Construction of 0D/2D CuO/BiOBr hierarchical heterojunction for the enhanced photocatalytic degradation of benzene-containing pollutants under visible light

Deng, Chonghai; Wang, Tao; Ye, Fan; Ling, Xuemei; Peng, Lulu; Hu, Hanmei; Yu, Hong; Ding, Kangze; Wu, Yiping; Dong, Qian; Le, Huirong; Han, Yongsheng

doi:10.1016/j.jece.2022.107365

Cited by 26 publications

(7 citation statements)

References 75 publications

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“…The M–S diagram (Figure ) was adopted to count the conduction band (CB) and valence band (VB) potentials in different materials to investigate the photocatalytic mechanism of BNF-2 in degrading RhB additionally. In Figure , the slopes showed all positive when the tangent lines were drawn along the longest straight part of the M–S curve, implying that all three materials displayed the characteristic of n-type semiconductors …”

Section: Results and Discussionmentioning

confidence: 97%

“…In Figure 11, the slopes showed all positive when the tangent lines were drawn along the longest straight part of the M−S curve, implying that all three materials displayed the characteristic of n-type semiconductors. 47 The flat potential E FB of BiOBr, NH 2 −Fe-MOF, and BNF-2 were determined to be 0.02, −0.75, and −0.39 eV (vs Ag/AgCl), which can be converted to 0.22, −0.55, and −0.19 eV (vs NHE), respectively. Generally speaking, the E CB was 0.3 V less than E FB , for n-type semiconductors.…”

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confidence: 99%

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Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH₂–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

Yang,

Zhang,

Jin

et al. 2023

Ind. Eng. Chem. Res.

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Using the solvothermal method, a novel three-dimensional flower-like microsphere structure composite BiOBr/NH2–Fe-MOF was prepared with type II heterojunction through the combination between BiOBr and NH2–Fe-MOF, which had 20% enhancement of specific surface area and effectively suppressed the recombination of photoinduced electron–hole pairs. After 40 min of visible light irradiation, the degradation rate constant of BiOBr/NH2–Fe-MOF-2 reached 0.08507 min–1, which was 5.29 times higher than that of BiOBr and 11.34 times higher than that of NH2–Fe-MOF. BiOBr/NH2–Fe-MOF-2 represented the highest degradation efficiency of rhodamine B, up to 98.3%. After 6 cycles of experiments, the degradation rate could still maintain 85%, which is superior to the research results of most photocatalysts reported in the literature in the last 5 years. The mechanistic study suggested that •O2 – was the main active species in RhB photocatalytic degradation. The combination of NH2–Fe-MOF with BiOBr in this study provides a new method for the rapid degradation of dye pollutants.

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Section: Results and Discussionmentioning

confidence: 97%

mentioning

confidence: 99%

Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH₂–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

Yang,

Zhang,

Jin

et al. 2023

Ind. Eng. Chem. Res.

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“…To investigate the primary constituents of CLB 0.45 composites for the degradation of RhB, capture experiments were performed by adding a capture agent (Figure 11a). The addition of IPA rarely effected the degradation of RhB, in which ⋅OH hardly participate the degradation of RhB [50] . Obviously, the presence of BQ and EDTA‐2Na made the low degradation rate of RhB, which showed that ⋅O 2 − and h + are main active substance in the degradation of pollutants by CLB 0.45 [51,52] .…”

Section: Resultsmentioning

confidence: 98%

“…The addition of IPA rarely effected the degradation of RhB, in which •OH hardly participate the degradation of RhB. [50] Obviously, the presence of BQ and EDTA-2Na made the low degradation rate of RhB, which showed •O 2 À and h + are main active substance in the degradation of pollutants by CLB 0.45 . [51,52] Therefore, during the degradation of pollutants (RhB, TC and other organic dyes),…”

Section: Active Substance Capture Testmentioning

confidence: 93%

Synthesis of Chrysanthemum‐Like BiOBr Microspheres by Structure Induction of Chitosan for Enhancing Photocatalytic Activity

