Bui Thi Phuong Quynh Kim, Sang Hoon Doan Thi Que Minh Nguyen Thi Mong Diep Pham Van Thinh Nguyen Thi Thuong 2024-01-20T01:03:17Z 2024-01-20T01:03:17Z 2021-09-05 2017-07 1944-3994 https://pubs.kist.re.kr/handle/201004/122558 This study focused on the fabrication, characterization of magnetic NiFe2O4-decorated exfoliated graphite (MEG) as well as its potential application as a low-cost, flexible and efficient adsorbent to remove different kinds of cationic and anionic dyes from aqueous solution. The exfoliated graphite was first fabricated using highly efficient microwave-assisted exfoliation technique and the ferrite magnetic component (NiFe2O4) was then introduced to the graphitic structure by sol-gel process. The materials were characterized using relevant analytical techniques such as scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N-2 adsorption measurement and vibrating sample magnetometry. The adsorption behavior of widely used ionic dyes including methylene blue (MB), crystal violet (CV), methyl orange (MO) and congo red (CR) was investigated under effects of exfoliation degree, NiFe2O4 loading on EG structure, preparation temperature and adsorption conditions (i.e. pH and dye concentration). The adsorption mechanism was discussed taking into account the electrostatic force, hydrogen bonding, pi-pi interaction between delocalized pi electrons of the basal planes and free electrons of aromatic rings and multiple bonds in dye molecules. English DESALINATION PUBL HEAVY-METAL IONS GRAPHENE OXIDE METHYLENE-BLUE CONGO RED REACTIVE DYE AZO-DYE SILICA ORANGE THERMODYNAMICS NANOPARTICLES Magnetic NiFe2O4 decorated-exfoliated graphite for adsorptive removal of anionic dyes and cationic dyes from aqueous solution Article 10.5004/dwt.2017.20936 1 DESALINATION AND WATER TREATMENT, v.82, pp.101 - 113 DESALINATION AND WATER TREATMENT 82 101 113 scie scopus 000410814600011 2-s2.0-85029081734 Engineering, Chemical Water Resources Engineering Water Resources Article HEAVY-METAL IONS GRAPHENE OXIDE METHYLENE-BLUE CONGO RED REACTIVE DYE AZO-DYE SILICA ORANGE THERMODYNAMICS NANOPARTICLES Ionic dyes Exfoliated graphite Adsorption Magnetic adsorbent Nickel ferrite Wastewater treatment