离子液体水热法辅助合成稀土Ce掺杂ZnO纳米材料的制备及其应用研究

以1-甲基咪唑和氯代正丁烷为原料,合成1-丁基-3-甲基咪唑氯盐离子液体;以醋酸锌Zn(Ac)2]、硫酸锌(ZnSO4)和氯化锌(ZnCl2)为锌源,在1-丁基-3-甲基咪唑氯盐离子液体和丙氨酸体系中与硝酸铈反应,经水热合成法制备得到Ce掺杂的纳米ZnO。采用扫描电子显微镜(SEM)、紫外-可见光吸收光谱(UV-Vis)、X射线衍射仪(XRD)、X射线光电子能谱分析(XPS)和红外光谱(FT-IR)对产品进行表征。以亚甲基蓝(MB)为目标降解物,采用UV-Vis检测,考察了Ce掺杂的纳米ZnO的光催化活性。研究表明,焙烧温度对光催化的晶体结构和光催化活性产生较大的影响;2%Ce/ZnO、焙烧温度为500℃、催化时间为30 min、亚甲基蓝用量0.05 g、pH值为10时降解率可达99.5%以上。

Hydrothermal Synthesis of Rare Earth Ce Doped ZnO Nanomaterials by Ionic Liquid and Its Application

1-Butyl-3-methylimidazole chloride ionic liquid was synthesized from 1-methylimidazole and n-butane chloride.Ce-doped nano-ZnO was prepared by the hydrothermal method from 1-butyl-3-methylimidazole chloride ionic liquids and alanine using Zn(Ac)2,ZnSO4 and ZnCl2 as zinc sources.The products were characterized by Scanning Election Microscope(SEM),UV-Vis,X-Ray Diffractomele(XRD),X-Ray Photoelectron Spectroscopy(XPS)and Infraec Spetroscopy(IR).The photocatalytic activity of Ce-doped nano-ZnO was investigated by UV-Vis with methylene blue(MB)as the target degradation product.The results showed that the calcination temperature has a great influence on the crystal structure and photocatalytic activity,and the degradation rate can reach 99.5%at 2%Ce/ZnO,calcination temperature of 500℃,catalytic time of 30 min,dosage of 0.05 g and pH value of 10.