膜科学与技术

多功能GO/g-C3N4/Ag复合膜的制备及性能研究

作者：赵蕾，朱孟府，郝丽梅，刘红斌，邓橙

单位：军事科学院系统工程研究院卫勤保障技术研究所，天津 300161

关键词：氧化石墨烯；石墨相氮化碳；纳米银；复合膜；SERS

出版年,卷(期):页码： 2020,40(1):64-71

摘要：

采用真空辅助抽滤的方法制备了自支撑的氧化石墨烯复合膜，对其形态和结构进行表征，并以R6G溶液为目标污染物，考察了复合膜的水通量、R6G截留率、SERS检测性能及光催化降解性能。结果表明，g-C3N4和Ag纳米颗粒成功嵌入GO片层之间，制备出GO/g-C3N4/Ag复合膜，膜厚度约为4.2 μm，水通量为230.64 Lm-2h-1MPa-1，R6G截留率达到91.27%；复合膜通过SERS技术能实现对R6G的快速、高灵敏度检测，检测浓度可低至10 nM；复合膜光催化降解性能良好，可见光下反应2h后R6G降解率可达97.05%。GO/g-C3N4/Ag复合膜具有吸附分离、SERS检测及光催化降解等多种功能，改善了GO膜的渗透通量低、不可重复利用等问题，可用于水中有机污染物的检测及降解。

In this paper, a freestanding graphene oxide composite membrane (GO/g-C3N4/Ag membrane) was fabricated by facile vaccum filtration. Characterizations on its morphology and structure were then carried out. The water flux, rejection rate, SERS detection activity and photogradation performance of GO/g-C3N4/Ag membrane were respectively evaluated by treating R6G solutions. The GO/g-C3N4/Ag membrane has a thickness of about 4.2 μm. With intercalation of g-C3N4 and AgNPs into GO nanosheets, the GO/g-C3N4/Ag membrane exhibits high water flux of 230.64 Lm-2h-1MPa-1 and rejection rate of 91.27%. SERS detection was conducted after filtering R6G solution through the GO/g-C3N4/Ag membrane, and it was detectable with the concentration of as low as 10 nM. The GO/g-C3N4/Ag membrane also exhibits high photocatalytic activity with degradation rate of 97.05% after irradiation of 2 h. This multifunctional GO composite membrane overcome the deficiency of low permeation flux and non-recyclability of pure GO membrane, indicating a great potential in treating organic pollutants.

第一作者简介：赵蕾（1994－），女，博士研究生，研究方向为分离膜材料制备及性能研究；电子邮件：zleicomeon@163.com *通讯作者， E-mail：zmf323@163.com

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