Catalytic activity of Ni complexed aminoclay towards the reduction of Cr(V), p-nitrophenol and fluorescein dye

Abstract

A green-colored Ni-complexed aminoclay (AC) was synthesized and its size and crystalline nature were confirmed by HRTEM images and XRD, respectively. The AC–Ni system was used as a catalyst towards the reduction of environmental pollutants like Cr(VI), fluorescein (Fluor) and nitrophenol (NiP) individually and also their mixture. The catalytic reduction of Cr(VI) was elaborately studied under different experimental conditions. The thermodynamic parameters were determined. The AC–Ni system exhibited lower energy of activation (Ea) value. The apparent rate constant of individual components and their mixture was determined, analyzed and compared with the literature reports. The pollutants present in the mixture exhibited the lower kapp value due to the complex formation.