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

Abstract

Textile dyeing wastewater becomes one of the root causes of environmental pollution. Titanium dioxide (TiO 2 ) is one of the photocatalysts that shows prominent organic dye photodegradation ability. In this study, a porous tungsten oxide (WO 3 )/ TiO 2 composite was prepared through ultrasonic-assisted solvothermal technique with varying amounts of WO 3 ranging from 0.25 to 5 weight % (wt.%). The prepared 0.50 wt.% WO 3 /TiO 2 (0.50WTi) composite exhibited the highest photodegradation activity (4.39 × 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 (IC 50 ) were 1 mg.mL −1 and 0.61 mg.mL −1 (24 and 72 h of incubations) for the 0.50WTi composite.

The Optimization of Silica-Based Composite Membrane from Volcanic Ash of Mount Sinabung, Titanium Dioxide, and Polyvinyl Alcohol for River Water Treatment through Photocatalyst Process

“…Photocatalysis is a chemical reaction that happens in the interaction between light and a photocatalyst. Due to its efficacy and adaptability, photocatalytic degradation has become an increasingly attractive solution for water pollution concerns [3][4]. Photocatalysts are a favorable method in treating dirty water and textile waste.…”

Degradation of AB113 using combined photocatalysis and biological processes: Economic choice and enhanced removal of aromatic compounds

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