Gas-sensing properties and modeling of silver doped potassium hollandite

被引：15

作者：

Fort, Ada ^{[1
]}

Addabbo, Tommaso ^{[1
]}

Vignoli, Valerio ^{[1
]}

Bertocci, Francesco ^{[1
]}

Mugnaini, Marco ^{[1
]}

Atrei, Andrea ^{[2
]}

Gregorkiewitz, Michele ^{[3
]}

机构：

[1] Univ Siena, Dipartimento Ingn Informaz & Sci Matemat, I-53100 Siena, Italy

[2] Univ Siena, Dipartimento Biotecnol Chim & Farm, I-53100 Siena, Italy

[3] Univ Siena, Dipartimento Sci Fis Terra & Ambiente, I-53100 Siena, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 194卷

关键词：

Octahedral molecular sieve; Hollandite; Metal oxide semiconductor; Chemical sensor model; Surface states; CO; NOx; MANGANESE OXIDES; CATION DISPLACEMENTS; CO OXIDATION; METAL-OXIDES; CRYPTOMELANE; SENSORS; TEMPERATURE; OMS-2; MECHANISM; RESPONSES;

D O I：

10.1016/j.snb.2013.12.102

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 NO,. The response to test gases was evaluated in a temperature interval from 200 to 350 degrees C where surface phenomena 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. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：427 / 439

页数：13

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