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      Fabrication of mesoporous CuO/ZrO2-MCM-41 nanocomposites for photocatalytic reduction of Cr(VI)

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      Author(s)
      Nanda, B.
      Pradhan, A. C.
      Parida, K. M.
      Date
      2017
      Source Title
      Chemical Engineering Journal
      Print ISSN
      1385-8947
      Electronic ISSN
      1873-3212
      Publisher
      Elsevier
      Volume
      316
      Pages
      1122 - 1135
      Language
      English
      Type
      Article
      Item Usage Stats
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      421
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      Abstract
      Mesoporous nanocomposites of CuO/ZrO2–MCM-41 (CuO@ZM-41) was designed by incorporating mesoporous ZrO2 (Z) into the high surface area MCM-41 (M-41) framework followed by loading CuO by wetness impregnation method keeping Si/Zr ratio 10. The nanocomposites were studied under PXRD, N2 sorption, DRS spectra, FTIR, XPS, NMR, HRTEM and PL to evaluate structural, morphological, optical properties and also the mesoporosity nature of the samples. The photo-reduction of Cr6+ was performed over CuO@ZM-41 by varying pH, substrate concentration, and irradiation time and catalyst dose. Among all the catalysts, 2 CuO@ZM-41 was found to be efficient photocatalyst for the photo-reduction of Cr6+. Nearly 100% reduction of Cr6+ has been achieved by 2 CuO@ZM-41 within 30 min. Intra-particle mesoporosity, high surface area, presence of CuO nanorods and electron transfer properties are the key factors for enhancing the photo-reduction activity of 2CuO@ZM-41.
      Keywords
      CuO/ZrO2–MCM-41
      Catalysts
      Chromium compounds
      Fourier transform infrared spectroscopy
      Mesoporous materials
      Nanocomposites
      Nanorods
      Optical properties
      CuO/ZrO
      Electron transfer
      High surface area
      Irradiation time
      Photo reduction
      Substrate concentrations
      Synergistic effect
      Wetness impregnation
      Copper oxides
      Permalink
      http://hdl.handle.net/11693/37427
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.cej.2016.11.080
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      • Institute of Materials Science and Nanotechnology (UNAM) 2098
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