水热法制备TiO_2纳米粉体及光催化活性的研究  

Preparation of Titania Nanoparticles and Their Photocatalysis Activity

作　　者：许第发[1] 张世英[1] 游洋[1,2] 林中信[2] 朱熠[1] 

机构地区：[1]长沙学院生物工程与环境科学系,长沙410003 [2]湖南大学材料科学与工程学院,长沙410082

出　　处：《硅酸盐通报》2010年第5期1175-1178,共4页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(50872014);长沙市科技计划项目(k0802097-11)

摘　　要：以硫酸氧钛为原料,采用水热法制备锐钛矿相TiO2纳米粉体,研究了水热反应时间和温度对产物晶型结构的影响,同时通过甲醛废水模型体系考察了TiO2纳米粉体的光催化活性。结果表明,采用水热法,不需经过后续热处理就能制备结晶良好,颗粒尺寸为5～10nm的锐钛矿相纳米TiO2粉体;水热反应温度为140℃,反应2h制备的TiO2纳米粉体在降解甲醛废水实验中,表现出比P25更高的光催化活性。TiO2 nanoparticles are successfully synthesized by hydrothermal method using titanylsulfate and carbamide as raw materials.The as-synthesized samples were characterized by transmission electron microscope（TEM）,X-ray diffraction patterns（XRD） analysis technologies.The effect of the reaction temperature and time on crystalline structure,surface morphology were primarily investigated.Photocatalytic activity of TiO2 nanoparticle was analyzed by a model of formaldehyde waste solution.The results indicated that well-crystallized anatase photo-catalyst with the diameter of 5-10 nm was synthesized by hydrothermal method,the optimal reaction temperature and time was 140 ℃ and 2 h,respectively.The experiment of photocatalytic degradation formaldehyde solution indicated that photocatalytic activity of TiO2 nanoparticle was higher than that of P25.

关 键 词：二氧化钛 水热法 甲醛 光催化活性 

分 类 号：O643[理学—物理化学]