碳酸氧铋复合氮化碳同型异质结光催化降解四环素  

Photocatalytic Degradation of Tetracycline by Isotype Heterojunction Ofbismuth Carbonate Oxide Compounded with Carbon Nitride

作　　者：陈晓雪 杨宇鹏 龚福忠[1,2] 卢秋影 王超 黄世勇 CHEN Xiaoxue;YANG Yupeng;GONGFuzhong;LU Qiuying;WANG Chao;HUANG Shiyong(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,Guangxi University,Nanning 530004,China;Guangxi Research Institute of Chemical Industry Co.,Ltd.,Nanning 530001,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西石化资源加工及过程强化技术重点实验室,广西南宁530004 [3]广西化工研究院有限公司,广西南宁530001

出　　处：《化工技术与开发》2023年第8期60-66,共7页Technology & Development of Chemical Industry

基　　金：广西石化资源加工及过程强化技术重点实验室项目(2021Z001)。

摘　　要：以尿素、三聚氰胺为前驱体,采用高温固相法制备了卷曲纳米片状多孔石墨烯型氮化碳g-C_(3)N_(4)(UMCN)同型异质结材料,然后将UMCN与Bi(NO_(3))_(3)、Na_(2)CO_(3)在液相中通过自组装法,制备了BiO_(2)CO_(3)(BOC),又与UMCN复合制备了BOC/UMCN光催化剂,考察了它们对四环素的吸附性能和光催化降解性能,探究了光催化剂投加量、四环素初始浓度、pH、无机阴离子等因素对光催化降解性能的影响,同时采用纯三聚氰胺制备了g-C_(3)N_(4)(记为MCN)进行对比。研究结果表明,MCN和UMCN对四环素基本没有吸附作用,BOC对四环素具有良好的吸附性能,BOC/UMCN对四环素的吸附性能有显著提高。在光催化性能方面,对四环素的光催化性能,依次为UMCN>MCN>BOC。BOC与质量比为30%的UMCN复合形成的光催化剂BOC/UMCN-30,对四环素的去除率最高,达到94.1%,吸附去除率为49.7%,光催化降解率为44.4%。该复合光催化剂对四环素的去除,是吸附和光催化降解协同作用的结果。The convoluted nanosheet-like porous g-C_(3)N_(4)(UMCN)isotype heterojunction materials were prepared by hightemperature solid-phase method using urea and melamine as precursors,and then the BOC/UMCN photocatalyst with BiO_(2)CO_(3)(BOC)compounded with UMCN was prepared by self-assembly method by combining UMCN with Bi(NO_(3))_(3) and Na_(2)CO_(3) in a liquid phase.Its adsorption performance on tetracycline and photocatalytic degradation performance as well as the effects of photocatalyst dosing,initial concentration of tetracycline,pH and inorganic anion on photocatalytic degradation performance were investigated,while g-C_(3)N_(4)(noted as MCN)was prepared using pure melamine for comparison.The results showed that MCN and UMCN had basically no adsorption effect on tetracycline,BOC had good adsorption performance on tetracycline,and the adsorption performance of BOC/UMCN on tetracycline was significantly improved.For the photocatalytic performance,the photocatalytic performance for tetracycline was in the order of UMCN>MCN>BOC.The photocatalyst BOC/UMCN-30,formed by the combination of BOC and UMCN with a mass ratio of 30%,showed the highest removal rate of 94.1%for tetracycline,49.7%for adsorption and 44.4%for photocatalytic degradation.The removal of tetracycline by the composite photocatalyst was the result of the synergistic effect of adsorption and photocatalytic degradation.

关 键 词：g-C_(3)N_(4) BOC/UMCN复合光催化剂 异质结 四环素 降解 

分 类 号：O643.36[理学—物理化学]