Magnetic Recyclable Cu/Znfe2o4 for Catalytic Reduction of Nitroarenes And C-N Bond Formation Reactions

A magnetic recyclable Cu/ZnFe2O4 composite material was successfully prepared with cheap and easy-to-obtain raw materials. This obtained copper composite material could be employed as efficient catalyst for both degradation of aromatic nitro compounds and C-N bond formation reactions without extra ligands. The aromatic nitro compounds were reduced within 2 min with low catalyst dosage. And high catalytic activity, broad substrate scope and low loading were achieved for Ullmann-type C-N bond formation reaction. The morphology of Cu/ZnFe2O4 was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Energy disperse spectroscopy (EDS), Transmission electronic microscopy (TEM) and Scanning electron microscopy (SEM). In addition, this environmentally friendly heterogeneous catalyst could simply be recovered via magnetic decantation and used again for six cycles with no considerable loss in activity. This developed magnetic recyclable Cu/ZnFe2O4 composite had the characteristics of easy availability, high catalytic performance, good reusability good stability and magnetic recovery properties.

GREEN REDUCTION OF SOME AROMATIC NITRO COMPOUNDS BY IMMOBILIZED BAKER’S YEAST

Green chemical reduction of selected aromatic nitro compounds like o-nitrobenzoic acid, m-nitrobenzoic acid and p-nitrobenzoic acid will be done by involving microbial transformation. In microbial transformation Baker’s Yeast (Saccharomyces cerevisiae) is used in immobilized form. Utilisation of baker’s yeast for reduction of nitro compounds is cost effective and environmental friendly .The reduction products will be isolated and purified by chromatographic techniques and characterized on the basis of spectral analysis viz. IR, NMR spectral data. KEYWORDS: Baker’s Yeast, Chromatographic technique, Green reduction, Microbial transformation, Spectroscopic technique.

A direct Z-scheme mechanism for selective hydrogenation of aromatic nitro compounds over a hybrid photocatalyst composed of ZnIn2S4 and WO3 nanorods

A direct Z-scheme mechanism photocatalyst constructed from ZnIn2S4 and WO3 is a versatile photoredox platform for selective hydrogenation and environmental remediation.

Novel mesoporous Ag@SiO2 nanospheres as a heterogeneous catalyst with superior catalytic performance for hydrogenation of aromatic nitro compounds

Mesoporous core–shell structure Ag@SiO2 nanospheres are constructed to prevent Ag nanoparticles from aggregation during the hydrogenation reaction.