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1. Identity statement
Reference TypeJournal Article
Sitemtc-m21b.sid.inpe.br
Holder Codeisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identifier8JMKD3MGP5W34M/3GD3G9T
Repositorysid.inpe.br/mtc-m21b/2014/05.30.02.19.01   (restricted access)
Last Update2014:09.09.19.21.19 (UTC) administrator
Metadata Repositorysid.inpe.br/mtc-m21b/2014/05.30.02.19.02
Metadata Last Update2018:06.04.03.04.08 (UTC) administrator
DOI10.1016/j.snb.2013.08.053
ISSN0250-6874
Labelscopus 2014-05 ZanettiRochRodrLong:2014:SoSyCh
Citation KeyZanettiRochRodrLong:2014:SoSyCh
TitleSoft-chemical synthesis, characterization and humidity sensing behavior of WO3/TiO2 nanopowders
Year2014
Access Date2024, Mar. 29
Type of Workjournal article
Secondary TypePRE PI
Number of Files1
Size1585 KiB
2. Context
Author1 Zanetti, Sonia Maria
2 Rocha, Kleper de Oliveira
3 Rodrigues, José Augusto Jorge
4 Longo, Elson
Resume Identifier1
2
3 8JMKD3MGP5W/3C9JHG9
Group1
2
3 LCP-CTE-INPE-MCTI-GOV-BR
Affiliation1 SENCER - Sensores Cerâmicos Ltda
2 SENCER - Sensores Cerâmicos Ltda
3 Instituto Nacional de Pesquisas Espaciais (INPE)
4 Universidade Estadual Paulista (UNESP)
Author e-Mail Address1 zanettism@gmail.com
2
3 jajr@lcp.inpe.br
e-Mail Addressmarcelo.pazos@inpe.br
JournalSensors and Actuators B: Chemical
Volume190
Pages40-47
History (UTC)2018-06-04 03:04:08 :: administrator -> marcelo.pazos@inpe.br :: 2014
3. Content and structure
Is the master or a copy?is the master
Content Stagecompleted
Transferable1
Content TypeExternal Contribution
Version Typepublisher
KeywordsEXAFS
Extended Xray absorption fine structure (EXAFS) spectroscopies
Polymeric precursor methods
Situ XANES
Structural and surface characterization
Temperature-programmed reduction
WO<sub>3</sub>/TiO <sub>2</sub>
X-ray absorption near edge spectroscopy
Chemisorption
Electric properties
Extended X ray absorption fine structure spectroscopy
Humidity sensors
Nanostructured materials
Polymers
Pore size
Spectrometry
Synthesis (chemical)
Transmission electron microscopy
X ray diffraction
X ray powder diffraction
Titanium dioxide
AbstractTungsten oxide/titania (WO3/TiO2) nanopowders were synthesized by the polymeric precursor method which varied the WO3 content between 0 and 10 mol%. The powders were thermally treated in a conventional furnace and their structural, microstructural and electric properties were evaluated by X-ray diffraction (XRD), Raman spectrometry, N 2 physisorption, NH3 chemisorption, temperature-programmed reduction (TPR), X-ray absorption near-edge spectroscopy (XANES) in situ XANES and extended X-ray absorption fine structure spectroscopy (EXAFS) and transmission electron microscopy (TEM). XRD and Raman spectrometry confirmed the homogeneous distribution of an amorphous WO3 phase in the TiO 2 matrix which stabilized the anatase phase through the generation of [TiO5·V0] or [TiO5·V 0] complex sites. Conventional TPR-H2 (temperature programmed reduction) along with XANES TPR-H2 and XANES TPR-EtOH showed that WO3/TiO2 sample reduction occurs through the formation of these complex clusters. Moreover, the addition of WO3 promoted an increase in the surface acidity of doped samples as revealed by NH3 chemisorption. The WO3/TiO2 bulk-ceramic samples were further used to estimate their potential application in a humidity sensor in the range of 15-85% relative humidity. Probable reasons that lead to the different humidity sensor responses of samples were given based on the structural and surface characterizations. Correlation between the sensing performance of the sensor and its structural features are also discussed. Although all samples responded as a humidity sensor, the W2T sample (2 mol% added WO3) excelled for sensitivity due to the increase in acid sites, optimum mean pore size and pore size distribution.
AreaCOMB
Arrangementurlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABCP > Soft-chemical synthesis, characterization...
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4. Conditions of access and use
Languageen
Target File1-s2.0-S0925400513009891-main.pdf
User Groupadministrator
marcelo.pazos@inpe.br
Reader Groupadministrator
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Visibilityshown
Archiving Policydenypublisher denyfinaldraft24
Read Permissiondeny from all and allow from 150.163
Update Permissionnot transferred
5. Allied materials
Mirror Repositoryiconet.com.br/banon/2006/11.26.21.31
Next Higher Units8JMKD3MGPCW/3ET38CH
Citing Item Listsid.inpe.br/bibdigital/2013/09.25.23.49 4
URL (untrusted data)http://dx.doi.org/10.1016/j.snb.2013.08.053
DisseminationWEBSCI; PORTALCAPES; COMPENDEX; SCOPUS.
Host Collectionsid.inpe.br/mtc-m21b/2013/09.26.14.25.20
6. Notes
Empty Fieldsalternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn lineage mark month nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarymark tertiarytype
7. Description control
e-Mail (login)marcelo.pazos@inpe.br
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