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Immobilization of titanium dioxide on PAN fiber as a recyclable photocatalyst via co-dispersion solvent dip coating

Immobilization of titanium dioxide on PAN fiber as a recyclable photocatalyst via co-dispersion... Abstract Polyacrylonitrile (PAN) fiber coated with photocatalyst titanium dioxide (P25) was successfully fabricated by a dip coating process using dimethyl sulfoxide (DMSO)/ethanol (EtOH) as co-dispersion solvent. Photocatalytic performance of P25-coated PAN fibers was evaluated by degrading a model dye rhodamine B (RhB) in aqueous solution under ultraviolet (UV) light irradiation. The preparation parameters of P25-coated PAN fibers were optimized by an orthogonal design, and were found to be a P25 concentration of 0.05 g/L, a ratio of 85/15 (v/v) DMSO/EtOH, and a take-up speed of 0.5 m/min. A possible mechanism of co-dispersion solvent dip coating was proposed based on Hansen solubility parameters’ theory. The P25-coated PAN fibers prepared at the optimum conditions had high dye removal efficiency. They also showed an excellent cycling performance for dye removal of up to 99% recovery over several cycles. The coating process has little impact on both the fiber strength and the breaking strength. The breaking strength of P25-coated PAN fibers was maintained even after several cycles. This study provides an easy-to-scale-up method for preparing P25-coated PAN fibers. The obtained P25-coated PAN fibers show great potential as a low-cost, easy handling, and recyclable photocatalyst for dye effluent treatment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Textile Research Journal SAGE

Immobilization of titanium dioxide on PAN fiber as a recyclable photocatalyst via co-dispersion solvent dip coating

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References (44)

Publisher
SAGE
Copyright
© The Author(s) 2016
ISSN
0040-5175
eISSN
1746-7748
DOI
10.1177/0040517516632479
Publisher site
See Article on Publisher Site

Abstract

Abstract Polyacrylonitrile (PAN) fiber coated with photocatalyst titanium dioxide (P25) was successfully fabricated by a dip coating process using dimethyl sulfoxide (DMSO)/ethanol (EtOH) as co-dispersion solvent. Photocatalytic performance of P25-coated PAN fibers was evaluated by degrading a model dye rhodamine B (RhB) in aqueous solution under ultraviolet (UV) light irradiation. The preparation parameters of P25-coated PAN fibers were optimized by an orthogonal design, and were found to be a P25 concentration of 0.05 g/L, a ratio of 85/15 (v/v) DMSO/EtOH, and a take-up speed of 0.5 m/min. A possible mechanism of co-dispersion solvent dip coating was proposed based on Hansen solubility parameters’ theory. The P25-coated PAN fibers prepared at the optimum conditions had high dye removal efficiency. They also showed an excellent cycling performance for dye removal of up to 99% recovery over several cycles. The coating process has little impact on both the fiber strength and the breaking strength. The breaking strength of P25-coated PAN fibers was maintained even after several cycles. This study provides an easy-to-scale-up method for preparing P25-coated PAN fibers. The obtained P25-coated PAN fibers show great potential as a low-cost, easy handling, and recyclable photocatalyst for dye effluent treatment.

Journal

Textile Research Journal – SAGE

Published: Aug 5, 2016

Keywords: photocatalytic; dye removal; fiber; dip coating; titanium dioxide

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