S掺杂石墨型氮化碳的制备及光催化性能研究  

Preparation and photocatalytic properties of S-doped graphitic carbon nitride

作　　者：艾兵[1] 李佳奇 刘凡 韩永磊 李德刚[1] AI Bing;LI Jia-qi;LIU Fan;HAN Yong-lei;LI De-gang(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：《分子科学学报》2020年第6期511-515,I0006,共6页Journal of Molecular Science

基　　金：淄博市校城融合发展计划资助项目(2016ZBXC057)。

摘　　要：以硫酸铵作为S源,三聚氰胺为前驱体,通过热缩合法合成掺杂S的石墨型氮化碳(g-C3N4).利用X射线衍射光谱、傅里叶变换红外光谱及荧光光谱等技术对所制备的催化剂进行表征.结果表明,S元素掺杂减弱了g-C3N4的有序度,降低电子与空穴的复合率.通过对亚甲基蓝溶液降解性能测试,探究了S掺杂对g-C3N4光催化性能的影响.实验表明,掺杂不同比例的S会促进g-C3N4对亚甲基蓝的降解,在可见光下7%的S/g-C3N4的反应速率常数是纯g-C3N4的2.4倍.S-doped graphite-type carbon nitride was synthesized by thermal condensation using ammonium sulfate as the source of S and melamine as the precursor.X-ray diffraction,fourier transform infrared spectra,and photoluminescence were used to characterize the prepared catalysts.The results showed that S element doping could weaken the order degree of g-C3N4 and reduce the recombination rate of electrons and holes.The degradation performance of methylene blue solution was tested to explore the effect of S doping on photocatalytic performance of g-C3N4.Experiments showed that doping S of different proportions would promote the degradation of g-C3N4 to methylene blue.The reaction rate constant of 7%S/g-C3N4 was 2.4 times higher than that of neat g-C3N4 under visible light.

关 键 词：石墨型氮化碳 S掺杂 光催化 

分 类 号：O649[理学—物理化学]