Fe-Ions Modified BiOBr Mesoporous Microspheres with Excellent Photocatalytic Property

Liu, Zhangsheng; Wu, BianTao; Zhu, Yabo; Yin, Dagin; Wang, Lianguo

doi:10.1007/s10562-012-0899-9

Cited by 56 publications

(28 citation statements)

References 30 publications

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“…The binding energies of both Bi 4f and Br 3d are close to the XPS results given by the previously reported literatures for BiOBr 31. The binding energies of both Bi 4f and Br 3d are close to the XPS results given by the previously reported literatures for BiOBr 31.…”

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confidence: 88%

In situ crystallization for fabrication of a core–satellite structured BiOBr–CdS heterostructure with excellent visible-light-responsive photoreactivity

et al. 2015

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We demonstrate the fabrication of a core-satellite structured BiOBr-CdS photocatalyst with highly efficient photocatalytic reactivity via a facile in situ crystallization approach at room temperature. The transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HR-TEM) results reveal that the BiOBr flakes are surrounded by CdS particles. The coverage of the satellites on the surface of the BiOBr nanosheets could be controlled by changing the content of the CdS, which contributes to the enhanced level of photocatalytic performance. The UV-vis diffuse reflection spectra demonstrate that the visible light absorption of the BiOBr-CdS photocatalyst is also enhanced by the CdS loaded. The excellent structural and spectral properties endow the BiOBr-CdS heterojunctions with improved photocatalytic performance pertaining to bisphenol A (BPA) degradation and photocurrent generation. Under visible light irradiation, the optimum photocatalytic activity of BiOBr-CdS at a molar ratio of 1 : 5 (CdS/BiOBr) is almost 2.8 times and 24.6 times as high as that of pure BiOBr and CdS. The remarkably enhanced photoreactivity should be attributed to the match in the energy levels and close core-satellite structural coupling between the CdS and BiOBr, which greatly facilitates the separation and transfer of photoinduced electron-hole pairs, as confirmed by photoluminescence (PL) and electrochemical impedance spectra (EIS). The present work sheds new light on the construction of highly efficient core-satellite heterojunctional photocatalysts for practical applications.

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confidence: 88%

In situ crystallization for fabrication of a core–satellite structured BiOBr–CdS heterostructure with excellent visible-light-responsive photoreactivity

et al. 2015

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“…It has been reported that the introduction of Fe 3+ ions can induce a morphology transformation in bismuth oxyhalides. 46,47 The results from the TEM images in our work indicate that the Fe 3+ ions can induce the self-assembly of BiOCl nanosheets to form hierarchical micro-owers. For Fe doped BiOBr, the morphology transformation was ascribed to the oriented attachment and Ostwald ripening.…”

Section: Characterization Of Catalyst Fe/biocl-fcsba-15mentioning

confidence: 60%

Natural kaolin derived stable SBA-15 as a support for Fe/BiOCl: a novel and efficient Fenton-like catalyst for the degradation of 2-nitrophenol

et al. 2015

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The ordered mesoporous material with an enhanced hydrothermal stability was successfully synthesized from natural kaolin in the presence of a fluorocarbon surfactant. FCSBA-15 was further used as the support for Fe/BiOCl with the aim of exploring its Fenton-like catalytic performance toward the degradation of 2-nitrophenol. Based on characterization techniques including X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), no phases referring to the Fe species were observed, suggesting that the Fe 3+ ions may be present on the surface of flower-like BiOCl. It is noted that the Fe 3+ ions could lead to a morphological reconstruction from BiOCl nanosheets to BiOCl flowers. The obtained Fe/BiOCl-FCSBA-15 exhibited an excellent degradation efficiency for 2-nitrophenol, which reached nearly 100% within 40 min by optimizing parameters such as the H 2 O 2 dosage, pH value, temperature, Fe/Bi molar ratio and Bi/Si molar ratio. The finding reported here is important and may help to develop novel mesoporous matrix based systems for advanced catalysts.

