二维有序大孔纳米二氧化钛光电子特性研究  

Study on photoelectronic characteristics of two-dimensional ordered macroporous nano-TiO_2

作　　者：李葵英[1] 尹华[1] 单青松[1] 林莹莹[1] 朱瑞平[1] 

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004

出　　处：《燕山大学学报》2015年第6期490-496,共7页Journal of Yanshan University

基　　金：河北省自然科学基金资助项目(E2013203296);河北省教育厅科研计划重点项目基金资助项目(ZH200814)

摘　　要：本文采用反蛋白石制备技术,分别用PS、PMMA、SiO2为模板剂制备二维有序大孔纳米二氧化钛。利用X射线衍射谱、扫描电子显微镜、表面光电压谱,以及电场诱导表面光电压谱讨论样品的微结构和光电子特性。结果发现,选择不同的模板剂可以改变上述二氧化钛薄膜材料的光电阈值,并且可以导致与样品主带隙电荷转移跃迁有关的表面光伏响应发生蓝移。研究结果表明,镧掺杂有利于提高有序大孔纳米二氧化钛骨架的稳定性。The two-dimension ordered macroporous nano-TiO2 were prepared through the similar technology applied to the inverse opal, in which templates such as PS, PMMA and SiO2 were used respectively.SPS, X-ray, SEM and EFISPS were used to analyze the microstructure and photoelectric properties of prepared nano-TiO2 panicles and thin films.The results show that selecting different template can change the photoelectric threshold of the samples, and a blue shift of surface photovohaic response related to the main- band-gap charge transfer transition in nano-TiO2 thin film. In addition, the experimental results reveal that La-doping can enhance the stability of the skeleton of the two-dimension ordered macrporous nano-TiO2.

关 键 词：纳米二氧化钛 二维有序大孔 光子晶体 反蛋白石法 表面光电压谱 

分 类 号：TB383[一般工业技术—材料科学与工程] O649[理学—物理化学]