碳化MoS_(2)/掺硫g-C_(3)N_(4)异质结的合成及其在可见光下催化降解罗丹明B机理  

Carbonized MoS_(2)/S-Doped g-C_(3)N_(4) Heterojunction:Synthesis and Catalytic Degradation Mechanism of Rhodamine B under Visible Light

作　　者：邱灵芳 马梦帆 刘哲媛 陈建 李平 陈祥树[2] 喜多英敏 多树旺[1] QIU Ling‑Fang;MA Meng‑Fan;LIU Zhe‑Yuan;CHEN Jian;LI Ping;CHEN Xiang‑Shu;Kita Hidetoshi;DUO Shu‑Wang(Jiangxi Key Laboratory of Surface Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,China;Institute of Advanced Materials(IAM),State-Province Joint Engineering Laboratory of Zeolite Membrane Materials,College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022,China;Graduate School of Science and Technology for Innovation,Graduate School Science and Engineering,Yamaguchi University,Ube 755‑8611,Japan)

机构地区：[1]江西科技师范大学表面工程重点实验室,南昌330013 [2]江西师范大学化学化工学院,先进材料研究院,分子筛膜材料国家地方联合实验室,南昌330000 [3]山口大学大学院创成科学研究院,日本宇部755‑8611

出　　处：《无机化学学报》2021年第10期1885-1892,共8页Chinese Journal of Inorganic Chemistry

基　　金：The financial supports from Nation-al Natural Science Foundation of China (Grant No. 41763020);Natural Science Foundation of Jiangxi Province (GrantsNo.20171BAB206008, 20202BABL214040);Foundation of Jiangxi Educational Commission (Grant No. GJJ180596)。

摘　　要：为了进一步提高聚合物半导体类石墨相氮化碳(g-C_(3)N_(4))降解有机物的活性,通过简单的水热法复合得到碳化MoS_(2)/掺硫g-C_(3)N_(4)异质结(MoSC/S-CN),并在可见光下研究其罗丹明B(RhB)的降解性能。结果表明,相较于纯g-C_(3)N_(4),最优化的MoSC/S-CN样品对可见光的吸收范围得到明显拓宽,并且在100 min内对RhB的降解效率为92.5%,比纯g-C_(3)NQ性能提高68.83%。一系列的结构和光学性质表明,掺硫后再进一步与碳化MoS_(2)耦合可以协同作用于g-C_(3)N_(4),改善g-C_(3)N_(4)的能带结构,加速光生电子空穴对的分离,有效提高光催化活性。To further improve the photocatalytic activity of polymeric semiconductor,graphitic carbon nitride(gC_(3) N_(4)),for organic degradation,carbonized MoS_(2)/S-doped g-C_(3) N_(4) heterojunction(MoSC/S-CN) was prepared simply by hydrothermal method.And it was used to degrade rhodamine B(RhB) under visible-light illumination.Based on the results,it turned out that the visible-light adsorption range of optimized MoSC/S-CN became much broader,and the corresponding RhB degradation efficiency under visible-light illumination within 100 min was 92.5%,which was 68.83% higher than that of pure g-C_(3) N_(4).Based on a series of structural and optical characterizations,it is clear that after S doping and further coupling with carbonized MoS_(2),MoSC/S-CN shows a synergistic effect.The band structure of g-C_(3) N_(4) changes,and the photo-induced electron-hole pair separation rate is enhanced,which improves the photocatalytic activity of g-C_(3) N_(4) effectively.

关 键 词：碳化MoS_(2) 掺硫g-C_(3)N_(4) 半导体 异质结 可见光 

分 类 号：O643.3[理学—物理化学]