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Nanocomposite of Ag–AgBr–TiO2 as a photoactive and durable catalyst for degradation of volatile organic compounds in the gas phase

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Title: Nanocomposite of Ag–AgBr–TiO2 as a photoactive and durable catalyst for degradation of volatile organic compounds in the gas phase
Authors: Zhang, Yanhui1,2, Tang, Zi-Rong1, Fu, Xianzhi1,2, Xu, Yi-Jun1,2 yjxu@fzu.edu.cn
Source: Applied Catalysis B: Environment & Energy. Aug2011, Vol. 106 Issue 3/4, p445-452. 8p.
Subjects: Nanocomposite materials, Silver catalysts, Titanium dioxide, Photocatalysis, Photodegradation, Volatile organic compounds, Precipitation (Chemistry), Fourier transform infrared spectroscopy, Transmission electron microscopy, Chemical reactions
Abstract: Abstract: The nanocomposites of Ag–AgBr–TiO2 photocatalyst have been prepared by a simple deposition–precipitation method, which is used for the gas-phase degradation of volatile organic pollutants of aromatic benzene and non-aromatic acetone that are notorious volatile organic compounds (VOCs) present in indoor and outdoor air. A collection of joint techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultraviolet/visible diffuse reflectance spectra (UV/vis DRS) have been employed to determine the structure, morphology and optical properties of the as-prepared Ag–AgBr–TiO2 nanocomposite. The presence of surface Ag species existed as Ag (0) and Ag (I) in Ag–AgBr–TiO2 is confirmed by the analysis of X-ray photoelectron spectroscopy (XPS). The Fourier transformed infrared spectroscopy (FT-IR) analysis shows the enhanced chemical bonding of O–Ti and O–Ti–O after the deposition of AgBr and Ag species onto the surface of TiO2. It is found that the Ag–AgBr–TiO2 nanocomposite exhibits much higher photocatalytic activity and stability under both UV light and visible light irradiation as compared with that over commercial titania (Degussa P25) toward the gas-phase degradation of both aromatic benzene and non-aromatic acetone. The active radical species involved for degradation reactions over the Ag–AgBr–TiO2 photocatalyst have been investigated by the spin-trapping electron paramagnetic resonance (EPR) spectra and the ng photoluminescence (PL) spectra. Synergetic effects between Ag–AgBr and TiO2 have been observed and discussed for the gas-phase degradation of volatile organic compounds on the basis of joint results of characterization and photocatalytic activity. [Copyright &y& Elsevier]
Copyright of Applied Catalysis B: Environment & Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 63562194
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Nanocomposite of Ag–AgBr–TiO<subscript>2</subscript> as a photoactive and durable catalyst for degradation of volatile organic compounds in the gas phase
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Yanhui%22">Zhang, Yanhui</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Tang%2C+Zi-Rong%22">Tang, Zi-Rong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fu%2C+Xianzhi%22">Fu, Xianzhi</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Xu%2C+Yi-Jun%22">Xu, Yi-Jun</searchLink><relatesTo>1,2</relatesTo><i> yjxu@fzu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Applied+Catalysis+B%3A+Environment+%26+Energy%22">Applied Catalysis B: Environment & Energy</searchLink>. Aug2011, Vol. 106 Issue 3/4, p445-452. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Silver+catalysts%22">Silver catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Volatile+organic+compounds%22">Volatile organic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Precipitation+%28Chemistry%29%22">Precipitation (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopy%22">Transmission electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink>
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  Data: Abstract: The nanocomposites of Ag–AgBr–TiO2 photocatalyst have been prepared by a simple deposition–precipitation method, which is used for the gas-phase degradation of volatile organic pollutants of aromatic benzene and non-aromatic acetone that are notorious volatile organic compounds (VOCs) present in indoor and outdoor air. A collection of joint techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultraviolet/visible diffuse reflectance spectra (UV/vis DRS) have been employed to determine the structure, morphology and optical properties of the as-prepared Ag–AgBr–TiO2 nanocomposite. The presence of surface Ag species existed as Ag (0) and Ag (I) in Ag–AgBr–TiO2 is confirmed by the analysis of X-ray photoelectron spectroscopy (XPS). The Fourier transformed infrared spectroscopy (FT-IR) analysis shows the enhanced chemical bonding of O–Ti and O–Ti–O after the deposition of AgBr and Ag species onto the surface of TiO2. It is found that the Ag–AgBr–TiO2 nanocomposite exhibits much higher photocatalytic activity and stability under both UV light and visible light irradiation as compared with that over commercial titania (Degussa P25) toward the gas-phase degradation of both aromatic benzene and non-aromatic acetone. The active radical species involved for degradation reactions over the Ag–AgBr–TiO2 photocatalyst have been investigated by the spin-trapping electron paramagnetic resonance (EPR) spectra and the ng photoluminescence (PL) spectra. Synergetic effects between Ag–AgBr and TiO2 have been observed and discussed for the gas-phase degradation of volatile organic compounds on the basis of joint results of characterization and photocatalytic activity. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Applied Catalysis B: Environment & Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.apcatb.2011.06.002
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 445
    Subjects:
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Silver catalysts
        Type: general
      – SubjectFull: Titanium dioxide
        Type: general
      – SubjectFull: Photocatalysis
        Type: general
      – SubjectFull: Photodegradation
        Type: general
      – SubjectFull: Volatile organic compounds
        Type: general
      – SubjectFull: Precipitation (Chemistry)
        Type: general
      – SubjectFull: Fourier transform infrared spectroscopy
        Type: general
      – SubjectFull: Transmission electron microscopy
        Type: general
      – SubjectFull: Chemical reactions
        Type: general
    Titles:
      – TitleFull: Nanocomposite of Ag–AgBr–TiO2 as a photoactive and durable catalyst for degradation of volatile organic compounds in the gas phase
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            NameFull: Zhang, Yanhui
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            NameFull: Tang, Zi-Rong
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            NameFull: Fu, Xianzhi
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            NameFull: Xu, Yi-Jun
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              M: 08
              Text: Aug2011
              Type: published
              Y: 2011
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              Value: 106
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              Value: 3/4
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            – TitleFull: Applied Catalysis B: Environment & Energy
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