Novel indigo-dye-doped graphene-supported Mn/WO<sub>3</sub>nanocomposite as visible light photocatalyst for degradation of methylene blue dye

Ahmad, Manzoor; Khan, Muhammad Yousaf; Sadaf, Sana; Iqbal, Saleem; Nawaz, Faisal; Iqbal, Javed

doi:10.1088/2053-1591/ab071b

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…These vibrations appearing at 1630cm -1 may also indicate adsorbed water molecules and unoxidized graphitic domains (Hou et al, 2020) A very small peak is visible at 947 cm −1 in Mn-doped ternary composite as compared to undoped ternary sample, which is ascribed to Mn-O vibrations as confirmed from previous studies (Ahmad et al, 2019). Besides, the peak intensity is reduced in the doped ternary composite, which supports the successful insertion of dopant ions into the host material.…”

Section: Ftir Analysissupporting

confidence: 74%

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Tahir

Zahid

Bhatti

et al. 2021

Environ Sci Pollut Res

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The increase in environmental pollution has led to an increased investigation in the development of novel ternary photocatalytic systems for remediation. These Photocatalytic systems exhibit superior photocatalytic action for the removal of pollutants because of their visible light active bandgaps. A highly effective visible light active ternary heterojunction was fabricated using a hydrothermal method assisted by ultrasonication. Herein, we report the Insitu hydrothermal synthesis of Mn-doped Bi2WO6-GO/ MoS2 photocatalyst, efficiently exhibiting greater photocatalytic activity for the wastewater treatment under solar light. The binary metal sulphide (MoS2) used as a co-catalyst, acted as electron collector and Graphene oxide (GO) as a support material for interfacial electron transfer to and from bismuth tungstate and MoS2. The as-prepared samples were characterized using SEM-EDX, FT-IR, XRD, XPS, and UV-Vis techniques. The bandgap of the novel photocatalyst was found in the visible region (2.2 eV) which helped in suppressing photoinduced electron-hole pairs recombination. The ternary Mn-BMG showed 99% methylene blue removal after 60 minutes of sunlight irradiation at the optimum conditions of pH 8, catalyst dose 50 mg/100ml and initial MB concentration of 10ppm under sunlight irradiation. The Mn-BMG has proved to be an effective sunlight active photocatalyst that can be reused without substantial loss in photocatalytic efficiency.

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Section: Ftir Analysissupporting

confidence: 74%

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Tahir

Zahid

Bhatti

et al. 2021

Environ Sci Pollut Res

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“…The formation of a nanocomposite of WO 3 with manganese oxides is also a way to reduce the bandgap of tungsten oxide. The constitution of composite with Mn, indigo dye and reduced graphene oxide (RGO) was investigated by Ahmad et al [416] as visible light photocatalyst for methylene blue (MB) dye removal. A synergetic association between WO 3 and RGO was observed which increased the rate of charge transfer and limited the recombination of electron-hole pairs in the nanosized composite.…”

Section: Zno-womentioning

confidence: 99%

Tungsten-Based Catalysts for Environmental Applications

2021

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This review aims to give a general overview of the recent use of tungsten-based catalysts for wide environmental applications, with first some useful background information about tungsten oxides. Tungsten oxide materials exhibit suitable behaviors for surface reactions and catalysis such as acidic properties (mainly Brønsted sites), redox and adsorption properties (due to the presence of oxygen vacancies) and a photostimulation response under visible light (2.6–2.8 eV bandgap). Depending on the operating condition of the catalytic process, each of these behaviors is tunable by controlling structure and morphology (e.g., nanoplates, nanosheets, nanorods, nanowires, nanomesh, microflowers, hollow nanospheres) and/or interactions with other compounds such as conductors (carbon), semiconductors or other oxides (e.g., TiO2) and precious metals. WOx particles can be also dispersed on high specific surface area supports. Based on these behaviors, WO3-based catalysts were developed for numerous environmental applications. This review is divided into five main parts: structure of tungsten-based catalysts, acidity of supported tungsten oxide catalysts, WO3 catalysts for DeNOx applications, total oxidation of volatile organic compounds in gas phase and gas sensors and pollutant remediation in liquid phase (photocatalysis).

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Facile Synthesis of CdO–ZnO Nanocomposites for Photocatalytic Application in Visible Light

et al. 2023

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Novel indigo-dye-doped graphene-supported Mn/WO₃nanocomposite as visible light photocatalyst for degradation of methylene blue dye

Cited by 8 publications

References 32 publications

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Tungsten-Based Catalysts for Environmental Applications

Facile Synthesis of CdO–ZnO Nanocomposites for Photocatalytic Application in Visible Light

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Novel indigo-dye-doped graphene-supported Mn/WO3nanocomposite as visible light photocatalyst for degradation of methylene blue dye

Cited by 8 publications

References 32 publications

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Tungsten-Based Catalysts for Environmental Applications

Facile Synthesis of CdO–ZnO Nanocomposites for Photocatalytic Application in Visible Light

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Novel indigo-dye-doped graphene-supported Mn/WO₃nanocomposite as visible light photocatalyst for degradation of methylene blue dye