Issue 48, 2016
From the journal:

Journal of Materials Chemistry C

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

Wei Tang,ab   Ye Sun,*a   Shaochen Wang,a   Baosheng Du,a   Yongqi Yin,a   Xiao Liu,a   Bin Yang,a   Wenwu Cao*ac  and  Miao Yu*b  

* Corresponding authors

a Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology, Harbin 150080, China
E-mail: sunye@hit.edu.cn

b State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
E-mail: miaoyu_che@hit.edu.cn

c Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania16802, USA
E-mail: dzk@psu.edu

Abstract

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 1D2–3H4 red emission to the 3P0–3H4 blue-green emission and their absolute intensity have a strong response to oxygen adsorption at room temperature and elevated temperature. Especially, at 165 °C, the 1D2–3H4 emission intensity measured in a 100% O2 atmosphere was ∼3 folds higher than that in 100% N2, 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.

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

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Article information

DOI
https://doi.org/10.1039/C6TC04216C
Article type
Paper
Submitted
28 Sep 2016
Accepted
10 Nov 2016
First published
10 Nov 2016

J. Mater. Chem. C, 2016,4, 11508-11513

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

W. Tang, Y. Sun, S. Wang, B. Du, Y. Yin, X. Liu, B. Yang, W. Cao and M. Yu, J. Mater. Chem. C, 2016, 4, 11508 DOI: 10.1039/C6TC04216C

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