Preparation of UV-visible light responsive photocatalyst from titania-bearing blast furnace slag modified with(NH_4)_2SO_4  

紫外-可见光催化活性的硫酸铵改性含钛高炉渣光催化剂的制备(英文)

作　　者：雷雪飞[1] 薛向欣[2] 杨合[2] 

机构地区：[1]东北大学(秦皇岛分校)资源与材料学院,秦皇岛066004 [2]东北大学材料与冶金学院,沈阳110819

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第7期1771-1777,共7页中国有色金属学报（英文版）

基　　金：Project (2007CB613504) supported by the National Basic Research Program of China;Project (307009) supported by the Foundation for Key Program of Ministry of Education,China;Project (N110423003) supported by the Fundamental Research Funds for the Central Universities,China;Project (E2012501012) supported by Natural Science Foundation-Steel and Iron Foundation of Hebei Province,China

摘　　要：Sulfate-modified titanium dioxide-bearing blast furnace slag（STBBFS） photocatalysts were prepared by the high energy ball milling method with（NH4）2SO4 and titanium dioxide-bearing blast furnace slag（TBBFS） as raw materials.X-ray photoelectron spectroscopy（XPS）,X-ray diffraction（XRD）,scanning electron microscopy（SEM）,thermogravimetric analysis（TGA）,UV-visible diffuse reflectance absorption spectra（UV-Vis）,adsorption experiment and photocatalytic degradation measurement were conducted to characterize the structure,surface status,light absorption capacity,adsorption capacity and photocatalytic activity of the obtained photocatalysts.The adsorption equilibrium was described by the Langmuir isotherm model with a maximum adsorption capacity of 8.25 mg/g of Cr（VI） ions onto the STBBFS photocatalysts.As a result,sulfation of TBBFS improved the photocatalytic activities of STBBFSx photocatalysts.At a low calcination temperature,the photocatalytic activity of STBBFS300 photocatalyst was markedly higher compared with TBBFSx prepared at high calcination temperature,indicating that the photocatalytic activity of STBBFSx photocatalyst was determined by the balanced result between adsorption capacity and perovskite content.以含钛高炉渣和硫酸铵为原料,利用高能球磨法制备硫酸盐掺杂的含钛高炉渣(STBBFS)光催化剂。利用X射线光电子能谱(XPS)、X 射线衍射(XRD)、扫描电镜(SEM)、紫外-可见吸收光谱(UV-Vis)、热重(TGA)分析以及暗态吸附 Cr(VI)废水、光催化还原 Cr(VI)废水实验对 STBBFS 催化剂的物相、表面结构、光吸收能力、吸附容量以及光催化活性进行表征。结果表明:Cr(VI)在 STBBFS 催化剂表面上的吸附遵循 Langmuir 吸附等温线模型;掺杂硫酸盐后,STBBFS 催化剂的吸附容量增大为 8.25 mg/g;在 300 °C煅烧后,STBBFS 催化剂由于存在较高的钙钛矿含量、吸附容量及表面酸性,从而具有较高的光催化活性。

关 键 词：sulfate modification titanium dioxide-bearing blast furnace slag Cr（VI） adsorption capacity photocatalytic activity 

分 类 号：O643.36[理学—物理化学]