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.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
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
关键词
水热法
TIO2纳米带
催化活性
hydrothermal method
TiO2 nanoribbon
photocatalytic activity
