Role of transition metal oxides in g-C3N4-based heterojunctions for photocatalysis and supercapacitors

• 作者: Liqi Bai Hongwei Huang Shixin Yu Deyang Zhang Haitao Huang Yihe Zhang
• 来源期刊: 能源化学
• 年，卷（期）: 2022,（1）
• 页码范围: 214-235
• 页数: 22页
• 语种: 英文

摘要

g-C3N4 emerges as a star 2D photocatalyst due to its unique layered structure,suitable band structure and low cost.However,its photocatalytic application is limited by the fast charge recombination and low photoabsorption.Rationally designing g-C3N4-based heterojunction is promising for improving photocat-alytic activity.Besides,g-C3N4 exhibits great potentials in electrochemical energy storage.In view of the excellent performance of typical transition metal oxides (TMOs) in photocatalysis and energy storage,this review summarized the advances of TMOs/g-C3N4 heterojunctions in the above two areas.Firstly,we introduce several typical TMOs based on their crystal structures and band structures.Then,we sum-marize different kinds of TMOs/g-C3N4 heterojunctions,including type Ⅰ/Ⅱ heterojunction,Z-scheme,p-n junction and Schottky junction,with diverse photocatalytic applications (pollutant degradation,water splitting,CO2 reduction and N2 fixation) and supercapacitive energy storage.Finally,some promising strategies for improving the performance of TMOs/g-C3N4 were proposed.Particularly,the exploration of photocatalysis-assisted supercapacitors was discussed.