Enhanced gas sensing properties of chemiresistors based on ZnO nanorods electrodecorated with Au and Pd nanoparticles
| Autor: | Michele Penza, Marco Alvisi, Elena Dilonardo, Gennaro Cassano |
|---|---|
| Přispěvatelé: | Penza, M., Cassano, G., Alvisi, M. |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Electrochemical synthesis
Electrodeposition Sensor Materials science Nanostructure Galvanic anode 02 engineering and technology 010402 general chemistry 01 natural sciences Hydrothermal circulation law.invention Metal law General Materials Science Electrolysis Mechanical Engineering 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Active layer Chemical engineering Mechanics of Materials visual_art visual_art.visual_art_medium Nanorod 0210 nano-technology Selectivity |
| DOI: | 10.1557/adv.2017.13&partnerID=40&md5=4add823ca300093d6c1de8316f2f344f |
| Popis: | Colloidal Au and Pd nanoparticles (NPs) were directly electrochemically synthesized, by sacrificial anode electrolysis (SAE), on hydrothermal ZnO nanostructures, previously desiccated; further, the functionalized ZnO nanostructures were subjected to thermal annealing at 550°C to obtain stable ZnO nanorods (NRs), superficially decorated by naked metal NPs. The both pristine and metal functionalized ZnO NRs were proposed as active layer in chemiresistive sensors for environmental monitoring to detect pollutant gases (e.g. NO2, C4H10). The effect of the presence and of the chemical nature of the deposited metal NPs on the performance of ZnO NRs-based gas sensor (e.g. sensitivity, selectivity and recovery) was evaluated, comparing the sensing results with those of pristine ZnO NRs. In particular, the gas sensing properties of pristine and metal-functionalized ZnO NRs were studied at an operating temperature of 300°C towards a various range of concentration of different gaseous pollutants. © 2017 Materials Research Society. |
| Databáze: | OpenAIRE |
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