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IJC-A Vol.49A(09) [September 2010] >

Title: Synthesis, characterization and photocatalytic activity of alkaline earth metal doped titania
Authors: Avasarala, Balaram Kiran
Tirukkovalluri, Siva Rao
Bojja, Sreedhar
Keywords: Catalysts
Issue Date: Sep-2010
Publisher: CSIR
Abstract: The synthesis of beryllium doped titania (Be2+–TiO2) at different percentages (0.25, 0.5, 0.75 and 1.0 wt %) by sol-gel method and its characterization by XRD, UV-visible absorption spectroscopy, XPS, SEM and FT-IR techniques are reported. Diffraction peaks of anatase crystalline phase have been observed both in synthesized TiO2 as well as in Be2+–TiO2. Presence of Be2+ ions in the TiO2 structure causes significant absorption shift towards the visible region. FT-IR and XPS data show the interstitial presence of Be2+ ion in TiO2. The photocatalytic efficiency of the synthesized Be2+–TiO2 and unsubstituted TiO2 has been evaluated by the degradation of monocrotophos pesticide under visible light irradiation, wherein the degradation rate of MCP by Be2+–TiO2 is found to be higher than by unsubstituted TiO2. This may be attributed to the more efficient electron-hole creation in Be2+–TiO2 in visible light, as compared to unsubstituted TiO2 which can be excited only by UV irradiation. The effect of dopant concentration, pH, catalyst dosage and pollutant concentration have been studied for obtaining optimal degradation conditions.
Page(s): 1189-1196
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.49A(09) [September 2010]

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