g-C₃N₄纳米管/NiS₂复合材料的制备及其光催化性能  

Preparation and Photocatalytic Activity of g-C3N4 Nanotube/NiS2 Composites

作　　者：李思雨 尹国庚 潘鑫 王洁 李雨霏 刘梦洁 陈建军 

机构地区：[1]郑州师范学院化学化工学院,河南 郑州

出　　处：《材料科学》2024年第12期1766-1774,共9页Material Sciences

基　　金：河南省高等学校重点科研项目(No. 22B430032);国家级大学生创新创业训练计划项目(No. 202412949001);郑州师范学院大学生创新创业训练计划项目(No. DCZ2023012)。

摘　　要：首先以三聚氰胺为原料,通过水热结合煅烧的方法制备了g-C3N4纳米管(tg-C3N4)。然后以硝酸镍和硫代乙酰胺为前驱体,通过水热的方法制备出tg-C3N4/NiS2复合材料。采用XRD、FTIR、TEM、UV-Vis、PL和电化学测试方法对其进行了表征。结果表明,与tg-C3N4相比,tg-C3N4/NiS2复合材料具有更强的光吸收性能和光生电子–空穴分离效率。通过可见光下降解罗丹明B对其催化性能进行评价。结果发现:当NiS2质量分数为3%时,复合材料呈现出最佳的光催化效率,其对罗丹明B降解速率为0.0635 min−1,是tg-C3N4 (0.0145 min−1)的4.3倍。通过活性物种捕获实验可知,·O2−和·OH在光催化降解过程中起着主要作用。Firstly, g-C3N4 nanotubes (tg-C3N4) were prepared by hydrothermal combined with thermal polyme- rization using melamine as raw material. Then tg-C3N4/NiS2 composites were prepared by hydrothermal method using nickel nitrate and thioacetamide as precursors. The catalysts were characterized by XRD, FTIR, TEM, UV-Vis, PL and electrochemical tests. The results show that the tg-C3N4/NiS2 composites have enhanced light absorption properties and photogenerated electron-hole separation efficiency compared with tg-C3N4. The catalytic performance was evaluated by visible light degradation of Rhodamine B. It was found that the composite exhibited the best photocatalytic efficiency when the NiS2 mass fraction was 3%, and its degradation rate was 0.0635 min−1, which was 4.3 times as that of tg-C3N4 (0.0145 min−1). According to the active species trapping experiment, ·O2−and ·OH played the main roles in the photocatalytic degradation process.

关 键 词：NiS₂ g-C₃N₄纳米管 复合材料 光催化 

分 类 号：O64[理学—物理化学]