Detailed Spectroscopic and Structural Analysis of TiO2/WO3 Composite Semiconductors

被引：22

作者：

Boga, Biborka ^{[1
]}

Szekely, Istvan ^{[2
,3
]}

Pap, Zsolt ^{[2
,3
,4
]}

Baia, Lucian ^{[2
,3
]}

Baia, Monica ^{[2
,3
]}

机构：

[1] Babes Bolyai Univ, Fac Chem & Chem Engn, Arany Janos 11, Cluj Napoca 400028, Romania

[2] Inst Interdisciplinary Res Bionanosci, Nanostruct Mat & Bionanointerfaces Ctr, Treboniu Laurian 42, Cluj Napoca 400271, Romania

[3] Babes Bolyai Univ, Fac Phys, Mihail Kogalniceanu 1, Cluj Napoca 400084, Romania

[4] Inst Environm Sci & Technol, Tisza Lajos Krt 103, H-6720 Szeged, Hungary

来源：

JOURNAL OF SPECTROSCOPY | 2018年 / 2018卷

关键词：

GAS-SENSING PROPERTIES; PHOTOCATALYTIC ACTIVITY; HYDROTHERMAL SYNTHESIS; WO3; DEGRADATION; FILMS; EFFICIENT; SINGLE; AU;

D O I：

10.1155/2018/6260458

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

WO3-TiO2 composite materials were obtained using commercial titania (Evonik Aeroxide P25) and hydrothermally crystallized WO3. Different ratios of TiO2/WO3 were investigated, starting at 1 wt.% of WO3 to 50 wt.%. The morphology of WO3 was of the star-like type, and its structure is basically composed of monoclinic crystalline phase. All spectroscopic characteristics of the composites and their derived data (band-gap energy value, light absorption threshold, and IR specific bands) directly varied with the increase of the WO3 content. However, the oxalic acid photodegradation achieved under UV light reached the highest yield for 24 wt.% WO3 content, a result that was attributed to the charge separation efficiency and the surface hydrophilicity. The latter mentioned reason points out the crucial importance of the surface quality of the investigated structure in photocatalytic tests.

引用

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