(59h) Synthesis of Magnetic Nanoparticles Anchored on Carbon Nano-Matrix for the Efficient Adsorptive Removal of Crystal Violet from Aqueous Solution

In this study, we present a substrate-free synthesis method for generating Cu-carbon nanofibers (Cu-CNFs) using Cu-tartrate. The optimization of the reduction temperature of Cu-tartrate through temperature programmed reduction (TPR) analysis is identified as a critical factor for the successful growth of Cu-CNFs. Additionally, magnetite (Fe3O4) nanoparticles (NPs) are incorporated onto Cu-CNFs using the wet-impregnation technique. Various analytical and spectroscopic techniques are employed to evaluate the physico-chemical properties of the resulting materials.

The material is subjected to testing for its adsorption efficacy towards crystal violet dye. A notable adsorption capacity (260 ± 5 mg/g at a pH value of 11, as measured by the Langmuir model) is observed, attributed to the combined effects of a negative surface charge, hydrophilic characteristics, and a high surface area of the material. In a dual role, Fe3O4 NPs facilitate the adsorption of crystal violet onto the adsorbent and efficiently separate the adsorbent from the aqueous mixture using an external magnet. The synthesized material exhibits potential for the adsorptive removal of other cationic dyes from wastewater.