Abstract
Titania pillared zirconium phosphate (ZrP) and titanium phosphate (TiP) were prepared by intercalating Ti (IV) isopropoxide sol in the interlayers of the mono sodium form of the corresponding metal phosphate. The sol-intercalated samples were activated at various temperatures and characterized by XRD, UV–vis DRS, FTIR, BET-surface area, BJH-pore size distribution and acid sites measurement. Basal spacing and surface area analyses revealed that highest amount of pillaring has taken place with 2 and 4 wt.% titania loading for ZrP and TiP, respectively. The photocatalytic degradation of 4-nitrophenol (4-NP), phenol, methylene blue (MB) and hexavalent chromium (Cr (VI)) was studied in aqueous solution over the neat as well as pillared materials under solar irradiation. Catalytic activity tests revealed that hexavalent chromium (Cr (VI)) and 4-nitrophenol (4-NP) were completely degraded under acidic conditions, whereas, the same was observed in almost neutral conditions for phenol and methylene blue (MB) over 0.6 g/L of catalyst.
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Notes
E g = 1239.8/λ (nm) where E g is band gap energy in eV and λ is the wavelength of absorption maxima in nm.
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Acknowledgements
Authors are very much thankful to Prof. B. K. Mishra, Director, Institute of Minerals and Material Technology (CSIR), Bhubaneswar for his keen interest and permission to publish the present work. One of the authors DPD is thankful to CSIR, New Delhi for a Research Associateship.
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Das, D.P., Parida, K.M. Solar Light Induced Photocatalytic Degradation of Pollutants over Titania Pillared Zirconium Phosphate and Titanium Phosphate. Catal Surv Asia 12, 203–213 (2008). https://doi.org/10.1007/s10563-008-9052-6
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DOI: https://doi.org/10.1007/s10563-008-9052-6