Carboxymethyl Cellouse Stabilized Cobalt Sulfide Nanoparticles: Preparation, Characterization and Application.

We have developed a biological macromolecule stabilized method for the preparation of cobalt sulfide nanoparticles using carboxymethyl cellouse (CMC) as a stabilizing agent. We investigated the formation of cobalt sulfide nanoparticles as a function of different amounts of CMC. At 0.05% w/v amount of CMC, the high percentage of cube shaped cobalt sulfide nanoparticles is obtained. The samples obtained from 0.01% w/v and 0.1% w/v amounts of CMC shows random shaped cobalt sulfide nanoparticles and aggregated cobalt sulfide nanostructures, respectively. The obtained cobalt sulfide nanoparticles are stabilized through the interactions of hydroxyl (–OH) and carboxylate (–COO–) functional groups in CMC. The CMC encapsulated cobalt sulfide nanoparticles were shown to have good catalytic activity for chemical reduction of p-nitroaniline in the presence of sodium borohydride. [ABSTRACT FROM AUTHOR]