In Situ Preparation and Analysis of Bimetal Co?doped Mesoporous Graphitic Carbon Nitride with Enhanced Photocatalytic Activity

作     者：Wanbao Wu Zhaohui Ruan Junzhuo Li Yudong Li Yanqiu Jiang Xianzhu Xu Defeng Li Yuan Yuan Kaifeng Lin 

作者机构：School of Chemistry and Chemical Engineering Harbin Institute of Technology Key Laboratory of Aerospace Thermophysics Ministry of Industry and Information TechnologyHarbin Institute of Technology 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2019年第11卷第1期

页      面：175-190页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：the financial support from National Natural Science Foundation of China (51472062) 

主　　题：Co-doped g-C3N4 Porous g-C3N4 Photocatalysis Optical simulation Light absorption intensity 

摘      要：A novel photocatalyst of mesoporous graphitic carbon nitride(g-C_3N_4) co-doped with Co and Mo(Co/Mo-MCN) has been one-pot synthesized via a simple template-free method; cobalt chloride and molybdenum disulfide were used as the Co and Mo sources, respectively. The characterization results evidently indicate that molybdenum disulfide functions as Mo sources to incorporate Mo atoms in the framework of g-C_3N_4 and as a catalyst for promoting the decomposition of g-C_3N_4, resulting in the creation of mesopores. The obtained Co/Mo-MCN exhibited a significant enhancement of the photocatalytic activity in H_2 evolution(8.6 times) and Rhodamine B degradation(10.1 times) under visible light irradiation compared to pristine g-C_3N_4. Furthermore, density functional theory calculations were applied to further understand the photocatalytic enhancement mechanism of the optical absorption properties at the atomic level after Co-or Mo-doping. Finite-di erence time-domain simulations were performed to evaluate the e ect of the mesopore structures on the light absorption capability. The results revealed that both the bimetal doping and the mesoporous architectures resulted in an enhanced optical absorption; this phenomenon was considered to have played a critical role in the improvement in the photocatalytic performance of Co/Mo-MCN.