Author, as appears in the article.: Casanova-Cháfer J, Navarrete E, Noirfalise X, Umek P, Bittencourt C, Llobet E

Department: Enginyeria Electrònica, Elèctrica i Automàtica

e-ISSN: 1424-8220

URV's Author/s: Llobet Valero, Eduard / Navarrete Gatell, Èric

Keywords: Sensitivity Room-temperature Relative humidity effect Networks Mwcnts Metal nanoparticles Mechanisms Iridium oxide Ir Humidity sensor Gold Functionalization Films Chemoresistive gas sensor Carbon nanotubes metal nanoparticles iridium oxide chemoresistive gas sensor carbon nanotubes

Abstract: The properties of multi-wall carbon nanotubes decorated with iridium oxide nanoparticles (IrOx-MWCNTs) are studied to detect harmful gases such as nitrogen dioxide and ammonia. IrOx nanoparticles were synthetized using a two-step method, based on a hydrolysis and acid condensation growth mechanism. The metal oxide nanoparticles obtained were employed for decorating the sidewalls of carbon nanotubes. Iridium-oxide nanoparticle decorated carbon nanotube material showed higher and more stable responses towards NH3 and NO2 than bare carbon nanotubes under different experimental conditions, establishing the optimal operating temperatures and estimating the limits of detection and quantification. Furthermore, the nanomaterials employed were studied using different morphological and compositional characterization techniques and a gas sensing mechanism is proposed.

Thematic Areas: Zootecnia / recursos pesqueiros Química Medicine (miscellaneous) Medicina veterinaria Medicina iii Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Linguística e literatura Letras / linguística Interdisciplinar Instruments & instrumentation Instrumentation Information systems Geografía Geociências Farmacia Engineering, electrical & electronic Engenharias iv Engenharias iii Engenharias ii Engenharias i Electrochemistry Electrical and electronic engineering Educação física Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, analytical Biotecnología Biodiversidade Biochemistry Atomic and molecular physics, and optics Astronomia / física Arquitetura, urbanismo e design Analytical chemistry

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 14248220

Author's mail: eric.navarrete@urv.cat eduard.llobet@urv.cat eric.navarrete@urv.cat

Author identifier: 0000-0001-6164-4342

Record's date: 2023-02-18

Journal volume: 19

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.mdpi.com/1424-8220/19/1/113

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Sensors. 19 (1):

APA: Casanova-Cháfer J, Navarrete E, Noirfalise X, Umek P, Bittencourt C, Llobet E (2019). Gas Sensing with Iridium Oxide Nanoparticle Decorated Carbon Nanotubes. Sensors, 19(1), -. DOI: 10.3390/s19010113

Article's DOI: 10.3390/s19010113

Entity: Universitat Rovira i Virgili

Journal publication year: 2019

Publication Type: Journal Publications