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Title: Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
Author: Ovodok, Evgeni
Maltanava, Hanna
Poznyak, Sergey
Ivanovskaya, Maria
Kudlash, Alexander
Scharnagl, Nico
Tedim, João
Keywords: Titanium dioxide
Mesoporous materials
Issue Date: 2017
Publisher: Elsevier
Abstract: Mesoporous TiO2 powder with large surface area and high porosity was prepared via template-free method of heat-stimulated oxidizing destruction of TiC by HNO3. Anatase crystalline phase of as-prepared and annealed at 200−400 °C titania was confirmed by XRD technique. Surface nitrate-nitro groups responsible for high adsorption capacity of the TiO2 powders were studied by FTIR spectroscopy. The annealing temperature can be used as a factor for regulation of titania morphology and structural properties. The rise in the annealing temperature higher than the temperature of nitrate-nitro groups decomposition induces the growth of TiO2 crystallites, decreasing porosity and surface area, the drop of adsorption capacity, and improving photocatalytic activity under UV irradiation.
Peer review: yes
DOI: 10.1016/j.matpr.2017.09.062
Appears in Collections:CICECO - Artigos

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