Synthesis of ZnWO4 nanorods: the photocatalytic effects on RhB dye degradation upon irradiation with sunlight light

Selvamani, Muthamizh; Alsulmi, Ali; Sundaramoorthy, Arunmetha; Vadivel, Siva; Kesavan, Arul Varman

doi:10.1007/s10854-023-11513-4

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…The contamination of water is caused by a variety of pollutants, including inorganic (salts, caustic metal ions, and metal oxides) and organic (pesticides, fertilizers, phenol, and dyes) pollutants, agricultural runoff, and so on [4][5][6]. The methods for removing organic matter can be distinctly separated into three groups: (i) physical, (ii) chemical, and (iii) biological, which include precipitation [7], ion exchange [8], sonochemical degradation [9], adsorption [10], and various advanced oxidation process techniques such as Fenton [11], photo-Fenton [12], photocatalysis [13], etc.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of Flower-like MnMoO4 Nanostructures and Their Photocatalytic Performance

Selvamani,

Kesavan,

Arulraj

et al. 2024

Materials

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This article describes an affordable method for the synthesis of MnMoO4 nanoflowers through the microwave synthesis approach. By manipulating the reaction parameters like solvent, pH, microwave power, and irradiation duration along this pathway, various nanostructures can be acquired. The synthesized nanoflowers were analyzed by using a powder X-ray diffractometer (XRD), field emission scanning electron microscopy (FE-SEM) with energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and UV–vis diffuse reflectance spectroscopy (UV–DRS) to determine their crystalline nature, morphological and functional group, and optical properties, respectively. X-ray photoelectron spectroscopy (XPS) was performed for the examination of elemental composition and chemical states by qualitative and quantitative analysis. The results of the investigations demonstrated that the MnMoO4 nanostructures with good crystallinity and distinct shape were formed successfully. The synthesized MnMoO4 nanoflowers were tested for their efficiency as a photocatalyst in the degradation studies of methylene blue (MB) as model organic contaminants in an aqueous medium under visible light, which showed their photocatalytic activity with a degradation of 85%. Through the band position calculations using the electronegative value of MnMoO4, the photocatalytic mechanism of the nanostructures was proposed. The results indicated that the effective charge separation, and transfer mechanisms, in addition to the flower-like shape, were responsible for the photocatalytic performance. The stability of the recovered photocatalyst was examined through its recyclability in the degradation of MB. Leveraging MnMoO4’s photocatalytic properties, future studies may focus on scaling up these processes for practical and large-scale environmental remediation.

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Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of Flower-like MnMoO4 Nanostructures and Their Photocatalytic Performance

Selvamani,

Kesavan,

Arulraj

et al. 2024

Materials

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Two-stage hydrothermal process driven visible light sensitive photocatalytic m-ZnWO4/m-WO3 heterojunction composite materials

Sahoo,

Rebekah,

Lee

2024

APL Materials

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The current study reports on the facile two-step hydrothermal synthesis of heterojunction m-ZnWO4/m-WO3 composite powders for visible light sensitive photocatalytic applications. The ZnWO4 particles start crystallizing on the surface of the WO3 powder in the second stage of the reaction in a basic medium. The phases of the composite powders were confirmed using x-ray diffraction analysis. The monoclinic cubic shaped WO3 and rod shaped ZnWO4 morphologies were disclosed from the field emission scanning electron microscope images. Strong interfacial adhesion between ZnWO4 and WO3 was unveiled from the high-resolution transmission electron microscopy study. The optimized composite 5ZW exhibits a calculated bandgap of 2.58 eV, positioning it within the visible light wavelength range (λ = 400–700 nm). Furthermore, there is a notable enhancement in the average lifetime of the electron–hole pair recombination rate, which is extended to 30.3 ns. The composite 5ZW demonstrated 96% methylene blue dye degradation efficiency within 420 min under visible light irradiation at pH 12. Due to the optimal phase fraction and strong interfacial adhesion between ZnWO4 and WO3, the heterojunction scheme seemed to be highly efficient in the 5ZW composite. Hence, it is believed that a two-step hydrothermal method can be a proficient route to prepare heterojunction composites m-ZnWO4/m-WO3 in alkali conditions with visible light active photodegradation efficiency.

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Synthesis of ZnWO4 nanorods: the photocatalytic effects on RhB dye degradation upon irradiation with sunlight light

Cited by 2 publications

References 37 publications

Microwave-Assisted Synthesis of Flower-like MnMoO4 Nanostructures and Their Photocatalytic Performance

Microwave-Assisted Synthesis of Flower-like MnMoO4 Nanostructures and Their Photocatalytic Performance

Two-stage hydrothermal process driven visible light sensitive photocatalytic m-ZnWO4/m-WO3 heterojunction composite materials

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