Combined Adsorption/Photocatalytic dye removal by copper-titania-fly ash composite
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-F...
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Main Authors: | , , , |
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Format: | Article |
Language: | English |
Published: |
Elsevier Ltd.
2020
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Subjects: | |
Online Access: | http://ir.unimas.my/id/eprint/29768/1/Abstract_Devagi%202020_Surfaces%20%26%20Interfaces.png http://ir.unimas.my/id/eprint/29768/ https://www.sciencedirect.com/science/article/pii/S2468023020300316#! |
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Summary: | 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. |
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