Abstract
Spinel-type cobalt oxide (Co3O4) nanoparticles have been easily prepared through a simple thermal decomposition route at low temperature (175°C) using carbonatotetra(ammine)cobalt(III) nitrate complex, [Co(NH3)4CO3]NO3·H2O, as a new precursor. The structure and morphology of as-prepared Co3O4 nanoparticles were characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), UV–vis spectroscopy, Brunauer-Emmett-Teller specific surface area measurement and magnetic measurements, and thermogravimetry/differential thermal analysis. The FT-IR, XRD, and EDS results indicated that the product was highly pure well-crystallized cubic phase of Co3O4. The TEM images showed that the product powder consisted of dispersive quasi-spherical particles with a narrow size distribution ranged from 6 to 16 nm and an average size around 11 nm. The magnetic measurements confirmed that the Co3O4 nanoparticles show a little ferromagnetic behavior which could be attributed to the uncompensated surface spins and/or finite size effects. The ferromagnetic order of the Co3O4 nanoparticles is raised with increasing the decomposition temperature. Using the present method, Co3O4 nanoparticles can be produced without the need of expensive organic solvents and complicated equipments.
Highlights
Due to the unique properties and characteristics of inorganic–organic nanohybrid materials in various industries, there is a great desire to prepare and study their applications
Temperature was evaluated in the range of 150–200 °C and the reaction time was evaluated in the range of 2 to 6 days and we concluded that suitable nanocrystals are formed at the temperature of 180 °C in 4 days
The results indicate that the ratio of Ni/Mo weight percentages is increased by raising the pH value
Summary
Due to the unique properties and characteristics of inorganic–organic nanohybrid materials in various industries, there is a great desire to prepare and study their applications. The engineering of nanocrystals of inorganic–organic hybrid materials is focused on the two aspects in terms of their structural flexibility [6] and, secondly, their application as a catalyst, as gas storage, as ion sieve, in photochemistry and in electromagnetism [7,8,9,10,11,12,13,14]. Inorganic–organic hybrid materials composed of Mo and PPDA have been studied mostly in terms of crystal structure [32,33,34], but preparation of their nanoparticles has not been reported. The hydrothermal method has been used for the synthesis of NiSO4 and MoO3 nanostructure crystals using PPDA spacers. The effect of factors influencing the hydrothermal process and pH values on the morphology of nanocrystals as well as their luminescence properties has been discussed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
