TiO_(2)/Ag_(3)PO_(4)光催化剂的制备及性能研究

Preparation and Properties of TiO_(2)/Ag_(3)PO_(4)

水污染问题一直是全球关注的焦点,其中工业废水的排放是水污染中最重要也是最棘手的问题之一,如何去除废水中的有机污染物已经成为国内外各界人士面临的一大难题。采用沉淀转化法制备了TiO_(2)/Ag_(3)PO_(4)复合光催化剂,进行了X射线衍射仪(XRD)、紫外可见漫反射吸收光谱(UV-Vis DRS)、傅里叶变换红外光谱(FT-IR)表征,结果表明TiO_(2)/Ag_(3)PO_(4)是一种可见光催化材料。在模拟太阳光的条件下,测定了TiO_(2)/Ag_(3)PO_(4)复合光催化剂对甲磺酸吉米沙星(GEM)的降解性能。结果表明,在最佳反应条件下TiO_(2)/Ag_(3)PO_(4)复合光催化剂对甲磺酸吉米沙星有良好的降解效果,降解率可达到95.5%.

The issue of water pollution has been the focus of global concern,among which the discharge of industrial wastewater is one of the most important and difficult problems in water pollution.In this work,TiO_(2)/Ag_(3)PO_(4) composite photocatalyst was prepared by precipitation conversion method and was characterized by XRD,UV-Vis DRS and FT-IR,which indicate that it was a visible catalytic material.The degradation of gemifloxacin mesylate(GEM)by TiO_(2)/Ag_(3)PO_(4) composite photocatalyst was determined under the conditions of simulated sunlight.The results showed that when the initial concentration of GEM was 20 mg/L,pH was 3.37,the catalyst dosage of TiO_(2)/Ag_(3)PO_(4)was 0.8 g/L,and the illumination time of xenon lamp 500 W was 110 min,the degradation rate could reach 95.5%.