钇掺杂纳米TiO2的制备及其降解甲基橙研究

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TiO，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（TiO3）=1．2％时，光催化效果最好，当反应2．5h时，降解率可汰到85％．

Preparation,Characterization of Y3＋ -doped TiO2 and research on its degradation of methyl orange

TiO2 doped with Y3 ＋ was prepared by hydrothermal method, using tetrabutvl titanate as one of the primary raw nmterials at loom temperature. XRD and FF-1R were used to analyze the eustalline phase and stnn＇tural eharaeterizalion. The results show that the structure of TiO2 nanopariicles and that of TiO2 nanoparticles doped with different enutent of Y are anatase;with the inerease of Y3 ＋ ＇s content, the grain size of Y3＋ doped-TiO2 become smaller and smaller, illustrating that the doping has the effect of refining the grain erystal. The photo eatalytie property was measured by the degradation of 20 mg/L methyl orange. When the doped content was 1.2% and the calcination temperature was about 500 ℃, the phntoeatalytic property could he improved effectively,indieating that the doping of Y can effectively increased the photo eatalytie properties of TiO2 , under UV - Light. When the doping amounts is n （ Y3 ＋ ） ： n （ TiO2 ） = 1.2% , the photo catalytie properties of TiO2 is the best, and the degradation rate of methyl orange can reach 85%.