醌基氧化石墨烯介体膜的制备与催化偶氮染料生物降解  

Preparation of a Quinone-Graphene Oxide Membrane and Its Application to Catalyzing Biodegradation of Azo Dyes

作　　者：李进 叶茜 黄茵茵[1,2] 吴汉彬 Jin Li;Qian Ye;Yinyin Huang;Hanbin Wu(School of Environmental Science and Engineering,Xiamen University of Technology;Xiamen Key Laboratory of Membrane Research and Application,Xiamen 361024,China)

机构地区：[1]厦门理工学院环境科学与工程学院 [2]厦门理工学院厦门市膜技术研发与应用重点实验室,福建厦门361024

出　　处：《高分子材料科学与工程》2023年第2期80-88,共9页Polymer Materials Science & Engineering

基　　金：福建省自然科学基金资助项目(2019J01847);厦门市科技计划(2022CXY0408)。

摘　　要：氧化还原介体能催化加速偶氮染料的生物降解,但易随水流失,介体的膜基固定化为研究提供了新思路。文中以聚偏氟乙烯(PVDF)为聚合物、醌基氧化石墨烯(AQS-RGO)为氧化还原介质,采用相转化法制备了氧化还原介体AQS-RGO/PVDF膜,探究介体膜催化偶氮染料生物降解的性能。采用X射线衍射仪和X射线光电子能谱仪对膜进行表征,结果表明,AQS-RGO已被成功固载在膜上。利用扫描电镜和原子力显微镜对膜结构和形貌进行表征,结果表明AQS-RGO介体的引入,使膜内胞腔变小,海绵孔变得更致密。同时,对膜的接触角、水通量和截留率进行测定。发现AQS-RGO的添加使膜具有更好的亲水性和渗透性,最大纯水通量为283.09 L/(m^(2)·h),比PVDF原膜高4.7倍。在最佳条件下制备的AQS-RGO/PVDF膜能够将活性红X-3B的降解(脱色率≥90%)时间从48 h缩短到30 h,表明其对偶氮染料生物降解具有较好的催化效果,并且在活性红和酸性红染料的4次循环实验中都能保持90%以上的脱色率,具有良好的稳定性,展示出氧化还原介体膜的应用潜力。Redox mediators can catalyze and accelerate the biodegradation of azo dyes,but they are easily lost in water.The immobilization of the redox medium on membrane provides a new idea for research.In this paper,a redox mediator membrane(AQS-RGO/PVDF)was prepared by phase inversion method using poly(vinylidene fluoride)(PVDF)as polymer and quinone-based graphene oxide(AQS-RGO)as redox medium to explore the catalytic performance of membrane for the biodegradation of azo dyes.The membranes were characterized by XRD and X-ray photoelectron spectroscopy(XPS),and the results show that AQS-RGO was successfully immobilized on the membrane.The structure and morphology of the membrane were characterized by SEM and atomic force microscopy(AFM),and the results show that the addition of the AQS-RGO mediator makes the spongy pores in the membrane denser.Moreover,the contact angle,water flux and rejection of the membrane were measured.It is found that the addition of AQS-RGO mare the membrane has better hydrophilicity and permeability,and the maximum pure water flux is 283.09 L/(m^(2)⋅h),which is 4.7 times higher than that of the original PVDF membrane.The AQS-RGO/PVDF membrane prepared under the optimal condition can shorten the degradation time(decolorization rate≥90%)of reactive red X-3B from 48 h to 30 h,indicating that it has a good catalytic effect on the biodegradation of azo dyes.In addition,it can maintain a decolorization rate of more than 90%in 4 cycles of reactive red and acid red dyes.The redox medium membrane has a good stability,showing the application potential of the membrane.

关 键 词：氧化还原介体 醌基氧化石墨烯 膜 偶氮染料 降解 

分 类 号：X703[环境科学与工程—环境工程]