Pr3+-Doped (K0.5Na0.5)NbO3 as a high response optical oxygen sensing agent

被引：23
作者：
Tang, Wei [1 ,2 ]
Sun, Ye [1 ]
Wang, Shaochen [1 ]
Du, Baosheng [1 ]
Yin, Yongqi [1 ]
Liu, Xiao [1 ]
Yang, Bin [1 ]
Cao, Wenwu [1 ,3 ]
Yu, Miao [2 ]
机构：
[1] Harbin Inst Technol, Sch Sci, Condensed Matter Sci & Technol Inst, Harbin 150080, Peoples R China
[2] Harbin Inst Technol, Sch Chem & Chem Engn, State Key Lab Urban Water Resource & Environm, Harbin 150001, Peoples R China
[3] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2016年 / 4卷 / 48期
基金：
中国国家自然科学基金;
关键词：
CHARGE-TRANSFER; ZNO NANOWIRES; GAS; PHOTOLUMINESCENCE; TEMPERATURE; SENSOR; PHASE; FILMS;
D O I：
10.1039/c6tc04216c
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The photoluminescence (PL) properties of post-treated Pr3+-doped (K0.5Na0.5)NbO3 (KNN: Pr3+) have been investigated for oxygen sensing. It is found that both the intensity ratio of the D-1(2)-H-3(4) red emission to the P-3(0)-H-3(4) blue-green emission and their absolute intensity have a strong response to oxygen adsorption at room temperature and elevated temperature. Especially, at 165 degrees C, the D-1(2)-H-3(4) emission intensity measured in a 100% O-2 atmosphere was similar to 3 folds higher than that in 100% N-2, which is the highest response in all PL-based gas sensing oxides reported so far. Moreover, the high oxygen-sensing recoverability and reproducibility have been demonstrated. It is proposed that the intervalence charge transfer mechanism plays a key role in sensing. Together with the inherent ferroelectric and PL properties of KNN: Pr3+, the product may hold considerable potential in multifunctional devices.
引用
收藏
页码：11508 / 11513
页数：6
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