화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.50, 162-171, June, 2017
DOI10.1016/j.jiec.2017.02.010  Export Citation
Simulated visible light photocatalytic degradation of Congo red by TiO2 coated magnetic polyacrylamide grafted carboxymethylated chitosan
N.A. Abdelwahab†, and F.M. Helaly
  • Department of Polymers and Pigments, National Research Centre, 33 El Bohouth St., Dokki, Giza, P.O. 12622, Egypt
E-mail:
Carboxymethyl chitosan was prepared, grafted with polyacrylamide in the presence of synthesized Fe3O4 nanoparticles and coated with TiO2 (TMPAM-g-CMC). Synthesized materials were characterized using FT-IR spectra, XRD, EDX, SEM, TEM, BET surface area, UV.vis/DRS and PL spectra. MPAM- -CMC and TMPAM-g-CMC were comparatively investigated for decolorization of Congo red dye solution under visible light irradiation. The effect of various experimental parameters on the decolorization rate was investigated. MPAM-g-CMC and TMPAM-g-CMC showed decolorization rate, 55.4% and 99.2% after 90 and 180 min, respectively. Photocatalytic decolorization follows pseudo-first-order according to Langmiur.Hinshelwood (L.H) model. The decolorization rate by TMPAM-g-CMC attained 92.4% after eight repetitive cycles that confirmed its stability.
Keywords:Photocatalysis;Congo red;Grafted chitosan;TiO2 coating;Visible light
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