异质结
光催化
材料科学
还原(数学)
方案(数学)
计算机科学
电荷(物理)
光电子学
纳米技术
催化作用
化学
物理
数学
量子力学
几何学
生物化学
数学分析
作者
Quanlong Xu,Liuyang Zhang,Bei Cheng,Jiajie Fan
出处
期刊:Chem
[Elsevier]
日期:2020-07-01
卷期号:6 (7): 1543-1559
被引量:2014
标识
DOI:10.1016/j.chempr.2020.06.010
摘要
Summary
The significance of photocatalysts is unquestionable, and scientists are devoted to improving their photocatalytic efficiency. To solve the high recombination rates of photogenerated electron-hole pairs and their low reduction and oxidation abilities in a single photocatalyst, heterojunction manipulation is urgently required. Two mainstream heterojunctions—type-II and Z-scheme heterojunctions—have been widely acknowledged. However, we soberly reflect the charge-transfer mechanism from many perspectives and are finally aware of the fundamental challenges they face. To ensure a correct understanding, it is necessary to share our analysis with others. Moreover, step-scheme (S-scheme) heterojunctions, consisting of a reduction photocatalyst and an oxidation photocatalyst with staggered band structure, are introduced to avoid misinterpretation. The differences in the charge-transfer mechanism between S-scheme, type-II, and Z-scheme heterojunctions are highlighted. Finally, limitations and the future research direction of S-scheme photocatalysts are discussed.
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