Abstract
Nickel ferrite/multi-walled carbon nanotubes (NiFe2O4/MWCNTs) composite has been rapidly synthesized via microwave irradiation technique. The structural properties of the product was investigated by X-ray diffraction (XRD), N2 adsorption/desorption isotherms, thermogravimetric analysis (TGA), Raman spectroscopy and, scanning electron microscopy (SEM). Catalytic behavior of the composite material on the advanced photo-Fenton degradation of Amaranth dye was evaluated. The synthesis conditions employed on the microwave system were: temperature (235 °C), power (500 W), pressure (600 psi) and irradiation time (30 min) Characterization results showed the formation of hybrid material, containing a predominantly microporous structure, with surface area and total pore volume of 54 m2g-1 and 0.2249 cm3 g-1, respectively. The composite exhibited higher catalytic activity compared to the pure NiFe2O4, reaching 100% of decolorization at 60 min of reaction, which can be attributed to a synergism between NiFe2O4 and MWCNTs. Therefore, NiFe2 O4/MWCNTs composite can be used as a promising photo-Fenton catalyst to degrade Amaranth dye from aqueous solutions
Highlights
Advanced oxidation processes (AOPs) are alternative emerging techniques for the degradation of organic pollutants in wastewater[1,2,3,4,5,6]
A modified procedure for the preparation of NiFe2O4/ multi-walled carbon nanotubes (MWCNTs) composite was employed in this work, which was based on a previously reported work[13], where a hydrothermal conventional method has been employed for the synthesis process[13]
0.40 g of MWCNTs was dispersed in 600 mL of ethyl alcohol
Summary
Advanced oxidation processes (AOPs) are alternative emerging techniques for the degradation of organic pollutants in wastewater[1,2,3,4,5,6]. In the presence of a light source, known as photo-Fenton reaction, the pollutant degradation rate substantially increases[10,11]. A simplified mechanism for the heterogeneous photo-Fenton degradation of organic pollutant under light irradiation can be depicted as follows (Equations 1-3): / FeIII + H2 O2.
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