一步水热法制备MoS2/C3N4 NTs复合材料及其光催化性能  

Fabrication of MoS2/C3N4 NTs composites by one-step hydrothermal method and their photocatalytic properties

作　　者：胡月月 姜涛 张敏 韩林 李健 闫冰 HU Yueyue;JIANG Tao;ZHANG Min;HAN Lin;LI Jian;YAN Bing(College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China)

机构地区：[1]天津科技大学化工与材料学院,天津300457

出　　处：《河北工业大学学报》2020年第5期58-63,共6页Journal of Hebei University of Technology

基　　金：天津市教委科研计划项目(2017KJ018)。

摘　　要：首先通过无模板法制备g-C3N4纳米管,然后以钼酸铵、硫脲为前驱体,g-C3N4纳米管为基底,通过一步水热法制备了MoS2/g-C3N4纳米管(MoS2/C3N4 NTs)复合材料。通过XRD、FTIR、SEM、EDS、TGA等测试手段对复合材料的形貌和结构进行表征,并以罗丹明B(RhB)溶液为目标污染物进行光催化降解实验,测试复合材料的光催化活性。研究结果表明:200℃下制备的MoS2负载量为30%的复合物的形貌最好。随着温度的降低,复合物尺寸增大,形貌趋于不规则。不同温度下制备的MoS2/C3N4 NTs复合材料的光催化活性明显优于g-C3N4纳米管和MoS2,160℃下制备的MoS2负载量为30%的复合物光催化效果最好,经过120 min可见光照射,复合材料对于RhB溶液的降解率可达54%,分别为g-C3N4纳米管和MoS2的4倍和9倍。First,the g-C3N4 nanotubes were prepared by template-free method.And then MoS2/g-C3N4 nanotubes(MoS2/C3N4 NTs)composites were prepared by one-step hydrothermal method using ammonium molybdate and thiourea as pre⁃cursors and g-C3N4 nanotubes as substrates.The morphology and structure of the composites were characterized by X-ray diffraction(XRD),fourier transform infrared spectroscopy(FTIR),scanning electron microscopy(SEM),energy disper⁃sion spectrum(EDS)and thermogravimetric analysis(TGA).The photocatalytic activities of composites were evaluated by the degradation of rhodamine B(RhB)solution under visible light irradiation.The results showed that the MoS2/C3N4 NTs composite at MoS2 weight content of 30%possesed the best morphology.As the temperature decreased,the size of the composite increased and the morphology tended to be irregular.The photocatalytic activities of MoS2/C3N4 NTs com⁃posites synthesized at different temperatures were significantly better than that of g-C3N4 nanotubes and MoS2.After 120 min visible light irradiation,the composite with the loading of 30%of MoS2 prepared at 160℃presented the hightest photocatalytic activity up to 54%,which was almost 4 and 9 times higher than that of g-C3N4 nanotubes and MoS2.

关 键 词：g-C3N4纳米管 复合材料 MOS2 光催化降解 无模板法 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]