Water-based immobilized Ag-doped TiO₂ photocatalyst for photocatalytic degradation of RR4 dye / Nureel Imanina Abdul Ghani … [et al.]

Abdul Ghani, Nureel Imanina and Rosli, Muhammad Afiq and Hamzah, Siti Raihan and Natar, Nadiah Sabihah and Nazeri, Nur Syazana and Ab Aziz, Syahirul Ikhwan and Mohamad, Sarina and Wan Ismail, Wan Izhan Nawawi (2022) Water-based immobilized Ag-doped TiO₂ photocatalyst for photocatalytic degradation of RR4 dye / Nureel Imanina Abdul Ghani … [et al.]. Science Letters (ScL), 16 (2): 16. pp. 24-39. ISSN (eISSN): 2682-8626


This study used water-based preparation of immobilised Ag-TiO2 using the DSAT technique to avoid solvent interference of Ag-TiO2 photocatalytic performance. The preparation of Ag-TiO2 was conducted via the photodeposition method with silver nitrate (AgNO3) as Ag precursor at various ratios of Ag dopant to TiO2. The immobilisation of Ag-TiO2 was prepared via water-based immobilisation using the DSAT method, and XRD and FESEM-EDX characterised the obtained photocatalyst. The photocatalytic performance of Ag-TiO2 was measured by photocatalytic degradation of Reactive Red 4 (RR4) dye. The optimum photocatalytic performance of suspension mode Ag-TiO2 was obtained at 3 % of Ag-TiO2. Sample 3 % Ag-TiO2 was applied under immobilisation mode with complete degradation of 30 mg/L RR4 dye achieved within 60 min under 55 W fluorescent lamp irradiation. It is 36 % faster compared to immobilised, unmodified TiO2. The acquired results from FESEM-EDX indicated the presence of 0.6 % Ag on the Ag-TiO2 photocatalyst sample. The photodegradation rate of immobilized 3 % Ag-TiO2 sample under different solvents has shown the different values among all where it was 0.096 > 0.037 > 0.029 > 0.029 > 0.025 min-1 for water-base, ethanol, methanol, dichloromethane and acetone respectively. Thus, the solvents can influence the photocatalytic performance of the immobilised 3 % Ag-TiO2 photocatalyst by molecular interference between Ag-doped in TiO2. The water-based immobilised 3 % Ag-TiO2 sample also has a sustainable performance where the photocatalytic activities are comparable to 10 cycles.


Item Type: Article
Email / ID Num.
Abdul Ghani, Nureel Imanina
Rosli, Muhammad Afiq
Hamzah, Siti Raihan
Natar, Nadiah Sabihah
Nazeri, Nur Syazana
Ab Aziz, Syahirul Ikhwan
Mohamad, Sarina
Wan Ismail, Wan Izhan Nawawi
Subjects: T Technology > TP Chemical technology > Paints, pigments, varnishes, etc.
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Applied Sciences
Journal or Publication Title: Science Letters (ScL)
UiTM Journal Collections: UiTM Journal > Science Letters (ScL)
ISSN: (eISSN): 2682-8626
Volume: 16
Number: 2
Page Range: pp. 24-39
Keywords: Photocatalysis, Titanium dioxide, Silver
Date: June 2022
URI: https://ir.uitm.edu.my/id/eprint/63178
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