Autor segons l'article: Alagh A; Annanouch FE; Youssef KA; Bittencourt C; Güell F; Martínez-Alanis PR; Reguant M; Llobet E
Departament: Enginyeria Electrònica, Elèctrica i Automàtica
Autor/s de la URV: LLOBET VALERO, EDUARD
Codi de projecte: Grant agreement No. 713679
Paraules clau: Tungsten disulphide Tmds Gas sensors Functionalization Cvd Aacvd
Resum: In this work tungsten disulphide nanostructures loaded with platinum-oxide (PtO), or palladium-oxide (PdO) were grown directly onto alumina substrates. This was achieved using a combination of aerosol-assisted chemical vapour deposition (AA-CVD) method with atmospheric pressure CVD technique. At first, tungsten oxide nanowires loaded with either PtO or PdO nanoparticles were successfully co-deposited via AA-CVD followed by sulfurization at 900 °C in the next step. The morphological, structural, and chemical characteristics were investigated using FESEM, TEM, XRD, XPS and Raman spectroscopy. The results confirm the presence of PdO and PtO in the WS2 host matrix. Gas sensing attributes of loaded and pristine WS2 sensors were investigated, at room temperature, towards different analytes (NO2, NH3, H2 etc.). Both pristine and metal-oxide loaded WS2 gas sensors show remarkable responses at room temperature towards NO2 detection. Further, the loaded sensors demonstrated stable, reproducible, ultrasensitive, and enhanced gas sensing response, with a detection limit below 25 ppb. Additionally, the effect of ambient humidity on the sensing response of both loaded and pristine sensors was investigated for NO2 gas. The response of PtO loaded sensor considerably decreased in humid environments, while the response for pristine and PdO loaded sensors increased. However, slightly heating (at 100 °C) the sensors, suppresses the influence of humidity. Finally, the long-term stability of different sensors is investigated, and the results demonstrate high stability with repeatable results after 6 weeks of gas sensing tests. This work exploits an attractive pathway to add functionality in the transition metal dichalcogenide host matrix.
Àrees temàtiques: Surfaces, coatings and films Química Odontología Nutrição Metals and alloys Medicina ii Medicina i Materials chemistry Materiais Interdisciplinar Instruments & instrumentation Instrumentation Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Electronic, optical and magnetic materials Electrochemistry Electrical and electronic engineering Educação física Educação Economia Condensed matter physics Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, analytical Biotecnología Biodiversidade Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: eduard.llobet@urv.cat
Identificador de l'autor: 0000-0001-6164-4342
Data d'alta del registre: 2022-06-04
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0925400522005470
Programa de finançament: Marie Skłodowska-Curie Actions - European Union's Horizon 2020 research and innovation programme
Referència a l'article segons font original: Sensors And Actuators B-Chemical. 364
Referència de l'ítem segons les normes APA: Alagh A; Annanouch FE; Youssef KA; Bittencourt C; Güell F; Martínez-Alanis PR; Reguant M; Llobet E (2022). PdO and PtO loaded WS2 boosts NO2 gas sensing characteristics at room temperature. Sensors And Actuators B-Chemical, 364(), -. DOI: 10.1016/j.snb.2022.131905
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Acrònim: MFP
DOI de l'article: 10.1016/j.snb.2022.131905
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2022
Acció del programa de finançament: Martí i Franquès COFUND Doctoral Programme
Tipus de publicació: Journal Publications
Repositori URV