Journal of Hazardous Materials 2014-09-15

Dye removal by surfactant encapsulated polyoxometalates

Lei Yao, Shun Kuang Lua, Lizhi Zhang, Rong Wang, ZhiLi Dong

Index: J. Hazard. Mater. 280 , 428-35, (2014)

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Abstract

A novel surfactant encapsulated polyoxometalate (SEP) has been synthesized by using a simple ion-exchange reaction. The prepared SEP complex was found to self-assemble into nanospherical particles whose morphology and component were characterized by TEM and XPS. The SEP was further incorporated into polyvinylidene fluoride (PVDF) to fabricate SEP incorporated composite membrane (SEP-M). Both the SEP and SEP-M exhibited excellent dye removal activities, which is for the first time reported as an intriguing property of the SEP. A regeneration scheme for SEP-M was successfully proposed without any loss of dye removal efficiency. Detailed mechanism studies were carried out to elucidate the nature of dye decolorization. Ion exchange was revealed to play a dominant role in the dye removal process. The current research not only renders a new example for the simple and direct synthesis of SEP but more importantly provides an efficient dye removal methodology. Copyright © 2014 Elsevier B.V. All rights reserved.