Preparation and Its UV Photocatalytic Degradation of Rhodamine B of TiO2/g-C3N4 Composites
Titanium dioxide(TiO2)was prepared by sol-gel-high-temperature calcination,and graphitic carbon nitride(g-C3N4)was prepared by high-temperature calcination,and then TiO2/g-C3N4 composites were obtained by ball milling of TiO2 and g-C3N4 powders with different component ratios.The microstructure,crystal structure,chemical bond structure,fluorescence intensity and absorbance of TiO2/g-C3N4 composites were studied by scanning electron microscopy(SEM),X-ray diffraction(XRD),fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),fluorescence spectroscopy and ultraviolet-visible spectroscopy,and the ultraviolet photocatalytic mechanism of TiO2/g-C3N4 on rhodamine B was given.The results show that under the condition of 250 W UV lamp for 150 min,the degradation rate of Rhodamine B within pure g-C3N4 and TiO2 is 79.95% and 70.52%,respectively,while the degradation rate of Rhodamine B within the TiO2/g-C3N4 composites with a weight component ratio of 1:3 can reach 94.42% .In the recovery test,the degradation rate of TiO2/g-C3N4 composites with a weight component ratio of 1:2 at 50 min is 90.33% when recovered five times,and the degradation rate is still 89.5% after ten recycling.
NETL
NSTL
万方数据
