Mechanisms of biochar enhanced Cu2O photocatalysts in the visible-light photodegradation of sulfamethoxazole

Zheng, Meng‐Wei; Yang, Shan-Jen; Pu, Ying‐Chih; Liu, Shou Heng

doi:10.1016/j.chemosphere.2022.135984

Cited by 12 publications

(2 citation statements)

References 64 publications

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“…To study the HRS formation by the BiVO 4 and NiCo 2 O 4 /BiVO 4 photocatalysts under visible-light irradiation, electron paramagnetic resonance (EPR) signals of • O 2 – and • OH radicals were measured using 5,5-dimethyl-1-pyrroline- N -oxide (DMPO) as a radical scavenger (see Figure S1). The six-line characteristic peaks of the DMPO- • O 2 – signals for NiCo 2 O 4 /BiVO 4 can be observed, which may be attributed to the CB of NiCo 2 O 4 /BiVO 4 being more positive than the redox potential of O 2 / • O 2 – (−0.33 V vs NHE). In addition, NiCo 2 O 4 /BiVO 4 has higher DMPO- • OH intensity than BiVO 4 , signifying that the incorporation of NiCo 2 O 4 can improve charge separation for H 2 O 2 and • OH radical generation.…”

Section: Resultsmentioning

confidence: 90%

Nanostructured NiCo₂O₄/BiVO₄ Heterojunctions for Visible-Light Photocatalytic H₂O-to-H₂O₂ Synchronized Organic Pollutant Oxidation

Wei

Liu

Wang

2022

ACS Appl. Nano Mater.

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Photocatalytic H 2 O 2 generation using unlimited solar energy for in situ oxidation of organic pollutants in wastewater has been environmentally attractive. Photocatalytic H 2 O-to-H 2 O 2(aq) reaction by BiVO 4 , however, suffered from relatively low yields (e.g., 24 μM h −1 ) under visible-light irradiation, mainly due to its high recombination rate of charge carriers. Herein, nanostructured NiCo 2 O 4 /BiVO 4 Z-scheme heterojunctions were prepared to increase the oxygen reduction reaction for a higher H 2 O 2 yield rate (than BiVO 4 by 16 times approximately). Additionally, highly reactive superoxide ( • O 2 − ) and hydroxyl ( • OH) radicals from the photocatalytic H 2 O-to-H 2 O 2 process enhanced oxidation of a representative organic pollutant (i.e., methylene blue) under visiblelight irradiation. The photocatalytic oxidation rate constant was as high as 2 × 10 −7 M −1 s −1 . This visible-light photocatalytic H 2 O-to-H 2 O 2 synchronized oxidation of an organic pollutant by the nanostructured NiCo 2 O 4 /BiVO 4 heterojunctions demonstrates the possibility for a potential energy self-sufficient organic wastewater treatment process.

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Section: Resultsmentioning

confidence: 90%

Nanostructured NiCo₂O₄/BiVO₄ Heterojunctions for Visible-Light Photocatalytic H₂O-to-H₂O₂ Synchronized Organic Pollutant Oxidation

Wei

Liu

Wang

2022

ACS Appl. Nano Mater.

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“…Based on this, significant attempts have been made to create photocatalysts with high efficiency, with a focus on copper-containing oxide photocatalysts that can effectively reduce dye contamination. This group of photocatalysts includes CuO, Cu2O, CuFe2O4, CuFeO2, Cu3Nb2O8, CuGaO2 and CuBi2O4 [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Flower-Like CuBi2O4 Microspheres and Its Photocatalytic Activity

Muankaew,

Banphot,

Thammaacheep

et al. 2024

Trends Sci

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In this study, visible-light copper bismuth oxide (CuBi2O4) photocatalyst were synthesized via co-precipitation (CuBi2O4-C) and microwave-assisted methods (CuBi2O4-M). The X-ray powder diffraction (XRD) analysis reveals the presence of pure tetragonal, along with band gaps of 2.9 eV in both samples. The microwave-assisted method produced flower-like CuBi2O4 microspheres, which had a larger BET surface area and demonstrated the highest photocatalytic performance, approximately 83.4 % in the decolorization of malachite green (MG) dye under visible light. Therefore, the research suggested a facile strategy for the fast synthesis of CuBi2O4 microspheres under mild reaction conditions. The use of microwave heat treatment is a faster and more efficient way to photocatalyst materials, while also being cost-effective and energy-saving. HIGHLIGHTS The flower-like CuBi2O4 microspheres synthesized via the microwave-assisted method offer a promising approach for efficient and cost-effective photocatalysis, particularly in the degradation of malachite green dye under visible light. This study highlights the potential of microwave synthesis in enhancing the photocatalytic performance of CuBi2O4 materials GRAPHICAL ABSTRACT

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Rapid Synthesis of Bismuth MOF @Carbon Nanotube Composite by microwave-assisted Solvothermal for Photodegrading RhB

Quang,

Pham,

Van Cuong

et al. 2024

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Mechanisms of biochar enhanced Cu2O photocatalysts in the visible-light photodegradation of sulfamethoxazole

Cited by 12 publications

References 64 publications

Nanostructured NiCo₂O₄/BiVO₄ Heterojunctions for Visible-Light Photocatalytic H₂O-to-H₂O₂ Synchronized Organic Pollutant Oxidation

Nanostructured NiCo₂O₄/BiVO₄ Heterojunctions for Visible-Light Photocatalytic H₂O-to-H₂O₂ Synchronized Organic Pollutant Oxidation

Synthesis of Flower-Like CuBi2O4 Microspheres and Its Photocatalytic Activity

Rapid Synthesis of Bismuth MOF @Carbon Nanotube Composite by microwave-assisted Solvothermal for Photodegrading RhB

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Mechanisms of biochar enhanced Cu2O photocatalysts in the visible-light photodegradation of sulfamethoxazole

Cited by 12 publications

References 64 publications

Nanostructured NiCo2O4/BiVO4 Heterojunctions for Visible-Light Photocatalytic H2O-to-H2O2 Synchronized Organic Pollutant Oxidation

Nanostructured NiCo2O4/BiVO4 Heterojunctions for Visible-Light Photocatalytic H2O-to-H2O2 Synchronized Organic Pollutant Oxidation

Synthesis of Flower-Like CuBi2O4 Microspheres and Its Photocatalytic Activity

Rapid Synthesis of Bismuth MOF @Carbon Nanotube Composite by microwave-assisted Solvothermal for Photodegrading RhB

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Nanostructured NiCo₂O₄/BiVO₄ Heterojunctions for Visible-Light Photocatalytic H₂O-to-H₂O₂ Synchronized Organic Pollutant Oxidation

Nanostructured NiCo₂O₄/BiVO₄ Heterojunctions for Visible-Light Photocatalytic H₂O-to-H₂O₂ Synchronized Organic Pollutant Oxidation