Co3O4-ZnO Nanocomposites: from Plasma Synthesis to Gas Sensing Applications

Year: 2012

Authors: Bekermann D.; Gasparotto A.; Barreca D.; Maccato C.; Comini E.; Sada C.; Sberveglieri G.; Devi D.; Fischer R.A.

Autors Affiliation: 1,2,4: Department of Chemistry, Padova University and INSTM, 35131 Padova, Italy / 3: CNR-ISTM and INSTM, Department of Chemistry, Padova University, 35131 Padova, Italy / 5,7: CNR-IDASC, SENSOR Lab, Department of Chemistry and Physics, Brescia University, 25133 Brescia, Italy / 6: Department of Physics and CNISM, Padova University, 35131 Padova, Italy / 8,9: Inorganic Materials Chemistry Group, Lehrstuhl fur Anorganische Chemie II, Ruhr-University Bochum, 44780 Bochum, Germany

Abstract: Herein, we describe the design, fabrication and gas sensing tests of p-Co 3O 4/n-ZnO nanocomposites. Specifically, arrays of ?001? oriented ZnO nanoparticles were grown on alumina substrates by plasma enhanced-chemical vapor deposition (PECVD) and used as templates for the subsequent PECVD of Co 3O 4 nanograins. Structural, morphological and compositional analyses evidenced the successful formation of pure and high-area nanocomposites with a tailored overdispersion of Co 3O 4 particles on ZnO and an intimate contact between the two oxides. Preliminary functional tests for the detection of flammable/toxic analytes (CH 3COCH 3, CH 3CH 2OH, NO 2) indicated promising sensing responses and the possibility of discriminating between reducing and oxidizing species as a function of the operating temperature.

Journal/Review: ACS APPLIED MATERIALS & INTERFACES

Volume: 4 (2)      Pages from: 928  to: 934

KeyWords: Co3O4/ZnO, nanocomposites, plasma enhanced-chemical vapor deposition, gas sensors
DOI: 10.1021/am201591w

ImpactFactor: 5.008
Citations: 136
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