Synthesis and characterization of efficient TiO2 mesoporous photocatalysts

被引：3
|
作者：
Ovodok, Evgeni [1 ]
Maltanava, Hanna [1 ]
Poznyak, Sergey [1 ]
Ivanovskaya, Maria [1 ]
Kudlash, Alexander [2 ]
Scharnagl, Nico [3 ]
Tedim, Joao [4 ]
机构：
[1] Belarusian State Univ, Res Inst Phys Chem Problems, Leningradskaya Str 14, Minsk 220030, BELARUS
[2] Belarusian State Univ, Chem Dept, Nezavisimosti Ave 4, Minsk 220030, BELARUS
[3] Helmholtz Zentrum Geesthacht Ctr Mat & Coastal Re, Max Planck Str 1, D-21502 Geesthacht, Germany
[4] Univ Aveiro, Dept Mat & Ceram Engn, CICECO Aveiro Inst Mat, Campus Univ Santiago, P-3810193 Aveiro, Portugal
来源：
MATERIALS TODAY-PROCEEDINGS | 2017年 / 4卷 / 11期
基金：
欧盟地平线“2020”;
关键词：
Titanium dioxide; Mesoporous materials; Photocatalyst; TITANIUM-DIOXIDE; FUNDAMENTALS; MECHANISMS; POROSITY; ROUTE;
D O I：
10.1016/j.matpr.2017.09.062
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：11526 / 11533
页数：8
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