Self‐healable, recyclable, ultrastretchable, and high‐performance NO 2 sensors based on an organohydrogel for room and sub‐zero temperature and wireless operation
Open accessAbstract
To date, development of high‐performance, stretchable gas sensors operating at and below room temperature (RT) remains a challenge in terms of traditional sensing materials. Herein, we report on a high‐performance NO 2 gas sensor based on a self‐healable, recyclable, ultrastretchable, and stable polyvinyl alcohol–cellulose nanofibril double‐network organohydrogel, which features ultrahigh sensitivity (372%/ppm), low limit of detection (2.23 ppb), relatively fast response and recovery time (41/144 s for 250 ppb NO 2 ), good selectivity against interfering gases (NH 3 , CO 2 , ethanol, and acetone), excellent reversibility, repeatability, and long‐term stability at RT or even at −20°C. In particular, this sensor shows outstanding stability against large deformations and mechanical damages so that it works normally after rapid self‐healing or remolding after undergoing mechanical damage without significant performance degradation, which has major advantages compared to state‐of‐the‐art gas sensors. The high NO 2 sensitivity and selectivity are attributed to the selective redox reactions at the three‐phase interface of gas, gel, and electrode, which is even boosted by applying tensile strain. With a specific electrical circuit design, a wireless NO 2 alarm system based on this sensor is created to enable continuous, real‐time, and wireless NO 2 detection to avoid the risk of exposure to NO 2 higher than threshold concentrations.
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Recent studies have reported the use of hydrogels as the sensitive material for gas-sensing applications such as NO2, NH3, CO2, and O2.
“Recent studies have reported the use of hydrogels as the sensitive material for gas-sensing applications, such as NO2, NH3, CO2, and O2”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [67]
PVA/CNF-glycerol DN organohydrogel has significantly improved water storage and freezing resistance, and could carry out normally after placed at −20°C for a long time.
“Ding et al. [67] used a facile one-pot polymerization method to prepare PVA/cellulose nanofibril (CNF)–glycerol (Gly) DN organohydrogel with significantly improved water storage and freezing resistance (Fig. 4c), which could carry out normally after placed at − 20 °C for a long time”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [67]
Ding et al. [67] developed a NO2 hydrogel sensor capable of operating at room temperature or even at −20 °C using a PVA-CNF DN organohydrogel with a water/Gly binary solvent.
“Ding et al. [67] developed a NO2 hydrogel sensor capable of operating at room temperature or even at − 20 °C, as illustrated in Fig. 8e. They used a PVA–CNF DN organohydrogel with a water/Gly binary solvent to realize high-efficiency sensing of NO2.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [67]
After being cut or remolded, the sensor can still heal, recover and retain its original conductive and sensitive properties perfectly.
“After being cut or remolded, it can still heal, recover and retain its original conductive and sensitive properties perfectly, which implies better endurance and more application possibilities”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [67]
The sensor has ultrahigh sensitivity (372% ppm−1), low LOD (2.23 ppb), fast response and recovery time (41/144 s for 250 ppb NO2), and high selectivity to NO2.
“The sensor has ultrahigh sensitivity (372% ppm−1), low LOD (2.23 ppb), fast response and recovery time (41/144 s for 250 ppb NO2), and high selectivity to NO2.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [67]
Cites
Cai, G., Wang, J., Qian, K., Chen, J., Li, S., & Lee, P. S. (2017) · Advanced Science · doi:10.1002/advs.201600190 · Cited by 921 · see citing works
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Self-citationKim, D., Kim, D., Lee, H., Jeong, Y. R., Lee, S., Yang, G., Kim, H., Lee, G., Jeon, S., Zi, G., et al. (2016) · Advanced Materials · doi:10.1002/adma.201504335 · Cited by 148 · see citing works
Wu, Z., Shi, W., Ding, H., Zhong, B., Huang, W., Zhou, Y., Gui, X., Xie, X., & Wu, J. (2021) · Journal of Materials Chemistry C · doi:10.1039/d1tc02506f · Cited by 121 · see citing works
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Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors.
Luo, Y., Li, J., Ding, Q., Wang, H., Liu, C., & Wu, J. (2023) · Nano-Micro Letters · doi:10.1007/s40820-023-01109-2 · Cited by 236 · see citing works
“[67] used a facile one-pot polymerization method to prepare PVA/cellulose nanofibril (CNF)–glycerol (Gly) DN organohydrogel with significantly improved water storage and freezing resistance (Fig.”
BackgroundMethodSelf-citationWu, Z., Wang, H., Ding, Q., Tao, K., Shi, W., Liu, C., Chen, J., & Wu, J. (2023) · Advanced Functional Materials · doi:10.1002/adfm.202300046 · Cited by 162 · see citing works
Self-citation
- Authors
- Ding, Q., Zhou, Z., Wang, H., Wu, Z., Tao, K., Yang, B., Xie, X., Fu, J., & Wu, J.
- Affiliations
- Sun Yat-sen University (CN)
- Northwestern Polytechnical University (CN)
- Corresponding author
- Wu, Jin
- Venue
- SmartMat
- Publisher
- Wiley
- Published
- 2022-07-29
- Volume
- 4
- Issue
- 1
- ISSN
- 2688-819X (ISSN-L)
- OpenAlex
- W4288514189
- Cited by
- 72
- References
- 5
- Citations by year
- 2026: 10 · 2025: 13 · 2024: 18 · 2023: 26 · 2022: 5
- FWCI
- 4.25
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- SmartMat (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (61801525)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Gas Sensing Nanomaterials and Sensors
- Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
- Physical Sciences › Materials Science › Polymers and Plastics › Conducting polymers and applications
- Keywords
- NO2 gas sensor, organohydrogel, double-network hydrogel, polyvinyl alcohol, cellulose nanofibers, self-healing materials, recyclable sensors, redox sensing, three-phase interface, gas selectivity
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