NDLI: Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO$_{2}$-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

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Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO$_{2}$-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

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Iranian Polymer Journal : Volume 25, Issue 1, January 2016

Iranian Polymer Journal : Volume 24

Iranian Polymer Journal : Volume 23

Iranian Polymer Journal : Volume 22

Iranian Polymer Journal : Volume 21

Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO$_{2}$-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

Content Provider	Springer Nature Link
Author	Mungondori, Henry Heroe Tichagwa, Lilian Aoyi, Ochieng Katwire, David Meredith
Copyright Year	2016
Abstract	Nitrogen-doped titanium dioxide (N–TiO$_{2}$) was prepared and supported on a novel copolymer grafted membrane matrix to avoid the problems associated with the removal of spent photocatalyst from treated water. Membranes of poly (methacrylic acid) grafted onto poly (vinylidene difluoride) and blended with poly (acrylonitrile) (PMAA-g-PVDF/PAN) were prepared through a dry–wet phase inversion technique. Methacrylic acid side chains were grafted onto an activated PVDF backbone by the method of reversible addition fragmentation chain transfer polymerization and then the novel photocatalytic asymmetric membranes of N–TiO$_{2}$–PMAA-g-PVDF/PAN were prepared. The casting solutions were blended with 1–5 % N–TiO$_{2}$ before immersion into the coagulation bath. PVDF and PAN offer several advantages which include: mechanical strength and toughness, chemical resistance, unaffected by long-term exposure to UV radiation, low weight, and thermal stability. N–TiO$_{2}$ was prepared through sol-gel synthesis. The photocatalytic membranes were evaluated by degradation process of herbicide bentazon in water. Photodegradation studies revealed that the optimum photocatalyst loading was 3 % N–TiO$_{2}$ and the optimum pH was 7 for the degradation of bentazon in water. UV–Vis, TOC and LC–MS analyses confirmed the successful photodegradation of bentazon. A bentazon removal efficiency of 90.1 % was achieved at pH 7. N–TiO$_{2}$–PMAA-g-PVDF/PAN membranes were successfully prepared and characterized. These photocatalytic membranes showed great potential as a technology for the effective removal of pesticides from water. According to literature, N–TiO$_{2}$–PMAA-g-PVDF/PAN asymmetric photocatalytic membranes have not been prepared before for the purpose of treating agricultural wastewater.
Starting Page	135
Ending Page	144
Page Count	10
File Format	PDF
ISSN	10261265
Journal	Iranian Polymer Journal
Volume Number	25
Issue Number	2
e-ISSN	17355265
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-01-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Photodegradation Polymer Sciences Polymer membranes Herbicides Photocatalysis Ceramics, Glass, Composites, Natural Methods Bentazon Titanium dioxide
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Chemical Engineering Polymers and Plastics

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