A novel p–n heterojunction BiOBr/ZnWO4: Preparation and its improved visible light photocatalytic activity

Song, Xu Chun; Li, Wen Ting; Huang, Wan; Zhou, Huan; Zheng, Yi; Yin, Hao

doi:10.1016/j.matchemphys.2015.04.033

Cited by 45 publications

(13 citation statements)

References 29 publications

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“…3 Therefore, suitable modification of the BiOBr surface is frequently necessary to facilitate the photocatalytic reactions. In this regard, impurity incorporation, such as C 3 N 4 , 15 graphene, 16 Ag/AgBr, 17 Fe, 18 C, 19 TiO 2 , 20 ZnWO 4 , 21 BiPO 4 22 and halogen element crystal substitution [23][24] have widely been demonstrated to improve the photocatalytic activity of BiOBr.…”

Section: Introductionmentioning

confidence: 99%

Alkali-Induced in Situ Fabrication of Bi₂O₄-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

Yue

et al. 2016

J. Phys. Chem. C

110

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A simple alkali (NaOH) post-treatment approach assisted with light irradiation to in situ obtain Bi 2 O 4 nanoparticles decorated BiOBr nanosheets, brown colored BiOBr-0.01, is presented for the first time. Bi 2 O 4 nanoparticles are formed due to a combined action of NaOH induced dehalogenation and light triggered photogenerated hole (h + ) oxidation processes on the surface of BiOBr nanosheets. Importantly, by varying the NaOH concertation in the post-treatment, the content of Bi 2 O 4 phase in the hybrid structures can be easily tuned and predominantly exposed

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Section: Introductionmentioning

confidence: 99%

Alkali-Induced in Situ Fabrication of Bi₂O₄-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

Yue

et al. 2016

J. Phys. Chem. C

110

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“…On the basis of the alignment of the valence bands and conduction bands of BiOBr and Bi 2 Sn 2 O 7 , BiOBr/Bi 2 Sn 2 O 7 is expected to exhibit enhanced photocatalytic performance . In this work, we synthesized a series of BiOBr/Bi 2 Sn 2 O 7 composites by facially treating Bi 2 Sn 2 O 7 with hydrobromic acid (HBr) solution.…”

Section: Introductionmentioning

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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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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“…Additionally, ion doping, such as seen in fluorine and chlorine [ 7 , 8 , 9 , 10 ], could greatly enhance photocatalytic performance since the doped atoms can act as electron traps and promote photogenerated charge separation. In addition, construction of heterojunction photocatalyst by combining ZnWO 4 with other semiconductors, such as Bi 2 WO 6 /ZnWO 4 [ 11 ], ZnWO 4 /BiOI [ 12 ], and BiOBr/ZnWO 4 [ 13 ], provides a feasible route to facilitate the effective transmission of the charge through interfacial interfaces. Additionally, by combining ZnWO 4 with material that has a π–π conjugated structure like C 3 N 4 [ 14 , 15 ] and graphene [ 16 ] could effectively inhibit the combination of photo-generated carriers due to the special conductivity of the conjugate material.…”

Section: Introductionmentioning

confidence: 99%

Surface Decoration of ZnWO4 Nanorods with Cu2O Nanoparticles to Build Heterostructure with Enhanced Photocatalysis

et al. 2018

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The surface of ZnWO4 nanorods was decorated with Cu2O nanoparticles (Cu2O/ZnWO4) prepared through a precipitation method. The Cu2O nanoparticles were tightly deposited on the ZnWO4 surface and had average diameters of 20 nm. The nanoparticles not only promoted the absorption and utilization of visible light but also facilitated the separation of photogenerated charge carriers. This brought an improvement of the photocatalytic activity. The 5 wt % Cu2O/ZnWO4 photocatalyst displayed the highest degrade efficiency for methylene blue (MB) degradation under visible light, which was 7.8 and 2 times higher than pure ZnWO4 and Cu2O, respectively. Meanwhile, the Cu2O/ZnWO4 composite photocatalyst was able to go through phenol degradation under visible light. The results of photoluminescence (PL), photocurrent, and electrochemical impedance spectra (EIS) measurements were consistent and prove the rapid separation of charge, which originated from the match level structure and the close contact with the interface. The radical and hole trapping experiments were carried out to detect the main active substances in the photodegradation process. The holes and ·O2− radicals were predicted to dominate the photocatalytic process. Based on the characterization analysis and experiment results, a possible photocatalytic mechanism for enhancing photocatalytic activity was proposed.

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A novel p–n heterojunction BiOBr/ZnWO4: Preparation and its improved visible light photocatalytic activity

Cited by 45 publications

References 29 publications

Alkali-Induced in Situ Fabrication of Bi₂O₄-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

Alkali-Induced in Situ Fabrication of Bi₂O₄-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

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

Surface Decoration of ZnWO4 Nanorods with Cu2O Nanoparticles to Build Heterostructure with Enhanced Photocatalysis

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A novel p–n heterojunction BiOBr/ZnWO4: Preparation and its improved visible light photocatalytic activity

Cited by 45 publications

References 29 publications

Alkali-Induced in Situ Fabrication of Bi2O4-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

Alkali-Induced in Situ Fabrication of Bi2O4-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

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

Surface Decoration of ZnWO4 Nanorods with Cu2O Nanoparticles to Build Heterostructure with Enhanced Photocatalysis

Contact Info

Product

Resources

About

Alkali-Induced in Situ Fabrication of Bi₂O₄-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

Alkali-Induced in Situ Fabrication of Bi₂O₄-Decorated BiOBr Nanosheets with Excellent Photocatalytic Performance

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