Li Ning, Liu Zhengtang, Liu Ming, Xue Chaorui, Chang Qing, Wang Huiqi, Li Ying, Song Zhenchao, Hu Shengliang
School of Energy and Power Engineering & School of Material Science and Engineering , North University of China , Taiyuan 030051 , P. R. China.
State Key Lab of Solidification Processing , Northwestern Polytechnical University , Xi'an 710072 , P. R. China.
Inorg Chem. 2019 May 6;58(9):5746-5752. doi: 10.1021/acs.inorgchem.9b00111. Epub 2019 Apr 5.
To better utilize carbon dots (CDs) as efficient photocatalysts, an excellent strategy of constructing CDs@MoS heterostructure is presented. Here a facile sonication-hydrothermal method is utilized to synthesize CDs@MoS. Such heterostructure regulates the energy level configuration, and visible light absorption and the separation and transfer of photogenerated charges are enhanced remarkably, which is propitious for the production of more photoinduced charges and improvement of the heterogeneous photocatalytic activity. Meanwhile, the photocatalytic performance of CDs@MoS was obviously improved in methylene blue degradation. On the basis of a series of contrast experiments, the possible mechanism of the photocatalytic reaction is proposed. Therefore, this work offers a facile route for the design of a zero-dimensional/two-dimensional heterojunction for the adjustment of the energy level structure and the improvement in photocatalytic performance.
为了更好地将碳点（CDs）用作高效光催化剂，提出了一种构建CDs@MoS异质结构的出色策略。在此，采用一种简便的超声-水热法合成CDs@MoS。这种异质结构调节了能级构型，显著增强了可见光吸收以及光生电荷的分离和转移，这有利于产生更多的光致电荷并提高多相光催化活性。同时，CDs@MoS在亚甲基蓝降解中的光催化性能明显提高。基于一系列对比实验，提出了光催化反应的可能机理。因此，这项工作为设计用于调节能级结构和提高光催化性能的零维/二维异质结提供了一条简便途径。
