Rational Design of Ag/TiO2 Nanosystems by a Combined RF-Sputtering/Sol-Gel Approach

被引:62
作者
Armelao, Lidia [1 ,2 ]
Barreca, Davide [1 ,2 ]
Bottaro, Gregorio [3 ,4 ]
Gasparotto, Alberto [1 ]
Maccato, Chiara
Tondello, Eugenio
Lebedev, Oleg I. [5 ]
Turner, Stuart [5 ]
Van Tendeloo, Gustaaf [5 ]
Sada, Cinzia [6 ,7 ]
Stangar, Urska Lavrencic [8 ]
机构
[1] Univ Padua, Dept Chem, CNR, ISTM, I-35131 Padua, Italy
[2] Univ Padua, Dept Chem, INSTM, I-35131 Padua, Italy
[3] Univ Bari, Dept Chem, CNR, IMIP, I-70126 Bari, Italy
[4] Univ Bari, Dept Chem, INSTM, I-70126 Bari, Italy
[5] Univ Antwerp, Elect Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium
[6] Univ Padua, Dept Phys, I-35131 Padua, Italy
[7] Univ Padua, CNISM, I-35131 Padua, Italy
[8] Nova Gorica Univ, Environm Res Lab, Nova Gorica 5001, Slovenia
关键词
Ag/TiO2; nanocomposites; photocatalysis; radio-frequency sputtering; sol-gel processes; MESOPOROUS ANATASE TIO2; PHOTOCATALYTIC ACTIVITY; TITANIUM-DIOXIDE; THIN-FILMS; SILVER; AG; AG-TIO2; AU; DEGRADATION; PARTICLES;
D O I
10.1002/cphc.200900571
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 present work is devoted to the preparation of Ag/TiO2 nanosystems by an original synthetic strategy, based on the radio-frequency (RF) sputtering of silver particles on titania-based xerogels prepared by the sol-gel (SG) route. This approach takes advantage of the synergy between the microporous xerogel structure and the infiltration power characterizing RF-sputtering, whose combination enables the obtainment of a tailored dispersion of Ag-containing particles into the titania matrix. In addition, the system's chemico-physical features can be tuned further through proper ex situ thermal treatments in air at 400 and 600 degrees C. The synthesized composites are extensively characterized by the joint use of complementary techniques, that is, X-ray photoelectron and X-ray excited Auger electron spectroscopies (XPS, XE-AES), secondary ion mass spectrometry (SIMS), glancing incidence X-ray diffraction (GIXRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), electron diffraction (ED), high-angle annular dark field scanning TEM (HAADF-STEM), energy-filtered TEM (EF-TEM) and optical absorption spectroscopy. Finally, the photocatalytic performances of selected samples in the decomposition of the azo-dye Plasmocorinth B are preliminarily investigated. The obtained results highlight the possibility of tailoring the system characteristics over a broad range, directly influencing their eventual functional properties.
引用
收藏
页码:3249 / 3259
页数:11
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