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“…[28][29][30][31][32] The n value is determined by the type of optical transition characteristics of a semiconductor (n ¼ 1 for direct transition and n ¼ 4 for indirect transition). [28][29][30][31][32] The n value is determined by the type of optical transition characteristics of a semiconductor (n ¼ 1 for direct transition and n ¼ 4 for indirect transition).…”

Section: Resultsmentioning

confidence: 99%

“…Numerous semiconductors with narrow band gap have recently been studied as visible light harvesting photocatalysts. Up to date, some strategies have been carried out, which includes the controlling synthesis of BiOX with specic morphology and structure, [12][13][14][15][16] constructing BiOX-based composites with other semiconductors (such as TiO 2 , 17 ZnO, 18 27 ) and doping with metal atoms [28][29][30][31][32] (such as Ag, Al, Fe, Ti, Mn). [4][5][6][7][8] All of the BiOX crystallize in the tetragonal matlockite structure comprising of [Bi 2 O 2 ] 2+ slabs interleaved by double slabs of halogen atoms.…”

Section: Introductionmentioning

confidence: 99%

Controllable in situ synthesis of BiOBr_xI_1−x solid solution on reduced graphene oxide with enhanced visible light photocatalytic performance

et al. 2015

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Novel composite photocatalysts, BiOBr x I 1Àx -rGO, were facilely prepared by in situ controllable deposition of BiOBr x I 1Àx solid solutions onto the surface of graphene oxide which was then reduced at mild conditions. The high-resolution transmission electron microscopy results revealed an intimate interface between BiOBr x I 1Àx and rGO in the composites. The UV-vis diffuse reflectance spectra showed that BiOBr x I 1Àx -rGO composites had intense optical absorption in the visible light region. These excellent structural and spectral properties endowed BiOBr x I 1Àx -rGO composites with enhanced photocatalytic performance.Significantly, the BiOBr 0.6 I 0.4 -rGO sample exhibited the best photocatalytic activity for the photodegradation of methyl orange under visible light irradiation (l > 420 nm). The enhanced photocatalytic activity could be attributed to more effective charge separation and transportation, and increased light absorption. The radical trapping experiments confirmed that holes and superoxide radical species were the two main reactive species in the photocatalysis process. Moreover, this material exhibited great stability and durability, which retained more than 80% degradation after several cycles. À ) with strongly oxidizing property. It has been reported that graphene (or reduced graphene oxides, rGO) based composite photocatalysts, such as graphene/BiOBr, 43 graphene/ BiOI, 44 graphene/BiOBr 0.8 I 0.2 45 and graphene/BiOCl, 46 exhibited

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Fe-Ions Modified BiOBr Mesoporous Microspheres with Excellent Photocatalytic Property

Cited by 56 publications

References 30 publications

In situ crystallization for fabrication of a core–satellite structured BiOBr–CdS heterostructure with excellent visible-light-responsive photoreactivity

In situ crystallization for fabrication of a core–satellite structured BiOBr–CdS heterostructure with excellent visible-light-responsive photoreactivity

Natural kaolin derived stable SBA-15 as a support for Fe/BiOCl: a novel and efficient Fenton-like catalyst for the degradation of 2-nitrophenol

Controllable in situ synthesis of BiOBr_xI_1−x solid solution on reduced graphene oxide with enhanced visible light photocatalytic performance

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Fe-Ions Modified BiOBr Mesoporous Microspheres with Excellent Photocatalytic Property

Cited by 56 publications

References 30 publications

In situ crystallization for fabrication of a core–satellite structured BiOBr–CdS heterostructure with excellent visible-light-responsive photoreactivity

In situ crystallization for fabrication of a core–satellite structured BiOBr–CdS heterostructure with excellent visible-light-responsive photoreactivity

Natural kaolin derived stable SBA-15 as a support for Fe/BiOCl: a novel and efficient Fenton-like catalyst for the degradation of 2-nitrophenol

Controllable in situ synthesis of BiOBrxI1−x solid solution on reduced graphene oxide with enhanced visible light photocatalytic performance

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Controllable in situ synthesis of BiOBr_xI_1−x solid solution on reduced graphene oxide with enhanced visible light photocatalytic performance