期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 165, 期 -, 页码 2462-2474出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.10.148
关键词
Chitosan; Methyl orange; TiO2
资金
- Malaysian Ministry of Education (MOE) under Fundamental Research Grant Scheme [203/PKIMIA/6711228]
- MyPhd Scholarship
The removal of methyl orange(MO) dye has been studied using TiO2/chitosan-montmorillonite (TiO2/Cs-MT) bilayer photocatalyst which also functions as an adsorbent. The dye removal experiments were conducted in the dark and under UV-Vis light irradiation via adsorption and photocatalysis-adsorption processes, respectively. The adsorption modelings were employed on the dark experimental data and compared with the immobilized and suspended Cs-Mt counterparts. It was found that the bilayer photocatalyst closely followed the adsorption properties of immobilized Cs-Mt which obeyed the pseudo-second-order kinetic and film diffusion models. Fluorescent analysis revealed that the charge separation was enhanced in the presence of Cs-Mt as a sub-layer of TiO2. Under light irradiation, the photocatalytic activity of TiO2/Cs-MT corresponded to its adsorption counterpart trend and was optimized at pH 6.5 and 20mgL(-1) of MOdye solution. High removal efficiency and synergism of MOby TiO2/Cs-MT over TiO2 single layerwere observed throughout the 10 cycles of application due to contribution of adsorption of Cs-Mt sub-layer and photocatalysis by TiO2 top layer. (C) 2020 Elsevier B.V. All rights reserved.
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