科研之友
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摘要
A method for obtaining titanium dioxide (TiO2) nanoparticles by laser ablation has been developed. Pulsed laser irradiation at an intensity of 10(9) W/m(2) leads to sputtering of titanium dioxide in the form of particles with dimensions within 10-50 nm. The phase composition and morphology of obtained nanoparticles have been studied by the methods of transmission electron microscopy and X-ray diffraction. Thermal annealing above 600A degrees C leads to an increase in the average particle size and induces the structural transition of titanium dioxide from anatase to rutile modification. Quantitative dependences of the particle size and phase composition on the annealing temperature are established. It is established that, using the laser ablation method, it is possible to obtain the anatase phase of TiO2 with increased thermal stability.
- 出版日期2012-4
