Synthesis of Flowerlike g‐C<sub>3</sub>N<sub>4</sub>/BiOBr with Enhanced Visible Light Photocatalytic Activity for Dye Degradation

Jiang, Man; Shi, Yanbiao; Huang, Jingwei; Wang, Lei; She, Houde; Tong, Jinhui; Su, Bitao; Wang, Qizhao

doi:10.1002/ejic.201800110

Cited by 54 publications

(12 citation statements)

References 41 publications

(45 reference statements)

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“…Rapid industrialization and a global economy are the reasons behind numerous contradictory human-environment interactions like pollution, which occur time and again, degrading the quality of life on the planet. [1][2][3] Oil spills have now become common worldwide due to the alarming increase in exploitation, production and transportation of crude oil to meet human needs. 4 Crude oil, a complex mixture of saturated and unsaturated hydrocarbons, poses detrimental threats to human and environmental health and well-being.…”

Section: Introductionmentioning

confidence: 99%

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Mohan

Lim

Lee

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: BTEX removal is attracting increased attention owing to the detrimental impacts caused to human health, the foremost being neurological impairments. Thus, this study intended to assess the efficiency of zinc-ferrite/V 2 O 5 (ZFV) nanocomposite for photocatalytic degradation of BTEX isomers in aqueous solution. Furthermore, the developed catalyst was magnetically separable, which may reduce the ecological impacts of the catalyst. RESULTS: The ZFV nanocomposite was prepared by a solvothermal process using V 2 O 5 (extracted from treated E-waste) and zincferrite (synthesized through a chemical co-precipitation method). The integration of elements in the ZFV nanocomposite was confirmed using powder X-ray diffraction, Fourier transform infrared, Raman, diffuse reflectance and electrochemical impedance spectroscopies and scanning electron microscopy. Maximum BTEX degradation of 95% was achieved at 50 mg L −1 initial BTEX concentration, 0.50 g L −1 catalyst and pH 3. A minor decrease in the degradation efficiency (10%) of the catalyst was observed at the fifth cycle. The presence of H 2 O 2 increased the degradation efficiency to 98% owing to the prevention of electron-hole recombination, while NaCl (60%), Na 2 CO 3 (63%), NaNO 3 (80%) and Na 2 SO 4 (72%) decreased the degradation efficiency due to their hydroxyl scavenging properties. The degradation pathway was elucidated using gas chromatography with mass spectral studies. CONCLUSIONS: The findings of the present study relating to BTEX degradation using the magnetic ZFV nanocomposite and the degradation mechanism throw light on the environmental applications of the ZFV composite. The composite could be an alternative for the remediation of BTEX-contaminated wastewaters.

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Section: Introductionmentioning

confidence: 99%

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Mohan

Lim

Lee

et al. 2020

J of Chemical Tech & Biotech

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“…For DUPG, 532.41 eV is considered to [MO] initial : 10 mg dm À 3 ; volume: 100 ml; 400 nm < λ < 680 nm); (b)Changes in XRD before and after five cycles be surface-adsorbed H 2 O, while the peak of DUPG/BiOBr-0.5 shifts to lower binding energy, mainly due to lattice oxygen and hydroxyl groups, which facilitate photocatalytic reactions. [38] Accordingly, as shown in the figure, at the binding energy of 158.92 and 164.22 eV, the Bi 4f spectrum can be decomposed into two spin-orbital compounds. The DUPG/ BiOBr-0.5 composite material belongs to the two binding energies of Br3d of about 67.62 and 68.72 eV.…”

Section: Chemical States Analysismentioning

confidence: 98%

“…Based on this, Jiang and his coworker synthase a flowerlike g-C 3 N 4 /BiOBr with oxygen vacancies. [38] It gives almost complete degradation with good stability after irradiation under visible light for 120 min. In summary, a BiOBr/ g-C 3 N 4 heterojunction can effectively inhibit the recombination of photogenerated carriers and improve the activity of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

