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.

引用

页码：589 / 600

页数：12

共 45 条

[1] Flame-made WO3/TiO2 nanoparticles:: Relation between surface acidity, structure and photocatalytic activity [J].

Akurati, Kranthi K. ;

Vital, Andri ;

Dellemann, Jean-Philippe ;

Michalow, Katarzyna ;

Graule, Thomas ;

Fetti, Davide ;

Baiker, Alfons .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 79 (1-2) :53-62

[2] Synthesis and nanostructural characterization of TiO2 aerogels for photovoltaic devices [J].

Baia, L. ;

Peter, A. ;

Cosoveanu, V. ;

Indrea, E. ;

Baia, M. ;

Popp, J. ;

Danciu, V. .

THIN SOLID FILMS, 2006, 511 :512-516

[3] Gold nanostructured films deposited on polystyrene colloidal crystal templates for surface-enhanced Raman spectroscopy [J].

Baia, M ;

Baia, L ;

Astilean, S .

CHEMICAL PHYSICS LETTERS, 2005, 404 (1-3) :3-8

[4] Nanostructured tungsten oxide with controlled properties: Synthesis and Raman characterization [J].

Baserga, A. ;

Russo, V. ;

Di Fonzo, F. ;

Bailini, A. ;

Cattaneo, D. ;

Casari, C. S. ;

Bassi, A. Li ;

Bottani, C. E. .

THIN SOLID FILMS, 2007, 515 (16) :6465-6469

[5] THE GROWTH AND STRUCTURE OF TITANIUM-OXIDE FILMS ON PT(111) INVESTIGATED BY LEED, XPS, ISS, AND STM [J].

BOFFA, AB ;

GALLOWAY, HC ;

JACOBS, PW ;

BENITEZ, JJ ;

BATTEAS, JD ;

SALMERON, M ;

BELL, AT ;

SOMORJAI, GA .

SURFACE SCIENCE, 1995, 326 (1-2) :80-92

[6] Preparation of freestanding and crack-free titania-silica aerogels and their performance for gas phase, photocatalytic oxidation of VOCs [J].

Cao, Shengli ;

Yeung, King Lun ;

Yue, Po-Lock .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 68 (3-4) :99-108

[7] XAFS experiments at beamline I811, MAX-lab synchrotron source, Sweden [J].

Carlson, Stefan ;

Clausen, Maria ;

Gridneva, Lidia ;

Sommarin, Bengt ;

Svensson, Christer .

JOURNAL OF SYNCHROTRON RADIATION, 2006, 13 :359-364

[8] TiO2-SnO2 nanostructures and their H2 sensing behavior [J].

Carney, CM ;

Yoo, S ;

Akbar, SA .

SENSORS AND ACTUATORS B-CHEMICAL, 2005, 108 (1-2) :29-33

[9] LASER RAMAN CHARACTERIZATION OF TUNGSTEN-OXIDE SUPPORTED ON ALUMINA - INFLUENCE OF CALCINATION TEMPERATURES [J].

CHAN, SS ;

WACHS, IE ;

MURRELL, LL ;

DISPENZIERE, NC .

JOURNAL OF CATALYSIS, 1985, 92 (01) :1-10

[10]

Chen D. M., 2010, J APPL PHYS, P107

← 1 2 3 4 5 →