The fabrication of a Co<sub>3</sub>O<sub>4</sub>/graphene oxide (GO)/polyacrylonitrile (PAN) nanofiber membrane for the degradation of Orange II by advanced oxidation technology

Zhang, Hao; Liu, Weihua; Tian, Feng; Tang, Zhongfeng; Lin, Hua‐Tay

doi:10.1039/c9ra06656j

Cited by 8 publications

(2 citation statements)

References 41 publications

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“…17 Zhang et al reported Co 3 O 4 nanoparticles and graphene in synergistic effect as catalysts for the degradation of Orange II dye. 18 The T h i s c o n t e n t i s 19 Recently, some attempts have been made to promote the catalytic efficiency of Co 3 O 4 . 20 To make oxide semiconductors sensitive to visible light and to raise the electronic-hole pair separation efficiency, the semiconductor was assembled with designed materials to form heterojunctions.…”

Section: Introductionsupporting

confidence: 54%

“…Dai et al investigated the synthesis of nanocrystalline In 2 O 3 and reported its photocatalytic properties . Zhang et al reported Co 3 O 4 nanoparticles and graphene in synergistic effect as catalysts for the degradation of Orange II dye . The association of Co 3 O 4 nanoparticles and the graphene sheets was reported to provide superior catalytic performance over pure Co 3 O 4 .…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal Microwave Synthesis of Co₃O₄/In₂O₃ Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Nan

Guo

Alhashmialameer

et al. 2022

ACS Appl. Nano Mater.

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Co3O4/In2O3 nanocomposites were prepared via a microwave-hydrothermal method and directly used as photoanodes for the photoelectrocatalytic (PEC) process to reduce Cr(VI). The as-prepared Co3O4/In2O3 composites show a rod-like structure, which is composed of nanoparticles. The PEC experiments indicated that after 120 min of irradiation with 0.7 V bias voltage and visible light, the Cr(VI) reduction efficiency of Co3O4/In2O3 composites in aqueous solution was 100%, which was superior to the samples prepared by other methods. Moreover, the Co3O4/In2O3 composite still had a high catalytic activity after five runs of PEC experiments. Elimination experiments demonstrate that photo-generated electrons (e–) performed a key role in the catalytic reduction of Cr(VI). The significantly improved PEC performance can be attributed to the bias voltage and the p-n heterojunction formed between Co3O4 and In2O3. Therefore, Co3O4/In2O3 nanocomposites have a considerable potential for the PEC reduction of Cr(VI).

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Section: Introductionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Hydrothermal Microwave Synthesis of Co₃O₄/In₂O₃ Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Nan

Guo

Alhashmialameer

et al. 2022

ACS Appl. Nano Mater.

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Effortless Fabrication of Bi₂O₃‐Co₃O₄ Nanocomposite Catalyst: Harnessing Photocatalytic Power for Efficient Cationic Dye Degradation

Pradhan,

Nayak,

Kanar

et al. 2024

ChemistrySelect

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A cost‐effective and simple co‐precipitation approach was used to create an efficient photocatalyst Co3O4‐Bi2O3 with identical stoichiometry (1 : 1 of both Co3O4 and Bi2O3). XRD, FTIR, TEM, SEM‐EDS, XPS, UV‐DRS, PL, BET, and TGA were used to characterize the produced material‘s structural and optical properties. The presence of a single phase spinel structure with a distinctive plane (311) was verified by the XRD peak of 2 at 36.9° for Co3O4‐Bi2O3. The SEM pictures revealed clustered consolidated spheres, suggesting particle homogeneity and high interconnectedness. The HR‐TEM and SAED pictures revealed an average crystallite size of 28 nm for the Co3O4‐Bi2O3 heterojunction. The UV‐DRS spectral data demonstrated a 2.1 eV reduction in band gap energy for Co3O4‐Bi2O3 (whereas Co3O4 is 2.4 eV and Bi2O3 is 2.7 eV). Under solar light irradiation, pristine Co3O4, Bi2O3, and Co3O4‐Bi2O3 composites were investigated for photocatalytic degradation of Methylene Blue (MB) and Malachite green (MG) dyes. By adjusting factors such as pH, starting dye concentration, catalyst dosage, and agitation duration, the optimal efficiency was determined. The acquired results showed Co3O4‐Bi2O3 ′s superior activity over both precursors. The composite obtained maximal degradation of 98 % (at pH=11) and 97 % (at pH=9) for MB and MG, respectively. The enhanced photo degradation activity of Co3O4‐Bi2O3 can be due to larger visible light absorption, increased surface area, and decreased h+/e− recombination. The reactive species trapping study was performed to determine the importance of superoxide and hydroxyl radicals during photo degradation. Dye degradation was governed by a pseudo‐first‐order kinetic model. The reusability and stability of Co3O4‐Bi2O3 were confirmed by utilizing the same material for five consecutive runs with both MB and MG dyes. Mass spectra analysis provided insights into the successful degradation of dyes, elucidating intermediate products. The synthesized Co3O4‐Bi2O3 nanocomposite offers unrivalled advantages in terms of structural and optical properties, superior photocatalytic activity, and remarkable stability, making it a promising candidate for efficient dye degradation applications without the formation of toxic by‐products.

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Polyethylenimine Grafted Chitosan Nanofiber Membrane as Adsorbent for Selective Elimination of Anionic Dyes

et al. 2020

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The fabrication of a Co₃O₄/graphene oxide (GO)/polyacrylonitrile (PAN) nanofiber membrane for the degradation of Orange II by advanced oxidation technology

Abstract: Treating water that has been polluted with chemical dyes is an important task related to water resources.

Cited by 8 publications

References 41 publications

Hydrothermal Microwave Synthesis of Co₃O₄/In₂O₃ Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Hydrothermal Microwave Synthesis of Co₃O₄/In₂O₃ Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Effortless Fabrication of Bi₂O₃‐Co₃O₄ Nanocomposite Catalyst: Harnessing Photocatalytic Power for Efficient Cationic Dye Degradation

Polyethylenimine Grafted Chitosan Nanofiber Membrane as Adsorbent for Selective Elimination of Anionic Dyes

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The fabrication of a Co3O4/graphene oxide (GO)/polyacrylonitrile (PAN) nanofiber membrane for the degradation of Orange II by advanced oxidation technology

Abstract: Treating water that has been polluted with chemical dyes is an important task related to water resources.

Cited by 8 publications

References 41 publications

Hydrothermal Microwave Synthesis of Co3O4/In2O3 Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Hydrothermal Microwave Synthesis of Co3O4/In2O3 Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Effortless Fabrication of Bi2O3‐Co3O4 Nanocomposite Catalyst: Harnessing Photocatalytic Power for Efficient Cationic Dye Degradation

Polyethylenimine Grafted Chitosan Nanofiber Membrane as Adsorbent for Selective Elimination of Anionic Dyes

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The fabrication of a Co₃O₄/graphene oxide (GO)/polyacrylonitrile (PAN) nanofiber membrane for the degradation of Orange II by advanced oxidation technology

Hydrothermal Microwave Synthesis of Co₃O₄/In₂O₃ Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Hydrothermal Microwave Synthesis of Co₃O₄/In₂O₃ Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

Effortless Fabrication of Bi₂O₃‐Co₃O₄ Nanocomposite Catalyst: Harnessing Photocatalytic Power for Efficient Cationic Dye Degradation