Fabrication of nanostructured CuWO4 for photocatalytic degradation of organic pollutants in aqueous solution

Barzgari, Zahra; Askari, Seyede Zahra; Ghazizadeh, Ali

doi:10.1007/s10854-016-5922-2

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…The calculated photocatalytic reaction rate constant values are compiled in Table 1. These values are in good agreement with those reported in the recent literature for similar reaction conditions [39][40][41][42][43]. The k R value was initially increased with the C 60 loading of the photocatalysts approaching its maximum over the 3C 60 /MCM41 sample.…”

Section: Decolorization Through Photocatalytic Splitting Of Azo-bondssupporting

confidence: 91%

Decolorization of Orange-G Aqueous Solutions over C60/MCM-41 Photocatalysts

et al. 2019

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The majority of the photocatalysts studied for azo-dye degradation are based on semiconductor materials. Studies reported on non-semiconducting materials are very scarce. In the present work, we studied the fullerene (C60) ability to accelerate photodegradation of the dye’s azo bond in the presence of ascorbic acid. A series of C60 supported on ordered mesoporous silica (MCM-41) catalysts, containing 1, 3, 6, 9, and 12 wt % of fullerene C60, was studied using Orange G (OG) as representative azo-dye. This study showed that partial decolorization is achieved in the dark by simple adsorption of the dye on the bare surface of the carrier. The extent of decolorization increases with the irradiation of the suspension due to photocatalytic degradation of the azo-bond. This is maximized over the sample containing 3 wt % of C60 and it has been attributed to the best combination of the extent of the dye adsorption with the high intrinsic photocatalytic activity of small C60 clusters predominated in this sample. This catalyst proved to be quite stable upon five subsequent photocatalytic cycles, losing less than 5% of its initial activity. No degradation of OG takes place in the absence of ascorbic acid.

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Section: Decolorization Through Photocatalytic Splitting Of Azo-bondssupporting

confidence: 91%

Decolorization of Orange-G Aqueous Solutions over C60/MCM-41 Photocatalysts

et al. 2019

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“…88-0269). 45,46 Furthermore, it was found that these diffraction peaks which originated from TiO 2 did not shift because of the introduction of CuWO 4 when compared with those shown in the XRD pattern of Ti 3 C 2 /TiO 2 . However, it was also found that the diffraction peaks of CuWO 4 did not shift when compared with those shown in the XRD pattern of the pure CuWO 4 nanoparticles (Fig.…”

Section: Resultsmentioning

confidence: 95%

An efficient photocatalytic system composed of Ti₃C₂ quantum dots incorporated in TiO₂ nanosheets and CuWO₄ nanoparticles: fabrication and its photocatalytic activity for H₂ production

et al. 2023

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“…[10] Besides, nanocrystalline CuWO 4 materials were used as the photo-catalysts in the degradation of organic pollutants from aqueous through sunlight irradiation. [11] To the best of our knowledge; only one report is found in literature regarding supercapacitors based on CuWO 4 , while electrolysis of water by CuWO 4 has not been reported till yet. We believe that CuWO 4 nanostructures have great interest in electrolysis of water for renewable and clean energy sources.…”

Section: Introductionmentioning

confidence: 99%

Molten Salts Derived Copper Tungstate Nanoparticles as Bifunctional Electro‐Catalysts for Electrolysis of Water and Supercapacitor Applications

et al. 2018

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Herein, we report molten salts derived, cube‐shaped CuWO4 nanoparticles (50±5 nm) as multi‐functional catalysts in electrochemical and photo‐electrochemical studies. The formation of pure phase cube‐shaped CuWO4 nanoparticles (CWO‐NPs) is analyzed by X‐ray diffraction, Raman spectroscopy, X‐ray photo‐electron spectroscopy (XPS) and field‐emission electron microscopy (FE‐SEM and FE‐TEM). CWO‐NPs show remarkable bi‐functional electro‐catalytic behavior for the oxygen evolution (OER) and oxygen reduction reactions (ORR) in 1.0 M KOH electrolyte solution. Polarization studies of CWO‐NPs exhibit low over‐potential (∼260 mV) at 1 mA/cm2 and low Tafel slope value (∼190 mV/dec) for OER compared to bulk or other oxides. Polarization studies with controlled electrode rotation reveal a four‐electron pathway for the water electrolysis reaction for OER/ORR. In addition, CWO‐NPs show promising capacitive behavior with specific capacitance values of ∼230 F/g using 1 M KOH electrolyte. Galvanostatic charge‐discharge (GCD) studies of CWO‐NPs displays low energy loss during discharge time for 50 segments. To further investigate the potential for industrial applications, the stability of the electrodes is also examined using chrono‐amperometry (CA) at fixed potential, chrono‐potentiometry (CP) at fixed current density, and cyclic voltammetry (CV) with 50 cycles.

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Fabrication of nanostructured CuWO4 for photocatalytic degradation of organic pollutants in aqueous solution

Cited by 13 publications

References 31 publications

Decolorization of Orange-G Aqueous Solutions over C60/MCM-41 Photocatalysts

Decolorization of Orange-G Aqueous Solutions over C60/MCM-41 Photocatalysts

An efficient photocatalytic system composed of Ti₃C₂ quantum dots incorporated in TiO₂ nanosheets and CuWO₄ nanoparticles: fabrication and its photocatalytic activity for H₂ production

Molten Salts Derived Copper Tungstate Nanoparticles as Bifunctional Electro‐Catalysts for Electrolysis of Water and Supercapacitor Applications

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Fabrication of nanostructured CuWO4 for photocatalytic degradation of organic pollutants in aqueous solution

Cited by 13 publications

References 31 publications

Decolorization of Orange-G Aqueous Solutions over C60/MCM-41 Photocatalysts

Decolorization of Orange-G Aqueous Solutions over C60/MCM-41 Photocatalysts

An efficient photocatalytic system composed of Ti3C2 quantum dots incorporated in TiO2 nanosheets and CuWO4 nanoparticles: fabrication and its photocatalytic activity for H2 production

Molten Salts Derived Copper Tungstate Nanoparticles as Bifunctional Electro‐Catalysts for Electrolysis of Water and Supercapacitor Applications

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An efficient photocatalytic system composed of Ti₃C₂ quantum dots incorporated in TiO₂ nanosheets and CuWO₄ nanoparticles: fabrication and its photocatalytic activity for H₂ production