Highly efficient photocatalytic oxidation of phenol over ordered mesoporous Bi2WO6

Sun, Songmei; Wang, Wenzhong; Xu, Jiehui; Wang, Lu; Zhang, Zhijie

doi:10.1016/j.apcatb.2011.06.016

Cited by 47 publications

(17 citation statements)

References 48 publications

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“…Moreover,the valence band of pristine Bi 2 WO 6 and E3 obtained from valence band spectra in Figure 3d are 1.60 and 1.28 eV, respectively.C ombining the band gap values, the conduction band of pristineB i 2 WO 6 and E3 are À1.33 and À1.47 eV,r espectively.T he rising of the conduction band (0.14 eV) indicated that the E3 met the requirement of stronger reductive ability compare with Bi 2 WO 6 .T he band gap narrowing and stronger reductivea bility of conduction band in defective Bi 2 WO 6 will greatlyi ncrease the light-harvestinga bility andi mprove the photocatalytic activity. [32,33] The photocatalytic performance of pristine Bi 2 WO 6 and defective Bi 2 WO 6 catalysts were evaluated by using photodegradation of RhB dye. Figure 7a shows the concentration variation of RhBo ver time for different catalysts under visible-light irradiation.…”

Section: Resultsmentioning

confidence: 99%

Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi₂WO₆ and Bi₂WO_6−x Nanoplates

et al. 2015

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A comparative study of visible‐light‐responsive Bi2WO6 and oxygen‐deficient Bi2WO6−x nanoplates was conducted. The formation of oxygen vacancy resulted in the band gap narrowing of oxygen‐deficient Bi2WO6−x, through an elevation of both of the conduction and valence band positions. FTIR spectra revealed that much more surface hydroxyl groups have been detected after the etching process. The scavengers tests confirmed the generation of ⋅OH radicals during photochemical reaction for Bi2WO6−x, whereas no .OH radicals can be detected for pure Bi2WO6. The photocatalytic activities of optimized Bi2WO6−x on the decomposition of Rhodamine B (RhB) was three times as high as that of pure Bi2WO6. The improvement of photocatalytic activity on degradation of RhB and phenol can be ascribed to the synergistic effect of oxygen deficiency‐induced band shifts, together with the large quantities of surface hydroxyl groups providing active sites for the generation of OH radicals (.OH).

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Section: Resultsmentioning

confidence: 99%

Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi₂WO₆ and Bi₂WO_6−x Nanoplates

et al. 2015

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“…, which were signed as BW1, BW2, BW3, and BW4, respectively. For comparison, pure Bi 2 WO 6 was also fabricated according to the reference [35,36].…”

Section: Synthesis Of Bi 2 Wo 6 /Wo 3 Compositesmentioning

confidence: 99%

Facile Fabrication of Z-Scheme Bi2WO6/WO3 Composites for Efficient Photodegradation of Bisphenol A with Peroxymonosulfate Activation

et al. 2020

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The rational fabrication of direct Z-scheme heterostructures photocatalysts is a pivotal strategy to boost the interfacial charge migration and separation. Herein, direct Z-scheme Bi2WO6/WO3 composites were rationally fabricated for the degradation of bisphenol A combined with the activation of peroxymonosulfate (PMS). The tight interface contact between Bi2WO6 and WO3 was successfully formed by the in situ epitaxial growth of ultrathin Bi2WO6 nanosheets at the surface of WO3 nanorods. The Bi2WO6/WO3 composite presented highly efficient catalytic performance toward degradation of BPA with PMS activation as compared to the WO3 and Bi2WO6. PMS can dramatically boost the photocatalytic activity of the composites. Moreover, the results of active radical scavenging experiments revealed that h+, •O2−, and •SO4− are critical active species in the photodegradation reaction. Finally, the photocatalytic mechanism for the degradation of BPA is also discussed in detail. The great improvement of photocatalytic performance should be ascribed to the effective formation of the direct Z-scheme heterojunctions between Bi2WO6 and WO3, resulting in improved light absorption, an efficient transfer and separation of photoinduced charge carriers, and a considerable amount of the electrons and holes with strong reduction and oxidation abilities. The study might provide new inspirations to design and construct heterostructured nanomaterials with outstanding photoactivity for environmental remediation.

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“…Recent years, Bi 2 WO 6 has attracted extensive attentions due to its excellent intrinsic physical and chemical properties such as ferroelectric piezoelectricity, catalytic behavior, and nonlinear dielectric susceptibility [15,16]. More importantly, it has been found that Bi 2 WO 6 exhibits the highest photocatalytic activity among the above Bi 3+ -based oxides under visible light irradiation.…”

Section: Introductionmentioning

confidence: 99%

Controllable synthesis and photocatalytic activity of spherical, flower-like and nanofibrous bismuth tungstates

Lin

Liu

Guo

et al. 2014

Materials Science and Engineering: B

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Highly efficient photocatalytic oxidation of phenol over ordered mesoporous Bi2WO6

Cited by 47 publications

References 48 publications

Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi₂WO₆ and Bi₂WO_6−x Nanoplates

Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi₂WO₆ and Bi₂WO_6−x Nanoplates

Facile Fabrication of Z-Scheme Bi2WO6/WO3 Composites for Efficient Photodegradation of Bisphenol A with Peroxymonosulfate Activation

Controllable synthesis and photocatalytic activity of spherical, flower-like and nanofibrous bismuth tungstates

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Highly efficient photocatalytic oxidation of phenol over ordered mesoporous Bi2WO6

Cited by 47 publications

References 48 publications

Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi2WO6 and Bi2WO6−x Nanoplates

Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi2WO6 and Bi2WO6−x Nanoplates

Facile Fabrication of Z-Scheme Bi2WO6/WO3 Composites for Efficient Photodegradation of Bisphenol A with Peroxymonosulfate Activation

Controllable synthesis and photocatalytic activity of spherical, flower-like and nanofibrous bismuth tungstates

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Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi₂WO₆ and Bi₂WO_6−x Nanoplates

Generation of Oxygen Vacancy and OH Radicals: A Comparative Study of Bi₂WO₆ and Bi₂WO_6−x Nanoplates