In this paper the gas sensing properties of Ag–K-hollandite prepared by K–Ag ion exchange are investigated. The proposed material was used as the active layer of micromachined conductometric gas sensors and tested in different environmental conditions with a number of target gases such as CO and NOx . The response to test gases was evaluated in a temperature interval from 200 to 350 ◦ C where surface phe- nomena can completely explain the sensor behavior. The proposed material was studied also by means of XPS and thermal analyses. The investigated material is a p-type semiconductor and shows a reproducible response and a complete recovery. Data obtained are discussed and a model based on surface states describing the material behavior is proposed.
Fort, A., Addabbo, T., Vignoli, V., Bertocci, F., Mugnaini, M., Atrei, A.M., et al. (2014). Gas-sensing properties and modeling of silver doped potassium hollandite. SENSORS AND ACTUATORS. B, CHEMICAL, 194, 427-438 [10.1016/j.snb.2013.12.102].
Gas-sensing properties and modeling of silver doped potassium hollandite
FORT, ADA;ADDABBO, TOMMASO;VIGNOLI, VALERIO;BERTOCCI, FRANCESCO;MUGNAINI, MARCO;ATREI, ANDREA MASSIMO;GREGORKIEWITZ, MICHAEL
2014-01-01
Abstract
In this paper the gas sensing properties of Ag–K-hollandite prepared by K–Ag ion exchange are investigated. The proposed material was used as the active layer of micromachined conductometric gas sensors and tested in different environmental conditions with a number of target gases such as CO and NOx . The response to test gases was evaluated in a temperature interval from 200 to 350 ◦ C where surface phe- nomena can completely explain the sensor behavior. The proposed material was studied also by means of XPS and thermal analyses. The investigated material is a p-type semiconductor and shows a reproducible response and a complete recovery. Data obtained are discussed and a model based on surface states describing the material behavior is proposed.File | Dimensione | Formato | |
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https://hdl.handle.net/11365/46138
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