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Sol-Gel Low-Temperature Synthesis of Stable Anatase-Type TiO(2) Nanoparticles Under Different Conditions and its Photocatalytic Activity.
MedLine Citation:
PMID:  21668867     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In this work, TiO(2) nanoparticles in anatase phase was prepared by sol-gel low temperature method from titanium (IV) isopropoxide (TTIP) as titanium precursor in the presence of acetic acid (AcOH). The effects of synthesis parameters such as AcOH and water ratios, sol formation time, synthesis and calcination temperature on the photocatalytic activity of TiO(2) nanoparticles were evaluated. The resulting nanoparticles were characterized by X-ray diffraction (XRD), UV-Vis reflectance spectroscopy (DRS), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) techniques. Photocatalytic activity of anatase TiO(2) nanoparticles determined in the removal of C.I. Acid Red 27 (AR27) under UV light irradiation. Results indicate that with increasing AcOH/TTIP molar ratio from 1 to 10, sol formation time from 1 to 3 h and synthesis temperature from 0 to 25°C, increases crystallite size of synthesized nanoparticles. It was found that optimal conditions for low temperature preparation of anatase-type TiO(2) nanoparticles with high photocatalytic activity were as follows: TTIP:AcOH:water molar ratio 1:1:200, sol formation time 1 h, synthesis temperature 0°C and calcination temperature 450°C.
Authors:
Mohammad A Behnajady; Hamed Eskandarloo; Nasser Modirshahla; Mohammad Shokri
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-14
Journal Detail:
Title:  Photochemistry and photobiology     Volume:  -     ISSN:  1751-1097     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376425     Medline TA:  Photochem Photobiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Photochemistry and Photobiology © 2011 American Society for Photobiology.
Affiliation:
Department of Chemistry, Faculty of Science, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
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