Synthesis of carbon dots@Fe3O4 and their photocatalytic degradation properties to hexaconazole

Abstract

The CD@Fe₃O₄ photocatalysts were synthesized via hydrothermal synthesis method. The CD@Fe₃O₄ particles were synthesized using Fe₃O₄ as the core and using citric acid and ethylenediamine as a raw material, which were heated to 200 °C for 4 h. The synthesized fluorescent CD@Fe₃O₄ was characterized by HR-TEM, IR and fluorescence spectrophotometer. The HR-TEM results showed CD and Fe₃O₄ nanoparticles were uniform, mono-dispersed sphere or hemisphere particles with an average size of approximately 3 nm, and particle size of CD@Fe₃O₄ were mainly in range of 20-30 nm. XRD results showed the nanoparticles mainly belonged to Fe₃O₄ and CD@Fe₃O₄, which made recycling our photocatalysts possible due to the magnetic performance. On daylight lamp, the half-life of hexaconazole in CD@Fe₃O₄ photocatalysts was about 4 days, and it is lower than half-life (over 100 days) of hexaconazole without CD@Fe₃O₄ photocatalysts.

Keywords: CD@Fe(3)O(4); Hexaconazole; Photocatalytic degradation.