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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
27/09/2022 |
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Data da última atualização: |
25/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CONTI, P. P.; SANTOS, D. M. dos; GOLDTHORPE, I. A.; CORREA, D. S. |
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Afiliação: |
DANIEL SOUZA CORREA, CNPDIA. |
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Título: |
TiO2 hollow nanofiber/polyaniline nanocomposites for ammonia detection at room temperature. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Chemistry of Nanomaterials for Energy, Biology and More, v. 8, n. 8, e202200154, 2022. |
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Páginas: |
1 - 9 |
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ISSN: |
2199-692X |
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DOI: |
doi.org/10.1002/cnma.202200154 |
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Idioma: |
Inglês |
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Conteúdo: |
Ammonia (NH3) detection has gained considerable attention in agricultural and environmental monitoring, chemical and pharmaceutical processing, and disease diagnosis, which requires the development of sensors with high sensitivity. Herein, we propose a novel gas sensor based on nanocomposites of TiO2 hollow nanofibers and polyaniline (PANI) for the sensitive detection of ammonia at room temperature. TiO2 nanostructures in anatase phase were prepared by the combination of coaxial electrospinning and calcination treatment. The resulting material was mixed with PANI and deposited onto gold interdigitated electrodes (IDEs). The hybrid platforms exhibited superior sensing performance compared to the platform based on their individual phases, which is ascribed to a synergistic effect from p-n heterojunction formation. Specifically, the platforms based on TiO2/PANI nanocomposite showed a fast response towards NH3 (e.g., 55 s at 10 ppm) at room temperature (25°C). Additionally, the platform demonstrated the ability to detect NH3 at low concentrations (10?30 ppm) and a detection mechanism was proposed to explain the results. Overall, these results show the promise of electrospun TiO2 hollow nanofibers/PANI composites for the development of high-performance room temperature ammonia sensors |
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Palavras-Chave: |
Chemiresistive sensors; Gas pollutants; Toxic gas. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1146890/1/P-TiO2-Hollow-Nanofiber-Polyaniline-Nanocomposites-for-Ammonia.pdf
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Marc: |
LEADER 02018naa a2200229 a 4500
001 2146890
005 2022-11-25
008 2022 bl uuuu u00u1 u #d
022 $a2199-692X
024 7 $adoi.org/10.1002/cnma.202200154$2DOI
100 1 $aCONTI, P. P.
245 $aTiO2 hollow nanofiber/polyaniline nanocomposites for ammonia detection at room temperature.$h[electronic resource]
260 $c2022
300 $a1 - 9
520 $aAmmonia (NH3) detection has gained considerable attention in agricultural and environmental monitoring, chemical and pharmaceutical processing, and disease diagnosis, which requires the development of sensors with high sensitivity. Herein, we propose a novel gas sensor based on nanocomposites of TiO2 hollow nanofibers and polyaniline (PANI) for the sensitive detection of ammonia at room temperature. TiO2 nanostructures in anatase phase were prepared by the combination of coaxial electrospinning and calcination treatment. The resulting material was mixed with PANI and deposited onto gold interdigitated electrodes (IDEs). The hybrid platforms exhibited superior sensing performance compared to the platform based on their individual phases, which is ascribed to a synergistic effect from p-n heterojunction formation. Specifically, the platforms based on TiO2/PANI nanocomposite showed a fast response towards NH3 (e.g., 55 s at 10 ppm) at room temperature (25°C). Additionally, the platform demonstrated the ability to detect NH3 at low concentrations (10?30 ppm) and a detection mechanism was proposed to explain the results. Overall, these results show the promise of electrospun TiO2 hollow nanofibers/PANI composites for the development of high-performance room temperature ammonia sensors
653 $aChemiresistive sensors
653 $aGas pollutants
653 $aToxic gas
700 1 $aSANTOS, D. M. dos
700 1 $aGOLDTHORPE, I. A.
700 1 $aCORREA, D. S.
