A novel sensor for the detection of n-butanol based on CoMn2O4 nanoparticles

다국어 초록 (Multilingual Abstract)

In this paper, we studied the alcohol-sensing properties of CoMn 2 O 4 nanoparticles for the fi rst time. The CoMn 2 O 4nanoparticles were prepared via a simple microwave-assisted colloidal method using cobalt nitrate, manganese nitrate,dioctyl sulfosuccinate sodium salt, and ethylene glycol as a solvent. Various techniques were used to characterize the structural,morphological, and optical properties of CoMn 2 O 4 . The crystal structure of CoMn 2 O 4 was found after calcinationat a temperature of 400 °C. The Raman spectrum showed seven vibrational bands, while the optical absorption spectrumshowed three bands, confi rming the spinel CoMn 2 O 4 . Morphological analysis revealed that the porous microstructure ofCoMn 2 O 4 was composed of nanoparticles with a size distribution of 16 to 58 nm. Gas sensors were fabricated with theCoMn 2 O 4 powders calcined at 400 °C using the brush-coating method, and experimental results showed that CoMn 2 O 4nanoparticles were more sensitive to n -butanol than isopropanol and ethanol at an operating temperature of 185 °C. TheCoMn 2 O 4 sensor showed a response of 6.6 at 50 ppm n -butanol with good stability, reproducibility, and repeatability.
The present article provides a new sensing material that could be used as an n -butanol sensor with signifi cant benefi tsfor human health.