Non-aqueous solvothermal route to prepare monodispersed titanium dioxide nanoparticles suspension-ISBN: 978-979-16978-0-4

Irawaty, Wenny (2007) Non-aqueous solvothermal route to prepare monodispersed titanium dioxide nanoparticles suspension-ISBN: 978-979-16978-0-4. In: 14th Regional Symposium on Chemical Engineering, 4-5 December 2007, Yogyakarta.

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Abstract

Titanium dioxide (TiO2) has a potential application in advanced technologies such as solar cell, photo-induced self-cleaning, photoelectrochromic windows, gene therapy, catalysis, drug delivery, degradation of organic contaminants, photocatalysis, etc. Due to these wide applications, the study of TiO2 has attracted increasing attention and a number of TiO2 nanostructures, including nanoparticles, nanorods, nanotubes, nanowires, hollow spheres have been reported to date. In this research, for coating application, we aim to prepare the transparent suspension of titanium dioxide containing nearly mono-dispersed nanoparticles. Non-aqueous solvothermal method is chosen to obtain high crystalline of TiO2 at low temperature. The solvothermal reactions are carried out in a sealed autoclave that provides suitable conditions for hydrolysis, polycondensation reactions and formation of nanoparticles. The suspension was prepared by stirring ammonium bicarbonate, triethylamine, ethyl acetate and linoleic acid in a flask. Titanium tetra-t-butoxide was added dropwise into the solution and stirred for 5 minutes. Different volume of linoleic acid was added. Then the solution was transferred and sealed in a stainless autoclave and heated at different temperatures for 24 hours without stirring. The collected products of TiO2 were characterized using X-ray diffractions (XRD), Zetasizer and TEM (Transmission Electron Microscopy). The results showed that the increase of temperature from 130 to 180oC and linoleic acid from 7 to 25 mL promote the colour of the suspensions are darker. Since ester C17H31COOC4H9 was formed, the average particle size is increased with the volume of linoleic acid. The amount of catalyst promotes the nanoparticles reactions. A better suspension is obtained by adding triethylamine as catalyst. The suspension color is transparent and the particle size is between 21 and 27 nm. XRD patterns showed that this nanoparticles have a good structure, i.e. anatase. The stable and transparent suspension was obtained by non-aqueous route at 150oC. This suspension can be applied for coating purpose.

Item Type: Conference or Workshop Item (Paper)
Additional Information: ISBN: 978-979-16978-0-4
Uncontrolled Keywords: titanium dioxide, suspension, coating, non aqueous, solvothermal
Subjects: Engineering > Chemical Engineering
Divisions: Proceeding
Depositing User: Wenny Irawaty
Date Deposited: 07 May 2019 02:36
Last Modified: 08 Oct 2019 01:27
URI: http://repository.wima.ac.id/id/eprint/18246

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