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Synthesis of Co3+ Doped TiO2 by Co-precipitation Route and Its Gas Sensing Properties

Lontio Fomekong, Roussin and Saruhan-Brings, Bilge (2019) Synthesis of Co3+ Doped TiO2 by Co-precipitation Route and Its Gas Sensing Properties. Frontiers in Materials, 6 (252), pp. 1-6. Frontiers Media S.A.. doi: 10.3389/fmats.2019.00252. ISSN 2296-8016.

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Abstract

Undoped and Co-doped TiO2 nanoparticles were synthesized by a facile co-precipitation method and calcined at 700°C. The phase identification carried out by XRD measurements and Raman spectroscopy analysis of calcined powders reveals the formation of mainly anatase phase for undoped TiO2, and 0.5 mol.% Co-doped TiO2 whereas rutile phase for 1 mol.% Co-doped TiO2. The sensors prepared with these powders deposited on interdigital (IDE) sensor platforms were tested toward NO2 and H2 sensing properties at 600◦C. As the undoped and 0.5% Co-doped TiO2 reveal n-type behavior, 1% Co-doped TiO2 shows p-type semi-conductive behavior. One percentage Co-doped TiO2 exhibits good sensing performance toward NO2 while the undoped TiO2 powder yields the best sensor performance toward H2 at 600°C. This indicates that the crystal structure of TiO2 sensing material must be adjusted depending on the nature of target gas. The results indicate that the main factor influencing high temperature gas sensor performance of nanoparticulate TiO2 is either the alteration of its electronic structure or the type of polymorphs.

Item URL in elib:https://elib.dlr.de/129765/
Document Type:Article
Title:Synthesis of Co3+ Doped TiO2 by Co-precipitation Route and Its Gas Sensing Properties
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lontio Fomekong, RoussinRoussin.LontioFomekong (at) dlr.deUNSPECIFIED
Saruhan-Brings, BilgeBilge.Saruhan (at) dlr.deUNSPECIFIED
Date:10 October 2019
Journal or Publication Title:Frontiers in Materials
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:6
DOI :10.3389/fmats.2019.00252
Page Range:pp. 1-6
Publisher:Frontiers Media S.A.
Series Name:Frontiers
ISSN:2296-8016
Status:Published
Keywords:co-precipitation, high-temperature sensor, nitrogen oxides, hydrogen, electronic structure, co-doped TiO2
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Saruhan-Brings, Dr. Bilge
Deposited On:06 Nov 2019 16:12
Last Modified:19 Oct 2020 09:37

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