Topic of Research Seminar: Synthesis of oxidized carboxymethyl cellulose-chitosan and its composite films with SiC and SiC@SiO2 nanoparticles for methylene blue dye adsorption
Abstract: The cationic methylene blue (MB) dye sequestration was studied by using oxidized carboxymethyl cellulose chitosan (OCMC-CS) and its composite films with silicon carbide (OCMC-CS-SiC), and silica-coated SiC nanoparticles (OCMC-CS-SiC@SiO2). The resulting composite films were characterized through various analytical techniques, including Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and Scanning electron microscopy (SEM). The dye adsorption properties of the synthesized composite films were comprehensively investigated in batch experiments and the effect of parameters such as contact time, initial dye concentration, catalyst dosages, temperature, and pH were systematically evaluated. The results indicated that the film’s adsorption efficiency was increased by increasing the contact time, catalyst amount, and temperature, and with a decreased initial concentration of dye solution. The adsorption efficiency was highest at neutral pH. The experimental results demonstrated that OCMC-CS films have high dye adsorption capabilities as compared to OCMC-CS-SiC, and OCMC-CS-SiC@SiO2. Additionally, the desorption investigation suggested that the adsorbents are successfully regenerated. Overall, this study contributes to the development of sustainable and effective adsorbent materials for dye removal applications. These films present a promising and environmentally friendly approach to mitigate dye pollution from aqueous systems
Subject Field of Topic: Chemistry
Name of Speaker: Ms. Sadia Mehmood
Professorial Rank of Speaker: PhD Scholar (Chemistry Dpt.), School of Natural Sciences (SNS) – NUST
Email of Speaker: [email protected]
Affiliation of Speaker: School of Natural Sciences (SNS), NUST
Date and Venue: (Thursday) 14 November 2024, 1430 hrs, at CR #205 (New SNS Building), School of Natural Sciences (SNS), NUST Islamabad