Geng,

Zhang,

Zhang

et al. 2023

ChemPhotoChem

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Photocatalysis is a green technology with important application prospects in environmental fields such as wastewater treatment. Here, we synthesized chrysanthemum‐like BiOBr microspheres (CLB0.45) under introduction of structure guide and soft‐template. Natural biomass chitosan (CS) in the precursor of BiOBr successfully suppressed the growth of both (001) and (102) lattice planes through solvent effect, and promote the expose of (110) lattice planes that dominated the photocatalytic performance. Significantly, the polymer chains regulated the nanosheets of BiOBr to accurately self‐assemble. The obtained CLB0.45 had narrower band gap and more active sites due to surface defects, and the photocatalysts have higher photo‐electron hole pairs separation efficiency. And the degradation performance towards RhB (99.7%, 30 min) of the CLB0.45 was increased, which was 4.6 times higher than that of pure BiOBr. The degradation rate of tetracycline (TC) also exhibited excellent (85.3%). The photodegradation mechanism of CLB0.45 was proposed and verified. In summary, the prepared CLB0.45 through structure guiding and soft‐template have a promising future in the photocatalytic purification of organic pollutants.

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“…However, the high carrier recombination rate limits its practical application, so modification and recombination with other catalysts are regarded as effective strategies [ 13 ]. Deng et al [ 14 ] grew CuO quantum dots on the {001}-facet exposed BiOBr nanoflakes to construct a p-n heterojunction. The prepared heterojunction could easily remove Congo red and bisphenol A (BPA) in the water.…”

Section: Introductionmentioning

confidence: 99%

A Bifunctional BiOBr/ZIF-8/ZnO Photocatalyst with Rich Oxygen Vacancy for Enhanced Wastewater Treatment and H2O2 Generation

et al. 2023

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Photocatalytic technology is considered an ideal approach for clean energy conversion and environmental pollution applications. In this work, a bifunctional BiOBr/ZIF-8/ZnO photocatalyst was proposed for removing phenols in wastewater and generating hydrogen peroxide. Insights from scanning electron microscopy measurements revealed the well-dispersion of ZIF-8/ZnO was on the BiOBr layer, which could effectively prevent agglomeration of ZIF-8 and facilitate the separation of carriers. In addition, the optimal H2O2 yield of the BiOBr/ZIF-8/ZnO sample could reach 116 mmol·L−1·g−1 within 2 h, much higher than that of pure BiOBr (with the value of 82 mmol·L−1·g−1). The optimal BiOBr/ZIF-8/ZnO sample could also remove 90% of the phenol or bisphenol A in 2 h, and its kinetic constants were 3.8 times and 2.3 times that of pure BiOBr, respectively. Based on the analysis of the various experimental characterizations, the photocatalytic mechanism of the S-scheme BiOBr/ZIF-8/ZnO composite for the degradation of phenolic pollutants and generation of H2O2 was proposed. The formation of the heterojunction and the oxygen vacancy work together to significantly improve its photocatalytic efficiency. In addition, the BiOBr/ZIF-8/ZnO catalyst has a certain impact on the degradation of phenol in actual wastewater, providing a way to effectively remove refractory pollutants and generate H2O2 in actual water.

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Construction of 0D/2D CuO/BiOBr hierarchical heterojunction for the enhanced photocatalytic degradation of benzene-containing pollutants under visible light

Cited by 26 publications

References 75 publications

Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH₂–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH₂–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

Synthesis of Chrysanthemum‐Like BiOBr Microspheres by Structure Induction of Chitosan for Enhancing Photocatalytic Activity

A Bifunctional BiOBr/ZIF-8/ZnO Photocatalyst with Rich Oxygen Vacancy for Enhanced Wastewater Treatment and H2O2 Generation

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Construction of 0D/2D CuO/BiOBr hierarchical heterojunction for the enhanced photocatalytic degradation of benzene-containing pollutants under visible light

Cited by 26 publications

References 75 publications

Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH2–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH2–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

Synthesis of Chrysanthemum‐Like BiOBr Microspheres by Structure Induction of Chitosan for Enhancing Photocatalytic Activity

A Bifunctional BiOBr/ZIF-8/ZnO Photocatalyst with Rich Oxygen Vacancy for Enhanced Wastewater Treatment and H2O2 Generation

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Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH₂–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light

Type II Heterojunction Formed by 3D Flower-like Microspheres of BiOBr/NH₂–Fe-MOF with High Photocatalytic Degradation of RhB via Visible Light