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Construction of hierarchical Fe2O3@MnO2 core/shell nanocube supported C3N4 for dual Z-scheme photocatalytic water splitting
Solar Energy Materials and Solar Cells ( IF 6.9 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.solmat.2020.110624
Nan Wang , Liangpeng Wu , Juan Li , Jiamei Mo , Quanming Peng , Xinjun Li

Abstract A dual Z-scheme fe2O3@MnO2 core/shell nanocube supported C3N4 ternary composite is rationally designed and successfully fabricated as a photocatalyst for water splitting. The as-prepared Fe2O3@MnO2/C3N4 ternary composite exhibits an enhanced visible light-induced absorbance capacity and superior photocatalytic activity for direct water splitting than that of pure g-C3N4. The photocatalytic efficiency is investigated by varying amounts of Fe2O3@MnO2 core/shell nanocubes in the ternary composite (10%wt, 20%wt and 30%wt). When the mass fraction of Fe2O3@MnO2 is determined to be 20%, the hydrogen evolution rate would achieve the maximum with a value of 124 μmol*h−1. The improved photocatalytic performance of Fe2O3@MnO2/C3N4 ternary composite can be mainly attributed to improved visible light absorption range and construction of an effective dual Z-scheme interfacial heterojunction with a rapid separation and transfer of electron-hole pairs.

中文翻译:

用于双Z型光催化分解水的分层Fe2O3@MnO2核/壳纳米立方体负载C3N4的构建

摘要 合理设计并成功制备了双 Z 型 fe2O3@MnO2 核/壳纳米立方体负载的 C3N4 三元复合材料作为水分解光催化剂。所制备的 Fe2O3@MnO2/C3N4 三元复合材料比纯 g-C3N4 具有更强的可见光诱导吸收能力和优异的光催化直接分解水的活性。通过三元复合材料(10%wt、20%wt和30%wt)中不同数量的Fe2O3@MnO2核/壳纳米立方体来研究光催化效率。当Fe2O3@MnO2的质量分数确定为20%时,析氢速率达到最大值,值为124 μmol*h-1。
更新日期:2020-09-01
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