Abstract
In this project, we successfully prepared Cr2O3-SiO2/graphene oxide (GO) or multi-walled carbon nanotubes (MWCNTs) by microwave/ultrasonic/hydrothermally method, aiming for the photo-degradation capture of Parathion compound from aqueous solutions. For the removal of Parathion, the photocatalysis properties is different and the apparent degradation amount sequence is SiO2 < Cr2O3-SiO2 < Cr2O3-SiO2/MWCNTs < Cr2O3-SiO2/GO nano-catalyst. Compared with bare SiO2 particles, Cr2O3-SiO2, and Cr2O3-SiO2/MWCNTs, the prepared Cr2O3-SiO2/GO exhibits the excellent photocatalytic performance for the UV light degradation of Parathion compound. The maximum photo-degradation of Parathion by Cr2O3-SiO2/GO was carried out after 60 min of contact time under UV light. The response surface method with box-behnken design was used to optimization of Parathion photo-degradation. Moreover, the good stability and convenient recycling of the prepared Cr2O3-SiO2/MWCNTs and Cr2O3-SiO2/GO nanocomposites further make it have excellent application aim in removal of organic pollution.
•The catalyst were synthesized by microwave/ultrasonic/hydrothermally method.•Photocatalyst was developed for degradation of Parathion.•The photo-degradation activity of Cr2O3-SiO2/GO was higher than other catalysts.•The Cr2O3-SiO2/GO photocatalyst has great photo stability.•A Box-Behnken model of degradation and optimization was presented based on RSM.