Synthesis and Optimization of TiO2/Graphene with Exposed {001} Facets Based on Response Surface Methodology and Evaluation of Enhanced Photocatalytic Activity

摘要

Response surface methodology (RSM) was employed to optimize the control parameters of TiO2/graphene with exposed { 001 } facets during synthesis,and its enhanced photocatalytic activities were evaluated in the photodegradation of toluene.Experimental results were in good agreement with the predicted results obtained using RSM with a correlation coefficient (R2) of 0.9345.When 22.06 mg of graphite oxide (GO) and 2.09 mL of hydrofluoric acid (HF) were added and a hydrothermal time of 28 h was used,a maximum efficiency in the degradation of toluene was achieved.X-ray diffraction (XRD),transmission electron microscopy (TEM),and scanning electron microscopy (SEM) were employed to characterize the obtained hybrid photocatalyst.The electron transferred between Ti and C retarded the combination of electron-hole pairs and hastened the transferring of electrons,which enhanced the photocatalytic activity.