Humidity-Activated Ammonia Sensor Based on Carboxylic Functionalized Cross-Linked Hydrogel

Owing to its extensive use and intrinsic toxicity, NH<sub>3</sub> detection is very crucial. Moisture can cause significant interference in the performance of sensors, and detecting NH<sub>3</sub> in high humidity is still a challenge. In this work, a humidity-activated NH<sub>3</sub> sensor was prepared by urocanic acid (URA) modifying poly (ethylene glycol) diacrylate (PEGDA) via a thiol-ene click cross-linking reaction. The optimized sensor achieved a response of 70% to 50 ppm NH<sub>3</sub> at 80% RH, with a response time of 105.6 s and a recovery time of 346.8 s. The sensor was improved for response and recovery speed. In addition, the prepared sensor showed excellent selectivity to NH<sub>3</sub> in high-humidity environments, making it suitable for use in some areas with high humidity all the year round or in high-humidity areas such as the detection of respiratory gas. A detailed investigation of the humidity-activated NH<sub>3</sub>-sensing mechanism was conducted using complex impedance plot (CIP) measurements.

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Publication Details

Journal
Sensors
Published
2024-12-20
DOI
https://doi.org/10.3390/s24248154
Citations
2
Primary Topic
Gas Sensing Nanomaterials and Sensors
Type
article
Field-Weighted Citation Impact
0.42

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article

Humidity-Activated Ammonia Sensor Based on Carboxylic Functionalized Cross-Linked Hydrogel

Yanyu Cui, Yaping Song, Fei Teng, Sen Liu et al.
2 citations
Sensors
Gas Sensing Nanomaterials and Sensors
0.42
article

Humidity-Activated Ammonia Sensor Based on Carboxylic Functionalized Cross-Linked Hydrogel

Yanyu Cui, Yaping Song, Fei Teng, Sen Liu, Wei Zhang, Xia Y, Lichao Liu, Yunlong Yu, Hongran Zhao, Tong Zhang
article en
2 citations

Abstract

Owing to its extensive use and intrinsic toxicity, NH<sub>3</sub> detection is very crucial. Moisture can cause significant interference in the performance of sensors, and detecting NH<sub>3</sub> in high humidity is still a challenge. In this work, a humidity-activated NH<sub>3</sub> sensor was prepared by urocanic acid (URA) modifying poly (ethylene glycol) diacrylate (PEGDA) via a thiol-ene click cross-linking reaction. The optimized sensor achieved a response of 70% to 50 ppm NH<sub>3</sub> at 80% RH, with a response time of 105.6 s and a recovery time of 346.8 s. The sensor was improved for response and recovery speed. In addition, the prepared sensor showed excellent selectivity to NH<sub>3</sub> in high-humidity environments, making it suitable for use in some areas with high humidity all the year round or in high-humidity areas such as the detection of respiratory gas. A detailed investigation of the humidity-activated NH<sub>3</sub>-sensing mechanism was conducted using complex impedance plot (CIP) measurements.

SensorsVol. 24(24)
Jilin University (CN), Naval University of Engineering (CN), State Key Laboratory on Integrated Optoelectronics (CN)
National Natural Science Foundation of China, China Postdoctoral Science Foundation, People's Government of Jilin Province
Clean water and sanitation
Openalex Percentile: Top 36%
Gas Sensing Nanomaterials and Sensors
0.42
DOIOpen Access PDFOpenAlex
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Humidity-Activated Ammonia Sensor Based on Carboxylic Functionalized Cross-Linked Hydrogel — Yanyu Cui, Yaping Song, et al. · Sensors (2024) | TGRS Research Map | TGRS