Conventional and Microwave‐Hydrothermal Synthesis of TiO₂ Nanopowders

Abstract

The objective of this study was to compare the conventional and microwave hydrothermal treatment of TiOCl 2 solutions. Colloidal titania suspensions were prepared by forced hydrolysis at 1951C for different times ranging from 1 to 32 h for the conventional synthesis and from 5 min to 1 h for the microwave ones. The effect of the microwave technology on both the synthesis conditions and titania nanoparticles properties has been evaluated. Particles morphology and crystallinity were studied by using transmission electron microscopy and X-ray diffraction. The thermal and chemical stability of the obtained powders were determined by TG/DTA analysis.

Preparation Techniques of TiO2 Nanofluids and Challenges: A Review

“…Corradi et al [56] made a comparison of conventional and microwave hydrothermal synthesis for the preparation of TiO 2 nanopowder and found that the powder synthesized via microwave hydrothermal synthesis was more crystalline and took less time compared to the conventional one. A solution of TiOCl (0.5 M) was used as the starting material and the hydrothermal process was carried out by using a microwave at 195 • C and varying the time from 5 min to 1 h. Parameters like temperature and pressure were monitored by a computer control system.…”

Hydrothermal Synthesis of Nanodispersed Titanium Dioxide

“…Серед них можна виділити: золь-гель метод [21][22][23], метод осадження з безводного рідинного середовища [24][25][26], гідротермальний [27][28][29], темплатний [30][31][32], сольвотермальний [33][34][35] методи, метод анодного окиснення [36], міцелярний метод [37][38], хімічне осадження з парової фази [39], сонохімічний [40][41][42], та мікрохвильовий [43][44][45] методи. Проте, саме гідро-термальна обробка відкриває широкі можливості для керування морфологією TiO 2 та розміром і ступенем кристалічності його частинок [46].…”

Synthetic Methods for Titanium Dioxide Nanoparticles: A Review

“…This technique provides uniform distribution of energy within the sample, better reproducibility and excellent control of experimental parameters. The colloidal TiO 2 nanoparticles can be prepared in a short period of time (within 5-60 min) compared to several hours needed for the conventional methods of forced hydrolysis at high temperatures (~195°C) [41]. TiO 2 nanotubes which are open-ended and multi-walled with diameters of 8-12 nm and lengths between 200 and 1000 nm were also prepared using this method [33].…”