Fabrication of an ultrathin 2D/2D C3N4/MoS2 heterojunction photocatalyst with enhanced photocatalytic performance
Fabrication of an ultrathin 2D/2D C3N4/MoS2 heterojunction photocatalyst with enhanced photocatalytic performance
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DOI：
10.1016/j.jallcom.2019.151681
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发表时间：
2019-11-05
影响因子：
6.2
通讯作者：
Sun, Mingxian
中科院分区：
文献类型：
--
作者：
Li, Weibing;Wang, Lin;Sun, Mingxian
通过简单的机械研磨技术制备了超薄2D/2D C3N4/MoS2 (U-CN/MoS2)异质结光催化剂，以研究其光催化降解RhB和产氢性能。物理表征表明，超薄MoS2纳米片（U-MoS2）可以与超薄C3N4（U-CN）形成异质结，并且其固有晶体结构保持稳定。进一步的光催化性能测试表明，U-CN/MoS2异质结光催化剂显着增强了U-CN的光催化活性。 MoS2站质量分数为3%的U-CN/MoS2光催化剂（U-CN/MoS2-3）具有最佳的光催化性能。由于MoS2具有合适的能带结构，并且可以替代贵金属作为助催化剂，U-CN/MoS2-3可以实现385.04 mu mol.h(-1).g(-1)的产氢效率，这使得MoS2在光催化制氢方面显示出潜力。光催化性能的增强归因于光催化反应中光生载流子浓度的显着提高、光生载流子的有效分离以及光生电子和空穴的复合受到抑制。 (C) 2019 Elsevier B.V. 保留所有权利。
An ultrathin 2D/2D C3N4/MoS2 (U-CN/MoS2) heterojunction photocatalyst was prepared by a simple mechanical grinding technique to investigate the photocatalytic degradation RhB and hydrogen production performance. Physical characterization shows that the ultrathin MoS2 nanosheets (U-MoS2) can form heterojunction with the ultrathin C3N4 (U-CN), and their intrinsic crystal structure remains stable. Further photocatalytic performance test demonstrated that the U-CN/MoS2 heterojunction photocatalyst significantly enhanced the photocatalytic activity of U-CN. The U-CN/MoS2 photocatalyst with 3% mass fraction of MoS2 station (U-CN/MoS2-3) has the optimal photocatalytic performance. Due to MoS2 has a suitable band structure and can replace noble metal as a co-catalyst, the U-CN/MoS2-3 could achieve the hydrogen production efficiency of 385.04 mu mol.h(-1).g(-1), which makes MoS2 show potential in photocatalytic hydrogen production. The enhanced photocatalytic performance was attributed to the significantly enhanced concentration of photogenerated carriers, the effective separation of photogenerated carriers, and suppressed recombination of photogenerated electrons and holes in the photocatalytic reaction. (C) 2019 Elsevier B.V. All rights reserved.