PVDF/GO-ZnO光催化复合平板膜的制备及其性能
Preparation and Properties of PVDF/GO-ZnO Photocatalytic Composite Flat Membranes
王侠轶 1赵小军 1张东东 2王连欢 3赵义平3
作者信息
- 1. 张家口卷烟厂有限责任公司,河北 张家口 075000
- 2. 徐州工业职业技术学院材料工程学院,江苏 徐州 221000
- 3. 天津工业大学材料科学与工程学院,天津 300387
- 折叠
摘要
为有效解决纳米催化剂光催化后的回收困难问题,本文以聚偏氟乙烯(PVDF)为基质膜,以亲水性的光催化剂氧化石墨烯(GO)/氧化锌(ZnO)为添加剂,通过相转化法(NIPS)制备出具有自清洁功能的PVDF/GO-ZnO光催化复合平板膜,并对其结构及光催化性能进行了系统研究.与纯PVDF膜相比,PVDF/GO-ZnO光催化平板膜的孔径增加,使其亲水性和水通量显著提高.其中,GO-ZnO掺杂量为1.26%的PVDF/GO-ZnO光催化复合平板膜M-4 的纯水通量高达153.73 L/(m2·h),纯水接触角最小为77°.在模拟太阳光照射80 min时,该光催化复合平板膜对甲基蓝(MB)的降解效率高达 98.79%.此外,该光催化平板膜3 次循环降解染料后的光催化降解效率仍高达93.60%,且在不同酸碱性的染料溶液中依旧保持良好的光催化降解效果,在工业处理印染废水中显示出很好的应用前景.
Abstract
To effectively solve the problem of difficult recovery of nanocatalysts after photocatalysis,a self-cleaning polyvinylidene fluoride(PVDF)/graphene oxide(GO)-ZnO photocatalytic composite flat membrane was prepared through phase inversion method(NIPS).PVDF was used as as the matrix membrane and the hydrophilic photocatalyst GO/ZnO was used as the additive.The structures and photocatalytic performances of the flat membranes were systematically studied.The results show that,compared with pure PVDF membrane,the pore size of PVDF/GO-ZnO photocatalytic flat membrane increases,significantly improving its hydrophilicity and water flux.When the doped amount of GO-ZnO is1.26%,the pure water flux of PVDF/GO-ZnO photocatalytic composite flat membrane M-4 is as high as 153.73 L/(m2·h),and the minimum pure water contact angle is 77°.After 80 min of simulated sunlight exposure,the photocatalytic composite flat membrane exhibites a degradation efficiency of 98.79%for methyl blue(MB).In addition,the photocatalytic degradation efficiency of this photocatalytic composite flat membrane after three cycles of dye degradation is still as high as 93.60%,and it still maintains good photocatalytic degradation effect in dye solutions with different acidity and alkalinity,showing good application prospects in industrial treatment of printing and dyeing wastewater.
关键词
聚偏氟乙烯/氧化锌/氧化石墨烯/光催化/降解Key words
Polyvinylidene Fluoride/Zinc Oxide/Graphene Oxide/Photocatalysis/Degradation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据