文献类型：期刊文献

英文题名：Preparation of Porous PVDF Nanofiber Coated with Ag NPs for Photocatalysis Application

作者：Ning, Jing[1];Zhang, Xin[1];Yang, Hu[1];Xu, Zhen-Liang[1];Wei, Yong-Ming[1]

机构：[1]E China Univ Sci & Technol, Membrane Res Ctr, Chem Engn Res Inst, Shanghai 200237, Peoples R China

年份：2016

卷号：17

期号：1

起止页码：21

外文期刊名：FIBERS AND POLYMERS

收录：;EI(收录号：20160601909919);WOS:【SCI-EXPANDED(收录号:WOS:000368961800004)】；

基金：The authors gratefully acknowledge National Natural Science Foundation of China (NO. 21276075) for the financial support.

语种：英文

外文关键词：Porous nanofiber; PVA; Ag NPs; Photoactivity; Surface coating

摘要：The porous Polyvinylidene fluoride (PVDF) nanofibers were prepared by leaching method using polyethylene oxide (PEO) as porogen for the first time. The influences of the molecular weight (MW) and concentration of PEO, and the leaching solution on the morphology and the surface area of the porous PVDF nanofiber were systematically investigated. Polyethylene glycol 6000 (PEG6000) showed a better pore-forming effect. Optimized preparation parameters were obtained. With the ratio of PEG6000/PVDF reaching 1:1, the surface area of the resulting porous PVDF nanofiber was about three times higher than that of the pure PVDF nanofiber. Moreover, NaClO solution as leaching solution showed a very limited influence on the surface area of porous PVDF nanofiber. Afterwards, Ag NPs coated PVDF (Ag/PVDF) nanofiber was prepared by physical adsorption of Ag ions and in-situ reduction reaction using sodium borohydride as reductant. The photoactivity of Ag/PVDF nanofiber was evaluated by the photodegradation of methyl orange (MO) under visible light irradiation. Ag/PVDF nanofiber showed a better photoactivity than PVDF-Ag nanofiber prepared by the ex-situ blending method.