07.钇掺杂纳米TiO2的制备及其降解甲基橙的研究

王瑞芬，王福明，杜强，宋金玲，张胤

（1.内蒙古科技大学稀土学院，包头 014010；2.北京科技大学冶金与生态工程学院，北京100083）

关键词:水热法；纳米TiO₂；Y³⁺掺杂；XRD；FT-IR；甲基橙

分类号：TB 34; O 643. 32 文献标识码：A

摘要：以钛酸四丁酯为主要原料，在室温下，采用水热法制备了稀土Y³⁺掺杂的纳米TiO₂光催化剂，分别采用粉末XRD法和FT-IR法对产物进行了晶相和结构表征，分析结果表明，所制备的TiO₂和四种不同掺钇量的TiO₂粒子结构均为锐钛矿型二氧化钛，且随着Y掺杂量的增加，TiO₂的粒径越来越小，说明钇的掺杂有细化晶粒的作用。以20mg/L的甲基橙为目标降解物，研究了掺杂纳米TiO₂粉体的光催化性能，结果表明，钇的掺杂能够有效提高紫外光下甲基橙的降解率，钇的最佳掺杂量(摩尔比)为n(Y³⁺)：n( TiO₂) = 1.2%时，光催化效果最好，当反应2.5h时，降解率达到85%。

Preparation，Characterization of Y³⁺Doped TiO₂and Research on it’s Degredation

Property onMethylOrange

WANG Ruifen^1,2，DU Qiang¹, SONG Jinling¹，ZHANG Yin¹，AN Shengli^1,2

(1.College of Rare Earth, Inner Mongolia University of Science and Technology, Baotou 014010;2.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083)

Keywords：Hydrothermal; Nano-TiO₂; Y³⁺-doped; Methyl orange

Abstract：TiO₂doped with Y³⁺was prepared by hydrothermal method, using tetrabutyltitanate as one of the primary raw materials at room temperature. XRD and FT-IR were used to analysis the crystalline phase and structural characterization. The results show the structure ofTiO₂nanoparticles anddifferent content of Y doped TiO₂nanoparticles are anatase，with the increase of Y³⁺’s content, the grain size ofY³⁺doped-TiO₂become smaller and smaller, this illustrate that doping has the effect of refining grain crystal.The photo catalytic property was measured by the degradation of 20mg/L methyl orange. When the doped content was 1.2% and the calcination temperature was about500℃, the photocatalytic property can be improved effectively. The result shows the doping of Y can effectivelyincrease thephoto catalyticpropertiesof underUV-Light. When the doping amounts is n(Y³⁺)：n( TiO₂) = 1.2%, thephoto catalyticpropertiesof TiO₂is the best one, which thedegradation rate of met hylorange can reach 85%.