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将具有光催化潜力的金属元素Ti、Zn、Ni引入凹凸棒黏土(ATPs)结构中,采用浸渍法制备了一系列不同配比的Ti-ATPs,Zn/Ti-ATPs及Ni/Ti-ATPs光催化材料。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、紫外-可见漫反射吸收光谱(UVVis)等方法对改性ATPs的结构、形貌和组成进行了表征。以氙灯(250~800 nm)为光源,用制备的材料作为光催化剂,进行降解盐酸四环素的试验,考察了Ti的单一加入及双金属(Zn/Ti、Ni/Ti)加入对ATPs的光催化改性效果。结果表明,Zn/Ti物质的量比为3∶1、400℃煅烧条件下制备的Zn/Ti-ATPs具有良好的光催化性能,在可见光照射120 min时,20 mg Zn/Ti-ATPs对20 mg/L盐酸四环素的光催化降解率可达94.64%,并且性能稳定。而同样方法制备的Ni/TiATPs没有光催化性能,表明并不是所有具有光催化性能的氧化物都能通过浸渍法对ATPs进行改性。
A series of Ti-ATPs, Zn / Ti-ATPs and Ni / Ti-ATPs with different photocatalytic potential were introduced into attapulgite clay (ATPs) by impregnation method Catalytic material. The structure, morphology and composition of modified ATPs were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-Vis absorption spectroscopy (UVVis) Using xenon lamp (250 ~ 800 nm) as a light source, the prepared material was used as a photocatalyst to degrade tetracycline hydrochloride. The effects of Ti addition and bimetallic (Zn / Ti, Ni / Ti) Modification effect. The results show that the Zn / Ti-ATPs prepared at calcination temperature of 400 ℃ have good photocatalytic activity. When 20 mg Zn / Ti-ATPs are irradiated with 20 mg Zn / Ti-ATPs for 20 min at visible light irradiation, The photocatalytic degradation rate of mg / L tetracycline reached 94.64%, and the performance was stable. However, Ni / TiATPs prepared by the same method have no photocatalytic activity, indicating that not all oxides with photocatalytic properties can modify ATPs by impregnation.