Solar promoted azo dye degradation and energy production in the bio-photoelectrochemical system with a g-C3N4/BiOBr heterojunction photocathode

Hou, Yanping; Gan, Yuanyuan; Yu, Zebin; Chen, Xixi; Qian, Lun; Zhang, Boge; Huang, Lirong; Huang, Jun

doi:10.1016/j.jpowsour.2017.10.033

Cited by 80 publications

(18 citation statements)

References 41 publications

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“…They all mean that the coupling of BiOBr and g-C 3 N 4 may occur on (001) and (002) facets of BiOBr and the (002) peak of DUPG facet. [35] This also indicates that BiOBr has been successfully deposited onto the surface of DUPG and the DUPG/BiOBr heterojunction was successfully synthesized. In addition, the (001) peak of the DUPG/BiOBr complex is much wider than the pure BiOBr and gradually narrows as the BiOBr increases, indicating that the thickness of the BiOBr in the heterojunction is gradually reduced.…”

Section: Xrd Analysismentioning

confidence: 86%

“…In other words, they have matching band structures. [35] Clearly, g-C 3 N 4 / BiOBr has closely contacted interfaces and well-aligned straddling band-structures. [36] Simultaneously, compared to BiOBr, g-C 3 N 4 has so more negative conductance potential energy that the dislocation band structure of BiOBr and provides a channel for the transfer of electron-hole pairs.…”

Section: Introductionmentioning

confidence: 98%

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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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Section: Xrd Analysismentioning

confidence: 86%

Section: Introductionmentioning

confidence: 98%

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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“…For this purpose, rutile-coated graphite [9] and TiO 2 -coated nickel foam [10] have been proposed as photo-active cathodes in MFCs and other bioelectrochemical systems, for efficient electron transfer to the azo dyes molecules. However, since TiO 2 based photocatalysts mainly respond to the ultraviolet component of the solar radiation spectrum, Pd-modified silicon nanowire or graphite carbon nitride/BiOBr heterojunction have been further developed to widen the cathode response to the visible (up to 43% of the solar radiation) [11,12]. The conduction band potentials of these visible active photocatalysts (less than -0.54 V vs. standard hydrogen electrode, SHE) are lower than the theoretical electrode potential for hydrogen evolution (-0.414 V vs. SHE).…”

Section: Introductionmentioning

confidence: 99%

“…The conduction band potentials of these visible active photocatalysts (less than -0.54 V vs. standard hydrogen electrode, SHE) are lower than the theoretical electrode potential for hydrogen evolution (-0.414 V vs. SHE). Therefore, in these systems the generation of hydrogen further consumes electrons as a side reaction, decreasing the overall rate of azo dyes decolorization [11,12].…”

Section: Introductionmentioning

confidence: 99%

Sequential anaerobic and electro-Fenton processes mediated by W and Mo oxides for degradation/mineralization of azo dye methyl orange in photo assisted microbial fuel cells

