Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst
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 p...
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| Format: | Article |
| Language: | English |
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Elsevier
2020
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| Online Access: | http://psasir.upm.edu.my/id/eprint/89402/ http://psasir.upm.edu.my/id/eprint/89402/1/DYE.pdf |
| _version_ | 1848860845781549056 |
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| author | Baharudin, Noor Nazihah Nawi, Mohd Asri Zainal, Zulkarnain |
| author_facet | Baharudin, Noor Nazihah Nawi, Mohd Asri Zainal, Zulkarnain |
| author_sort | Baharudin, Noor Nazihah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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 20 mg L−1 of MO dye solution. High removal efficiency and synergism of MO by TiO2/Cs–MT over TiO2 single layer were observed throughout the 10 cycles of application due to contribution of adsorption of Cs–Mt sub-layer and photocatalysis by TiO2 top layer. |
| first_indexed | 2025-11-15T12:51:43Z |
| format | Article |
| id | upm-89402 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T12:51:43Z |
| publishDate | 2020 |
| publisher | Elsevier |
| recordtype | eprints |
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| spelling | upm-894022021-08-18T09:53:39Z http://psasir.upm.edu.my/id/eprint/89402/ Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst Baharudin, Noor Nazihah Nawi, Mohd Asri Zainal, Zulkarnain 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 20 mg L−1 of MO dye solution. High removal efficiency and synergism of MO by TiO2/Cs–MT over TiO2 single layer were observed throughout the 10 cycles of application due to contribution of adsorption of Cs–Mt sub-layer and photocatalysis by TiO2 top layer. Elsevier 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/89402/1/DYE.pdf Baharudin, Noor Nazihah and Nawi, Mohd Asri and Zainal, Zulkarnain (2020) Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst. International Journal of Biological Macromolecules, 165 (pt. B). 2462 - 2474. ISSN 0141-8130; ESSN: 1879-0003 https://www.sciencedirect.com/science/article/pii/S0141813020347942 10.1016/j.ijbiomac.2020.10.148 |
| spellingShingle | Baharudin, Noor Nazihah Nawi, Mohd Asri Zainal, Zulkarnain Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst |
| title | Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst |
| title_full | Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst |
| title_fullStr | Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst |
| title_full_unstemmed | Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst |
| title_short | Insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using TiO2/chitosan based photocatalyst |
| title_sort | insight into the synergistic photocatalytic-adsorptive removal of methyl orange dye using tio2/chitosan based photocatalyst |
| url | http://psasir.upm.edu.my/id/eprint/89402/ http://psasir.upm.edu.my/id/eprint/89402/ http://psasir.upm.edu.my/id/eprint/89402/ http://psasir.upm.edu.my/id/eprint/89402/1/DYE.pdf |