Title of article
Highly selective ammonia sensors based on Co1−xNixFe2O4/multi-walled carbon nanotubes nanocomposites
Author/Authors
Tang، نويسنده , , Ya and Zhang، نويسنده , , Qinghong and Li، نويسنده , , Yaogang and Wang، نويسنده , , Hongzhi، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
6
From page
229
To page
234
Abstract
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.
Keywords
Nanostructure , chemical synthesis , Magnetic properties , Gas-sensing properties
Journal title
Sensors and Actuators B: Chemical
Serial Year
2012
Journal title
Sensors and Actuators B: Chemical
Record number
1440726
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