Room temperature ammonia gas sensor based on ionic conductive biomass hydrogels
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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 [71]
Liu et al. [71] prepared a highly sensitive, non-toxic, and environmentally friendly electrical NH3 hydrogel sensor under humid environment at 25 °C using biomass hydrogel GA and PGA as sensitive composite materials.
“Similarly, Liu et al. [71] prepared a highly sensitive, non-toxic, and environmentally friendly electrical NH3 hydrogel sensor under humid environment at 25 °C using biomass hydrogel GA and poly-L-glutamate (PGA) as sensitive composite materials.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
The sensor showed a response of up to 8.4 to 50 ppm NH3 at 80% RH with a LOD as low as 0.5 ppm, and good NH3 selectivity.
“The sensor showed a response of up to 8.4 to 50 ppm NH3 at 80% RH with a LOD as low as 0.5 ppm, and good NH3 selectivity.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
At high humidity, the sensitive material adsorbs more water to form a condensed water layer, and proton conductivity makes H2O and NH3 start to move.
“At high humidity, the sensitive material adsorbs more water to form a condensed water layer, and the proton conductivity makes H2O and NH3 start to move.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
PGA and GA have good chemical compatibility because of their similar chemical structures.
“As shown in Fig. 9c-d, firstly, PGA and GA have good chemical compatibility because of their similar chemical structures.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
The high response performance of PGA/GA mainly comes from the synergistic effect unique to PGA and GA.
“And the high response performance of PGA/GA mainly comes from the synergistic effect unique to PGA and GA.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
At low humidity, adsorbed water forms a hydrogen bonding network with groups available for proton leap (grotto mechanism), when the device is in weak proton conduction.
“As mentioned above, at low humidity, the adsorbed water will form a hydrogen bonding network with some groups available for proton leap (grotto mechanism), when the device is in weak proton conduction.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
The adsorbed NH3 easily forms ammonium salts with some groups, and the presence of NH4+ and H3O+ ions on the surface of the material and the water layer enhances the mobility of these ions in water, greatly increasing the conductivity of the sensor.
“The adsorbed NH3 easily forms ammonium salts with some groups, and the presence of NH4+ and H3O+ ions on the surface of the material and the water layer enhances the mobility of these ions in water, which greatly increases the conductivity of the sensor.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
During sensing, NH3 is physically adsorbed and dissolved in the ligand water, generating NH4+ ions; carboxylic acid groups rich in GA and PGA can also react with NH3 to generate NH4+.
“In addition, during sensing, NH3 is physically adsorbed and dissolved in the ligand water, generating NH4+ ions. And carboxylic acid groups are rich in GA and PGA, which can also react with NH3 to generate NH4+.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
The appropriate amount of PGA in PGA/GA enables the hydrogel to maintain a certain adsorption capacity for water and NH3.
“Secondly, the appropriate amount of PGA in PGA/GA enables the hydrogel to maintain a certain adsorption capacity for water and NH3.”
From Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors. (2023) · cites this paper as [71]
Cites
Quantitative analysis of ammonia on the breath of patients in end-stage renal failure
Davies, S., Spanel, P., & Smith, D. (1997) · Kidney International · doi:10.1038/ki.1997.324 · Cited by 406 · see citing works
Jun, J., Oh, J., Shin, D. H., Kim, S. G., Lee, J. S., Kim, W., & Jang, J. (2016) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.6b08344 · Cited by 85 · 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
“[71] prepared a highly sensitive, nontoxic, and environmentally friendly electrical NH3 hydrogel sensor under humid environment at 25 °C using biomass hydrogel GA and poly-L-glutamate (PGA) as sensitive composite materials.”
Method
- Authors
- Liu, L., Fei, T., Guan, X., Lin, X., Zhao, H., & Zhang, T.
- Affiliations
- Jilin University (CN)
- Corresponding author
- Fei, Teng
- Zhao, Hongran
- Zhang, Tong
- Venue
- Sensors and Actuators B: Chemical
- Publisher
- Elsevier BV
- Published
- 2020-10
- Volume
- 320
- Pages
- 128318
- ISSN
- 0925-4005 (ISSN-L)
- OpenAlex
- W3027028032
- Cited by
- 69
- References
- 2
- Citations by year
- 2026: 8 · 2025: 8 · 2024: 15 · 2023: 11 · 2022: 15 · 2021: 10 · 2020: 2
- FWCI
- 3.26
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Sensors and Actuators B Chemical (publishedVersion)
- Funders
- Natural Science Foundation Committee (61903150, 61773178)
- China Postdoctoral Science Foundation (801191010412)
- Projects of Science and Technology Development Plan of Jilin Province (20200801037GH)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Gas Sensing Nanomaterials and Sensors
- Physical Sciences › Materials Science › Polymers and Plastics › Conducting polymers and applications
- Physical Sciences › Chemical Engineering › Bioengineering › Analytical Chemistry and Sensors
- Keywords
- ammonia gas sensor, room-temperature gas sensing, ionic conductive hydrogel, poly(L-glutamic acid), glutamate, breath analysis, humidity tolerance, kidney disease diagnosis, quartz crystal microbalance, impedance spectroscopy
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