Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles

Yousefi, Ramin; Jamali‐Sheini, Farid; Cheraghizade, Mohsen; Khosravi, Sara; Saáedi, Abdolhossein; Huang, Nay Ming; Basirun, Wan Jefrey; Azarang, Majid

doi:10.1016/j.mssp.2015.01.013

Cited by 162 publications

(41 citation statements)

References 26 publications

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“…This phenomenon will reduce the photocatalytic activity. Similar results have been reported by Lee et al [55] and Yousefi et al [56]. Further, in our co-precipitation technique, the thermodynamic solubility is less for higher doping concentration of Mg into ZnO.…”

Section: Resultssupporting

confidence: 91%

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Raj

Sadaiyandi²,

Kennedy³

et al. 2018

Nanoscale Res Lett

240

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In this research, a facile co-precipitation method was used to synthesize pure and Mg-doped ZnO nanoparticles (NPs). The structure, morphology, chemical composition, and optical and antibacterial activity of the synthesized nanoparticles (NPs) were studied with respect to pure and Mg-doped ZnO concentrations (0–7.5 molar (M) %). X-ray diffraction pattern confirmed the presence of crystalline, hexagonal wurtzite phase of ZnO. Scanning electron microscope (SEM) images revealed that pure and Mg-doped ZnO NPs were in the nanoscale regime with hexagonal crystalline morphology around 30–110 nm. Optical characterization of the sample revealed that the band gap energy (Eg) decreased from 3.36 to 3.04 eV with an increase in Mg2+ doping concentration. Optical absorption spectrum of ZnO redshifted as the Mg concentration varied from 2.5 to 7.5 M. Photoluminescence (PL) spectra showed UV emission peak around 400 nm. Enhanced visible emission between 430 and 600 nm with Mg2+ doping indicated the defect density in ZnO by occupying Zn2+ vacancies with Mg2+ ions. Photocatalytic studies revealed that 7.5% Mg-doped ZnO NPs exhibited maximum degradation (78%) for Rhodamine B (RhB) dye under UV-Vis irradiation. Antibacterial studies were conducted using Gram-positive and Gram-negative bacteria. The results demonstrated that doping with Mg ions inside the ZnO matrix had enhanced the antibacterial activity against all types of bacteria and its performance was improved with successive increment in Mg ion concentration inside ZnO NPs.

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Section: Resultssupporting

confidence: 91%

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Raj

Sadaiyandi²,

Kennedy³

et al. 2018

Nanoscale Res Lett

240

View full text Add to dashboard Cite

show abstract

“…Amongst the different methods of synthesis of ZnO nanostructures, the sol-gel method is attractive for its simplicity and environmentfriendly conditions. Sol-gel preparation of solid catalysts has been reported by many research groups [16][17][18][19][20]. Using this method, the crystal grain can develop completely and the particle size is uniform.…”

Section: Introductionmentioning

confidence: 99%

Multiple-layered structure of obelisk-shaped crystalline nano-ZnO prepared by sol–gel route

2015

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Zinc oxide nanopowders were synthesized by the simple sol-gel method from an ethanol solution of zinc nitrate hexahydrate. Structural and surface morphological investigations were carried out using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible (UV-Vis) spectrophotometry analyses. XRD pattern showed that the zinc oxide nanoparticles exhibited hexagonal wurtzite structure. A multiple-layered structure of obelisk-shaped ZnO nanoparticles was achieved after calcinations. The average particle size of ZnO was around 20 nm as estimated by direct HRTEM observation. The size of sphere-like shaped ZnO nanoparticles was measured in the range of 20-80 nm and the size of pyramid-like shaped annealed samples was achieved in the range of 40-100 nm with less agglomeration. The energy dispersive spectroscopy spectrum showed peaks of zinc and oxygen. The sharp peaks in FTIR spectrum determined the Zn-O stretching and absorbance peak of UV-Vis spectrum showed the wide bandgap energy of 3.35 eV.

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“…The present obtained results are compared with the results available in literatures [39][40][41][42][43][44][45][46][47][48][49][50] (table 2). It is clearly evident that the degradation time depends on the ratio of ZnO nanocatalyst dose (mg) to dye dose (mg), size and shape of nanoparticles (table 2).…”

Section: Photodegradation Of Methyl Orange (Mo)mentioning

confidence: 54%

Waste to wealth: a solution to textile dyes related pollution

Narasaiah

Mandal

2020

Mater. Res. Express

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This study describes biosynthesis of Zinc oxide nanoparticles (ZnO NPs) using agro-waste durva grass aqueous extract without uses of any hazardous chemicals and stabilizing agents. Surface plasmon resonance (SPR) band of the synthesized ZnO NPs confirmed its conversion from its metal salt to NPs by UV-vis spectroscopy. Characterization of functional groups in durva grass aqueous extract and ZnO NPs surfaces were identified by Fourier transform infrared spectroscopy (FTIR), purity and crystallinity by power x-ray diffraction analysis (XRD), size and morphology by transmission electron microscopy analysis (TEM), elemental composition by Energy Dispersive x-ray spectroscopy (EDAX), stability by thermogravimetric analysis (TGA) and dynamic light scattering (DLS) study. The synthesized ZnO NPs was highly stable with average particle size of 17 nm. The photocatalytic activity of ZnO NPs was studied under UV irradiation to methylene blue (MB) and methyl orange (MO) degradation (10 mg l −1 each). 98.1% of MB was degraded within 60 min, while 97.5% of MO within 100 min. In addition, antioxidant activity of ZnO NPs showed 91.8% free radical scavenging capacity at the dose of 250 mg l −1 which implies its importance in biomedical applications.

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Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles

Cited by 162 publications

References 26 publications

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Multiple-layered structure of obelisk-shaped crystalline nano-ZnO prepared by sol–gel route

Waste to wealth: a solution to textile dyes related pollution

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