Carboxymethyl cellulose nanocomposite beads as super-efficient catalyst for the catalytic reduction of organic and inorganic pollutants.

Carboxymethyl cellulose nanocomposite beads as super-efficient catalyst for the catalytic reduction of organic and inorganic pollutants. Int J Biol Macromol. 2020 Nov 18;: Authors: Maslamani N, Khan SB, Danish EY, Bakhsh EM, Zakeeruddin SM, Asiri AM Abstract Carboxymethyl cellulose/copper oxide-nickel oxide (CMC/CuO-NiO) nanocomposite beads were prepared by facile, simple and environmentally friendly method. Initially, CuO-NiO was prepared and applied for the catalytic reduction of 4-nitrophenol (4-NP). The results showed that CuO-NiO demonstrated high catalytic activity toward the reduction of 4-NP to 4-aminophenol (4-AP) with a rate constant of 2.97 × 10-2 s-1. Further, CuO-NiO were well-dispersed in the polymeric matrix of carboxymethyl cellulose to prepare CMC/CuO-NiO beads. CMC/CuO-NiO nanocomposite beads were also applied to catalyze the reduction of potassium ferrocyanide (K3Fe (CN)6), 4-NP, Congo red (CR) and eosin yellow (EY) in the presence of sodium borohydride. Experimental data indicated that CMC/CuO-NiO nanocomposite has higher catalytic activity within few seconds and high rate constant compared to CuO-NiO. The rate constant found to be 6.88 × 10-2, 6.27 × 10-2, 1.89 × 10-2 and 2.43 × 10-2 for K3Fe(CN)6, 4-NP, CR and EY, respectively, using 5 mg CMC/CuO-NiO beads. FE-SEM, EDX, FTER, XRD and XPS were used to characterize the nanocomposites. CMC/CuO-NiO beads catalytically reduced up to 95-99...
Source: International Journal of Biological Macromolecules - Category: Biochemistry Authors: Tags: Int J Biol Macromol Source Type: research