Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 650, Issue -, Pages 193-198Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.07.164
Keywords
TiO2 quantum dots; Sol-gel method; Indigo carmine dye; Photocatalytic degradation
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Funding
- UGC (Major Project), Government of India [41-364/2012 (SR)]
- TEQIP-II grant of Dr. S.S.B. UICET, Panjab University Chandigarh
- DST PURSE grant-II of Dr. S.S.B. UICET, Panjab University Chandigarh
- Ministry of Higher Education, Kingdom of Saudi Arabia under the Promising Centre for Sensors and Electronic Devices (PCSED) at Najran University, Saudi Arabia
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In this work, we report the synthesis of TiO2 quantum dots using a simple sol-gel, template free method. The synthesized quantum dots were further studied for their crystalline, morphological, chemical and photo-luminescent properties by using various techniques. The detailed studies revealed that the synthesized TiO2 quantum dots possess well-crystalline pure anatase phase and exhibited good photoluminescent properties. Further, the catalytic behavior of synthesized quantum dots was monitored by photo-catalytic degradation of aqueous solution of Indigo carmine dye under UV-light irradiation. The reaction conditions were varied so as to optimize catalyst dose, initial dye concentration, pH and reaction temperature. It was found that reaction was facilitated with optimum catalyst dose of 0.75 g/L, low dye concentrations, acidic pH and ambient reaction temperature condition of 25 degrees C. The reaction kinetic was studied and it was found that the indigo carmine dye photo catalytic degradation followed pseudo first order reaction kinetics with rate constant, k of 0.023 min(-1). (C) 2015 Elsevier B.V. All rights reserved.
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