Fabricating zero-valent Cu NPs on Oxidized Alginate- Chitosan ZnO polymer biomatrix for 4-nitrophenol reduction and dyes discoloration

Abstract

types of dyes and phenolic compounds are being extensively used in industries. The frequent use of these colors contaminates water. Humans and other living things can get sick from this tainted water. Therefore, treating the contaminated water is important. The biodegradation process can be used to remove these colors from water, although it isn't very effective. The use of metallic nanoparticles for dye degradation offers the environment some very promising advantages. In this thesis alginate was oxidized to aldehyde and then reacted with chitosan to make the imine bond later ZnO nanoparticles were added .The matrix serves as supporting material for the synthesis of Cu nanoparticles . To create zero valent copper nanoparticles, copper ions from an aqueous solution were adsorbed on films and then treated with sodium borohydride solution. A sudden change in color shows the synthesis of nanoparticles, which XRD analysis also verified.Synthesized films of OAlg-CS/ZnO were characterized using FTIR. Oxidized alginate and its polymer nanocomposite showed exceptional degradation efficiency i.e more than 80% in all the cases . Reason behind is functionalization provides more adsorption sites for metal ions ultimately leads to the formation of more nanoparticles.The synthesized films also showed exceptional anti-bacterial activity against less resistant strain of s.aureus.