Investigation of magnetic and electrochemical sensing properties of novel Ba1/3Mn1/3Co1/3Fe2O4 nanoparticles

• Main Authors: Osman, Nadir S. E, Thapliyal, Neeta, Moyo, Thomas, Karpoormath, Rajshekhar
• Format: Journal Article
• Language: English
• Published: 23.11.2015
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/c5nj01547b

Novel Ba 1/3 Mn 1/3 Co 1/3 Fe 2 O 4 nanoparticles were successfully synthesized using the glycol thermal route. The X-ray diffraction study confirmed a well defined spinel phase structure of the sample. The microstrain was investigated based on the Williamson-Hall plot. Crystallinity, shape and size of the nanoparticles were studied using high resolution transmission electron microscopy and high resolution scanning electron microscopy. Brunauer-Emmet-Teller measurement revealed that the sample has a high surface area of 116 m 2 g −1 . The Barrett-Joyner-Halenda test showed that the sample is mesoporous. The magnetization was found to increase from 66.5 ± 0.3 emu g −1 at 300 K to 84.4 ± 0.5 emu g −1 at 4 K. Furthermore, the electrochemical sensing properties of Ba 1/3 Mn 1/3 Co 1/3 Fe 2 O 4 nanoparticles were investigated using cyclic voltammetry. A glassy carbon electrode was modified using the synthesized Ba 1/3 Mn 1/3 Co 1/3 Fe 2 O 4 nanoparticles. The modified electrode demonstrated excellent electrocatalytic activity towards didanosine, an anti-HIV drug. A linear response to the drug concentration was obtained in the range from 0.001 to 5.0 μM with a detection limit of 1.0 nM. The electrode was highly stable, reproducible and was successfully used to determine trace amounts of didanosine in human urine samples. Novel Ba 1/3 Mn 1/3 Co 1/3 Fe 2 O 4 nanoparticles were successfully synthesized, characterized and investigated for their magnetic and electrochemical sensing properties.