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.

Automated summary

We have developed a method for preparing cobalt sulfide nanoparticles using carboxymethyl cellulose (CMC) as a stabilizing agent. The shape and aggregation of the nanoparticles can be controlled by varying the concentration of CMC. The stabilized nanoparticles exhibit good catalytic activity for chemical reduction.