Vapor Phase Synthesis, Characterization and Gas Sensing Performances of Co3O4 and Au/Co3O4 Nanosystems

被引:39
作者
Barreca, Davide [1 ,2 ]
Comini, Elisabetta [3 ]
Gasparotto, Alberto
Maccato, Chiara
Pozza, Andrea
Sada, Cinzia [4 ,5 ]
Sberveglieri, Giorgio [3 ]
Tondello, Eugenio
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 Brescia, Dept Chem & Phys, CNR IDASC, SENSOR Lab, I-25133 Brescia, Italy
[4] Univ Padua, Dept Phys, I-35131 Padua, Italy
[5] Univ Padua, CNISM, I-35131 Padua, Italy
关键词
Co3O4; Au/Co3O4; Nanosystems; Chemical Vapor Deposition; Gas Sensors; COBALT OXIDE; THIN-FILMS; SNO2-CO3O4; COMPOSITES; CO; DEPOSITION; MORPHOLOGY; CVD; PARTICLES; PRECURSOR; H-2;
D O I
10.1166/jnn.2010.3516
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Al2O3-supported Co3O4 nanosystems were grown by a Chemical Vapor Deposition route under O-2 + H2O atmospheres at 500 degrees C. Subsequently, the preparation of Au/Co3O4 composites was attained by Radio Frequency-Sputtering of gold onto the previous Co3O4 nanodeposits. Important data on the system structure, morphology and chemical composition were obtained by the combined use of complementary techniques, namely Glancing Incidence X-ray Diffraction, Field Emission-Scanning Electron Microscopy, Atomic Force Microscopy, Energy Dispersive X-ray Spectroscopy, X-ray Photoelectron Spectroscopy and Secondary Ion Mass Spectrometry. Finally, the gas sensing properties of the synthesized systems were probed in the detection of ethanol and hydrogen. The obtained results revealed significant responses already at moderate temperatures, which could be further enhanced by Co3O4 functionalization with Au nanoparticles.
引用
收藏
页码:8054 / 8061
页数:8
相关论文
共 36 条
[1]   Influences of ball-milling time on gas-sensing properties Of Co3O4-SnO2 composites [J].
Abe, S ;
Choi, US ;
Shimanoe, K ;
Yamazoe, N .
SENSORS AND ACTUATORS B-CHEMICAL, 2005, 107 (02) :516-522
[2]   Humidity-sensitive optical absorption of Co3O4 film [J].
Ando, M ;
Kobayashi, T ;
Haruta, M .
SENSORS AND ACTUATORS B-CHEMICAL, 1996, 32 (02) :157-160
[3]   Optical recognition of CO and H-2 by use of gas-sensitive Au-Co3O4 composite films [J].
Ando, M ;
Kobayashi, T ;
Iijima, S ;
Haruta, M .
JOURNAL OF MATERIALS CHEMISTRY, 1997, 7 (09) :1779-1783
[4]   Combined effects of small gold particles on the optical gas sensing by transition metal oxide films [J].
Ando, M ;
Kobayashi, T ;
Haruta, M .
CATALYSIS TODAY, 1997, 36 (01) :135-141
[5]  
[Anonymous], 1995, Handbook of X-ray Photoelectron Spectroscopy. A Reference Book of Standard Spectra for Identification and Interpretation of XPS Data
[6]   Sol-Gel and CVD Co3O4 Thin Films Characterized by XPS [J].
Armelao, Lidia ;
Barreca, Davide ;
Gross, Silvia ;
Tondello, Eugenio .
Surface Science Spectra, 2001, 8 (01) :14-23
[7]   A Cobalt(II) Hexafluoroacetylacetonate Ethylenediamine Complex As a CVD Molecular Source of Cobalt Oxide Nanostructures [J].
Bandoli, Giuliano ;
Barreca, Davide ;
Gasparotto, Alberto ;
Maccato, Chiara ;
Seraglia, Roberta ;
Tondello, Eugenio ;
Devi, Anjana ;
Fischer, Roland A. ;
Winter, Manuela .
INORGANIC CHEMISTRY, 2009, 48 (01) :82-89
[8]   CVD of lanthanum oxyfluoride-based thin films from a lanthanum β-diketonate diglyme precursor [J].
Barreca, D ;
Gasparotto, A ;
Maragno, C ;
Tondello, E ;
Bontempi, E ;
Depero, LE ;
Sada, C .
CHEMICAL VAPOR DEPOSITION, 2005, 11 (10) :426-432
[9]   CVD of nanophasic (Zn,Cd)S thin films: From multi-layers to solid solutions [J].
Barreca, D ;
Gasparotto, A ;
Maragno, C ;
Tondello, E ;
Sada, C .
CHEMICAL VAPOR DEPOSITION, 2004, 10 (04) :229-236
[10]   Chemical vapor deposition of copper oxide films and entangled quasi-1D nanoarchitectures as innovative gas sensors [J].
Barreca, D. ;
Comini, E. ;
Gasparotto, A. ;
Maccato, C. ;
Sada, C. ;
Sberveglieri, G. ;
Tondello, E. .
SENSORS AND ACTUATORS B-CHEMICAL, 2009, 141 (01) :270-275