Flower shaped homocentric pencil like ZnO nanorod bundles: synthesis, characterisation and study of their photocatalytic activity

Bhuyan, Diganta; Malakar, Banajit; Arbuj, Sudhir S.; Saikia, Lakshi

doi:10.1039/c3ra45818k

Cited by 14 publications

(9 citation statements)

References 32 publications

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“…Alk-ZnO NPs synthesized under optimal conditions exhibited the surface plasmon resonance band shifted to a lower wavelength 310 nm, due to their large excitation binding energy 40 . It is known from absorption spectroscopy that as particle size decreases, the band gap energy increases.…”

Section: Resultsmentioning

confidence: 99%

Statistical optimization of experimental parameters for extracellular synthesis of zinc oxide nanoparticles by a novel haloalaliphilic Alkalibacillus sp.W7

Al-Kordy

Sabry

Mabrouk

2021

Sci Rep

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Green synthesis of zinc oxide nanoparticles (ZnO NPs) through simple, rapid, eco-friendly and an economical method with a new haloalkaliphilic bacterial strain (Alkalibacillus sp. W7) was investigated. Response surface methodology (RSM) based on Box-Behnken design (BP) was used to optimize the process parameters (ZnSO4.7H2O concentration, temperature, and pH) affecting the size of Alkalibacillus-ZnO NPs (Alk-ZnO NPs). The synthesized nanoparticles were characterized using UV–visible spectrum, X-ray diffraction (XRD), Scanning electron microscope-energy dispersive X-ray spectroscopy (SEM–EDX), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and Zeta potential. The UV–Vis spectrum of ZnO NPs revealed a characteristic surface plasmon resonance (SPR) peak at 310 nm. XRD pattern confirmed the hexagonal wurtzite structure of highly pure with a crystallite size 19.5 nm. TEM proved the quasi-spherical shape nanoparticles of size ranging from 1 to 30 nm. SEM–EDX showed spherical shaped and displayed a maximum elemental distribution of zinc and oxygen. FTIR provided an evidence that the biofunctional groups of metabolites in Alkalibacillus sp.W7 supernatant acted as viable reducing, capping and stabilizing agents.

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Section: Resultsmentioning

confidence: 99%

Statistical optimization of experimental parameters for extracellular synthesis of zinc oxide nanoparticles by a novel haloalaliphilic Alkalibacillus sp.W7

Al-Kordy

Sabry

Mabrouk

2021

Sci Rep

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“…1 Additionally, the wurtzite ZnO structure shows a wide band gap and a large exciton binding energy which could lead to lasing action based on exciton recombination even at room temperature. 2,3 Due to the high rate of electron-hole recombination and visible blindness, however, its applications are somewhat restricted. 4,5 In order to enhance the photocatalytic performance with improved light harvesting efficiency, the separation efficiency of photo-induced electron-holes should be boosted.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polymer-coated AgZnO nanoparticles with enhanced photocatalytic activity

et al. 2014

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“…ZnO, Fe 3 O 4 , and Bi 2 O 3 are selected as model metal oxides for the synthesis using the introduced method. The selection was based on their wider environmental photocatalytic applications. − …”

Section: Introductionmentioning

confidence: 99%

Sunlight-Driven Combustion Synthesis of Defective Metal Oxide Nanostructures with Enhanced Photocatalytic Activity

et al. 2019

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Synthesis of metal oxide nanostructures through combustion routes is a promising technique owing to its simplicity, rapidity, scalability, and cost-effectiveness. Herein, a sunlight-driven combustion approach is developed to synthesize pristine metal oxides and their heterostructures. Sunlight, a sustainable energy source, is used not only to initiate the combustion reaction but also to create oxygen vacancies on the metal oxide surface. ZnO nanostructures are successfully synthesized using this novel approach, and the products exhibit higher photocatalytic activity in the decomposition of methyl orange (MO) than ZnO nanostructures synthesized by the conventional methods. The higher photocatalytic activity is due to the narrower band gap, higher porosity, smaller and more uniform particle size, surface oxygen vacancies, as well as the enhanced exciton dissociation efficiency induced by the sunlight. Porous Fe3O4 nanostructures are also prepared using this environmentally benign method. Surprisingly, few-layer Bi2O3 nanosheets are successfully obtained using the sunlight-driven combustion approach. Moreover, the approach developed here is used to synthesize Bi2O3/ZnO heterostructure exhibiting a structure of few-layer Bi2O3 nanosheets decorated with ZnO nanoparticles. Bi2O3 nanosheets and Bi2O3/ZnO heterostructures synthesized by sunlight-driven combustion route exhibit higher photocatalytic activity than their counterparts synthesized by the conventional solution combustion method. This work illuminates a potential cost-effective method to synthesize defective metal oxide nanostructures at scale.

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Flower shaped homocentric pencil like ZnO nanorod bundles: synthesis, characterisation and study of their photocatalytic activity

Cited by 14 publications

References 32 publications

Statistical optimization of experimental parameters for extracellular synthesis of zinc oxide nanoparticles by a novel haloalaliphilic Alkalibacillus sp.W7

Statistical optimization of experimental parameters for extracellular synthesis of zinc oxide nanoparticles by a novel haloalaliphilic Alkalibacillus sp.W7

Synthesis and characterization of polymer-coated AgZnO nanoparticles with enhanced photocatalytic activity

Sunlight-Driven Combustion Synthesis of Defective Metal Oxide Nanostructures with Enhanced Photocatalytic Activity

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