Open AccessDecomposition of organic pollutant in waste water using magnetic catalyst nanocomposite
Author(s) -
H. Tju,
Ardiansyah Taufik,
M. Fauzian,
Rosari Saleh
Publication year - 2018
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1091/1/012011
Subject(s) - nanocomposite , materials science , wurtzite crystal structure , catalysis , aqueous solution , photocatalysis , chemical engineering , hydrothermal circulation , methylene blue , nanotechnology , zinc , organic chemistry , chemistry , metallurgy , engineering
In this study, magnetic recyclable catalyst Fe 3 O 4 /CuO/ZnO/nanographene platelets (Fe 3 O 4 /CuO/ZnO/NGP) and Fe 3 O 4 /CuO/TiO 2 /nanographene platelets (Fe 3 O 4 /CuO/TiO 2 /NGP) composites were synthesized by simple hydrothermal method. Methylene blue was used as a model of textile dye to evaluate their catalytic activities. A range of analytical techniques including X-ray diffraction, energy-dispersive X-ray spectroscopy and vibrating sample magnetometer were employed to reveal the crystal structure, composition and property of the nanocomposites. The catalytic performance was evaluated by degradation of methylene blue in aqueous solution under UV light and ultrasonic irradiation simultaneously. X-ray diffraction results revealed that cubic spinel Fe 3 O 4 , monoclinic CuO, hexagonal wurtzite ZnO and graphene platelets exist in Fe 3 O 4 /CuO/ZnO/NGP, while in Fe 3 O 4 /CuO/TiO 2 /NGP nanocomposites instead of hexagonal wurtzite ZnO, anatase TiO 2 is observed. These results confirmed that the nanocomposites were the desired materials. In addition, all samples exhibited ferromagnetic behavior at room temperature and could be rapidly separated from aqueous solution for repeated use under external magnetic field. From the degradation of methylene blue, it is found that the as-prepared nanocomposites exhibited excellent catalytic activity compared with nanocomposite synthesized without nanographene platelets. The nanocomposites still retain the 100% of the initial activity after it has been used four times repeatedly.