Microwave-assisted synthesis of ZnO nanoparticles using different capping agents and their photocatalytic application

Mageswari, Kumar; Prabukanthan, Peethambaram; Madhavan, Jagannathan

doi:10.1007/s11356-022-25097-9

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…A broad absorption peak centered at approximately 390 nm was the characteristic of the Semal-ZnO NP formation in the range of 350–400 nm and was attributed to the binding of various capping molecules with the ZnO NPs, resulting in increased bandgap ( Figure 1A ) ( Abdelbaky et al, 2022 ; Sharma et al, 2022 ; Ramesh et al, 2023 ). The absorption peak observed in this study may be attributed to the intrinsic bandgap formed by electron transitions from the valence band (E V ) to the conduction band (E C ) of the Semal-ZnO NPs ( Mageswari et al, 2023 ). This peak confirms the efficient synthesis of Semal-ZnO NPs from B. ceiba (Semal) leaf extract.…”

Section: Resultsmentioning

confidence: 69%

Green route to fabrication of Semal-ZnO nanoparticles for efficient solar-driven catalysis of noxious dyes in diverse aquatic environments

Lal,

Gour,

Dave

et al. 2024

Front. Chem.

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This work successfully demonstrates a sustainable and environmentally friendly approach for synthesizing Semal-ZnO nanoparticles (NPs) using the aqueous leaf extract of Bombax ceiba L. These NPs exhibit an absorption peak at approximately 390 nm in the UV-visible spectrum and an energy gap (Eg) of 3.11 eV. Detailed analyses of the morphology and particle size using various spectroscopic and microscopic techniques, XRD, FE-SEM with EDS, and HR-TEM reveal crystallographic peaks attributable to the hexagonal phase, with an average crystal size of 17 nm. The Semal-ZnO NPs also exhibit a notable photocatalytic efficiency for degrading methylene blue (MB) and methyl orange (MO) under sunlight in different water samples collected from diverse natural sources, indicating that they are promising photocatalysts for environmental remediation. The photocatalytic efficiency of the biofabricated Semal-ZnO NPs is impressive, exhibiting a photodegradation rate of up to 99% for MB and 79% for MO in different water samples under exposure to sunlight. The novel phytofabricated Semal-ZnO NPs are thus a beacon of hope for the environment, with their desirable photocatalytic efficiency, pseudo-first-order kinetics, and ability to break down noxious dye pollutants in various aquatic environments.

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Section: Resultsmentioning

confidence: 69%

Green route to fabrication of Semal-ZnO nanoparticles for efficient solar-driven catalysis of noxious dyes in diverse aquatic environments

Lal,

Gour,

Dave

et al. 2024

Front. Chem.

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“…Undeniably, the method of preparation strongly influences the photocatalytic activity of the material. Various chemical and physical techniques have been employed to produce ZnO nanostructures, including the sol–gel method [ 33 , 34 ], hydrothermal process [ 1 , 11 ], spray-pyrolysis [ 35 ], solid-state reaction technique [ 36 ], and the microwave method [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Co Doping on the Physical Properties and Organic Pollutant Photodegradation Efficiency of ZnO Nanoparticles for Environmental Applications

Saadi,

Khaldi,

Pina

et al. 2024

Nanomaterials

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This paper presents a comprehensive investigation of the synthesis and characterization of Zn1−xCoxO (0 ≤ x ≤ 0.05) nanopowders using a chemical co-precipitation approach. The structural, morphological, and vibrational properties of the resulting ZnO nanostructures were assessed through X-ray diffraction, scanning electronic microscopy, and Raman spectroscopy to examine the influence of cobalt doping. Remarkably, a notable congruence between the experimental results and the density functional theory (DFT) calculations for the Co-doped ZnO system was achieved. Structural analysis revealed well-crystallized hexagonal wurtzite structures across all samples. The SEM images demonstrated the formation of spherical nanoparticles in all the samples. The vibrational properties confirmed the formation of a hexagonal wurtzite structure, with an additional Raman peak corresponding to the F2g vibrational mode characteristic of the secondary phase of ZnCo2O4 observed at a 5% cobalt doping concentration. Furthermore, a theoretical examination of cobalt doping’s impact on the elastic properties of ZnO demonstrated enhanced mechanical behavior, which improves stability, recyclability, and photocatalytic activity. The photocatalytic study of the synthesized compositions for methylene blue (MB) dye degradation over 100 min of UV light irradiation demonstrated that Co doping significantly improves photocatalytic degradation. The material’s prolonged lifetime, reduced rate of photogenerated charge carrier recombination, and increased surface area were identified as pivotal factors accelerating the degradation process. Notably, the photocatalyst with a Zn0.99Co0.01O composition exhibited exceptional efficiency compared to that reported in the literature. It demonstrated high removal activity, achieving an efficiency of about 97% in a shorter degradation time. This study underscores the structural and photocatalytic advancements in the ZnO system, particularly at lower cobalt doping concentrations (1%). The developed photocatalyst exhibits promise for environmental applications owing to its superior photocatalytic performance.

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Role of natural extracts on the synthesis and properties of semiconductor nanoparticles of ZnO applied in water treatment by photocatalytic processes

Quevedo Robles,

Santana Camacho,

Vilchis Nestor

et al. 2024

J Mater Sci: Mater Electron

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Microwave-assisted synthesis of ZnO nanoparticles using different capping agents and their photocatalytic application

Cited by 3 publications

References 46 publications

Green route to fabrication of Semal-ZnO nanoparticles for efficient solar-driven catalysis of noxious dyes in diverse aquatic environments

Green route to fabrication of Semal-ZnO nanoparticles for efficient solar-driven catalysis of noxious dyes in diverse aquatic environments

Effect of Co Doping on the Physical Properties and Organic Pollutant Photodegradation Efficiency of ZnO Nanoparticles for Environmental Applications

Role of natural extracts on the synthesis and properties of semiconductor nanoparticles of ZnO applied in water treatment by photocatalytic processes

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