反应条件对多孔g-C3N4纳米片光催化性能的影响  

Effect of Reaction Conditions on Photocatalytic Performance of Porous g-C3N4 Nanosheets

作　　者：陈建军 乔岩 崔雅睿 郭欣雨 李小草 王郁婷 张豫洁 CHEN Jian-jun;QIAO Yan;CUI Ya-rui;GUO Xin-yu;LI Xiao-cao;WANG Yu-ting;ZHANG Yu-jie(School of Chemistry and Chemical Engineering,Institute of Environmental&Catalytic Engineering,Zhengzhou Normal University,Zhengzhou 450044,China)

机构地区：[1]郑州师范学院化学化工学院,环境与催化工程研究所,河南郑州450044

出　　处：《郑州师范教育》2020年第4期14-18,共5页Journal of Zhengzhou Normal Education

基　　金：河南省高等学校大学生创新创业训练计划项目(202012949003);郑州师范学院环境催化创新团队(702010);郑州师范学院大学生创新性实验计划项目(DCZ2019025)。

摘　　要：以三聚氰胺和硫脲为原料,采用煅烧的方法合成了多孔石墨相氮化碳(g-C3N4)纳米片并通过热处理工艺对其进行优化。通过XRD、FTIR、UV-vis和N2吸附测试对多孔g-C3N4纳米片(PCNS)进行了表征。与PCNS相比,优化后的PCNS具有更强的光吸收性能、更高的比表面积和更窄的禁带宽度。同时对材料的光降解甲基橙和产氢性能进行了研究,结果发现对PCNS二次热处理后得到的产品(PCNS-2)具有最佳的光催化性能。在可见光照射下,其对甲基橙降解速率(0.023 min^-1)是PCNS(0.003 min^-1)的7.7倍,产氢速率(501.39μmol·g^-1·h^-1)是PCNS(160.09μmol·g^-1·h^-1)的3.1倍。By using melamine and thiourea as raw materials,porous g-C3N4 nanosheets(PCNS)was synthesized by calcination process,and then modified by changing the calcination conditions.It was characterized by XRD、FTIR、UV-Vis and N2 adsorption methods.The results show that compared with the PCNS,the modified PCNS shows stronger light absorption ability,higher specific surface area and narrow band gap.The photocatalytic activity of the catalyst was evaluated by degrading MO and hydrogen production under visible light irradiation.The results show that PCNS-2 presents the superior photocatalytic performance.The degradation rate of PCNS-2(0.023 min^-1)is 7.7 times that of PCNS(0.003 min^-1),and hydrogen production rate of PCNS-2(501.39μmol·g^-1·h^-1)is 3.1 times that of PCNS(160.09μmol·g^-1·h^-1).

关 键 词：PCNS 产氢 优化 可见光催化 

分 类 号：O643[理学—物理化学]