祝贺冯宁东在 Journal of Physical Chemistry C上发表文章
日期:2021/6/10 16:51:12 浏览量:次
Abstract
To obtain efficient photocatalytic activity on a hybrid composite, facile transfer of photogenerated carriers at the hybrid interface and their rapid reaction with redox species on different components of a photocatalyst play two significant roles. Here, titanium hydroxide as a precursor instead of synthesized TiO2 was mixed with g-C3N4 first, and then, the TiO2/g-C3N4 composite with a strongly coupling (Ti)2–N–C bond at the interface was synthesized by a simple hydrothermal method to efficiently realize both roles. According to the transmission electron microscopy, X-ray photoelectron spectroscopy, and nuclear magnetic resonance results, the closely coupled TiO2/g-C3N4 composite not only improves the separation and transfer of the photogenerated carriers at the hybrid interface of the composites but also constrains abundant H2O at the interface of the TiO2/g-C3N4 catalyst to accelerate the H2O reaction with photogenerated carriers on g-C3N4. All of these lead to the highly efficient photocatalytic activity for H2 evolution on the TiO2/g-C3N4 composite by factors of 9.0 and 4.7 compared to that on pure g-C3N4 under solar light and visible light, respectively.
文章链接 : https://pubs.acs.org/doi/10.1021/acs.jpcc.1c02606