MoO3-C3N4复合光催化剂的可见光下高效催化降解甲基橙
MoO3-C3N4 Photocatalysts with High Performance for Degradation of Methyl Orange under Visible Light
作者单位E-mail
马令娟 曲阜师范大学化学与化工学院, 曲阜 273165 malingjuan@qfnu.edu.cn 
侯梦宁 曲阜师范大学化学与化工学院, 曲阜 273165  
马宏彬 曲阜师范大学化学与化工学院, 曲阜 273165  
曹震 曲阜师范大学化学与化工学院, 曲阜 273165  
薛振 曲阜师范大学化学与化工学院, 曲阜 273165  
陆玥汝 曲阜师范大学化学与化工学院, 曲阜 273165  
摘要: 以钼酸铵和C3N4为前驱体,利用浸渍法成功制备了高性能MoO3-C3N4复合光催化剂,利用X射线衍射(XRD)、傅里叶红外(FT-IR)、高分辨电镜(HRTEM)及N2吸附-脱附曲线等测试手段对所得MoO3-C3N4光催化剂进行了结构和形貌表征。以可见光下光催化降解甲基橙反应表征MoO3-C3N4的光催化活性。实验结果表明,MoO3-C3N4光催化剂具有非常好的光催化降解性能,且MoO3含量对反应活性产生显著影响。当MoO3含量为1.6%(w/w)时光催化活性最好,其速率常数达到C3N4的50倍。通过研究发现该复合催化剂的高活性来自于其Z型光生载流子传输过程,抑制了光生电子空穴对的复合并延长了引入MoO3产生的载流子的寿命。
关键词: MoO3-C3N4  C3N4  光催化  甲基橙  光降解
基金项目: 国家自然科学基金(No.21403124)和山东省自然科学基金(No.ZR2014JL014)资助项目。
Abstract: High performance MoO3-C3N4 photocatalysts were prepared by impregnation method with (NH4)6Mo7O24·4H2O and C3N4 as precursors. The MoO3-C3N4 photocatalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), high resolution transmission electron microscopy (HRTEM) and nitrogen physisorption isotherm. And methyl orange (MO) degradation was chosen to test the photocatalytic performance of MoO3-C3N4. It was found that all MoO3-C3N4 samples showed very high surface area, exhibited high photocatalytic activity for MO degradation under visible light irradiation and the content of MoO3 affected the photocatalytic activity. The rate constant of 1.60%(w/w) MoO3-C3N4 was 50 times higher than that of pure C3N4. The enhancement of photocatalytic activity over the heterojunction catalyst could be directly attributed to the Z-scheme photo-generated charge carrier transfer process, which contributes to suppressed recombination rate of photogenerated electron-hole pairs and prolonged lifetime of charge carriers caused by hybridization of MoO3.
Keywords: MoO3-C3N4  C3N4  photocatalysis  methyl orange  photodegradation
投稿时间:2018-04-26 修订日期:2018-09-04
摘要点击次数:  41
全文下载次数:  42
马令娟,侯梦宁,马宏彬,曹震,薛振,陆玥汝.MoO3-C3N4复合光催化剂的可见光下高效催化降解甲基橙[J].无机化学学报,2018,34(10):1899-1909.
查看全文  查看/发表评论  下载PDF阅读器
Support information: