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Room temperature synthesis of titanium dioxide nanoparticles of different phases in water in oil microemulsion

DSpace at IIT Bombay

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Title Room temperature synthesis of titanium dioxide nanoparticles of different phases in water in oil microemulsion
 
Creator KESWANI, RK
GHODKE, H
SARKAR, D
KHILAR, KC
SRINIVASA, RS
 
Subject photocatalytic activity
tio2 particles
hydrothermal treatment
rutile tio2
anatase
surface
decomposition
powders
rutile
pseudobrookite
nanoparticles
microemulsion
titanium dioxide
 
Description We report the synthesis of crystalline titanium dioxide nanoparticles of two different phases (rutile and anomalous pseudobrookite) at room temperature by a novel microemulsion technique. In this method, one of the reactants (titanium tetrachloride) is dissolved in the continuous organic phase, whereas the second reactant (ammonium hydroxide) is added as an aqueous solution. The site of the reaction has been controlled by using two different addition methods for the second reactant. The size and the crystalline phase of the titanium dioxide nanoparticles varied according to the site of the reaction between the two reactants. Reaction in the aqueous core gives rutile titanium dioxide nanoparticles having an average size of 4.2 nm verified by X-ray diffraction and FTIR. The reaction in the organic phase gives rise to crystalline anomalous pseudobrookite titanium dioxide nanoparticles of much larger size (10-40 nm). This anomalous pseudobrookite structure is thermally unstable and converts to rutile on high temperature treatment. .
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-26T15:13:08Z
2011-12-26T12:54:51Z
2011-12-27T05:43:10Z
2011-07-26T15:13:08Z
2011-12-26T12:54:51Z
2011-12-27T05:43:10Z
2010
 
Type Article
 
Identifier COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 369(01\03), 75-81
0927-7757
http://dx.doi.org/10.1016/j.colsurfa.2010.08.001
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6939
http://hdl.handle.net/10054/6939
 
Language en