Photodegradation assessment of RB5 dye by utilizing WO3/TiO2 nanocomposite: a cytotoxicity study

Chau, Jenny Hui Foong and Lee, Kian Mun and Pang, Yean Ling and Abdullah, Badariah and Juan, Joon Ching and Leo, Bey Fen and Lai, Chin Wei (2022) Photodegradation assessment of RB5 dye by utilizing WO3/TiO2 nanocomposite: a cytotoxicity study. Environmental Science and Pollution Research, 29 (15). pp. 22372-22390. ISSN 0944-1344, DOI

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Textile dyeing wastewater becomes one of the root causes of environmental pollution. Titanium dioxide (TiO2) is one of the photocatalysts that shows prominent organic dye photodegradation ability. In this study, a porous tungsten oxide (WO3)/TiO2 composite was prepared through ultrasonic-assisted solvothermal technique with varying amounts of WO3 ranging from 0.25 to 5 weight % (wt.%). The prepared 0.50 wt.% WO3/TiO2 (0.50WTi) composite exhibited the highest photodegradation activity (4.39 x 10(-2) min(-1)) and complete mineralization in chemical oxygen demand (COD) reading towards 30 mg.L-1 of Reactive Black 5 (RB5) dye under 60 min of light irradiation. Effects of large surface area, small crystallite size, high pore volume and size, and low electron-hole pair recombination rate attributed to the superiority of 0.50WTi. Besides, 0.50WTi could be reused, showing 86.50% of RB5 photodegradation at the fifth cycle. Scavenger study demonstrated that photogenerated hole (h(+)) was the main active species of 0.50WTi to initiate the RB5 photodegradation. Cytotoxicity assessment determined the readings of half-maximal inhibitory concentration (IC50) were 1 mg.mL(-1) and 0.61 mg.mL(-1) (24 and 72 h of incubations) for the 0.50WTi composite.

Item Type: Article
Funders: Fundamental Research Grant Scheme [Grant No; FRGS/1/2020/TK0/UM/02/8] [No; FP0232020], Global Collaborative Programme - SATU Joint Research Scheme [Grant No; ST004-2021]
Uncontrolled Keywords: WO3/TiO2; Ultrasonic-assisted; Solvothermal; Photoelectrochemical; Photodegradation; RB5; Dye; Cytotoxicity
Subjects: R Medicine > R Medicine (General)
R Medicine > R Medicine (General) > Medical technology
Divisions: Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 10 Oct 2023 08:14
Last Modified: 10 Oct 2023 08:14

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