. In terms of homogeneous and heterogeneous nucleations, an interface growth mechanism is proposed to clarify its HCl-sensitive character. This work provides a route to enhance the photocatalytic activity in TiO2 based photocatalyst via increasing the interface area.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据