NDLI: The effects of crystallite growth and dopant migration on the carbon monoxide sensing characteristics of nanocrystalline tin oxide based sensor materials

Please wait, while we are loading the content...

Disk-like liquid crystals of transition metal complexes Part 21.‡—Critical molecular structure change from columnar to lamellarliquid crystal in bis(diphenylglyoximato)nickel(II)-based complexes

Effect of alkyl sulfate anion on the mesomorphism of 3,4-dialkoxystilbazole complexes of silver(I)

Novel metal–chelate emitting materials based on polycyclic aromatic ligands for electroluminescent devices

Synthesis and properties of highly soluble third-order optically nonlinear chromophores and methacrylate monomer based on distyrylbenzene

Polymeric malondialdehyde dianils—a novel type of electrically conducting polymers

Photocatalytic activity of titanium oxide prepared by liquid phase deposition (LPD)

Structure, epitaxial growth and nucleation of CaO/SrO interfaces using energy minimisation, molecular dynamics and computer graphics

Visible light-induced long-lived charge separation across a sensitised nanostructured TiO₂–polyviologen membrane

Preparation of CuO thin films on porous BaTiO₃ by self-assembled multibilayer film formation and application as a CO₂ sensor

Soft solution processing for fabrication of lithiated thin-film electrodes in a single synthetic step

Electroreductive deposition of polymeric coatings having Ru^II redox centers on Pt, Pd and sintered Fe–(5–10)%Ni electrodes

Ruthenium(II) thiocyanate complexes containing 4′-(4-phosphonatophenyl)-2,2′:6′,2′′-terpyridine: synthesis, photophysics and photosensitization tonanocrystalline TiO₂ electrodes

Effects of composition and structure on the ionic conductivity of latex polymer electrolyte

The effects of crystallite growth and dopant migration on the carbon monoxide sensing characteristics of nanocrystalline tin oxide based sensor materials

Thermodynamic analysis of phase stability of nanocrystalline titania

Synthesis, structural characterization, thermal stability and electrical properties of the new phases M^IGa(CrO₄)₂ (M^I=Na, K, Rb)

Crystal structure, thermal and magnetic properties of La₃Co₃O₈. Phase relations for LaCoO_3–δ (0.00≤δ≤0.50) at 673 K

Crystal structure, thermal and magnetic properties of La₄Co₃O₉ . Phase relations for La₄Co₃O_10–δ (0.00≤δ≤1.00) at 673 K

Chemical processes involved in the sol–gel preparation of an aluminium oxohydroxide gel from aluminium nitrate in organic medium

X-Ray powder diffraction study of a new vanadium oxide Cr_0.11V₂O_5.16 synthesized by a sol–gel process

Preparation of La_0.3Sr_0.7CoO_3–δ perovskite by thermal decomposition of metal-EDTA complexes

Formation of carbon onions with Pd clusters in a high-resolution electron microscope

Al and Zr pillared acid-activated saponite clays: characterization and properties

Influence of solid-state transformation time on the nucleation and growth of silicalite 1 prepared from layered silicate

Thermal and spectroscopic characterization of polypyrrole formed in zeolite Y

Synthesis in fluoride media and characterisation of aluminosilicate zeolite beta

Formation of mesoporous, zirconium(IV) oxides of controlled surface areas

Imprinting for the assembly of artificial receptors on a silica surface

Journal of Materials Chemistry Vol - 8 Issue - 8

Journal of Materials Chemistry Vol - 8 Issue - 7

Journal of Materials Chemistry Vol - 8 Issue - 6

Journal of Materials Chemistry Vol - 8 Issue - 5

Journal of Materials Chemistry Vol - 8 Issue - 4

Journal of Materials Chemistry Vol - 8 Issue - 3

Journal of Materials Chemistry Vol - 8 Issue - 2

Journal of Materials Chemistry Vol -7

Journal of Materials Chemistry Vol -6

Journal of Materials Chemistry Vol -5

Journal of Materials Chemistry Vol -4

Journal of Materials Chemistry Vol -3

The effects of crystallite growth and dopant migration on the carbon monoxide sensing characteristics of nanocrystalline tin oxide based sensor materials

