Title
Simulated visible light photocatalytic degradation of Congo red by TiO2 coated magnetic polyacrylamide grafted carboxymethylated chitosan
Author
N.A. Abdelwahab, F.M. Helaly
Year
2017
Journal
Journal of Industrial and Engineering Chemistry
Abstract
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-g-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.
Instrument
FP-8600
Keywords
Fluorescence, Photoluminescence, Materials