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International Journal of Photoenergy
Volume 2012, Article ID 680419, 8 pages
http://dx.doi.org/10.1155/2012/680419
Research Article

Removal of a Cationic Dye by Adsorption/Photodegradation Using Electrospun PAN/O-MMT Composite Nanofibrous Membranes Coated with

1Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
2School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China

Received 8 September 2011; Revised 5 November 2011; Accepted 14 November 2011

Academic Editor: Mietek Jaroniec

Copyright © 2012 Qingqing Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Polyacrylonitrile (PAN)/organic-modified montmorillonite (O-MMT) composite nanofibrous membranes were firstly prepared by electrospinning and then coated with titanium dioxide (TiO2) using spin coating technique. The structural morphology of the nanofibrous membranes with different mass ratio of O-MMT before and after spin coating was investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). The chemical property of adsorbed methylene blue (MB) was analyzed by infrared spectroscopy (IR). The adsorption and photodegradation capability of the TiO2-coated PAN/O-MMT composite nanofibrous membranes were evaluated by adsorption rate of MB and K/S values of the membranes before and after UV irradiation. The experimental results indicated that with the increase of O-MMT amount, the diameters of the nanofibers decreased and the adsorption rate of MB was evidently improved. Besides, with the increase of TiO2 film layers, the photocatalytic properties were enhanced while the adsorption process was slowed down.