Photocatalytic performance of a novel semiconductor nanocatalyst: Copper doped nickel oxide for phenol degradation

Ethiraj, Anita Sagadevan; Uttam, Prateek; Varunkumar, K.; Chong, Kwok Feng; Ali, Gomaa A. M.

doi:10.1016/j.matchemphys.2019.122520

Cited by 64 publications

(16 citation statements)

References 77 publications

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“…Upon applying optimal experimental conditions, an 80% degradation rate achieved within 60 min was observed in Figure 4 a,b. The following formula calculates the degradation efficiency [ 70 , 71 , 72 , 73 ]:

where

is the initial concentration of CR, and

is the immediate concentration.…”

Section: Resultsmentioning

confidence: 99%

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Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

et al. 2021

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In this study, silver/silver oxide nanoparticles (Ag/Ag2O NPs) were successfully biosynthesized using Phoenix dactylifera L. aqueous leaves extract. The effect of different plant extract/precursor contractions (volume ratio, v/v%) on Ag/Ag2O NP formation, their optical properties, and photocatalytic activity towards azo dye degradation, i.e., Congo red (CR) and methylene blue (MB), were investigated. X-ray diffraction confirmed the crystalline nature of Ag/Ag2O NPs with a crystallite size range from 28 to 39 nm. Scanning electron microscope images showed that the Ag/Ag2O NPs have an oval and spherical shape. UV–vis spectroscopy showed that Ag/Ag2O NPs have a direct bandgap of 2.07–2.86 eV and an indirect bandgap of 1.60–1.76 eV. Fourier transform infrared analysis suggests that the synthesized Ag/Ag2O NPs might be stabilized through the interactions of -OH and C=O groups in the carbohydrates, flavonoids, tannins, and phenolic acids present in Phoenix dactylifera L. Interestingly, the prepared Ag/Ag2O NPs showed high catalytic degradation activity for CR dye. The photocatalytic degradation of the azo dye was monitored spectrophotometrically in a wavelength range of 250–900 nm, and a high decolorization efficiency (84.50%) was obtained after 50 min of reaction. As a result, the use of Phoenix dactylifera L. aqueous leaves extract offers a cost-effective and eco-friendly method.

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where

is the initial concentration of CR, and

is the immediate concentration.…”

Section: Resultsmentioning

confidence: 99%

“…Upon applying optimal experimental conditions, an 80% degradation rate achieved within 60 min was observed in Figure 4a,b. The following formula calculates the degradation efficiency [70][71][72][73]:…”

Section: Photocatalytic Activity Of Ag/ag 2 O Nps For Azo Dye Degradationmentioning

confidence: 99%

Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

et al. 2021

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“…In order to measure the catalytic activity, this nanocomposite retains cyclic stability after six cycles of use due to its unique magnetic properties. Cu doped nickel oxide nanocatalysts exhibited a phenol removal rate of about 85.7% from dermal industrial wastewater within 150 min [ 41 ]. This is because, on the one hand, doping of Cu can induce oxygen vacancy, which can be used as the NiO surface site for water dissociation.…”

Section: Removal Of Organic Compoundsmentioning

confidence: 99%

Recent Advances of Photocatalytic Application in Water Treatment: A Review

et al. 2021

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Photocatalysis holds great promise as an efficient and sustainable oxidation technology for application in wastewater treatment. Rapid progress developing novel materials has propelled photocatalysis to the forefront of sustainable wastewater treatments. This review presents the latest progress on applications of photocatalytic wastewater treatment. Our focus is on strategies for improving performance. Challenges and outlooks in this promising field are also discussed. We hope this review will help researchers design low-cost and high-efficiency photocatalysts for water treatment.

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“…The photocatalytic degradation shows that 98.92, 98.00, 98.00 and 97.95% of rhodamine B, nonylphenol ethoxylates, pseudoephedrine hydrochloride, and nicotine was decomposed by Mg-doped TiO2, respectively. Ethiraj et al [24] studied for the first time the photodegradation of phenol by the Cu-NiO. The nanocatalyst efficiency for phenol removal was tested in real leather industrial wastewater effluent which could remove about 85.7% within 150 min.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Co addition for improved photocatalytic properties of ZnO nanoparticles (NPs)

Moulahi

2021

Egypt. J. Chem.

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In this study, undoped ZnO and rod-like Co-doped ZnO nanoparticles (NPs) were successfully synthesized via one step polyol method. In this paper, Zn(NO3)2.6H2O was used as a precursor and Co(NO3)2.6H2O was the dopant. The morphology, structure, crystalline size and optical properties of the undoped and Co doped ZnO were measured in detail. The incorporation of the Co 2+ in ZnO matrix was confirmed by DRX, ICP and EDX. Optical characterization of the sample revealed that the band gap energy (Eg) decreased from 3.36 to 3.25 eV with an increase in Co 2+ doping concentration. The photocatalytic activity of the synthesized nanoparticles (NPs) was studied with respect to pure and Co-doped ZnO concentrations (0-10% Co). The improvement of photocatalytic activity has been noticed with the increase of Co concentration in ZnO nanoparticles.

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Photocatalytic performance of a novel semiconductor nanocatalyst: Copper doped nickel oxide for phenol degradation

Cited by 64 publications

References 77 publications

Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

Green Synthesized of Ag/Ag2O Nanoparticles Using Aqueous Leaves Extracts of Phoenix dactylifera L. and Their Azo Dye Photodegradation

Recent Advances of Photocatalytic Application in Water Treatment: A Review

Co addition for improved photocatalytic properties of ZnO nanoparticles (NPs)

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