Electrospun Cr-doped Bi4Ti3O12/Bi2Ti2O7 heterostructure fibers with enhanced visible-light photocatalytic properties

Shi, Hongfei; Tan, Huaqiao; Zhu, Wanbin; Sun, Zaicheng; Ma, Yuejia; Wang, Enbo

doi:10.1039/c4ta06736c

Cited by 68 publications

(12 citation statements)

References 41 publications

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“…The Gaussian-resolved result for Cr 2p spectrum in Fig. 4b displays the peak at around 576.23 eV, which could be attributed to trivalent chromium (Cr 3+ ), a low oxidation state, according to the literature [41]. The two main peaks at 457.59 and 465.42 eV in Fig.…”

Section: Characterizationmentioning

confidence: 88%

Chromium-modified Bi 4 Ti 3 O 12 photocatalyst: Application for hydrogen evolution and pollutant degradation

Chen

Jiang

Zhu

et al. 2016

Applied Catalysis B: Environmental

106

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Section: Characterizationmentioning

confidence: 88%

Chromium-modified Bi 4 Ti 3 O 12 photocatalyst: Application for hydrogen evolution and pollutant degradation

Chen

Jiang

Zhu

et al. 2016

Applied Catalysis B: Environmental

106

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“…Bi 2 Ti 2 O 7 has often been coupled or doped with other materials in order to enhance its photocatalytic properties. 7,[21][22][23] In the present study, we report on visible light photoactivity of a nanostructured Bi 2 Ti 2 O 7 -based system in presence of an electron scavenger, H 2 O 2 . The combination of Bi 2 Ti 2 O 7 and H 2 O 2 has already been found to be efficient by Hou et al 4 They reported enhanced photodecolorization of Rhodamine B with using H 2 O 2 with Bi 2 Ti 2 O 7 microspheres under visible light irradiation.…”

Section: Introductionmentioning

confidence: 91%

“…Bi 2 Ti 2 O 7 has often been coupled or doped with other materials in order to enhance its photocatalytic properties . In the present study, we report on visible light photoactivity of a nanostructured Bi 2 Ti 2 O 7 ‐based system in presence of an electron scavenger, H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

Bi₂Ti₂O₇‐based pyrochlore nanoparticles and their superior photocatalytic activity under visible light

Benčina

Valant

2017

J Am Ceram Soc

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Nanoparticles of Bi 2 Ti 2 O 7 pyrochlore were synthesized by a coprecipitation method. They exhibit a high visible-light photoactivity for decolorization of a methyl-orange dye solution in the presence of a sacrificial agent, H 2 O 2 . The same pyrochlore system with an Ag co-catalyst showed even faster kinetics under only visible light and an unprecedentedly high photoactivity in the UV range. K E Y W O R D Snanoparticles, photocatalysis, pyrochlore Nova Gorica, Slovenia. Email: metka.bencina@ijs.si Present addressMetka Ben cina, Jo zef Stefan Institute, Ljubljana, Slovenia. The pyrochlores are interesting photocatalytic materials because it is possible to tune their electron/hole mobility and electronic structure by choice of the A and B elements. 20 The charge mobility influences the photocatalytic activity by affecting a probability for reaching reactive sites at a surface of the photocatalyst. Bi 3+ as an A-site ion contributes to the high electron mobility and photoactivity by a simultaneous effect of Bi 6s and 6p orbitals that are responsible for upwards and downwards shift of the valence and conductive band, respectively. Funding information 20The reported studies on the on inactivity of the pyrochlore, prepared from a nominally stoichiometric composition (Ti/Bi = 1:1) and addition of 3 wt% Pt. Such product contained some secondary Bi 4 Ti 3 O 12 phase. But, they proved that the Bi 2 Ti 2 O 7 pyrochlore with a nominally non-stoichiometric composition (Ti/ Bi = 1.25-1.5) is able to generate H 2 . They also showed that there is a correlation between the photoactivity and structural geometry of pyrochlores; the photoactivity is enhanced by reducing an initial 180°Ti-O-Ti angle in the TiO 6 network by an increase in the Ti/Bi ratio. The problem with the reported studies is in a fact that they all have used micrometer size powder with a low specific surface area. As far as we know, the only report about photoactivity of Bi 2 Ti 2 O 7 nanometer size powder with a large specific surface area was published by Su and Zhang. were mixed in deionized water for 2 hours. The dried mixture was washed with deionized water and centrifuged several times to remove NO 3 À . The obtained solid Ag(10%)/ Bi 2 Ti 2 O 7 and Ag(10%)/TiO 2 (P25) powders were dried at 70°C for 2 hours and then annealed at 350°C for 1 hour. TiO 2 (P25) which was used as a reference in photocatalytic experiments was purchased from Sigma Aldrich. | CharacterizationPhase identification was performed with a PAN-alytical X'pert pro MPD diffractometer (Almelo, Netherlands) in a Bragg-Brentano geometry with Cu K-alpha radiation over a 2h range from 5°to 90°with a step size of 0.017°, a divergence slit of 0.218°, counting time of 25 seconds per step in the continuous scanning mode. HighScore plus software with ICSD database was used for a qualitative analysis of the obtained X-ray diffraction (XRD) patterns. The unit cell parameters were calculated with the Rietveld refinement, based on references from the ICSD database. The estimated error in the ...

