Solar Light Induced Photocatalytic Degradation of Pollutants over Titania Pillared Zirconium Phosphate and Titanium Phosphate |
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Authors: | D P Das K M Parida |
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Institution: | (1) Colloids and Materials Chemistry Department, Institute of Minerals and Materials Technology (CSIR), Bhubaneswar, 751 013, Orissa, India |
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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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Keywords: | Titania pillared Surface area Solar radiation Kinetics Phenols Methylene blue Hexavalent chromium |
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