Fabrication of mesoporous CuO/ZrO2-MCM-41 nanocomposites for photocatalytic reduction of Cr(VI)
Date
2017Source Title
Chemical Engineering Journal
Print ISSN
1385-8947
Electronic ISSN
1873-3212
Publisher
Elsevier
Volume
316
Pages
1122 - 1135
Language
English
Type
ArticleItem Usage Stats
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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-41Catalysts
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