Zinc oxide mediated sonophotocatalytic degradation of phenol in water

Anju, S.G.; Yesodharan, Suguna; Yesodharan, E.P.

doi:10.1016/j.cej.2012.02.032

Cited by 162 publications

(75 citation statements)

References 58 publications

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“…US-UV catalyzed is process useful for deagglomeration of catalyst particles. This effect may be useful for enhancing numbers active sites for photocatalysis process and more numbers of the additional sites for bubble defragmentation for sonocatalysis (Anju et al 2012). Thus, there is multi-fold increased in hydroxyl radical's for US-UV effect compare to individual effects of US or UV.…”

Section: Effect Of Zinc Oxidementioning

confidence: 93%

“…Selection of optimum concentration of solid particle is essential because at higher concentration of solid particles may decrease the degradation rate due to the scattering effects and attenuation of incident sound energy. Photocatalytic activity depends on the optimum of the concentration of catalyst loadings (Anju et al 2012). Optimum concentration for decolorization of BG was 3, 3 and 2 g/L for US, UV, and US-UV, respectively, and results of decolorization of BG are shown in Fig.…”

Section: Effect Of Copper Oxidementioning

confidence: 99%

“…Catalyst activity, and the surface area of catalyst (fragmentation of catalyst particles is due to US effects) were increased for combination effect of US and UV. Another advantage of US-UV is the continuous cleaning of catalyst surface (Ertugay and Acar 2014;Kumar et al 2015;Anju et al 2012). The increase in the population of hydroxyl radicals may lead to higher decolorization of BG.…”

Section: Effect Of Zinc Oxidementioning

confidence: 99%

“…Perforation of UV irradiation is limited to few millimeters' in the aqueous liquid. To overcome these limitations, immersed lamp position type photocatalytic reactor is recommended for increasing perforation depth of UV light (Anju et al 2012;Bouanimba et al 2015). The significant shortfall with both oxidation processes is a local concentration of irradiation effect.…”

Section: Introductionmentioning

confidence: 99%

“…This dye is commonly used for various applications, typically in paper industries (Ertugay and Acar 2014;Kumar et al 2015;Anju et al 2012). BG is highly toxic and recalcitrant compound and it poses a danger to human and aquatic biota due to mutagenic and carcinogenic effects (Sood et al 2015;Khuntia et al 2015;Shambharkar and Chowdhury 2016;Raval et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Decolorization of brilliant green dye using immersed lamp sonophotocatalytic reactor

Gole

Priya²,

Danao³

2017

Appl Water Sci

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The textile and dye industries require an enormous amount of water for processing and produce a large volume of wastewater. Generated wastewater had potential hazards and a threat to the aquatic biota. The present work investigates the decolorization of brilliant green dye using a combination of two advanced oxidation techniques viz sonocatalysis and photocatalysis (immersed lamp) known as sonophotocatalysis (3 L capacity). The efficiency of decolorization is further improved in the presence of various additives viz. copper oxide, zinc oxide, and sodium chloride. The maximum decolorization of brilliant green (BG) (94.8% in 120 min) obtained in the presence of zinc oxide. The total organic carbon of the treated samples was measured to monitor complete mineralization of BG. The sonophotocatalytic process (in the presence of zinc oxide) shows maximum mineralization. Synergic combination of two oxidation processes increased the production of oxidizing radicals. Continuous cleaning of catalyst surface (due to sonolysis effect) improves the activity of the catalyst for photolysis operation. The present work is highly useful for the development of a sonophotocatalytic process.

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Section: Effect Of Zinc Oxidementioning

confidence: 93%

Section: Effect Of Copper Oxidementioning

confidence: 99%

Section: Effect Of Zinc Oxidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Decolorization of brilliant green dye using immersed lamp sonophotocatalytic reactor

Gole

Priya²,

Danao³

2017

Appl Water Sci

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Sonophotocatalytic treatment of diazinon using visible light‐driven Ce:Cu‐1,4‐BDOAH₂ photocatalyst in a batch‐mode process: Response surface methodology and optimization

Taghipour

Karimipour

Ghaedi

et al. 2017

Applied Organom Chemis

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Cu-1,4-benzenedioxyacetic acid (Cu-1,4-BDOAH 2 ) with a narrow band gap (2.52 eV) was synthesized and doped with Ce to afford Ce:Cu-1,4-BDOAH 2 as an efficient photocatalyst with narrower band gap (2.39 eV). The prepared Cu-1,4-BDOAH 2 and Ce:Cu-1,4-BDOAH 2 were characterized using Fourier transform infrared, energy-dispersive X-ray, diffuse reflectance spectroscopies, scanning electron microscopy and X-ray diffraction. The sonophotocatalytic degradation of diazinon was carried out in a batch-mode reactor using visible light-driven Ce:Cu-1,4-BDOAH 2 photocatalyst as well as ultrasonic irradiation.The narrow band gap of the photocatalyst means that it can be activated under visible light illumination. The effects of operational parameters such as initial diazinon concentration (5-25 mg l −1 ), pH (2-10), photocatalyst dosage (10-30 mg) and irradiation time (10-30 min) on the sonophotocatalytic degradation efficiency were investigated using central composite design under response surface methodology. The optimization process was studied using desirability function and the results indicated 99.8% degradation, which was obtained at optimum values of 25 mg l −1 , 6, 20 mg and 20 min for the initial concentration of diazinon, pH, photocatalyst dosage and irradiation time, respectively. Reusability experiments of Ce:Cu-1,4-BDOAH 2 photocatalyst showed that it is quite stable with excellent catalytic activity even after five cycles.

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Enhancement of Wastewater Treatment Using Mist and Photocatalyst

et al. 2023

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Advanced oxidation processes are attractive methods for treating wastewater containing refractory organic substances. Hybrid reactors utilizing mist generated by ultrasound and photocatalysts have been proposed to enhance pollutant removal. However, the functions of ultraviolet, ultrasound, mist, and photocatalyst in the hybrid reactor have not been clarified. The aim of this study is to investigate these functions by comparing the pollutant removal performance under different operating conditions. The results indicate that the application of ultraviolet, ultrasound, and photocatalyst is necessary to utilize mist as a reaction field. A synergistic effect of the simultaneous application was observed in the hybrid reactor.

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Zinc oxide mediated sonophotocatalytic degradation of phenol in water

Cited by 162 publications

References 58 publications

Decolorization of brilliant green dye using immersed lamp sonophotocatalytic reactor

Decolorization of brilliant green dye using immersed lamp sonophotocatalytic reactor

Sonophotocatalytic treatment of diazinon using visible light‐driven Ce:Cu‐1,4‐BDOAH₂ photocatalyst in a batch‐mode process: Response surface methodology and optimization

Enhancement of Wastewater Treatment Using Mist and Photocatalyst

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Zinc oxide mediated sonophotocatalytic degradation of phenol in water

Cited by 162 publications

References 58 publications

Decolorization of brilliant green dye using immersed lamp sonophotocatalytic reactor

Decolorization of brilliant green dye using immersed lamp sonophotocatalytic reactor

Sonophotocatalytic treatment of diazinon using visible light‐driven Ce:Cu‐1,4‐BDOAH2 photocatalyst in a batch‐mode process: Response surface methodology and optimization

Enhancement of Wastewater Treatment Using Mist and Photocatalyst

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Product

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Sonophotocatalytic treatment of diazinon using visible light‐driven Ce:Cu‐1,4‐BDOAH₂ photocatalyst in a batch‐mode process: Response surface methodology and optimization