773 $tChemistry of Nanomaterials for Energy, Biology and More$gv. 8, n. 8, e202200154, 2022.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
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Registro |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
05/12/2017 |
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Data da última atualização: |
06/12/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
ALMEIDA, L. G.; JORGE, A. de P.; SILVA, E. M. da; MAGALHAES, P. C.; SANTOS, H. R. B.; FARIAS, M. E. de; GUILHERME, L. R. G. |
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Afiliação: |
LORENA GABRIELA ALMEIDA, Universidade Federal de Lavras; ADELCIO DE PAULA JORGE, Universidade Federal de Lavras; EDER MARCOS DA SILVA, Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; HUGO RAFAEL BENTZEN SANTOS, Universidade Federal de Lavras; MÁRCIO ESPINOSA DE FARIAS, Universidade Federal de Lavras; LUIZ ROBERTO GUIMARÃES GUILHERME, Universidade Federal de Lavras. |
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Título: |
Growth and biochemical responses of maize cultivated in soils contaminated with cadmium and zinc. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Revista Brasileira de Milho e Sorgo, Sete Lagoas, v. 16, n. 2, p. 193-203, 2017. |
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DOI: |
10.18512/1980-6477/rbms.v16n2p193-203 |
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Idioma: |
Inglês |
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Conteúdo: |
Contamination with trace elements is characterized by an abiotic stress that represents a limiting factor in agricultural production. Considering that cadmium (Cd) and Zinc (Zn) are physically and chemically similar, they can interact with the environment, causing antagonistic or synergistic effects. In this sense, physiological mechanisms to exclude, detoxify or compartmentalize the excess of those trace elements is crucial for the survival of the plants under conditions of high concentrations of these elements. In order to understand the responses of the species sensible to the presence of Cd and Zn, this study aimed to access the behavior of maize plants (Zea mays L.) cultivated in Cambisoils and Latosol with growing concentrations of Cd/Zn in a 21 days period. Growth and biochemical analyzes were performed such as antioxidant enzyme SOD, CAT and APX activity, hydrogen peroxide and lipid peroxidation. The data obtained evidenced the specific behavior of maize plants grown in Cambisoils compared to Latosol, showing a superior activity of all the enzymes analyzed, and also a lower content of hydrogen peroxide and lipid peroxidation. The interaction between both the elements resulted in a synergistic effect, negatively influencing all the analyzed parameters. |
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Thesagro: |
Bioquímica vegetal; Enzima; Sinergismo. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/168281/1/Growth-biochemical.pdf
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Marc: |
LEADER 02048naa a2200241 a 4500
001 2081593
005 2017-12-06
008 2017 bl uuuu u00u1 u #d
024 7 $a10.18512/1980-6477/rbms.v16n2p193-203$2DOI
100 1 $aALMEIDA, L. G.
245 $aGrowth and biochemical responses of maize cultivated in soils contaminated with cadmium and zinc.$h[electronic resource]
260 $c2017
520 $aContamination with trace elements is characterized by an abiotic stress that represents a limiting factor in agricultural production. Considering that cadmium (Cd) and Zinc (Zn) are physically and chemically similar, they can interact with the environment, causing antagonistic or synergistic effects. In this sense, physiological mechanisms to exclude, detoxify or compartmentalize the excess of those trace elements is crucial for the survival of the plants under conditions of high concentrations of these elements. In order to understand the responses of the species sensible to the presence of Cd and Zn, this study aimed to access the behavior of maize plants (Zea mays L.) cultivated in Cambisoils and Latosol with growing concentrations of Cd/Zn in a 21 days period. Growth and biochemical analyzes were performed such as antioxidant enzyme SOD, CAT and APX activity, hydrogen peroxide and lipid peroxidation. The data obtained evidenced the specific behavior of maize plants grown in Cambisoils compared to Latosol, showing a superior activity of all the enzymes analyzed, and also a lower content of hydrogen peroxide and lipid peroxidation. The interaction between both the elements resulted in a synergistic effect, negatively influencing all the analyzed parameters.
650 $aBioquímica vegetal
650 $aEnzima
650 $aSinergismo
700 1 $aJORGE, A. de P.
700 1 $aSILVA, E. M. da
700 1 $aMAGALHAES, P. C.
700 1 $aSANTOS, H. R. B.
700 1 $aFARIAS, M. E. de
700 1 $aGUILHERME, L. R. G.
773 $tRevista Brasileira de Milho e Sorgo, Sete Lagoas$gv. 16, n. 2, p. 193-203, 2017.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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