Pol VG, Langzam Y, Zaban A. Application of microwave superheating for the synthesis of TiO2 rods.
LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007;
23:11211-6. [PMID:
17892315 DOI:
10.1021/la7020116]
[Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
A simple microwave irradiation method for the large-scale synthesis of submicrometer-sized TiO2 rods at normal atmospheric pressure and the boiling temperature of the solvent is demonstrated. It is emphasized that only 1-3 min of microwave irradiation is adequate to react tetra-isopropyl orthotitanate with ethylene glycol to produce rods of titanium glycolate [TG] with diameters of approximately 0.4 microm and lengths up to 5 microm. The as-formed TG rods, followed by calcination under air for 2 h, fabricated anatase (500 degrees C) and rutile (900 degrees C) titania without changing their rod-shaped morphology. The crystallinity, structure, morphology, and thermal analysis are carried out by several techniques. A mechanism based on microwave superheating phenomena is presented with the support of previous reports and several control experiments.
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