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Enhanced gas sensing properties of chemiresistors based on ZnO nanorods electrodecorated with Au and Pd nanoparticles

TitleEnhanced gas sensing properties of chemiresistors based on ZnO nanorods electrodecorated with Au and Pd nanoparticles
Publication TypePresentazione a Congresso
Year of Publication2017
AuthorsPenza, Michele, Cassano Gennaro, and Alvisi Marco
Conference NameMRS ADVANCES
PublisherMaterials Research Society
KeywordsElectrochemical synthesis, Electrodeposition, sensor
Abstract

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.

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85041312030&doi=10.1557%2fadv.2017.13&partnerID=40&md5=4add823ca300093d6c1de8316f2f344f
DOI10.1557/adv.2017.13
Citation Key 20.500.12079_5787