Bio-derived CuO nanocatalyst for oxidation of aldehyde: a greener approach

Abstract

Eco-friendly synthesis of hierarchical CuO nanoparticles using the peel ofMusa balbisianaand its application as a nanocatalyst in oxidation of aldehyde to the corresponding carboxylic acid is reported here.

Green Synthesis and Characterization of CuO Nanoparticles Derived from Papaya Peel Extract for the Photocatalytic Degradation of Palm Oil Mill Effluent (POME)

“…Figure 3b shows the O 1s XPS spectra of the sample and according to the O 1s peaks, the O 2in CuO was assigned to the lower energy peak at 528.77 eV while the higher energy peak at 530.52 eV indicated the O that adsorbed on the surface of the CuO NPs [28,30]. Hence, the XPS measurements excluded the presence of Cu 2 O and Cu(OH) 2 impurities in the green-synthesized CuO NPs as there would be no satellite peaks observed in Cu 2p 3/2 and Cu 2p 1/2 of Cu + [31,32]. The appearance of satellite peaks proved to be the presence of the fingerprint of the d 9 Cu 2+ species that were caused by the relaxation phenomenon of the strong configuration interaction in the final state [28].…”

Bio-derived ZnO nanoflower: a highly efficient catalyst for the synthesis of chalcone derivatives

“…A similar result was observed in other metal oxides with the same precursors. 12,13 In order to understand the role of ions like K + , CO 3 2À etc. we have performed an experiment using commercially available reagents.…”

“…It is widely used to produce soaps and detergents for washing clothes and shampooing hair. 12,13 In the present investigation we synthesized ZnO nanoparticles with a green and low cost method using the peel of Musa balbisiana. This procedure is environmentally benign for the production of well characterized nanoparticles without the use of harsh, toxic and expensive chemicals.…”

Bio-carbon-layered CuO-catalyzed decarboxylative alkenylation of cyclic ethers

“…In this regard, biogenic NPs have emerged as an alternative to the conventionally derived ones. 11,12 The use of carbonaceous material supports such as activated carbon, 13 carbon nanotubes (CNTs), 14 reduced graphene oxides (rGO), 15 carbon quantum dots, 16 graphene, 17 cellulose, 18 and mesoporous carbon vesicles (MCVs) 19 can enhance the catalytic activity of copper (Cu) NPs. The support material increases the stability of Cu NPs by altering their sensitivity to oxygen, water, and other chemical entities present in the reaction mixture.…”