二次热处理对分级孔g-C_(3)N_(4)光催化性能改性的研究  

Study on the Modification of Photocatalytic Performance of g-C_(3)N_(4) with Hierarchical Pore by Secondary Heat Calcination

作　　者：乔岩 杨忠雪 李小草 王郁婷 张豫洁 马梦贤 陈建军 QIAO Yan;YANG Zhongxue;LI Xiaocao;WANG Yuting;ZHANG Yujie;MA Mengxian;CHEN Jianjun(Institute of Environmental&Catalytic Engineering,School of Chemistry and Chemical 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：《河南化工》2021年第6期15-19,共5页Henan Chemical Industry

基　　金：河南省科技攻关项目(212102310513);河南省高等学校大学生创新创业训练计划项目(S202012949003);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创业训练计划项目(DCZ2020017)。

摘　　要：以单分散二氧化硅球为模板,采用一步煅烧的方法合成分级孔g-C_(3)N_(4)(HPCN),再通过二次热处理的工艺对其进行改性。利用XRD、SEM、UV-Vis、N_(2)吸附测试和PL方法对催化剂进行了表征。结果表明:与HPCN相比,热处理后的HPCN不仅表面积和光吸收能力得到改善,而且更有利于光生载流子的分离。同时对催化剂可见光降解甲基橙性能进行研究,发现在500℃下,对HPCN保温2 h后得到样品具有最优光催化性能,可见光照射下,其反应速率(0.0151 min^(-1))是HPCN(0.0013 min^(-1))的12倍。Monodisperse silica spheres is used as a template,hierarchical pore g-C_(3)N_(4)(HPCN)is synthesised by a one-step calcination method.Then modified by a secondary calcination.The as-prepared sample is characterized by XRD,SEM,UV-Vis,N_(2) adsorption and PL test.The results show that compared with HPCN,the heat-treated HPCN not only improves the surface area and light absorption capacity,but also facilitates the separation of photogenerated carriers.At the same time,the visible light degradation performance of the catalyst for methyl orange degradation is studied.It is found that the sample obtained after holding HPCN at 500℃for 2 h exhibits the best photocatalytic performance.Under visible light irradiation,its reaction rate(0.0151 min^(-1))is 12 times that of HPCN(0.0013 min^(-1)).

关 键 词：分级多孔 g-C_(3)N_(4) 二次煅烧 光催化 

分 类 号：TQ426.99[化学工程]