Content Provider	Royal Society of Chemistry (RSC)
Author	Wright, John D. Chadwick, Alan V. Davis, Steven R.
Copyright Year	1998
Abstract	Tin oxide nanocrystals, both pure and Cu2+ and Fe3+ doped, have been prepared by a sol–gel process. The response of these materials to carbon monoxide in dry air has been investigated as a function of annealing temperature. The growth of the crystallites was monitored by XRPD from room temperature to about 900 °C and the response of the material to CO was studied for materials annealed over that temperature range. All of the materials were shown to respond to low concentrations of CO with a narrow peak in sensitivity at an operating temperature of about 200 °C. A good response to CO was also observed at an operating temperature of about 400 °C. No improvements in selectivity to CO were observed by the addition of either of the cation dopants. The sensitivity to CO was shown to decrease as crystallite size increased. The addition of the metal cation dopants impeded crystallite growth. Our previously reported Cu K-edge and Fe K-edge EXAFS measurements, on the Cu2+ and Fe3+ doped materials respectively, showed the dopant cations to move from ordered Sn4+ substitutional lattice sites in the as-prepared materials to more disordered regions, most likely the surface regions, as the materials were annealed. This dopant migration begins at about 400 °C and is accompanied by a corresponding large decrease in response to CO at an operating temperature of about 200 °C (the peak in sensitivity). This is attributed to the migration of the dopants to the surface of the crystallites and speculative explanations are given. The reduction in response of the same materials at an operating temperature of about 400 °C is not so large, indicating the response mechanisms at 200 and 400 °C to be different.
Starting Page	2065
Ending Page	2071
Page Count	7
File Format	PDF
ISSN	09599428
Volume Number	8
Issue Number	9
Journal	Journal of Materials Chemistry
DOI	10.1039/a803866j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Tin oxide Sol\u2013gel process Carbon monoxide Nucleic acid thermodynamics Powder diffraction Operating temperature Ion Crystallite Metal K-edge Extended X-ray absorption fine structure Dopant Crystal structure
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Electroless deposition and characterization of Fe/FeOx nanoparticles on porous carbon microspheres: structure and surface reactivity

New structural effects in SrMoO₄:Tm³⁺/Ho³⁺ crystals

Zn K-edge EXAFS study of SILAR-grown zinc sulfide thin films

Stoichiometry and structure of copper-doped LiNbO₃ and LiTaO₃

Sulphur-induced structural chemistry of oxide surfaces

Characterization of iron oxide-dispersed activated carbon fibres with Fe K-edge XANES and EXAFS and with water adsorption

Electronic and local structural changes in Li_2+xTi₃O₇ ramsdellite compounds upon electrochemical Li-ion insertion reactions by X-ray absorption spectroscopy

Model oxide supported MoS₂ HDS catalysts: structure and surface properties

Synchrotron X-ray powder diffraction and extended X-ray absorption fine structure spectroscopy studies on nanocrystalline ZrO2–CaO solid solutions

The effects of crystallite growth and dopant migration on the carbon monoxide sensing characteristics of nanocrystalline tin oxide based sensor materials

Similar Documents

Electroless deposition and characterization of Fe/FeOx nanoparticles on porous carbon microspheres: structure and surface reactivity

New structural effects in SrMoO4:Tm3+/Ho3+ crystals

Zn K-edge EXAFS study of SILAR-grown zinc sulfide thin films

Stoichiometry and structure of copper-doped LiNbO3 and LiTaO3

Sulphur-induced structural chemistry of oxide surfaces

Characterization of iron oxide-dispersed activated carbon fibres with Fe K-edge XANES and EXAFS and with water adsorption

Electronic and local structural changes in Li2+xTi3O7 ramsdellite compounds upon electrochemical Li-ion insertion reactions by X-ray absorption spectroscopy

Model oxide supported MoS2 HDS catalysts: structure and surface properties

Synchrotron X-ray powder diffraction and extended X-ray absorption fine structure spectroscopy studies on nanocrystalline ZrO2–CaO solid solutions

The effects of crystallite growth and dopant migration on the carbon monoxide sensing characteristics of nanocrystalline tin oxide based sensor materials

New structural effects in SrMoO₄:Tm³⁺/Ho³⁺ crystals

Stoichiometry and structure of copper-doped LiNbO₃ and LiTaO₃

Electronic and local structural changes in Li_2+xTi₃O₇ ramsdellite compounds upon electrochemical Li-ion insertion reactions by X-ray absorption spectroscopy

Model oxide supported MoS₂ HDS catalysts: structure and surface properties