[1]蒋善庆,曹 宇,马佳慧,等.Ag3VO4/g-C3N4复合材料可见光催化降解MC-LR的性能[J].常州大学学报(自然科学版),2020,32(05):8-16+26.[doi:10.3969/j.issn.2095-0411.2020.05.002]
　JIANG Shanqing,CAO Yu,MA Jiahui,et al.Performance of MC-LR Photocatalytic Degradation over Ag3VO4/g-C3N4 Composite under Visible Light Irradiation[J].Journal of Changzhou University(Natural Science Edition),2020,32(05):8-16+26.[doi:10.3969/j.issn.2095-0411.2020.05.002]
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Ag3VO4/g-C3N4复合材料可见光催化降解MC-LR的性能()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第32卷
期数:
2020年05期
页码:
8-16+26
栏目:
材料科学与工程
出版日期:
2020-09-28

文章信息/Info

Title:
Performance of MC-LR Photocatalytic Degradation over Ag3VO4/g-C3N4 Composite under Visible Light Irradiation
文章编号:
2095-0411(2020)05-0008-09
作者:
蒋善庆; 曹 宇; 马佳慧; 张浩东; 王利平
常州大学 环境与安全工程学院,江苏 常州 213164
Author(s):
JIANG Shanqing;  CAO Yu;  MA Jiahui;  ZHANG Haodong;  WANG Liping
School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, China
关键词:
Ag3VO4/g-C3N4复合材料;  可见光催化;  微囊藻毒素;  准一级动力学
Keywords:
Ag3VO4/g-C3N4 composite;  visible light catalysis;  microcystins;  pseudo first order dynamics
分类号:
X 703
DOI:
10.3969/j.issn.2095-0411.2020.05.002
文献标志码:
A
摘要:
以尿素和三聚氰胺混合煅烧制备了g-C3N4(CN(32)),进一步采用化学沉积法合成了不同负载量的Ag3VO4/CN(32)复合材料。采用X射线衍射、扫描电镜、傅里叶红外光谱和紫外可见光吸收光谱等对复合材料的晶型、组成、形貌、官能团以及光吸收性能进行了表征,考察了其在可见光下催化降解微囊藻毒素(MC-LR)的性能。结果表明,Ag3VO4成功负载在CN(32)表面,且Ag3VO4/CN(32)的光吸收性能较CN(32)有明显提高; 当Ag3VO4的负载量为20%时,Ag3VO4/CN(32)对MC-LR的光催化降解率最高,100 min内可达到85.4%,较CN(32)提高近10倍,且该反应过程符合准一级动力学模型。相比于CN(32),Ag3VO4/CN(32)的光催化性能明显增强的主要原因是Ag3VO4与CN(32)的复合促进了两者间光生电子和空穴分离效率。
Abstract:
g-C3N4(CN(32))was prepared by mixing urea and melamine, and then a series of Ag3VO4/CN(32)composites were successfully synthesized by chemical precipitation method. The crystalline and composition, morphology, functional groups and optical absorption performance of the synthesized samples were characterized by XRD, SEM, FT-IR and UV-Vis. Their photocatalytic performance in visible light was investigated through the experiment of microcystins(MC-LR)degradation. The results showed that Ag3VO4 was successfully loaded on the surface of CN(32), and the light absorption intensity of the composites was significantly improved compared with that of CN(32). The photocatalytic activity of Ag3VO4/CN(32)for MC-LR degradation was optimized. When the mass percentage of Ag3VO4 was 20% in the Ag3VO4/CN(32)composite, the degradation rate reached 85.4% within 100 min, which was 10 times higher than that of CN(32). Furthermore, MC-LR degradation by Ag3VO4/CN(32)showed a good compliance with the pseudo-first-order kinetic model. The enhanced photocatalytic performance of Ag3VO4/CN(32)composite was ascribed to the highly separation rate of electrons and holes.

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备注/Memo

备注/Memo:
收稿日期:2020-05-13。
基金项目:国家级大学生创新创业项目(201810292007); 常州大学自然科学基金资助项目(ZMF18020309)。
作者简介:蒋善庆(1988—),男,安徽池州人,博士,讲师。通信联系人:王利平(1960—),E-mail:wlp@cczu.edu.cn
更新日期/Last Update: 2020-09-20