TiO2/WO3/Au nanoarchitectures' photocatalytic activity "from degradation intermediates to catalysts' structural peculiarities" Part II: Aerogel based composites - fine details by spectroscopic means

被引：25
作者：
Baia, L. [1 ,2 ]
Vulpoi, A. [1 ,2 ]
Radu, T. [1 ,2 ]
Karacsonyi, E. [3 ]
Dombi, A. [3 ]
Hernadi, K. [3 ]
Danciu, V. [4 ]
Simon, S. [1 ,2 ]
Noren, K. [5 ]
Canton, S. E. [6 ]
Kovacs, G. [1 ,4 ]
Pap, Zs [1 ,3 ,4 ]
机构：
[1] Univ Babes Bolyai, Fac Phys, RO-400084 Cluj Napoca, Romania
[2] Inst Interdisciplinary Res Bionanosci, RO-400271 Cluj Napoca, Romania
[3] Univ Szeged, Inst Chem, Res Grp Environm Chem, HU-6720 Szeged, Hungary
[4] Univ Babes Bolyai, Fac Chem & Chem Engn, RO-400082 Cluj Napoca, Romania
[5] Lund Univ, Ctr Chem, Dept Chem Phys, S-22241 Lund, Sweden
[6] Lund Univ, Dept Synchrotron Radiat Instrumentat, S-22100 Lund, Sweden
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2014年 / 148卷
关键词：
TiO2; aerogel; Tungsten (VI) oxide; Gold nanoparticles; Photodegradation intermediates; Phenol; TITANIUM-OXIDE FILMS; ELECTRONIC-STRUCTURE; TUNGSTEN-OXIDE; TIO2; NANOPARTICLES; SURFACE; GROWTH; WO3; CALCINATION; ANODIZATION;
D O I：
10.1016/j.apcatb.2013.12.034
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The "build-up" methodology of a composite photocatalyst is a critical issue regarding the showed photocatalytic performance, including the formation of intermediates. To investigate this issue TiO2/WO3/Au aerogel composites were obtained by sal-gel method and subsequent photoreduction (Au) with UV or visible light. The obtained composites' photocatalytic activity and intermediate formation profiles were evaluated using phenol as a model pollutant. XPS/UPS, XAFS and DRS were used to uncover local coordination, surface chemistry (of the different types of atoms (Ti, W, O and Au) and the band-structure (band-gap, possible electron transitions) of the obtained nanomaterials. The intermediates' evolution profile and structural peculiarities were successfully correlated and it was shown that each minor structural (bulk or surface) change has a significant impact on the photocatalytic activity and intermediate formation dynamics. (c) 2013 Elsevier B.V. All rights reserved.
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收藏
页码：589 / 600
页数：12
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