Synthesis of magnetic iron oxide/graphene oxide nanocomposites for removal of cadmium ions from water*Report presented at 9th International Workshop on Advanced Materials Science and Nanotechnology (IWAMSN2018), 7-11 November 2018, Ninh Binh City, Vietnam. (16th May 2019)

• Record Type: Journal Article
• Authors: Thy, Lu Thi Mong; Thuong, Nguyen Hoai; Tu, Tran Hoang; Nam, Hoang Minh; Hieu, Nguyen Huu; Phong, Mai Thanh
• Is Part Of: Advances in natural sciences. Volume 10:Number 2(2019)
• Publication Date: 2019-05-16
• Subjects: magnetic iron oxide -- graphene oxide -- nanocomposite -- adsorption -- cadmium; 2.03 -- 4.00 -- 4.02 -- 5.11 -- 5.15; Nanotechnology -- Periodicals; Nanoscience -- Periodicals; 620.5
• DOI: 10.1088/2043-6254/ab1b79
• Languages: English
• ISSNs: 2043-6254

Abstract

Abstract: In this study, magnetic iron oxide/graphene oxide (Fe3 O4 /GO) nanocomposites were developed for removal of cadmium ions (Cd 2+ ) from water, which could be effectively separated from the solution owing to its superparamagnetic property. The Fe3 O4 /GO nanocomposites were fabricated by co-precipitation method with different precursor ratios of 8:1, 4:1, 2:1, and 1:1. It was found that the suitable ratio of Fe3 O4 /GO for Cd 2+ ions adsorption was 4:1 (FG2). The effects of contact time, pH, and metal initial concentration on the adsorption properties of FG2 for Cd 2+ in water were investigated. The adsorption data of FG2 followed pseudo-second-order kinetic and Langmuir isotherm models with the maximum adsorption capacity of 52.083 mg g −1 at pH 8. The structure and morphology of FG2 were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) specific surface area, and vibrating sample magnetometry (VSM). TEM images of FG2 presented the Fe3 O4 nanoparticles in the size range of 10–15 nm decorated on GO nanosheets. The BET specific surface area of FG2 was observed to be 180.84 m 2 g −1 . VSM result of FG2 was 41.13 emu g −1 . Accordingly, FG2 could be considered as a highly efficient adsorbent for removing Cd 2+ from water.