Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 356, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2021.131358
Keywords
Mesoporous material; Colloidal sphere; Gas sensor; Tin dioxide; Plant polyphenol
Funding
- National Natural Science Foundation of China [21701130]
- Key Research and Development Program of Shaanxi [2021GY-225]
- Key Basic Research Program of Science and Technology Commission of Shanghai Municipality [20JC1415300]
- Fundamental Research Funds for the Central Universities
Ask authors/readers for more resources
A self-template synthesis strategy using plant polyphenol as a chelating agent was developed to successfully prepare mesoporous Au-SnO2 nanospheres for low-temperature detection of TEA. The nanospheres showed high response, low detection limit, and fast response time. This strategy has the potential to enhance the sensing performance of gas sensors.
The development of metal oxide semiconductor gas sensor for low-temperature detection of hazardous gases (e. g., triethylamine, TEA) is highly desirable, but still challenging. Herein, a self-template synthesis strategy for mesoporous Au-SnO2 nanospheres was developed using nontoxic, renewable and low-cost plant polyphenol as a main chelating agent, tin ions and chloroauric acid as a metal source. Because of the strong chelate ability of polyphenol, a stable Au/tin-polyphenol-formaldehyde sphere is obtained and used as a precursor. After direct calcination process, Au-SnO2 materials with mesoporous crystalline framework, uniform diameter (-120 nm) and high specific surface area (105.2 m2/g) are successfully prepared. The mesoporous Au-SnO2 nanospheres are further used for TEA sensing. They show high response (5.16) at a low temperature (50 celcius) toward TEA. The detection limit was 0.11 ppm. The decoration of Au species can effectively decrease the activation energy and lower the working temperature. After integration with Bluetooth, the gas sensor can be used for wireless monitoring TEA with a low concentration (10-50 ppm) and fast response (- 30 s). This proposed strategy can be used for mesoporous noble metal-metal oxides and further boost the sensing performance of gas sensor.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available