Combined Adsorption/Photocatalytic dye removal by copper-titania-fly ash composite

Kanakaraju, Devagi and Muhamad Hazim, Ya and Lim, Ying-Chin and Pace, Andrea (2020) Combined Adsorption/Photocatalytic dye removal by copper-titania-fly ash composite. Surfaces and Interfaces, 19 (100534). pp. 1-8. ISSN 2468-0230

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Abstract

Achieving both photocatalytic efficiency and adsorption capacity is essential to produce a highly efficient photocatalyst. This study fabricated a new photocatalyst by combining copper (Cu) doped titanium dioxide (TiO2) with fly ash (FA). The photocatalysts were synthesized using mild acid (acid-FA/Cu/TiO2), base (base-FA/ Cu/TiO2), and deionized water (rFA/Cu/TiO2) activated FA. EDX confirmed the inclusion of Cu in both Cu/TiO2 and FA/Cu/TiO2 composites. XRD analysis indicated the presence of the anatase form of TiO2 after Cu doping and incorporation into modified FA. All three FA/Cu/TiO2 composites demonstrated high absorption (UV and visible region) compared to their TiO2 and Cu/TiO2 counterparts based on the diffuse reflectance UV-Vis spectra. Complete removal of methyl orange under UV and 99.1% removal under visible light irradiation were attained using 1.5 g/L base-FA/Cu/TiO2. Both dark and irradiation phases demonstrated the synergistic role of adsorption TiO2 composites to ensure the removal of dye in water.

Item Type: Article
Uncontrolled Keywords: Waste, Wastewater, Photocatalysis, Adsorption, Doping, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak.
Subjects: Q Science > QD Chemistry
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Kanakaraju
Date Deposited: 21 May 2020 09:35
Last Modified: 30 Mar 2021 03:43
URI: http://ir.unimas.my/id/eprint/29768

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