Fabricaion of improved novel p–n junction BiOI/Bi 2 Sn 2 O 7  nanocomposite for visible light driven photocatalysis

Xu, Weicheng; Fang, Jianzhang; Zhu, Xinhua; Fang, Zhen; Cen, Chaoping

doi:10.1016/j.materresbull.2015.07.033

Cited by 30 publications

(13 citation statements)

References 42 publications

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“…The results indicate that the dominant active species is h + but not •O 2 À or •OH radicals in the photocatalytic reaction. BiOBr (E g = 2.91 eV) 34 and Bi 2 Sn 2 O 7 (E g = 2.76 eV) 35 can both absorb visible light. With the irradiation of visible light, the electrons in the VB of BiOBr and Bi 2 Sn 2 O 7 were excited to CB.…”

Section: Resultsmentioning

confidence: 99%

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Facile Synthesis of BiOBr/Bi₂Sn₂O₇ Heterojunction Photocatalysts with Improved Photocatalytic Activities

Zhang

et al. 2016

J. Am. Ceram. Soc.

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BiOBr/Bi2Sn2O7 heterojunction photocatalysts were successfully synthesized by treating hydrothermal as‐prepared Bi2Sn2O7 nanoparticles with hydrobromic acid (HBr). Partial Bi2Sn2O7 nanoparticles reacted with HBr to form the sheet‐like BiOBr, and Bi2Sn2O7 nanoparticles distributed evenly on BiOBr sheets. BiOBr/Bi2Sn2O7 photocatalysts treated with different concentrations of HBr solution were successfully obtained, and their structures, morphologies, optical, and visible light photocatalytic properties were characterized by XRD, DRS, PL, SEM, and TEM. The experimental results showed that the BiOBr/Bi2Sn2O7 photocatalysts showed improved photocatalytic activity under visible light irradiation than pure Bi2Sn2O7. The sample treated with 0.08 mol/L HBr solution shows the best visible light photodegradation performance of rhodamine B. In addition, the active species and photocatalytic mechanism were discussed in detail.

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Section: Resultsmentioning

confidence: 99%

“…Figure shows the plausible schematic diagram of the BiOBr/Bi 2 Sn 2 O 7 composites under visible light irradiation. BiOBr ( E g = 2.91 eV) and Bi 2 Sn 2 O 7 ( E g = 2.76 eV) can both absorb visible light. With the irradiation of visible light, the electrons in the VB of BiOBr and Bi 2 Sn 2 O 7 were excited to CB.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of BiOBr/Bi₂Sn₂O₇ Heterojunction Photocatalysts with Improved Photocatalytic Activities

Zhang

et al. 2016

J. Am. Ceram. Soc.

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“…When the ratio of the amount of substance(Bi:I) is 1 that induces to form the product with the best property. In some way, it is better than the previous work . Affirmatively, it also needs to do more exploration to improve the properties, as specific surface area, optical response ability and the degradation ability, etc.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of BiOI Hierarchical Microspheres with Efficient Photocatalysis for Methylene Blue and Phenol Removal

Wang

Song

Hou

et al. 2017

Crystal Research and Technology

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BiOI hierarchical microspheres were synthesized by a solvothermal method. The different ratio of the amount of substance (Bi:I) drastically affects the feature that is embodied in multiaspect, such as crystallinity, morphological characteristics, component content, specific surface area and band gap width. These dissimilarities exert a great influence on photocatalytic performance. Ethylene glycol acts as soft template to guide the generation of the hierarchical microspheres. The presence of methanol has a positive effect on uniformity of reaction system in physical and chemical properties, because of its easy dispersibility and intersolubility. With interaction of mixed solvent, it leads to generate the uniform microspheres. The as‐received samples are characterized by X‐ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), energy dispersive spectroscopy(EDS), N2 adsorption‐desorption, UV–vis diffuse reflectance spectroscopy (DRS), X‐ray photoelectron spectroscopy (XPS), and fluorescence spectrophotometer. The formation of BiOI hierarchical microspheres were discussed with variational ratio of the amount of substance in mixed alcohol. To evaluate photocatalysis of as‐prepared BiOI, the methylene blue and phenol were exposed to visible light, which indicated degradation efficiency up to 98.09% just in 50 min and 94.14% within 6 h. The result shows that BiOI hierarchical microsphere is a promising photocatalyst in practical application.

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“…The junctions of heterophase structures are frequently intriguing sites for physical and chemical processes including photocatalysis7891011. The heterophase structures benefit the separation and transfer of the electron-hole pairs and the effective utilization of visible light.…”

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confidence: 99%

“…The heterophase structures benefit the separation and transfer of the electron-hole pairs and the effective utilization of visible light. This is the main reason for their excellent catalytic performances91011. Therefore, heterophase structures effectively improve heterogeneous reactions1213.…”

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confidence: 99%

Heterophase-structured nanocrystals as superior supports for Ru-based catalysts in selective hydrogenation of benzene

Peng

et al. 2017

Sci Rep

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ZrO2 heterophase structure nanocrystals (HSNCs) were synthesized with tunable ratios of monoclinic ZrO2 (m-ZrO2) to tetragonal ZrO2 (t-ZrO2). The phase mole ratio of m-ZrO2 versus t-ZrO2 in ZrO2 HSNCs was tuned from 40% to 100%. The concentration of the surface hydroxyl groups on m-ZrO2 is higher than that on t-ZrO2. ZrO2 HSNCs have different surface hydroxyl groups on two crystalline phases. This creates more intimate synergistic effects than their single-phase counterparts. The ZrO2 HSNCs were used as effective supports to fabricate heterophase-structured Ru/ZrO2 catalysts for benzene-selective hydrogenation. The excellent catalytic performance including high activity and selectivity is attributed to the heterogeneous strong/weak hydrophilic interface and water layer formed at the m-ZrO2/t-ZrO2 catalyst junction.

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Fabricaion of improved novel p–n junction BiOI/Bi 2 Sn 2 O 7 nanocomposite for visible light driven photocatalysis

Cited by 30 publications

References 42 publications

Facile Synthesis of BiOBr/Bi₂Sn₂O₇ Heterojunction Photocatalysts with Improved Photocatalytic Activities

Facile Synthesis of BiOBr/Bi₂Sn₂O₇ Heterojunction Photocatalysts with Improved Photocatalytic Activities

Fabrication of BiOI Hierarchical Microspheres with Efficient Photocatalysis for Methylene Blue and Phenol Removal

Heterophase-structured nanocrystals as superior supports for Ru-based catalysts in selective hydrogenation of benzene

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Fabricaion of improved novel p–n junction BiOI/Bi 2 Sn 2 O 7 nanocomposite for visible light driven photocatalysis

Cited by 30 publications

References 42 publications

Facile Synthesis of BiOBr/Bi2Sn2O7 Heterojunction Photocatalysts with Improved Photocatalytic Activities

Facile Synthesis of BiOBr/Bi2Sn2O7 Heterojunction Photocatalysts with Improved Photocatalytic Activities

Fabrication of BiOI Hierarchical Microspheres with Efficient Photocatalysis for Methylene Blue and Phenol Removal

Heterophase-structured nanocrystals as superior supports for Ru-based catalysts in selective hydrogenation of benzene

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Facile Synthesis of BiOBr/Bi₂Sn₂O₇ Heterojunction Photocatalysts with Improved Photocatalytic Activities

Facile Synthesis of BiOBr/Bi₂Sn₂O₇ Heterojunction Photocatalysts with Improved Photocatalytic Activities