Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light

被引：11

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, Fac Chem, Nezavisimosti Ave 4, Minsk 220030, BELARUS

[3] Helmholtz Zentrum Geesthacht, Ctr Mat & Coastal Res GmbH, Max Planck Str 1, D-21502 Geesthacht, Germany

[4] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Mat & Ceram Engn, Campus Univ Santiago, P-3810193 Aveiro, Portugal

来源：

MATERIALS TODAY-PROCEEDINGS | 2018年 / 5卷 / 09期

基金：

欧盟地平线“2020”;

关键词：

Titanium dioxide; Mesoporous materials; Sol gel; Carbon-doped; Photocatalysis; THIN-FILMS;

D O I：

10.1016/j.matpr.2018.06.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mesoporous TiO2 powders with an anatase framework were synthesized through surfactant-assisted template method. The concentrated titania sol (7-8 wt.%) prepared from TiCl4 as a precursor was used in this synthesis. The soluble triblock copolymer Pluronic F127 was employed as a structure-directing agent and a carbon precursor to fabricate the carbon-doped mesoporous titania. The synthesized powders were characterized by XRD, HRTEM, Raman spectroscopy, UV-Vis reflectance spectroscopy, N-2 adsorption/desorption and TG/DSC methods. The mesoporous titania annealed at 350 degrees C was shown to have a high specific surface area up to 192 m(2)/g and a narrow pore size distribution. After annealing, carbon species in graphitic form were detected in the template-prepared TiO2 samples using Raman spectroscopy measurements. The photocatalytic performance of the samples was characterized in the process of Rhodamine B decomposition under visible light irradiation. The enhanced visible light photocatalytic efficiency of the template-prepared TiO2 powders as compared with that of Degussa P25 can be attributed to the associated effects of high specific surface area, pure anatase crystalline structure and carbon doping. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：17422 / 17430

页数：9

共 16 条

[1] SYNTHESIS OF HEXAGONALLY PACKED MESOPOROUS TIO2 BY A MODIFIED SOL-GEL METHOD [J].