An easy method of preparing ozone gas sensors based on ZnO nanorods

Author(s)

Catto, Ariadne C. ^[1] ; da Silva, Luis F. ^[2] ; Ribeiro, Caue ^[3] ; Bernardini, Sandrine ^[4] ; Aguir, Khalifa ^[4] ; Longo, Elson ^[2] ; Mastelaro, Valmor. R. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Estadual Paulista, Inst Quim, LIEC, BR-14800900 Araraquara, SP - Brazil

^[3] Embrapa Instrumentacao, BR-13560970 Sao Carlos, SP - Brazil

^[4] Aix Marseille Univ, CNRS, IM2NP, UMR7334, Marseille - France

• Document type: Journal article
• Source: RSC ADVANCES; v. 5, n. 25, p. 19528-19533, 2015.
• Web of Science Citations: 35

Abstract

One-dimensional (1D) ZnO nanorod-like structures were successfully grown via a hydrothermal method to be used as an ozone gas sensor. X-ray diffraction measurements (XRD) and field-emission scanning electron microscopy (FE-SEM) analysis revealed a preferential growth of the nanorod-like structures along the {[}002] direction. Electrical resistance measurements indicated a good sensitivity to different ozone concentrations (0.06-1.19 ppm) as well as long-term stability over a 6 month period at 250 degrees C. In addition, it was observed that the nanorods had a good sensitivity to ozone at room temperature when the sensor was exposed to UV illumination. This study provides an easy and efficient way to obtain 1-D ZnO nanorods exhibiting remarkable properties for applications as ozone gas sensing materials. (AU)

• FAPESP's process: 12/15170-6 - Synthesis and characterization of ZnO thin and thick films : application as gas sensors
• Grantee: Ariadne Cristina Catto
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 13/09573-3 - Synthesis and Characterization of the ZnO/SnO2 Heterostructures obtained by Hydrothermal Method: Gas Sensor Applications
• Grantee: Luís Fernando da Silva
• Support Opportunities: Scholarships in Brazil - Post-Doctoral