Open AccessFabrication of Magnetic Nanoparticles Integrated Carbon Matrix from Chrysopogon zizanioides Roots: Strong Dye Adsorption and Persulphate Assisted Photodegradation
Author(s) -
A. Archana,
A. Edwin Vasu
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2022.23506
Subject(s) - chemistry , rhodamine b , adsorption , methylene blue , photodegradation , activated carbon , carbonization , nuclear chemistry , photocatalysis , inorganic chemistry , desorption , magnetic nanoparticles , nanoparticle , catalysis , organic chemistry , chemical engineering , engineering
Activated carbon with magnetic nanoparticles was prepared from the roots of Chrysopogon zizanioidesby impregnating the biomass with Fe3+ followed by carbonization in a muffle furnace. To assist thecarbonization process, Zn2+ ions were also taken along with ferric ions during impregnation. The pHZPC,density of surface functional groups, surface acidity constants and advanced characterizations like FT-IR,N2 adsorption-desorption isotherms, SEM with EDAX, DLS, XRD and VSM analysis were carriedout. The adsorption and natural sunlight induced photooxidation of two cationic dyes, namely, methyleneblue and rhodamine B in presence of potassium persulphate were studied by varying parameters liketime, dye concentration, pH of the dye solution, amount of magnetic activated carbon and concentrationof persulphate ions. The adsorption capacities of methylene blue and rhodamine B were found to be5.97 and 0.96 mg/g, respectively. Photocatalytic oxidation of the dyes was very rapid in the presenceof persulphate with the observed rate constants being 5.3 × 10–3 min–1 for methylene blue and 13.0 ×10–3 min–1 for rhodamine B. The magnetic activated carbon is found to be effective even after fivesuccessive degradation experiments.