光催化分离复合膜的制备及其在污水处理中的应用  

STUDY ON PREPARATION OF PHOTOCATALYTIC MEMBRANE AND ITS APPLICATION ON RHODAMINE B

作　　者：曾安然[1] 林志杰 吉顺峰 Zeng Anran;Lin Zhijie;Ji Shunfeng(Department of Material and Chemical Engineering, Liming Vocational University, Quanzhou 362000, Fujian, China)

机构地区：[1]黎明职业大学材料与化学工程学院,福建泉州362000

出　　处：《精细石油化工》2020年第5期72-77,共6页Speciality Petrochemicals

基　　金：泉州市高层次人才创新创业项目(2017G052)。

摘　　要：为提高膜在处理印染废水中的光催化分离性能,在聚砜膜(PSF)表面进行多巴胺(DA)氧化自聚制得亲水基膜(PDA/PSF),然后按比例配制纳米二氧化钛、氧化石墨烯和纤维素晶须的悬浮混合液,并通过压力吸附将其负载于PDA/PSF表面制备复合膜(GO/TiO2/CW@PDA/PSF)。膜结构测试结果显示,在PDA/PSF表面引入酚羟基等亲水基团后,使膜接触角降低至65°,改善了基膜亲水性以及与功能粒子的附着力。基于纯水通量和罗丹明B污染物降解率对功能粒子的复合负载量进行优化,结果表明最佳负载量TiO2/GO/CW分别为0.05 g/0.02 g/0.025 g,此时复合膜表面TiO2/GO/CW相互层叠并均匀分布,提高了水分子通过效率和光催化分离效率,测得纯水通量最佳为70 L/(m^2·h),罗丹明B最高光催化分离效率为90%。For improving the photocatalysis and separation effect in the printing and dyeing wastewater treatment,the hydrophilic membrane(PDA/PSF)was prepared by self-polymeric reaction of dopamine on the surface of Polysulfone membrane.Nano TiO2,graphene oxide and cellulose whisker with a certain proportion were loaded on membrane surface during sustained application of gas pressure.The structure characterization of the surface of membrane showed that the hydrophilicity and adhesion with functioned particle was improved by introducing phenolic hydroxyl hydrophilic groups,like as carboxyl and amino.The addition of TiO2,GO and CW was optimized based on the membrane flux and photo catalytic degradation of rhodamine B.Results show that the optimum loading of TiO2/GO/CW was 0.05 g/0.02 g/0.025 g.TiO2/GO/CW was well distributed with a stacked structure,and the water pass efficiency and photocatalysis effect was improved.The highest pure water flux was 70 L/(m^2·h),and best the photocatalysis and separation efficiency to RhB was about 90%.

关 键 词：光催化分离膜 多巴胺 纳米二氧化钛 氧化石墨烯 纤维素晶须 

分 类 号：TQ028.8[化学工程] TB33[一般工业技术—材料科学与工程]