同质结
材料科学
异质结
钙钛矿(结构)
量子点
降级(电信)
光电子学
光催化
罗丹明B
半导体
量子效率
纳米技术
光化学
化学工程
电子工程
催化作用
化学
工程类
生物化学
作者
Chun Sun,Yiwei Zhao,Yelin Ding,Fuhao Zhang,Zhihui Deng,Kai Lian,Zhengtong Wang,Junfang Cui,Wengang Bi
标识
DOI:10.1021/acsami.4c04063
摘要
A novel TiO2–CsPbBr3(Q) photocatalyst is proposed and rationally constructed, where CsPbBr3 perovskite quantum dots (QDs) of various sizes inside mesopore TiO2 (M-TiO2) are integrated. These perovskite QDs, generated in situ within M-TiO2, establish a type-II homojunction. Interestingly, a Z-scheme heterojunction is simultaneously formed at the interface between CsPbBr3 and TiO2. Due to the coexistence of the type-II homojunction and the Z-scheme heterojunction, photogenerated electrons are effectively transferred from TiO2 to CsPbBr3, thereby suppressing carrier recombination and thus enhancing the degradation of rhodamine B (RhB). Compared with pure CsPbBr3 and TiO2, TiO2–CsPbBr3(Q) shows significantly enhanced photocatalytic performance for RhB degradation. The degradation efficiency of RhB in the presence of the TiO2–CsPbBr3(Q) attains 97.7% in 5 min under light illumination, representing the highest efficiency observed among photocatalysts based on TiO2. This study will facilitate the development of superior semiconductor catalysts for photocatalytic applications.
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