WO3/TiO2 composite coatings: Structural, optical and photocatalytic properties

被引：63

作者：

Dohcevic-Mitrovic, Zorana ^{[1
]}

Stojadinovic, Stevan ^{[3
]}

Lozzi, Luca ^{[4
]}

Askrabic, Sonja ^{[1
]}

Rosic, Milena ^{[5
]}

Tomic, Natasa ^{[1
]}

Paunovic, Novica ^{[1
]}

Lazovic, Sasa ^{[2
]}

Nikolic, Marko G. ^{[2
]}

Santucci, Sandro ^{[4
]}

机构：

[1] Univ Belgrade, Inst Phys Belgrade, Ctr Solid State Phys & New Mat, Pregrevica 118, Belgrade 11080, Serbia

[2] Univ Belgrade, Inst Phys Belgrade, Pregrevica 118, Belgrade 11080, Serbia

[3] Univ Belgrade, Fac Phys, Studentski Trg 12-16, Belgrade 11000, Serbia

[4] Univ Aquila, Dept Phys & Chem Sci, Via Vetoio, I-67100 Laquila, Italy

[5] Univ Belgrade, Inst Nucl Sci, Mat Sci Lab, Vinca, POB 522, Belgrade 11001, Serbia

来源：

MATERIALS RESEARCH BULLETIN | 2016年 / 83卷

关键词：

Nanostructures; Oxides; Crystal structure; Optical properties; Catalytic properties; SOL-GEL SYNTHESIS; THIN-FILMS; DOPED TIO2; DEGRADATION; WO3; TITANIUM; NANOCOMPOSITES; NANOPARTICLES; NANOCRYSTALS; TEMPERATURE;

D O I：

10.1016/j.materresbull.2016.06.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

WO3/TiO2 and TiO2 coatings were prepared on titania substrates using facile and cost-effective plasma electrolytic oxidation process. The coatings were characterized by X-ray diffraction, scanning electron microscopy, Raman, UV vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. With increasing duration of PEO process, the monoclinic WO3 phase became dominant and new monoclinic WO2.95 phase appeared. The optical absorption edge in the WO3/TiO2 samples, enriched with WO3/WO2.96 phase, was shifted to the visible region. The photocatalytic efficiency of WO3/TiO2 and pure TiO2 samples was evaluated by performing the photodegradation experiments in an aqueous solution of Rhodamine 6G and Mordant Blue 9 under the visible and UV light. The WO3/TiO2 catalysts are much more efficient than pure TiO2 under visible light and slightly better under UV light. The improvement of photocatalytic activity in the visible region is attributed to better light absorption, higher adsorption affinity and increased charge separation efficiency. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：217 / 224

页数：8

共 54 条

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