光催化
贵金属
材料科学
异质结
三元运算
复合数
化学工程
载流子
金属
水溶液
纳米技术
光电子学
催化作用
复合材料
物理化学
化学
冶金
计算机科学
生物化学
工程类
程序设计语言
作者
Xing Chen,Xiaochun Ke,Jinfeng Zhang,Changchun Yang,Kai Dai,Changhao Liang
标识
DOI:10.1016/j.ceramint.2021.01.207
摘要
Inadequate photogenerated carriers' separation is deemed to be the major obstacles for improving photocatalytic H2 evolution. Here, we designed distinctive Ni2P/porous g-C3N4/Cd0.5Zn0.5Se-diethylenetriamine (Ni2P/pg-C3N4/Cd0.5Zn0.5Se-D) nanojunction via an in-situ solvothermal synthesis. The cooperative effect of Cd0.5Zn0.5Se-D and Ni2P can extend the visible light absorption for pg-C3N4. As a result, the ternary Ni2P/pg-C3N4/Cd0.5Zn0.5Se-D composite exhibits high-performance H2 evolution rate of 12627 μmol g−1 h−1 using solar light, being almost 105.23 and 2.59 folds higher than those observed over Ni2P/pg-C3N4 and pg-C3N4/Cd0.5Zn0.5Se-D composite, severally. The possible mechanism is assumed that the formation of the novel Ni2P modified step-scheme (S-scheme) pg-C3N4/Cd0.5Zn0.5Se-D heterojunction which manipulated highly efficient spatial separation and directional migration of photocarriers. Moreover, DFT calculations have been performed to uncover the process of the charge transport. This work concentrates on the profound part of noble-metal-free decorated S-scheme photocatalytic system in water splitting.
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