稀土Gd^(3+)掺杂TiO_2纳米带的制备及其光催化性能研究  

Preparation and Photocatalytic Properties of Gd^(3+)-doped TiO_2 Nanoribbons

作　　者：朱林[1] 曹立新[1] 苏革[1] 柳伟[1] 刘辉[1] 宋亮[1] 

机构地区：[1]中国海洋大学材料科学与工程研究院,青岛266100

出　　处：《人工晶体学报》2011年第3期579-583,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(50672089)资助项目;2008年教育部新世纪人才支持计划(NCET-08-0511)资助项目;山东省优秀中青年科学家奖励基金(BS2010CL049)资助项目

摘　　要：以水热法制备出的钛酸盐纳米带为原料,利用二次水热反应制备了Gd3+掺杂TiO2纳米带。采用XRD、TEM和N2吸附-脱吸等手段对样品的晶型、微观形貌及比表面积进行了表征,讨论了Gd3+掺杂浓度、二次水热温度对材料结构及性能的影响。研究结果表明,Gd3+的掺杂没有影响原有样品的晶型,样品保持了锐钛矿相,但二次水热温度过高会破坏纳米带的形状,掺杂提高了样品的光催化活性,最佳掺杂量为5.0%。以掺杂量为5.0%、二次水热温度为180°C制备出的样品为光催化剂降解甲基橙,在光照180 min后,甲基橙的降解率可达68%。Using titanate nanoribbons prepared by hydrothermal method as precursor,and Gd3＋-doped TiO2 nanoribbons were synthetized by the second hydrothermal method.The microstructures,morphology and the specific surface area of the sample were characterized by XRD,TEM and N2 absorption-desorption experiment.The effect of Gd3＋ concentrations and the second hydrothermal temperatures on the properties were discussed.The experiment results showed that Gd3＋-doped TiO2 nanoribbons retained the anatase phase,nevertheless,morphology of the nanoribbons were destroyed if the second hydrothermal temperature was too high.The photocatalytic activities of the Gd3＋-doped TiO2 nanoribbons improved by doping.The optimal dopant concentration of Gd3＋ was 5.0%.The sample prepared at 180 ℃ doped with 5.0% Gd3＋ showed the best photocatalytic activity and the methyl orange concentration reduced as much as 68% after 180 min of reaction.

关 键 词：水热法 TIO2纳米带 催化活性 

分 类 号：TP104[自动化与计算机技术—控制理论与控制工程]