Application of CoCrMnO4 spinel Nanoparticles as a photocatalyst for degradation of organic dyes under visible light

Spinel is a cubic structure with the public formula AB2O4, that A and B are cations settled in the tetrahedral and octahedral positions, respectively. therefore, a spinel has 56 atoms in any one cell. The dispensation of ions in A and B sites are subject to the ion equilibrium [1]. Materials and it Nanotechnology is an interdisciplinary knowledge, it is the interdisciplinary, including toxicology, medical, physics, chemistry, biology, mechanics, engineering, and recently environment [2]. in the last decade, environmental pollution has enhancement more and more public worry. for example, wastewater including dyes arriving from paper, textiles, plastic and leather industries is usually high in organic compounds and color [3]. This pollutant agent create important environmental problems. So, providing effective and efficient method for their removal from wastewater is necessary. Photocatalysis is one of this efficient approach to remove the dyes from wastewater [4]. Among the pollutant agent, we can point to organic dyes from industrial processes and textile as one of the main polluting water sources and create an important environmental crisis. Photocatalysis is considered as one of the important and efficient approaches to dismiss the dyes in wastewater [5]. In this paper a novel and inexpensive route for the preparation of spinel CoCrMnO4 nanoparticles is proposed and Congo red was used as model dye. The obtained nanoparticles were then identified using different analytical techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and field emission scanning electron microscopy (FESEM). The X-ray powder diffraction (XRD) confirmed the formation of cubic spinel phase CoCrMnO4. The photocatalytic activity of CoCrMnO4 nanoparticles were studied by performing the decomposition of Congo red dye under visible light irradiation. The effects of process parameters like, catalyst dosage, initial dye concentration, and visible light irradiation on dye degradation have been investigated.