光催化
石墨氮化碳
材料科学
贵金属
过电位
氮化碳
碳纤维
过渡金属
化学工程
分解水
硫化物
催化作用
复合数
无机化学
氢
氮化物
纳米技术
金属
化学
物理化学
复合材料
冶金
有机化学
图层(电子)
电化学
工程类
电极
作者
Junzhuo Li,Wanbao Wu,Yudong Li,Zhang Hai-Xin,Xianzhu Xu,Yanqiu Jiang,Kaifeng Lin
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2021-10-14
卷期号:4 (10): 11836-11843
被引量:15
标识
DOI:10.1021/acsaem.1c02606
摘要
Dependence on a noble metal cocatalyst is one of the main obstacles to the practical application of graphitic carbon nitride (g-CN) for photocatalytic hydrogen evolution. In this paper, a noble-metal-free photocatalyst, g-CN/MoS2 composite, was in situ synthesized via a gas–solid reaction where rodlike MoO3 was sulfurized to form MoS2 by the byproduct generated during the thermal condensation of thiourea, the precursor of g-CN. The composite exhibited an enhanced photocatalytic activity under irradiation of visible light, whose hydrogen evolution rate increased from 0.99 to 13.31 μmol·h–1, 13.44 times higher than that of pristine g-CN. On the basis of a series of characterization results, the formation and photocatalysis mechanism of g-CN/MoS2 was proposed, and the enhancement was attributed to the introduction of rodlike MoS2, which played the role as the cocatalyst instead of a noble metal to reduce the hydrogen evolution overpotential. This work provides a convenient method to synthesize a transition metal sulfide based on graphitic carbon nitride.
科研通智能强力驱动
Strongly Powered by AbleSci AI