Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

Mageshwari, K.; Ramakrishnan, S.; Lee, Jun Young; Park, Jinsub

doi:10.1016/j.apsusc.2015.06.027

Cited by 30 publications

(7 citation statements)

References 29 publications

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“…The basic principle of the latter method depends mainly on suppressing the recombination amid the photoinduced charges as well as enhancing the charges’ speed . g-C 3 N 4 could be mixed with various materials like phosphides, selenides, oxides, and sulfides as adequate semiconductors to construct heterojunctions of advanced photocatalytic performance. − On the other hand, owing to the admirable properties possessed by CuCr 2 O 4 such as confined band gap energy (1.40 eV), it was used as a successful semiconductor of p-type for diverse photocatalytic applications like supercapacitors, ceramic pigments, photocatalytic decomposition of some pollutants, some selective conversion reactions, and photocatalytic hydrogen generation. − Consequently, the construction of heterojunctions made of g-C 3 N 4 nanosheets decorated with diverse CuCr 2 O 4 proportions is expected to introduce an advanced photocatalyst that is capable of absorbing a large quantity of visible light when illuminated, separating effectively the induced charges and enhancing the photocatalytic reaction rate.…”

Section: Introductionmentioning

confidence: 99%

Generation of Hydrogen Gas Using CuCr₂O₄-g-C₃N₄ Nanocomposites under Illumination by Visible Light

Mohamed

Kadi

2021

ACS Omega

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In this research, nanocomposites made of CuCr 2 O 4 -g-C 3 N 4 accommodating distinct contents of CuCr 2 O 4 (1–4 wt %) nanoparticles (NPs) were endorsed for hydrogen gas production after illumination by visible light in the presence of aqueous glycerol solution. The ultrasonication-mixture method was applied to assure the homogeneous distribution of CuCr 2 O 4 NPs over synthesized mesoporous g-C 3 N 4 . Such nanocomposites possess suppressed recombination between the photoinduced charges. High-resolution transmission electron microscopy and X-ray photoelectron spectroscopy examinations affirmed the formation of CuCr 2 O 4 -g-C 3 N 4 heterojunctions. The separation between the induced charges and the photocatalytic performance with the CuCr 2 O 4 NP amount were investigated. The CuCr 2 O 4 -g-C 3 N 4 heterojunction of 3 wt % CuCr 2 O 4 content was documented as the optimal heterojunction. Upgraded hydrogen gas generation was attained over the optimal heterojunction with the extent of ten and thirty times as those registered for pure CuCr 2 O 4 and g-C 3 N 4 specimens, respectively, under illumination by visible light. The photocatalytic performance acquired by the diverse synthesized specimens was assessed not only by their effectiveness to absorb light in the visible region but also by their potential to separate the photoinduced charges.

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Section: Introductionmentioning

confidence: 99%

Generation of Hydrogen Gas Using CuCr₂O₄-g-C₃N₄ Nanocomposites under Illumination by Visible Light

Mohamed

Kadi

2021

ACS Omega

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“…Similar observation is made by Mageshwari et al in the case of a CuCr 2 O 4 -embedded CuO nanocomposite. 31 The photoactivity of the composite is tested for the degradation of methyl orange (MO). During irradiation, the MO solution turns colorless, and the UV–vis spectra recorded initially, after 90 and 120 min, are given in Figure 8.…”

Section: Resultsmentioning

confidence: 99%

Integrated Approach for Hazardous Cr(VI) Removal: Reduction, Extraction, and Conversion into a Photoactive Composite, CuO/CuCr₂O₄

Gopal

Gupta

2019

ACS Omega

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The present study reports on CuO-assisted reduction of Cr(VI) under ambient conditions using sodium borohydride and its complete removal. The confirmation of the reductive removal of Cr(VI) was assisted by powder X-ray diffraction, Fourier transform infrared, scanning electron microscopy, mic absorption spectro, UV–vis, and UV–vis–diffuse reflectance spectroscopy techniques. The analysis revealed that the process involved adsorption of dichromate ion on the surface of copper oxide, reduction of Cr(VI), and precipitation of Cr(III) as its hydroxide. Cr(VI) reduction capacity of CuO was found to be around 27.2 mmol/(g h). The residue collected showed promising reusability for 3 to 4 cycles, and the exhausted residue was finally converted into a black composite, CuO/CuCr2O4. The composite showed positive response for the photodegradation of methyl orange. Thus, the current protocol proposed a complete package of cost-effective reduction of Cr(VI) to Cr(III), precipitation into its hydroxide, and the conversion of the residue into a photoactive composite.

