UV-enhanced ozone gas sensing response of ZnO-SnO2 heterojunctions at room temperature

被引：116

作者：

da Silva, Luis F. ^{[1
]}

M'Peko, J. -C. ^{[2
]}

Catto, Ariadne C. ^{[2
]}

Bernardini, Sandrine ^{[3
]}

Mastelaro, Valmor R. ^{[2
]}

Aguir, Khalifa ^{[3
]}

Ribeiro, Caue ^{[4
]}

Longo, Elson ^{[1
]}

机构：

[1] Sao Paulo State Univ, Inst Chem, LIEC, POB 355, BR-14800900 Araraquara, SP, Brazil

[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[3] Aix Marseille Univ, CNRS, IM2NP 7334, F-13397 Marseille, France

[4] EMBRAPA Instrumentacao, Rua 15 Novembro 1452, BR-13560970 Sao Carlos, SP, Brazil

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2017年 / 240卷

基金：

巴西圣保罗研究基金会;

关键词：

Hydrothermal; Heterojunction; ZnO; SnO2; UV light; Ozone sensor; THIN-FILMS; SENSOR;

D O I：

10.1016/j.snb.2016.08.158

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The sensitivity of ZnO-SnO2 heterojunctions to ozone gas was investigated in this work, the two-phase materials of which were prepared via a hydrothermal route, resulting in nanocomposites in which the formation of heterojunctions was confirmed by microscopy analyses. While the sensing effectiveness of these materials is currently verified for application above 150 degrees C, these temperatures are here drastically reduced to room temperature by considering sensing activity under continuous UV irradiation, even for ozone concentrations as low as 20 ppb. This approach resulted in a fast sensing response, a short recovery time and a good selectivity compared to other gases, demonstrating a great potential of such heterojunctions for applications in environmental monitoring devices. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：573 / 579

页数：7

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