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“…The two strong peaks are observed at approximately 465.8 eV and 458.3 eV, which are ascribed to the Ti 2p 3/2 and Ti 2p 1/2 binding energies, respectively [12,13]. The dominant peak of O1s locates at 530 eV [14]. The peaks of 164.7 eV and 159.4 eV were attributed by Bi 4f 5/2 and Bi 4f 7/2 , which correspond to Bi 3+ [15,16].…”

Section: Chemical Compositionmentioning

confidence: 96%

Hydrothermal synthesis of novel flower-like BiVO 4 /Bi 2 Ti 2 O 7 with superior photocatalytic activity toward tetracycline removal

Han

Guo

et al. 2016

Applied Catalysis A: General

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Electrospun Cr-doped Bi₄Ti₃O₁₂/Bi₂Ti₂O₇ heterostructure fibers with enhanced visible-light photocatalytic properties

Abstract: Cr-doped Bi4Ti3O12/Bi2Ti2O7 nanofibers have been synthesized by electrospinning/calcination route, which shows good visible-light activity for photodegradation of methyl orange.

Cited by 68 publications

References 41 publications

Chromium-modified Bi 4 Ti 3 O 12 photocatalyst: Application for hydrogen evolution and pollutant degradation

Chromium-modified Bi 4 Ti 3 O 12 photocatalyst: Application for hydrogen evolution and pollutant degradation

Bi₂Ti₂O₇‐based pyrochlore nanoparticles and their superior photocatalytic activity under visible light

Hydrothermal synthesis of novel flower-like BiVO 4 /Bi 2 Ti 2 O 7 with superior photocatalytic activity toward tetracycline removal

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Electrospun Cr-doped Bi4Ti3O12/Bi2Ti2O7 heterostructure fibers with enhanced visible-light photocatalytic properties

Abstract: Cr-doped Bi4Ti3O12/Bi2Ti2O7 nanofibers have been synthesized by electrospinning/calcination route, which shows good visible-light activity for photodegradation of methyl orange.

Cited by 68 publications

References 41 publications

Chromium-modified Bi 4 Ti 3 O 12 photocatalyst: Application for hydrogen evolution and pollutant degradation

Chromium-modified Bi 4 Ti 3 O 12 photocatalyst: Application for hydrogen evolution and pollutant degradation

Bi2Ti2O7‐based pyrochlore nanoparticles and their superior photocatalytic activity under visible light

Hydrothermal synthesis of novel flower-like BiVO 4 /Bi 2 Ti 2 O 7 with superior photocatalytic activity toward tetracycline removal

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Electrospun Cr-doped Bi₄Ti₃O₁₂/Bi₂Ti₂O₇ heterostructure fibers with enhanced visible-light photocatalytic properties

Bi₂Ti₂O₇‐based pyrochlore nanoparticles and their superior photocatalytic activity under visible light