铽掺杂纳米二氧化钛的制备及光催化性能的研究  

Photocatalytic property of TiO_2 catalyst doped with Tb

作　　者：刘丽静[1] 季喜燕[1] 高俊芳[1] LIULi-Jing, JI Xi-Yan, GAO Jun-Fang(Department of Chemistry, Baotou Teachers College, Baotou 014030, Chin)

机构地区：[1]包头师范学院化学学院,包头014030

出　　处：《四川大学学报（自然科学版）》2018年第2期357-360,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(21364007);内蒙古教育厅自然科学项目(NJZC16236)

摘　　要：以Tb^(3+)掺杂纳米TiO_2为研究内容,采用溶胶-凝胶法合成不同Tb^(3+)掺杂量、不同煅烧温度的Tb^(3+)-TiO_2光催化剂.利用X射线粉末衍射(XRD)、红外(FT=IR)等现代分析技术对Tb^(3+)掺杂TiO_2纳米晶样品的结构进行测试、表征.以孔雀石绿溶液为目标降解物,研究了稀土Tb^(3+)掺杂量和煅烧温度对其光催化活性的影响.实验结果表明:Tb^(3+)掺杂纳米TiO_2能够细化晶粒,提高热稳定性;Tb^(3+)掺杂提高了TiO_2光催化活性.当煅烧温度为400℃时,Tb^(3+)-TiO_2=2.50%的催化剂,在自然光照射下,降解孔雀石绿溶液3h,降解率可达81.1%.The Tb3＋-TiO2 photocatalyst with different amounts of doped Tb3＋ and under different calci- nation temperatures were synthesized by sol-gel method, and characterized by XRD and FT-IR and pho- tocatalytic activity. Malachite green experiment was chosen to evaluate photocatalyst＇s activity. The re- sults showed that the obtained powder is anatase TiO2, and with the Tb3＋ doped, which indicating that Tb3＋ doped rare earth can refine the grain. The photoeatalytie material experiments of malachite green degraded showed that, calcined at 400 ~C, Tb3＋-TiO2 molar ratio of 2.5% catalyst, irradiated without lighting 3 h, the degradation rate could be 81.1%.

关 键 词：溶胶-凝胶法 纳米TiO_2 Tb^(3+)掺杂TiO_2 光催化活性 

分 类 号：O643[理学—物理化学]