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Liu, Lifei; Zhang, Jianling; Tan, Xiuniang; Zhang, Bingxing; Shi, Jinbiao; Cheng, Xiuyan; Tan, Dongxing; Han, Buxing; Zheng, Lirong; Zhang, Fanyu
Nano research, 04/2020, Letnik: 13, Številka: 4Journal Article
To construct the heterojunctions of TiO 2 with other compounds is of great importance for overcoming its inherent shortages and improving the visible-light photocatalytic performance. Here we propose the construction of TiO 2 /covalent organic framework (COF) heterojunction with tight connection by a supercritical CO 2 (SC CO 2 ) method, which helps bridging the transformation paths for photo-induced charge between TiO 2 and COF. The produced TiO 2 /COF heterojunction performs a H 2 evolution of 3,962 µmol·g −1 ·h −1 under visible-light irradiation, which is ∼ 25 times higher than that of pure TiO 2 and 4.5 folds higher than that of TiO 2 /COF synthesized by the conventional solvothermal method. This study opens up new possibilities for constructing heterojunctions for solar energy utilization.
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