Enhanced photocatalytic degradation of bisphenol A by Co-doped BiOCl nanosheets under visible light irradiation

Wang, Chu-Ya; Zhang, Yingjie; Wang, Weikang; Pei, Dan-Ni; Huang, Gui‐Xiang; Chen, Jie‐Jie; Zhang, Xing; Yu, Han‐Qing

doi:10.1016/j.apcatb.2017.09.036

Cited by 321 publications

(73 citation statements)

References 40 publications

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“…[35] The carrierd ensity can be enhanced by introducing oxygen vacancies into the Bi 24 O 31 Cl 10 surface, which is reflected by the smaller slope of the MS plots of Bi 24 O 31 Cl 10 -OV than that of Bi 24 O 31 Cl 10 (Figure 3a). [38] In the quasi Fermi level, the carrier density difference can be calculated from the Nernst equation and the density of charge carriers can be reflected from the photocurrent onset potentialint he I-V curve in the presence of fast electron acceptor. [39] The I-V curvesofBi 24 (Figure 3c and Figure S8).…”

Section: Resultsmentioning

confidence: 99%

Oxygen Vacancy Engineering of Bi₂₄O₃₁Cl₁₀ for Boosted Photocatalytic CO₂ Conversion

et al. 2019

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Unearthing an ideal model to describe the role of defect sites for boosting photocatalytic CO2 reduction is rational and necessary, but it still remains a significant challenge. Herein, oxygen vacancies are introduced on the surface of Bi24O31Cl10 photocatalyst (Bi24O31Cl10‐OV) for fine‐tuning the photocatalytic efficiency. The formation of oxygen vacancies leads to a new donor level near the conduction band minimum, which enables a faster charge transfer and higher carrier density. Moreover, oxygen vacancies can considerably reduce the energy for the formation of COOH* intermediates during CO2 conversion. As a result, the activity of Bi24O31Cl10‐OV for selective photoreduction of CO2 to CO is significantly improved, with a CO generation rate of 0.9 μmol h−1 g−1, which is nearly 4 times higher than that of pristine Bi24O31Cl10. This study reinforces our understanding of defect engineering in Bi‐based photocatalysts and underscores the potential importance of implanting oxygen vacancies as an effective strategy for solar energy conversion.

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Section: Resultsmentioning

confidence: 99%

Oxygen Vacancy Engineering of Bi₂₄O₃₁Cl₁₀ for Boosted Photocatalytic CO₂ Conversion

et al. 2019

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“…Upon exposure of the reaction to LED light, the photo-generated electrons and holes were excited from the VB to the CB band, resulting in the generation of holes in the VB band. [49][50][51] The E VB and E CB were calculated using eqn (26) and (27) to be 1.86 V and À0.15 V, respectively.…”

Section: Radical Identication and Catalysis Mechanismmentioning

confidence: 99%

A facile heterogeneous system for persulfate activation by CuFe₂O₄ under LED light irradiation

Zhong

et al. 2019

RSC Adv.

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“…BiOCl is a new type of nontoxic and relatively stable bismuth‐based semiconductor photocatalytic material . Its open layered structure and indirect transition bandgaps are beneficial to the separation and transfer of electrons and holes, making it exhibit excellent photocatalytic performance in energy, chemical industry, environmental protection, materials, and other fields. However, BiOCl is a wide bandgap semiconductor with a bandgap of 3.19 to 3.44eV and a low utilization rate of visible light .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of “walnut‐like” BiOCl/Br solid solution photocatalyst by electrostatic self‐assembly method

et al. 2019

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Summary In this paper, under the control strategy of surface charge of BiOCl photocatalyst and the electrostatic adsorption of anions and cations in potassium bromide (KBr) and polyvinylpyrrolidone (PVP), the self‐assembly of “walnut‐like” BiOCl/Br solid solution nanophotocatalyst at a lower temperature water bath was proposed for the first time. X‐ray diffraction (XRD), Raman, scanning electron microscopy (SEM), high‐resolution transmission electron microscopy (HRTEM), energy‐dispersive system (EDS), X‐ray photoelectron spectroscopy (XPS), Brunauer‐Emmett‐Teller (BET), UV‐Vis, photoluminescence spectroscopy (PL) and Mott‐Schottky curve, transient photocurrent densities, and electrochemical impedance spectroscopy (EIS) were used to analyze the properties of materials, including its morphology, element distribution and chemical states, specific surface area, electrochemical property, and photogenic charge transfer. Based on the degradation performance of RhB dye wastewater and phenol in visible and ultraviolet light, and the band structure of BiOCl/Br solid solution, the reason for the improved photocatalytic activity was deeply discussed, and the possible degradation mechanism was also put forward. The above results show that Br− can be inserted into the crystal lattice of BiOCl under the effect of electrostatic adsorption to form solid solution by the interaction between atomic orbitals, which not only reduces the bandgap width but also improves the separation and mobility of photogenic electrons and holes, causing the absorbed light to shift red to the visible region. In addition, when the nBr−/nCl− = 0.67, “walnut‐like” BiOCl/Br solid solution was formed, and this kind of special core‐shell structure not only can increase the specific surface area, increase the number of active sites, but also can make the light reflect and refract many times in the cavity and further increase the utilization rate of light energy, and then the best photocatalytic activity was achieved. This study provides an new method to enhance the photocatalytic performance of BiOCl and be conducive to the development of modern material science.

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Enhanced photocatalytic degradation of bisphenol A by Co-doped BiOCl nanosheets under visible light irradiation

Cited by 321 publications

References 40 publications

Oxygen Vacancy Engineering of Bi₂₄O₃₁Cl₁₀ for Boosted Photocatalytic CO₂ Conversion

Oxygen Vacancy Engineering of Bi₂₄O₃₁Cl₁₀ for Boosted Photocatalytic CO₂ Conversion

A facile heterogeneous system for persulfate activation by CuFe₂O₄ under LED light irradiation

Synthesis of “walnut‐like” BiOCl/Br solid solution photocatalyst by electrostatic self‐assembly method

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Enhanced photocatalytic degradation of bisphenol A by Co-doped BiOCl nanosheets under visible light irradiation

Cited by 321 publications

References 40 publications

Oxygen Vacancy Engineering of Bi24O31Cl10 for Boosted Photocatalytic CO2 Conversion

Oxygen Vacancy Engineering of Bi24O31Cl10 for Boosted Photocatalytic CO2 Conversion

A facile heterogeneous system for persulfate activation by CuFe2O4 under LED light irradiation

Synthesis of “walnut‐like” BiOCl/Br solid solution photocatalyst by electrostatic self‐assembly method

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Oxygen Vacancy Engineering of Bi₂₄O₃₁Cl₁₀ for Boosted Photocatalytic CO₂ Conversion

Oxygen Vacancy Engineering of Bi₂₄O₃₁Cl₁₀ for Boosted Photocatalytic CO₂ Conversion

A facile heterogeneous system for persulfate activation by CuFe₂O₄ under LED light irradiation