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“…In the last decades, advanced oxidation processes, including both homogenous and heterogeneous catalysis, have been frequently employed to remove a wide range of inorganic and organic contaminants from water and wastewater [9][10][11]. Various semiconducting metal oxides have been successfully utilized as heterogeneous catalysts for the photoassisted degradation of dye pollutants [12][13][14][15][16][17][18][19]. Among them, zinc oxide (ZnO) [20][21][22] and titanium dioxide (TiO 2 ) [3,23,24] have received particular attention thanks to their non-toxicity, chemical stability, biocompatibility, and low-cost.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue Dye by Electrospun Binary and Ternary Zinc and Titanium Oxide Nanofibers

Petrovičovà

Dahrouch²,

Triolo

et al. 2021

Applied Sciences

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Synthetic dyes, dispersed in water, have harmful effects on human health and the environment. In this work, Ti and/or Zn oxide nanofibers (NFs) with engineered architecture and surface were produced via electrospinning followed by calcination. Calcination and subsequent cooling were operated at fast rates to generate porous NFs with capture centers to reduce the recombination rate of the photogenerated charges. After morphological and microstructural characterisation, the NFs were comparatively evaluated as photocatalysts for the removal of methylene blue from water under UV irradiation. The higher band gap and lower crystallinity were responsible for the lower photocatalytic activity of the ternary oxides (ZnTiO3 and Zn2TiO4) towards the degradation of the dye. The optimal loads of the highly performing binary oxides were determined. By using 0.66 mg mL−1 wurtzite ZnO for the discoloration of an aqueous solution with a dye concentration of 15 µM, a higher rate constant (7.94 × 10−2 min−1) than previously reported was obtained. The optimal load for anatase TiO2 was lower (0.33 mg mL−1). The corresponding rate constant (1.12 × 10−1 min−1) exceeds the values reported for the commonly used P25–TiO2 benchmark. The catalyst can be reused twice without any regeneration treatment, with 5.2% and 18.7% activity decrease after the second and third use, respectively.

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Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

Cited by 30 publications

References 29 publications

Generation of Hydrogen Gas Using CuCr₂O₄-g-C₃N₄ Nanocomposites under Illumination by Visible Light

Generation of Hydrogen Gas Using CuCr₂O₄-g-C₃N₄ Nanocomposites under Illumination by Visible Light

Integrated Approach for Hazardous Cr(VI) Removal: Reduction, Extraction, and Conversion into a Photoactive Composite, CuO/CuCr₂O₄

Photocatalytic Degradation of Methylene Blue Dye by Electrospun Binary and Ternary Zinc and Titanium Oxide Nanofibers

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Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

Cited by 30 publications

References 29 publications

Generation of Hydrogen Gas Using CuCr2O4-g-C3N4 Nanocomposites under Illumination by Visible Light

Generation of Hydrogen Gas Using CuCr2O4-g-C3N4 Nanocomposites under Illumination by Visible Light

Integrated Approach for Hazardous Cr(VI) Removal: Reduction, Extraction, and Conversion into a Photoactive Composite, CuO/CuCr2O4

Photocatalytic Degradation of Methylene Blue Dye by Electrospun Binary and Ternary Zinc and Titanium Oxide Nanofibers

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Product

Resources

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Generation of Hydrogen Gas Using CuCr₂O₄-g-C₃N₄ Nanocomposites under Illumination by Visible Light

Generation of Hydrogen Gas Using CuCr₂O₄-g-C₃N₄ Nanocomposites under Illumination by Visible Light

Integrated Approach for Hazardous Cr(VI) Removal: Reduction, Extraction, and Conversion into a Photoactive Composite, CuO/CuCr₂O₄