In Situ Construction of Porous g‐C₃N₄ Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity

et al. 2021

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In this study, the composite catalysts with the heterojunction between DUPG and BiOBr were used to degrade methyl orange (MO), and a g-C 3 N 4 -based ternary composite catalyst was developed. In our previous work, we prepared a D-C 3 N 4 /U-C 3 N 4 isotype heterojunction with ordered mesoporous (DUPG) by co-mixed calcination and hard template method. On this basis, we prepared DUPG/BiOBr nanoparticle uniformly distributed on DUPG nanosheets by coprecipitation self-assembly method. The hybrids form a tightly coupled heterojunction that enhances the photoactivity and photostability of the DUPG/ BiOBr composites. The results show that this tight coupling is beneficial, which facilitates the charge transfer between DUPG and BiOBr, thus promoting the effective separation of photogenerated electron hole pairs. Under visible light irradiation, the methyl orange conversion of the sample has higher photocatalytic reduction activity than BiOBr and DUPG, and its excellent photocatalytic activity is improved by light-harvesting ability, increased specific surface area, active species and target pollution.

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“…More importantly, its unique layered structure allows the formation of 2D/2D Van der Waals heterojunction with g-C 3 N 4 . In addition, the BiOBr/g-C 3 N 4 hybrid has already been investigated by theoretical and experimental research as photocatalysts (Jiang et al, 2018;Qu et al, 2020). It has been proven that the BiOBr/g-C 3 N 4 hybrids show superior photocatalytic activities in degradation of dyes and organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

DFT Study on Regulating the Electronic Structure and CO2 Reduction Reaction in BiOBr/Sulphur-Doped G-C3N4 S-Scheme Heterojunctions

Fei

Zhang

et al. 2021

Front. Nanotechnol.

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Photocatalytic CO2 reduction is a promising method to mitigate the greenhouse effect and energy shortage problem. Development of effective photocatalysts is vital in achieving high photocatalytic activity. Herein, the S-scheme heterojunctions composed by BiOBr and g-C3N4 with or without S doping are thoroughly investigated for CO2 reduction by density functional theory (DFT) calculation. Work function and charge density difference demonstrate the existence of a built-in electric field in the system, which contributes to the separation of photogenerated electron-hole pairs. Enhanced strength of a built-in electric field is revealed by analysis of Bader charge and electric field intensity. The results indicate that S doping can tailor the electronic structures and thus improve the photocatalytic activity. According to the change in absorption coefficient, system doping can also endow the heterojunction with increased visible light absorption. The in-depth investigation indicates that the superior CO2 reduction activity is ascribed to low rate-determining energy. And both of the heterojunctions are inclined to generate CH3OH rather than CH4. Furthermore, S doping can further reduce the energy from 1.23 to 0.44 eV, indicating S doping is predicted to be an efficient photocatalyst for reducing CO2 into CH3OH. Therefore, this paper provides a theoretical basis for designing appropriate catalysts through element doping and heterojunction construction.

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Synthesis of Flowerlike g‐C₃N₄/BiOBr with Enhanced Visible Light Photocatalytic Activity for Dye Degradation

Cited by 54 publications

References 41 publications

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

In Situ Construction of Porous g‐C₃N₄ Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity

DFT Study on Regulating the Electronic Structure and CO2 Reduction Reaction in BiOBr/Sulphur-Doped G-C3N4 S-Scheme Heterojunctions

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Synthesis of Flowerlike g‐C3N4/BiOBr with Enhanced Visible Light Photocatalytic Activity for Dye Degradation

Cited by 54 publications

References 41 publications

Enhanced visible light photocatalysis with E‐waste‐based V2O5/zinc–ferrite: BTEX degradation and mechanism

Enhanced visible light photocatalysis with E‐waste‐based V2O5/zinc–ferrite: BTEX degradation and mechanism

In Situ Construction of Porous g‐C3N4 Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity

DFT Study on Regulating the Electronic Structure and CO2 Reduction Reaction in BiOBr/Sulphur-Doped G-C3N4 S-Scheme Heterojunctions

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Synthesis of Flowerlike g‐C₃N₄/BiOBr with Enhanced Visible Light Photocatalytic Activity for Dye Degradation

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

In Situ Construction of Porous g‐C₃N₄ Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity