ZnO nanorods/graphene oxide sheets prepared by chemical bath deposition for volatile organic compounds detection
| Autor: | Tarcísio M. Perfecto, Talita Mazon, Cecilia A. Zito, Beatriz Vessalli, Diogo P. Volanti |
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| Přispěvatelé: | CTI, Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scanning electron microscope Oxide Nanotechnology 02 engineering and technology Substrate (electronics) 010402 general chemistry 01 natural sciences Nanocomposites law.invention Acetone chemistry.chemical_compound symbols.namesake law Zinc oxide Materials Chemistry Nanocomposite Sensors Graphene Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering chemistry Mechanics of Materials symbols Nanorod 0210 nano-technology Raman spectroscopy Chemical bath deposition |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.12.075 |
| Popis: | Made available in DSpace on 2018-12-11T16:44:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Graphene-based composites have emerged as gas sensor due to the possibility to obtain higher surface area with additional functional groups. In this paper, ZnO nanorods (ZnO-NR) with controlled size and morphology were grown via chemical bath deposition in mild temperature (90 °C) over gold interdigital tracks deposited on an alumina substrate. Furthermore, it was also possible to obtain by the same method composites with graphene oxide sheets below ZnO-NR structures (GO/ZnO-NR) or ZnO-NR between GO sheets (GO/ZnO-NR/GO) when GO is placed in the bath during the growth of GO/ZnO-NR. The samples were characterized by Raman spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy. These structures were tested as sensors of volatile organic compounds (VOCs), such as acetone, benzene, ethanol and methanol in the concentration range of 10–500 parts per million (ppm). It was found that the optimum working temperature of all sensors was 450 °C. The GO/ZnO-NR/GO composite showed better selectivity due to GO functional groups. In the case of our well-designed sensors, we found that the dominant oxygen species (O2-) on ZnO-NR surface were responsible for the sensors response. These findings offer a new viewpoint for further advance of the sensing performance of one-dimensional ZnO/GO nanocomposites VOCs sensors. Center for Information Technology Renato Archer CTI, Rod. D. Pedro I, KM 143.6 LabMatSus - Laboratory of Materials for Sustainability IBILCE UNESP - Univ Estadual Paulista, Rua Cristóvão Colombo, 2265 LabMatSus - Laboratory of Materials for Sustainability IBILCE UNESP - Univ Estadual Paulista, Rua Cristóvão Colombo, 2265 FAPESP: 2014/17343-0 FAPESP: 2015/05916-9 FAPESP: 2016/04371-1 |
| Databáze: | OpenAIRE |
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