上部结构
材料科学
光催化
人工光合作用
生物矿化
纳米晶
电子转移
纳米技术
载流子
光合作用
分解水
半导体
化学工程
光化学
光电子学
化学
催化作用
有机化学
物理
热力学
工程类
生物化学
作者
Wenxuan Wang,Yanwei Zhang,Jingjing Xie,Yanze Wang,Shaowen Cao,Hang Ping,Zhaoyong Zou,Hui Zhong,Zhengyi Fu
标识
DOI:10.1021/acsami.2c19692
摘要
Natural photosynthesis involves an efficient charge-transfer pathway through exquisitely arranged photosystems and electron transport intermediates, which separate photogenerated carriers to realize high quantum efficiency. It inspires a rational design construction of artificial photosynthesis systems and the architectures of semiconductors are essential to achieve optimal performance. Of note, biomineralization processes could form various mesocrystals with well-ordered superstructures for unique optical applications. Inspired by both natural photosynthesis and biomineralization, we construct a ternary superstructure-based mesocrystal TiO2 (meso-TiO2)/Au/CdS artificial photosynthesis system by a green photo-assisted method. The well-ordered superstructure of meso-TiO2 and efficient charge-transfer pathway among the three components are crucial for retarding charge recombination. As a result, the meso-TiO2/Au/CdS photocatalyst displays enhanced visible light-driven photocatalytic hydrogen evolution (4.60 mmol h–1 g–1), which is 3.2 times higher than that of commercial TiO2 (P25)/Au/CdS with disordered TiO2 nanocrystal aggregates (1.41 mmol h–1 g–1). This work provides a promising bioinspired design strategy for photocatalysts with an improved solar conversion efficiency.
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