g-C_(3)N_(4)/{001}TiO_(2)异质结增强光催化剂降解MO  

g-C_(3)N_(4)/{001}TiO_(2)heterojunction enhances the photocatalyst degradation of MO

作　　者：郝欣 田景芝[1] 赵云鹏[1] 荆涛[1] 齐海燕[1] HAO Xin;TIAN Jing-zhi;ZHAO Yun-peng;JING Tao;QI Hai-yan(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006

出　　处：《化学研究与应用》2023年第8期1854-1863,共10页Chemical Research and Application

基　　金：齐齐哈尔大学研究生创新科研项目(YJSCX2021007)资助;黑龙江省表面活性剂与工业助剂重点实验室开放课题(BMHXJKF003)资助。

摘　　要：光催化技术因其反应条件温和而成为一种很有应用前景的污染物处理技术。本文采用热聚合法制备2D/2D石墨相氮化碳负载二氧化钛(g-C_(3)N_(4)/{001}TiO_(2))复合催化剂。通过XRD、FTIR、TEM、SEM、XPS和EIS等测试手段探究了g-C_(3)N_(4)和{001}TiO_(2)的微观形貌、结构、光生载流子的分离和迁移、催化机理以及之间异质结的成功构建。在氙灯模拟可见光下,对浓度为10 mg/L的甲基橙(MO)溶液进行降解测试,15-g-C_(3)N_(4)/{001}TiO_(2)的光催化活性最高。此外,研究表明含有不规则多孔状的g-C_(3)N_(4)/{001}TiO_(2)复合催化剂能有效的抑制光生电子-空穴对的复合,促进对太阳光的利用率,从而提高光催化活性。本研究为制备高效异质结光催化剂提供了新的方法。Photocatalytic technology was considered to be a promising pollutant treatment technology because of its mild reaction conditions.In this work,2D/2D graphite carbon nitride supported titanium dioxide(g-C_(3)N_(4)/{001}TiO_(2))heterojunctions was suc-cessfully fabricated by using a thermal polymerization strategy.Meanwhile,the as-prepared photocatalysts were characterized by XRD,FTIR,TEM,SEM,XPS and EIS.By these characterized were investigated the formation of the microstructure,structure,sepa-ration and migration of photogenerated carriers,catalytic mechanism and successful construction of heterojunction between g-C_(3)N_(4)and{001}TiO_(2).Under simulated visible light with xenon lamp,the degradation of 10 mg/L methyl orange(MO)solution was tested,15-g-C_(3)N_(4)/{001}TiO_(2)exhibited better photocatalytic activity.In addition,the irregular porous g-C_(3)N_(4)/{001}TiO_(2)composite cata-lyst can effectively inhibit the recombination of photogenerated electron-hole pairs and promote the utilization of sunlight,thereby improving the photocatalytic activity.This study provides a new method for the preparing of efficient heterojunction photocatalyst.

关 键 词：热聚合法 g-C_(3)N_(4) {001}TiO_(2) 光催化 水处理 

分 类 号：O614.4[理学—无机化学]