Mo-g-C_(3)N_(4)制备与可见光催化性能  

Preparation and visible light catalytic performance of Mo-g-C_(3)N_(4)

作　　者：艾兵[1] 蒋泓城 何海南 李德刚[1] AI Bing;JIANG Hongcheng;HE Hainan;LI Degang(School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学化学化工学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2024年第4期66-70,78,共6页Journal of Shandong University of Technology:Natural Science Edition

基　　金：白云鄂博稀土资源研究与综合利用国家重点实验室联合研究课题项目(9001/3222016)。

摘　　要：以三聚氰胺和四水合钼酸铵为前驱体,利用一锅法制备了不同钼掺杂浓度的石墨型氮化碳光催化剂。利用X射线衍射(XRD)、红外光谱(FT-IR)、荧光光谱(PL)、扫描电子显微镜(SEM)等测试技术对合成催化剂进行了表征,结果发现:钼掺杂的氮化碳光催化剂具有石墨型结构,Mo的引入扩展了氮化碳的光谱响应范围,降低了光生电子和空穴的复合速率。亚甲基蓝的可见光降解测试表明,钼掺杂的氮化碳光催化剂比纯氮化碳展现出更高的光催化活性,掺杂浓度0.7%光催化剂的反应速率常数为纯氮化碳的1.4倍;同时,研究了Mo掺杂g-C_(3)N_(4)光催化降解性能的影响因素。Graphitic carbon nitride with different molybdenum doping concentrations were prepared by one-pot method with melamine and ammonium molybdate tetrahydrate as precursors.X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),photoluminescence(PL)and scanning electron microscope(SEM)were used to characterize the prepared catalysts.The characterization results showed that the carbon nitride photocatalysts doped with molybdenum had a graphite structure.The introduction of Mo extended the spectral response range of carbon nitride and reduced the recombination rate of photogenerated electrons and holes.The degradation tests of methylene blue under visible light showed that the photocatalytic activity of Mo-doped carbon nitride was higher than the pure carbon nitride.The reaction rate constant of the photocatalyst with a doping concentration of 0.7%was 1.4 times of the pure carbon nitride.In addition,we studied the influence factors of photocatalytic degradation performance of Mo-doped g-C_(3)N_(4).

关 键 词：石墨型氮化碳 钼掺杂 光催化剂 降解 

分 类 号：O641[理学—物理化学] O649[理学—化学]