Synthesis of Co nanoparticles supported on cellulose: a magnetically recoverable and cost effective catalyst for the degradation of congo red and methyl orange

Dyes and pigments are important organic industrial raw materials which are widely used in textile, cosmetic, printing, drug and food-processing industries.1 Most of the dyes are toxic to aquatic organisms. Thus, there is a drastic need to develop eco-friendly treatment methods for the elimination of these pollutants from the environment, because of their toxicity and carcinogenic properties.2 Although conventional chemical and physical techniques such as precipitation, adsorption, and ozonation have been employed for the decolorization of dye effluents, they possess inherent limitations such as high cost, formation of hazardous by-products, and intensive energy requirements.3 In recent years, metal nanoparticles (MNPs) have been used for the degradation of organic dyes due to their interesting structure, large specific surface area, strong electron transfer abilities and high catalytic activities.1 Among various metal nanoparticles, cobalt nanoparticles have attracted particular attention because of their excellent electrical, magnetic and catalytic properties.4 In the current work, we synthesis the magnetic cobalt nanoparticles supported on cellulose (Co NPs/Cellulose) (Scheme 1). The prepared nanocomposite was found to be highly efficient catalyst for the degradation of Congo red (CR) and Methyl orange (MO), with excess amounts of NaBH4 in water at room temperature. Furthermore, the nanocomposite could be easily separated from the reaction media by an external magnet and reused three times without significant loss of activity.

کلیدواژه ها:

Cellulose ، Degradation ، Metal nanoparticles ، Nanocomposite