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用于可见光照射下染料去除的聚偏二氟乙烯-氧化石墨烯膜

Polyvinylidene Fluoride-Graphene Oxide Membranes for Dye Removal under Visible Light Irradiation.

作者信息

Alyarnezhad Sabri, Marino Tiziana, Parsa Jalal Basiri, Galiano Francesco, Ursino Claudia, Garcìa Hermenegildo, Puche Marta, Figoli Alberto

机构信息

Department of Applied Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65174, Iran.

Institute on Membrane Technology, CNR-ITM, Via P. Bucci 17c, 87030 Rende (CS), Italy.

出版信息

Polymers (Basel). 2020 Jul 7;12(7):1509. doi: 10.3390/polym12071509.

DOI:10.3390/polym12071509
PMID:32645993
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7407290/
Abstract

In this study, polyvinylidene fluoride (PVDF)-graphene oxide (GO) membranes were obtained by employing triethyl phosphate (TEP) as a solvent. GO nanosheets were prepared and characterized in terms of scanning and transmission electron microscopy (SEM and TEM, respectively), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), chemical analysis and inductively coupled plasma mass spectroscopy (ICP). Two different phase inversion techniques, Non-Solvent Induced Phase Separation (NIPS) and Vapour-Induced Phase Separation (VIPS)/NIPS, were applied to study the effect of fabrication procedure on the membrane structure and properties. Membranes were characterized by SEM, AFM, pore size, porosity, contact angle and mechanical tests, and finally tested for photocatalytic methylene blue (MB) degradation under visible light irradiation. The effect of different pH values of dye aqueous solutions on the photocatalytic efficiency was investigated. Finally, the influence of NaCl salt on the MB+ photodegradation process was also evaluated.

摘要

在本研究中，以磷酸三乙酯（TEP）作为溶剂制备了聚偏氟乙烯（PVDF）-氧化石墨烯（GO）膜。制备了GO纳米片，并通过扫描电子显微镜和透射电子显微镜（分别为SEM和TEM）、原子力显微镜（AFM）、X射线光电子能谱（XPS）、化学分析和电感耦合等离子体质谱（ICP）对其进行了表征。应用两种不同的相转化技术，即非溶剂诱导相分离（NIPS）和气相诱导相分离（VIPS）/NIPS，研究制备工艺对膜结构和性能的影响。通过SEM、AFM、孔径、孔隙率、接触角和力学测试对膜进行了表征，最后测试了其在可见光照射下对光催化亚甲基蓝（MB）降解的性能。研究了染料水溶液不同pH值对光催化效率的影响。最后，还评估了NaCl盐对MB+光降解过程的影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/b2163316d98c/polymers-12-01509-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/9327434c1bc0/polymers-12-01509-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/258164d665b7/polymers-12-01509-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/dc602c85ec23/polymers-12-01509-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/5ba3878f1578/polymers-12-01509-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/67d02ec295d5/polymers-12-01509-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/9100f374cf42/polymers-12-01509-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/439a/7407290/b2163316d98c/polymers-12-01509-g013.jpg

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