摘要
以多孔氧化锆(ZrO2)材料的制备与光学性质为基础,讨论了氧空位对光学发光性能的影响及氧化锆发光性质的位形坐标图.以水热法制备的多孔ZrO2粉体具有由结晶不完整的ZrO2颗粒堆积而成的多孔结构,产物的比表面积达151.9m2·g-1.检测了样品的光吸收和光致发光(PL)性能,并用解卷积方法对样品的光致发光谱进行了分析,发现了不同于以前的结果.多孔ZrO2的主要光致发光峰位于蓝紫色光区,而经过H3PO4处理后的样品的发光峰红移至蓝绿色发光区,样品的多孔结构和磷的存在并不能使ZrO2中产生新的发光峰.分析结果显示氧空位在产物中形成一个新的能级,在发光性质中起着捕获电子形成色心而导致荧光发光的作用.
The effect of oxygen vacancy on the optical properties of porous zirconia （ZrO2） was discussed based on the preparation and optical characterization of this material. The configuration coordinate diagram for a discussion of the optical performances of the ZrO2 system was carefully amended, The samples used in the experiments were prepared by the hydrothermal method. The product possesses a porous structure constructed by amorphous zirconia particles and the specific surface area of the product was 151.9 m2. g-1. Deconvolution was used to analyze the photoluminescence （PL） spectra and the results are different in some aspects compared with previous reports, The main PL bands of the as-prepared product were located in the violet to blue region while those of the samples after treatment by H3PO, red-shifted to the blue-green region, Neither the porous structure nor the existence of phosphor reagents in ZrO2 induced any new PL peaks. The oxygen vacancies in the samples formed a new energy level that trapped electrons to form a color center and then luminescent emissions were induced.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2011年第12期2900-2906,共7页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(50774095)
中央高校基本科研业务费-中南大学自由探索计划(2011QNZT075)
大学生创新性实验计划(LE10246)资助项目~~
关键词
多孔ZrO2
光学性质
位形坐标
氧空位
Porous zirconia
Optical property
Configuration-coordinate
Oxygen vacancy
