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Chemosensors
Volume 10
Issue 2
10.3390/chemosensors10020066
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Communication

Upconversion Luminescent Humidity Sensors Based on Lanthanide-Doped MOFs

by
Zhuo Wang
1,2,
Guotao Sun
3,
Jiabo Chen
2,
Yao Xie
4,
Hong Jiang
1 and
Lining Sun
2,3,4,*
1
State Key Laboratory of Marine Resource Utilization in South China Sea & Special Glass Key Lab of Hainan Province, School of Information and Communication Engineering, Hainan University, Haikou 570228, China
2
Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
3
School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
4
Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, China
*
Author to whom correspondence should be addressed.
Chemosensors 2022, 10(2), 66; https://doi.org/10.3390/chemosensors10020066
Submission received: 30 December 2021 / Revised: 27 January 2022 / Accepted: 31 January 2022 / Published: 7 February 2022
(This article belongs to the Special Issue Chemical and Biosensors: A Theme Issue in Honor of Professor Otto S. Wolfbeis)
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Abstract

Lanthanide-doped metal-organic frameworks (Y/Yb/Er-MOF) were synthesized by a low-cost solvothermal method. The obtained Y/Yb/Er-MOF shows the cooperative upconversion luminescence of Yb3+ and upconversion luminescence of Er3+ (Yb3+-sensitized) irradiated by a continuous wave 980 nm laser. In order to explore the potential application of Y/Yb/Er-MOF in relative humidity (RH) sensors, the RH responsiveness of Y/Yb/Er-MOF was investigated by measuring the intensity changes of upconversion luminescence. The Y/Yb/Er-MOF possesses two luminescence centers, in which Yb3+ forms emission at 500 nm through the cooperative luminescence effect, and Er3+ achieves 660 nm emission through excited state absorption and successive energy transfer from Yb3+. Hence, the ratio meter luminescence sensor for RH is constructed based on Y/Yb/Er-MOF. The results show that the response of Y/Yb/Er-MOF to RH presents a linear relationship in the range of 11–95%. The cycle stability of Y/Yb/Er-MOF responses to RH was investigated with the intensity changes of upconversion luminescence, and the recovery ratio was more than 93% each time. Therefore, the Y/Yb/Er-MOF is a humidity-sensitive material with great potential for applications such as humidity sensors.
Keywords: upconversion luminescence; lanthanide luminescence; lanthanide-doped metal-organic frameworks; humidity sensor upconversion luminescence; lanthanide luminescence; lanthanide-doped metal-organic frameworks; humidity sensor
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MDPI and ACS Style

Wang, Z.; Sun, G.; Chen, J.; Xie, Y.; Jiang, H.; Sun, L. Upconversion Luminescent Humidity Sensors Based on Lanthanide-Doped MOFs. Chemosensors 2022, 10, 66. https://doi.org/10.3390/chemosensors10020066

AMA Style

Wang Z, Sun G, Chen J, Xie Y, Jiang H, Sun L. Upconversion Luminescent Humidity Sensors Based on Lanthanide-Doped MOFs. Chemosensors. 2022; 10(2):66. https://doi.org/10.3390/chemosensors10020066

Chicago/Turabian Style

Wang, Zhuo, Guotao Sun, Jiabo Chen, Yao Xie, Hong Jiang, and Lining Sun. 2022. "Upconversion Luminescent Humidity Sensors Based on Lanthanide-Doped MOFs" Chemosensors 10, no. 2: 66. https://doi.org/10.3390/chemosensors10020066

APA Style

Wang, Z., Sun, G., Chen, J., Xie, Y., Jiang, H., & Sun, L. (2022). Upconversion Luminescent Humidity Sensors Based on Lanthanide-Doped MOFs. Chemosensors, 10(2), 66. https://doi.org/10.3390/chemosensors10020066

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