Synthesis of star‐shaped CuO nanoparticles supported on magnetic functionalized graphene: Catalytic and antibacterial activity. Issue 11 (2nd June 2020)

• Record Type: Journal Article
• Authors: Zarei, Mohammad; Seyedi, Neda; Maghsoudi, Shahab; Shahabi Nejad, Mohaddeseh; Sheibani, Hassan
• Is Part Of: Journal of the Chinese Chemical Society. Volume 67:Issue 11(2020)
• Page Start: 1992
• Page End: 2003
• Publication Date: 2020-06-02
• Subjects: functionalized graphene -- reduction of organic dyes and antibacterial activity -- star‐shaped CuO nanoparticles; Chemistry -- Periodicals; Electronic journals; 540.5
• DOI: 10.1002/jccs.202000097
• Languages: English
• ISSNs: 0009-4536

Abstract

Abstract: In this study, graphene oxide was modified during consecutive functionalization steps with 1, 4‐diphenylamine, cyanuric chloride, and ethylenediamine. Then, star‐shaped CuO nanoparticles were synthesized on modified graphene oxide using the seed‐mediated growth method in which nucleation, growth stages, and reduction of graphene oxide to graphene occurred simultaneously. After ensuring successful synthesis of CuO nanoparticles and to facilitate recycling, a magnetization process was utilized by adding iron oxide nanoparticles. This nanocomposite was characterized by transmission electron microscopy, X‐ray powder diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. The prepared heterogeneous catalyst was investigated for the reduction of organic dyes in the presence of NaBH4 as a reducing reagent. The kinetic data obtained for the reduction of methyl orange (MO), methylene blue (MB), 4‐nitrophenol (4‐NP), and rhodamine 6G (Rh6G) were fitted to first‐order rate equations, and the calculated rate constants for the reduction of MO, MB, 4‐NP and Rh6G were as follows: −0.091, −0.071, −0.045, and 0.040, respectively. As star‐shaped CuO nanoparticles showed a higher antibacterial effect compared to spherical‐shaped CuO nanoparticles, the antibacterial activity of star‐shaped CuO nanoparticles immobilized on magnetic functionalized graphene was evaluated against Gram‐positive and Gram‐negative bacteria through an agar well diffusion assay and demonstrated more antibacterial activity against gram‐positive bacteria. Abstract : Graphene oxide was modified during consecutive functionalization steps. Then, star‐shaped CuO nanoparticles were synthesized on modified graphene oxide. A magnetization process was utilized by adding iron oxide nanoparticles. Its catalytic activity was investigated for the reduction of organic dyes in the presence of NaBH4 as a reducing reagent. The antibacterial activity of this catalyst was evaluated against Gram‐positive and Gram‐negative bacteria.