聚吡咯负载氮化碳光催化剂的制备及其光降解性能研究  

Preparation of polypyrrole-supported carbon nitride photocatalyst and study on its photodegradation properties

作　　者：赵娟[1,2] 王宇威 张海明[1,2] 吕博宇 刘京 樊喆慧 樊丽权 ZHAO Juan;WANG Yu-wei;ZHANG Hai-ming;LV Bo-yu;LIU Jing;FAN Zhe-hui;FAN Li-quan(School of Materials Science and Engineering,Qiqihar University,Heilongjiang Qiqihar 161006,China;Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials,Heilongjiang Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006 [2]黑龙江省聚合物基复合材料重点实验室,黑龙江齐齐哈尔161006

出　　处：《齐齐哈尔大学学报（自然科学版）》2024年第6期54-60,共7页Journal of Qiqihar University(Natural Science Edition)

基　　金：黑龙江省教育厅基本科研业务专项课题(145309603);黑龙江省重点研发计划指导类项目(GZ20210034);黑龙江省聚合物基复合材料重点实验室开放课题(CLKFKT2021B3)。

摘　　要：通过原位聚合法,成功制备了聚吡咯改性石墨氮化碳(PPy/g-C_(3)N_(4))复合材料,旨在探究其在可见光下降解染料亚甲基蓝(MB)的性能。实验结果表明,当聚吡咯的摩尔分数为0.6%时,该PPy/g-C_(3)N_(4)光催化剂在60 min内对MB的降解率可达90%,相较于纯g-C_(3)N_(4)材料,光催化性能显著提升。此外,该复合材料还表现出优异的循环稳定性。通过自由基捕获实验,确认超氧自由基(·O_(2)^(-))和空穴(h^(+))是该复合材料降解污染物的主要活性物种。这是由于g-C_(3)N_(4)与PPy两者形成的p-n异质结有效减少了电子-空穴对的复合,从而增强了光催化降解活性。这将有助于深入了解反应机理,为制备具有能源和环境应用价值的g-C_(3)N_(4)基高效光催化剂提供可行的途径。Through the in-situ polymerization method,this study successfully prepared polypyrrole-modified graphite carbon nitride(PPy/g-C_(3)N_(4))composite materials,aiming to explore its performance in degrading the dye methylene blue(MB)under visible light.Experimental results show that when the molar fraction of polypyrrole is 0.6%,the PPy/g-C_(3)N_(4)photocatalyst can degrade MB up to 90%within 60 min,indicating that compared with pure g-C_(3)N_(4)material.The catalytic performance was significantly improved.In addition,the composite exhibits excellent cycling stability.Through free radical capture experiments,it was confirmed that superoxide radicals(•O_(2)^(-))and holes(h^(+))are the main active species for the degradation of pollutants by this composite material.This is because the p-n heterojunction formed by g-C_(3)N_(4)and PPy effectively reduces the recombination of electron-hole pairs,thereby enhancing its photocatalytic degradation activity.This work will help us deeply understand the reaction mechanism and provide a feasible way to prepare g-C_(3)N_(4)-based high-efficiency photocatalysts with energy and environmental application value.

关 键 词：氮化碳 聚吡咯 光催化 MB 

分 类 号：O643.36[理学—物理化学]