异质结
黑磷
量子点
光催化
氧化还原
电子转移
X射线光电子能谱
光电效应
量子产额
材料科学
量子效率
化学
纳米技术
光化学
化学工程
光电子学
物理
光学
冶金
催化作用
工程类
有机化学
荧光
作者
Jie Ren,Yuan Yu,Yanning Qu,Dunlu Sun,Wenhui Chu,Qingmei Su,Linyin Huang,Bingshe Xu
标识
DOI:10.1016/j.cej.2023.142894
摘要
Z-scheme photocatalyst was researched in recent years due to its bionic electron transfer structure, while there were still challenges on amount of electron-hole pairs and preservation of redox ability in above systems. In this work, a new dual Z-scheme MoO3/ZnIn2S4/black phosphorus quantum dots (MZBP) heterojunction was constructed to solve above problems and employed for photocatalytic hydrogen (H2) evolution. According to the results, the H2 generation efficiency of MZBP reached to 5.45 mmol/g/h under visible light irradiation, which were 10 and 1.6 times higher than that of pure ZnIn2S4 and MoO3/ZnIn2S4 (MZ) material, respectively. The apparent quantum yield (AQY) of MZBP was calculated as 13.2% at 420 nm, indicating its high energy conversion property. In general, the enhanced separation ability of photo-induced carriers and large redox surfaces of dual Z-scheme MZBP system played important roles for enhancement of H2 evolution. According to the high-efficiency H2 evolution performance and significant dual Z-scheme mechanism, the novel heterojunction was promising for more applications in photoelectric fields.
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