K3V5O14的合成及光催化性能和吸附性能

K3V5O14 was prepared via solid phase method and characterized by powder X-ray diffraction (PXRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The influences of reaction temperatures and times for the structure, morphology and UV-Vis diffuse reflectance spectroscope of K3V5O14 were studied. The photocatalytic activity and adsorption performance were tested in details. The results show the photocatalytic activity of K3V5O14 with layer structure is weak by the degradation of methylene blue (MB) under visible light and the degradation rate is lower than 10% in 75 min. However, the adsorption performance is higher and MB is selected and adsorbed from cationic dyes including MB, methyl orange and Rhodamine B. The adsorption rate is 84.46% at 45 min when the optimal dosage of adsorbent is 0.5 g/L. The adsorption kinetics follows the pseudo-second-order kinetic models and the maximum adsorption capacity is 75.19 mg/g.