期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 169, 期 -, 页码 229-234出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.04.073
关键词
Nanostructure; Chemical synthesis; Magnetic properties; Gas-sensing properties
资金
- Shanghai Municipal Education Commission [07SG37]
- Natural Science Foundation of China [51072034]
- Shanghai Leading Academic Discipline Project [B603]
- Cultivation Fund of the Key Scientific and Technical Innovation Project [708039]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Program of Introducing Talents of Discipline to Universities [111-2-04]
Co1-xNixFe2O4/multi-walled carbon nanotubes (MWCNTs) nanocomposites (x = 0.2, 0.4, 0.5, 0.6, 0.8) were synthesized via an in situ solvothermal method using ethylene glycol as solvent. X-ray diffraction analysis result confirmed that MWCNTs and high purity Co1-xNixFe2O4 nanocrystallites coexisted in the nanocomposites. Transmission electron microscopy revealed that 50-60 nm Co1-xNixFe2O4 nanoparticles (NPs) were densely clustered along the length of the MWCNTs. Substitution of the Co2+ by Ni2+ at octahedral sites was verified by vibrating sample magnetometry. Co1-xNixFe2O4/MWCNTs nanocomposites have a high selectivity for ammonia vapor, with a sensitivity greater than that observed for either bare MWCNTs or Co1-xNixFe2O4 NPs. (C) 2012 Elsevier B.V. All rights reserved.
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