%0 Journal Article %1 noauthororeditor %A Hanaor, D %A Karatchevtseva, I %A Chironi, I %A Triani, G %A Sorrell, C %D 2012 %J Advances in Applied Ceramics %K Hydrolysis, Powders, Sol-gel TiO2 %N 3 %P 149-158 %T Single and mixed phase TiO2 powders prepared by excess hydrolysis of titanium alkoxide %U http://www.ingentaconnect.com/content/maney/aac/2012/00000111/00000003/art00006?token=004118c530d92ef4405847447b494a2f42407242576b66527e3375686f23f7773 %V 111 %X To investigate the excess hydrolysis of titanium alkoxides, TiO2 powders were fabricated from titanium tetraisopropoxide using 6:1 and 100:1 H2O/Ti (r) ratios. The powders were dried and fired at a range of temperatures (800°C). Hydroxylation and organic content in powders were characterised using attenuated total reflectance Fourier transform infrared spectroscopy (FTIR), laser Raman microspectroscopy and elemental microanalysis; surface area and pore size distribution were evaluated using N2 gas adsorption; phase composition was analysed using X-ray diffraction (XRD) and laser Raman microspectroscopy; and crystallite size was evaluated by XRD, TEM and SEM. Results showed near complete hydrolysis in a predominantly aqueous medium (r = 100), resulting in precipitated crystalline powders exhibiting brookite and anatase, which begin to transform to rutile below 500°C. The powders precipitated in a predominantly organic medium (r = 6) underwent partial hydrolysis, were highly porous and exhibited an amorphous structure, with the crystallisation of anatase occurring at ∼300°C and the transformation to rutile beginning at 500‐600°C.

@article{noauthororeditor, abstract = {To investigate the excess hydrolysis of titanium alkoxides, TiO2 powders were fabricated from titanium tetraisopropoxide using 6:1 and 100:1 H2O/Ti (r) ratios. The powders were dried and fired at a range of temperatures (800°C). Hydroxylation and organic content in powders were characterised using attenuated total reflectance Fourier transform infrared spectroscopy (FTIR), laser Raman microspectroscopy and elemental microanalysis; surface area and pore size distribution were evaluated using N2 gas adsorption; phase composition was analysed using X-ray diffraction (XRD) and laser Raman microspectroscopy; and crystallite size was evaluated by XRD, TEM and SEM. Results showed near complete hydrolysis in a predominantly aqueous medium (r = 100), resulting in precipitated crystalline powders exhibiting brookite and anatase, which begin to transform to rutile below 500°C. The powders precipitated in a predominantly organic medium (r = 6) underwent partial hydrolysis, were highly porous and exhibited an amorphous structure, with the crystallisation of anatase occurring at ∼300°C and the transformation to rutile beginning at 500‐600°C. }, added-at = {2012-05-09T02:47:57.000+0200}, author = {Hanaor, D and Karatchevtseva, I and Chironi, I and Triani, G and Sorrell, C}, biburl = {https://www.bibsonomy.org/bibtex/2c7ce31f253403e14451929a53e44a800/ceramics}, description = {ingentaconnect Single and mixed phase TiO<sub xmlns="http://pub2web.metastore.in...}, interhash = {26774c166e04d296acf9ffcce0853b2c}, intrahash = {c7ce31f253403e14451929a53e44a800}, journal = {Advances in Applied Ceramics}, keywords = {Hydrolysis, Powders, Sol-gel TiO2}, number = 3, pages = {149-158}, timestamp = {2012-05-09T02:47:57.000+0200}, title = {Single and mixed phase TiO2 powders prepared by excess hydrolysis of titanium alkoxide }, url = {http://www.ingentaconnect.com/content/maney/aac/2012/00000111/00000003/art00006?token=004118c530d92ef4405847447b494a2f42407242576b66527e3375686f23f7773}, volume = 111, year = 2012 }