Wang

Huang

Quan

et al. 2019

Applied Catalysis B: Environmental

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The intensification of the degradation and mineralization of the azo dye methyl orange (MO) in contaminated water with simultaneous production of renewable electrical energy was achieved in photo-assisted microbial fuel cells (MFCs) operated sequentially under anaerobic-aerobic processes, in the presence of Fe(III) and W and Mo oxides catalytic species. In this novel process, the W and Mo oxides deposited on the graphite felt cathodes accelerated electron transfer and the reductive decolorization of MO. Simultaneously, the mineralization of MO and intermediate products was intensified by the production of hydroxyl radicals (HO•) produced by (i) the photoreduction of Fe(III) to Fe(II), and by (ii) the reaction of the photochemically and electrochemically produced Fe(II) with hydrogen peroxide, which was produced in-situ during the aerobic stage. Under anaerobic conditions, the reductive decolorization of MO was driven by cathodic electrons, while the partial oxidation of the intermediates proceeded through holes oxidation, producing N,N-dimethyl-p-phenylenediamine. In contrast, under aerobic conditions superoxide radicals (O 2 •-) were predominant to HO•, forming 4-hydroxy-N,N-dimethylaniline. In the presence of Fe(III) and under aerobic conditions, the oxidation of the intermediate products driven by HO• superseded that of O 2 •-, yielding phenol and amines, via the oxidation of 4-hydroxy-N,N-dimethylaniline and N,N-dimethyl-p-phenylenediamine. These sequential anaerobic and electro-Fenton processes led to the production of benzene and significantly faster oxidation reactions, compared to either the anaerobic or the aerobic operation in the presence of Fe(III). Complete degradation and mineralization (96.8 ± 3.5%) of MO (20 mg/L) with simultaneous electricity production (0.0002 kWh/kg MO) was therefore achieved with sequential anaerobic (20 min)-aerobic (100 min) operation in the presence of Fe(III) (10 mg/L). This study demonstrates an alternative and environmentally benign approach for efficient remediation of azo dye contaminated water with simultaneous production of renewable energy.

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“…However, the single material has the disadvantage of high recombination rate of photogenerated electron pair, which requires further study to improve its photocatalytic activity. So far, some BiOBr based heterojunction composite photocatalysts have been reported, such as BiOBr/BiOI, BiOBr/TiO 2 , BiOBr/ZnO, BiOBr/g‐C 3 N 4 and so on. Compared with monomer materials, the catalytic activity of the above composite heterojunction photocatalyst has been improved efficiently.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reducing Agent NaBH₄ on Photocatalytic Properties of Bi/BiOBr/Bi₂WO₆ Composites

Gao

Yao

et al. 2019

ChemistrySelect

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With the improvement of human living standards, a large amount of drugs in the fields of medicine, agriculture, animal husbandry and other fields have being invested and used, resulting in an increasing demand for cleaning antibiotics to clean water sources. In this study, Bi/BiOBr/Bi 2 WO 6 composite photocatalyst was successfully synthesized by ahydrothermal method with BiOBr as the precursor. The effect of reducing agent sodium borohydride (NaBH 4 ) on the structure and photocatalytic activity of the composite was studied. The results showed that most active photocatalyst was obtained when 20 mmol/L of sodium borohydride was used. The degradation of norfloxacin on Bi/BiOBr/Bi 2 WO 6 reached 96.1%, which was about 6.7% higher than that on BiOBr/Bi 2 WO 6 . And the reaction rate was 1.4 times of BiOBr/Bi 2 WO 6 . The heterojunction formed by the three substances was the main reason for the enhanced catalytic activity. These results were beneficial for the practical application of high performance Bi/BiOBr/ Bi 2 WO 6 photocatalytic materials.

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Solar promoted azo dye degradation and energy production in the bio-photoelectrochemical system with a g-C3N4/BiOBr heterojunction photocathode

Cited by 80 publications

References 41 publications

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

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

Sequential anaerobic and electro-Fenton processes mediated by W and Mo oxides for degradation/mineralization of azo dye methyl orange in photo assisted microbial fuel cells

Effect of Reducing Agent NaBH₄ on Photocatalytic Properties of Bi/BiOBr/Bi₂WO₆ Composites

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Solar promoted azo dye degradation and energy production in the bio-photoelectrochemical system with a g-C3N4/BiOBr heterojunction photocathode

Cited by 80 publications

References 41 publications

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

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

Sequential anaerobic and electro-Fenton processes mediated by W and Mo oxides for degradation/mineralization of azo dye methyl orange in photo assisted microbial fuel cells

Effect of Reducing Agent NaBH4 on Photocatalytic Properties of Bi/BiOBr/Bi2WO6 Composites

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

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

Effect of Reducing Agent NaBH₄ on Photocatalytic Properties of Bi/BiOBr/Bi₂WO₆ Composites