锶、氟双元素改性TiO2光催化材料性能研究  

Performance of titanium oxide photocatalytic materials of strontium and fluorin doping

作　　者：孙彤[1] 翟玉春[2] 马培华[3] 

机构地区：[1]辽宁工学院材料与化学工程学院,辽宁锦州121001 [2]东北大学材料与冶金学院,辽宁沈阳110004 [3]中国科学院青海盐湖研究所,青海西宁810008

出　　处：《功能材料》2008年第2期186-190,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(5007014)

摘　　要：以多孔泡沫镍为载体,采用水热合成法制备了Sr改性和Sr、F共掺杂改性多孔光催化材料,采用XRD、TEM、SEM、FT-IR、UV-vis、XPS对样品进行了表征,并以样品对水中罗丹明B的降解性能为评价指标,对样品的光催化性能进行了评价。样品对水中罗丹明B的光催化降解反应为零级反应。Sr改性样品中生成SrTiO3晶体,TiO2以非晶态存在,光催化性能提高,最佳掺杂量为1.25%。煅烧处理后样品的光催化性能提高,最佳掺杂量为0.25%。0.25%Sr、2.0%F共掺杂改性样品中催化剂主体为锐钛矿型纳米TiO2,其光催化性能优于单一Sr改性样品,500℃煅烧处理使其光催化性能略有提高。The porous strontium doping,strontium and fluorin doping photocatalytic materials with porous nickels as the carriers were prepared by hydrothermal method.The samples were characterized by X-ray diffraction（XRD）,Transmission electron microscopy（TEM）,scanning electron microscopy（SEM）,infra-red（FT-IR）,diffuse reflectance spectroscopy（UV-vis）,X-ray photoelectron spectroscopy（XPS）.The photocatalytic performances of the samples were estimated by degrading Rhodamine B.The reaction of photocatalytic degradation of Rhodamine B follows the zero order kinetic law.There are strontium titanate crystal and titanium dioxide non-crystal in the strontium doping samples.The performances of the photocatalytic materials improve.The optimum doping dosage is 1.25%.After the samples were calcined,the performances of the samples improve.The optimum doping dosage is 0.25%.The base of 0.25% strontium and 2.0% fluorin doping samples are anatase titanium oxide.The photocatalytic performances of the jointly doping samples are better than the samples of strontium singly.After being calcined at 500 centigrade 0.5h,the photocatalytic performance of the photocatalytic materials increases a litter.

关 键 词：泡沫镍 光催化材料 锶 氟 水热合成法 

分 类 号：O643[理学—物理化学] X703[理学—化学]