Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
authors Ovodok, E; Maltanava, H; Poznyak, S; Ivanovskaya, M; Kudlash, A; Scharnagl, N; Tedim, J
nationality International
journal MATERIALS TODAY-PROCEEDINGS
author keywords Titanium dioxide; Mesoporous materials; Photocatalyst
keywords TITANIUM-DIOXIDE MATERIALS; HETEROGENEOUS PHOTOCATALYSIS; FUNDAMENTALS; CALCINATION; MECHANISMS; FRAMEWORK; POROSITY; ROUTE; ACID
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 degrees 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. (C) 2016 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 2214-7853
year published 2017
volume 4
issue 11
beginning page 11526
ending page 11533
digital object identifier (doi) 10.1016/j.matpr.2017.09.062
unique article identifier WOS:000416570200005
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