Fe掺杂g-C_(3)N_(4)/MoS_(2)复合材料的制备及其光催化性能的研究  

Synthesis andphotocatalytic activity of Fe doped g-C_(3)N_(4)/MoS_(2) nanocomposites

作　　者：焦玉荣[1] 袁晨曦 张亚[1] 马亚军[1] 相玉琳[1] 弓莹[1] 刘侠[1] 韩志萍[1] JIAO Yurong;YUAN Chenxi;ZHANG Ya;MA Yajun;XIANG Yulin;GONG Ying;LIU Xia;HAN Zhiping(College of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000

出　　处：《功能材料》2021年第6期6116-6119,6125,共5页Journal of Functional Materials

基　　金：教育部留学回国人员科研启动资助项目[2015]1098;国家地区基金(21663033,41967022,51762042);榆林市产学研资助项目(CXY-2020-008-05,CXY-2020-002-02);陕西省科技厅科研计划资助项目(2020JM-627);陕西省科技资源开放共享平台资助项目(2019PT-18);榆林学院大学生创新创业训练项目资助项目(S202011395031);陕西省低变质煤洁净利用重点实验室资助项目(21JSO49)。

摘　　要：利用高温煅烧和水热法以三聚氰胺、钼酸铵和硫脲为原材料制备纳米g-C_(3)N_(4)(GCN)、MoS_(2)及二元负载g-C_(3)N_(4)/MoS_(2)(GCN/MoS_(2))层状材料和Fe掺杂GCN/MoS_(2)的三元(Fe/GCNM)杂化结构的材料。通过SEM、TEM、FT-IR和DRS等表征手段分别对制备的纳米材料的形貌和尺寸、结构进行分析。以甲基橙溶液(MO)为降解目标,用降解MO溶液前后的浓度比值(C/C0)为评价指标,对催化剂的种类和催化剂的用量进行了优化。实验表明,与纯GCN相比,GCN/MoS_(2)和Fe/GCN显著提高了对MO的降解能力,C/C0分别为0.38、0.23和0.17。此外,Fe/GCN的反应速率常数(k)远高于GCN、GCNM和Fe/GCN,这是由于Fe和MoS_(2)与GCN合成促进了光生电子空穴对的分离,提高了其催化性能。The composites of g-C_(3)N_(4)(GCN),MoS_(2) and loaded g-C_(3)N_(4)/MoS_(2)(GCN/MoS_(2))layered materials and Fe doped GCN/MoS_(2)(Fe/GCNM)hybrid materials are prepared by high temperature calcination and hydrothermal method with melamine,ammonium molybdate and thioureas as raw materials.The morphology,size and structure of nanomaterials are characterized by SEM,TEM,FT-IR and DRS.In addition,the photocatalytic activities are evaluated by the concentration ratio C/C0 of MO solution before and after the degradation and optimized the effect of different catalysts and the dosage of composite catalysts.The results show that compared with pure GCN,GCN/MoS_(2) and Fe/GCNM significantly improve the photodegradation efficiency toward the MO with the C/C0 of 0.38,0.23 and 0.17,respectively.In addition,the reaction rate constant(K)of Fe/GCNM is much higher than that of GCN,GCNM and Fe/GCN,which is attributed to the separation of photogenic electron-hole pairs promoted by the synthesis of Fe and MoS_(2) composited with GCN and improves the catalytic performance.

关 键 词：碳化氮 二硫化钼 水热法 甲基橙 光催化 

分 类 号：O611.6[理学—无机化学]