Investigation of electronic and chemical sensitization effects promoted by Pt and Pd nanoparticles on single-crystalline SnO nanobelt-based gas sensors
| Autor: | Jae Jin Kim, Pedro H. Suman, Marcelo Ornaghi Orlandi, Martin S. Barbosa, Harry L. Tuller |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), MIT |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Nanobelts
Analyte Materials science Band gap 02 engineering and technology engineering.material 010402 general chemistry Gas sensors 01 natural sciences Catalysis Oxidizing agent Materials Chemistry medicine Pd Electrical and Electronic Engineering Surface sensitization Electronic band structure Instrumentation Sensitization Metals and Alloys Pt 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials SnO medicine.anatomical_structure Chemical engineering Pd nanoparticles engineering Noble metal 0210 nano-technology Selectivity |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2020-12-10T19:38:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-12-12 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) MRSEC Program of the National Science Foundation This work reports on the gas sensor response of undecorated 1D stannous oxide nanobelts and those decorated with Pt and Pd nanoparticles. The sensor device responses to H-2, CO and NO2 were measured in dry air baseline atmosphere as functions of the analyte concentration (1-1000 ppm) and temperature (100-350 degrees C). Noble metal decorated SnO devices exhibited enhanced chemical sensitization, resulting in increased sensitivity upon exposure to reducing gases at different working temperatures. Differences in enhancement levels are attributed to strong electronic sensitization effects that are dependent on the respective Pt and Pd work functions and the unique SnO band structure, characterized by a small band gap. Gas sensing results also showed superior selectivity to H-2 for metal-decorated nanobelts. Based on the findings in this work, we propose an array based on SnO structures capable of detecting and distinguishing reducing and oxidizing gases. Sao Paulo State Univ, Dept Phys Chem, BR-14800900 Araraquara, SP, Brazil MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA Sao Paulo State Univ, Dept Phys Chem, BR-14800900 Araraquara, SP, Brazil FAPESP: 2012/51195-3 FAPESP: 2013/08734-3 FAPESP: 2013/18511-1 FAPESP: 2014/50725-4 CNPq: 447760/2014-9 CNPq: 443138/2016-8 MRSEC Program of the National Science Foundation: DMR - 141,980 |
| Databáze: | OpenAIRE |
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