光催化
异质结
材料科学
量子点
可见光谱
制氢
分解水
光化学
量子产额
光电子学
辐照
氢
纳米技术
化学工程
化学
催化作用
光学
物理
有机化学
工程类
核物理学
荧光
作者
Weilong Shi,Wei Sun,Yanan Liu,Xiangyu Li,Xue Lin,Feng Guo,Yuanzhi Hong
标识
DOI:10.1016/j.renene.2021.11.030
摘要
Photocatalytic H2 evolution is a clean and renewable process that converts solar energy into chemical energy through water splitting under solar light irradiation. Herein, zero-dimensional (0D) Bi3TaO7 (BTO) quantum dots/three-dimensional (3D) onion-ring-like g-C3N4 (OR-CN) S-scheme heterojunction catalyst is constructed to simulate the production of hydrogen by photocatalysis under sunlight irradiation through a solvothermal method for photocatalytic hydrogen production under visible light irradiation. Results reveal that BTO/OR-CN heterojunction exhibited much higher photocatalytic activity compared to the pure BTO and OR-CN, in which the optimal loading amount 0.3% BTO/OR-CN composite endows the optimal photocatalytic H2 evolution rate of 4891 μmol g−1 with the apparent quantum yield (AQY) at 420 nm of 4.1%. The enhancement of excellent photocatalytic H2 performance is due to the formation of S-scheme heterojunction structure between 0D BTO quantum dots and 3D OR-CN, which promotes the separation and migration of photogenerated carriers and significantly enhances the visible-light absorption capacity. This work offers a viable strategy to construct 0D/3D S-scheme heterojunction photocatalyst in the application of photocatalytic field under visible light.
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