1. Identity statement | |
Reference Type | Journal Article |
Site | mtc-m21b.sid.inpe.br |
Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
Identifier | 8JMKD3MGP5W34M/3GD3G9T |
Repository | sid.inpe.br/mtc-m21b/2014/05.30.02.19.01 (restricted access) |
Last Update | 2014:09.09.19.21.19 (UTC) administrator |
Metadata Repository | sid.inpe.br/mtc-m21b/2014/05.30.02.19.02 |
Metadata Last Update | 2018:06.04.03.04.08 (UTC) administrator |
DOI | 10.1016/j.snb.2013.08.053 |
ISSN | 0250-6874 |
Label | scopus 2014-05 ZanettiRochRodrLong:2014:SoSyCh |
Citation Key | ZanettiRochRodrLong:2014:SoSyCh |
Title | Soft-chemical synthesis, characterization and humidity sensing behavior of WO3/TiO2 nanopowders |
Year | 2014 |
Access Date | 2024, Mar. 29 |
Type of Work | journal article |
Secondary Type | PRE PI |
Number of Files | 1 |
Size | 1585 KiB |
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2. Context | |
Author | 1 Zanetti, Sonia Maria 2 Rocha, Kleper de Oliveira 3 Rodrigues, José Augusto Jorge 4 Longo, Elson |
Resume Identifier | 1 2 3 8JMKD3MGP5W/3C9JHG9 |
Group | 1 2 3 LCP-CTE-INPE-MCTI-GOV-BR |
Affiliation | 1 SENCER - Sensores Cerâmicos Ltda 2 SENCER - Sensores Cerâmicos Ltda 3 Instituto Nacional de Pesquisas Espaciais (INPE) 4 Universidade Estadual Paulista (UNESP) |
Author e-Mail Address | 1 zanettism@gmail.com 2 3 jajr@lcp.inpe.br |
e-Mail Address | marcelo.pazos@inpe.br |
Journal | Sensors and Actuators B: Chemical |
Volume | 190 |
Pages | 40-47 |
History (UTC) | 2018-06-04 03:04:08 :: administrator -> marcelo.pazos@inpe.br :: 2014 |
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3. Content and structure | |
Is the master or a copy? | is the master |
Content Stage | completed |
Transferable | 1 |
Content Type | External Contribution |
Version Type | publisher |
Keywords | EXAFS 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 |
Abstract | Tungsten 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. |
Area | COMB |
Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABCP > Soft-chemical synthesis, characterization... |
doc Directory Content | access |
source Directory Content | there are no files |
agreement Directory Content | there are no files |
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4. Conditions of access and use | |
Language | en |
Target File | 1-s2.0-S0925400513009891-main.pdf |
User Group | administrator marcelo.pazos@inpe.br |
Reader Group | administrator marcelo.pazos@inpe.br |
Visibility | shown |
Archiving Policy | denypublisher denyfinaldraft24 |
Read Permission | deny from all and allow from 150.163 |
Update Permission | not transferred |
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5. Allied materials | |
Mirror Repository | iconet.com.br/banon/2006/11.26.21.31 |
Next Higher Units | 8JMKD3MGPCW/3ET38CH |
Citing Item List | sid.inpe.br/bibdigital/2013/09.25.23.49 4 |
URL (untrusted data) | http://dx.doi.org/10.1016/j.snb.2013.08.053 |
Dissemination | WEBSCI; PORTALCAPES; COMPENDEX; SCOPUS. |
Host Collection | sid.inpe.br/mtc-m21b/2013/09.26.14.25.20 |
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6. Notes | |
Empty Fields | alternatejournal 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 |
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7. Description control | |
e-Mail (login) | marcelo.pazos@inpe.br |
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