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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
20/04/2023 |
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Data da última atualização: |
20/04/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GEOVO, J. D. C.; TORRES, J. A.; GIROTO, A. S.; ROCHA, F. C. N.; GARCIA, M. M.; SILVA, G. T. S. T.; SOUZA, J. R. C.; OLIVEIRA, J. A. de; RIBEIRO, C.; NOGUEIRA, A. E. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Evaluation of the activity and selectivity of mesoporous composites of MCM-41 and CuO in the CO2 photoreduction process. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Journal of Photochemistry & Photobiology, A: Chemistry, v. 439, 114631, 2023. |
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ISSN: |
1010-6030 |
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DOI: |
https://doi.org/10.1016/j.jphotochem.2023.114631 |
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Idioma: |
Inglês |
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Conteúdo: |
The conversion of CO2 into valuable chemical feedstock through photocatalysis is considered an effective strategy to mitigate global warming and energy supply problems. Among the challenges for CO2 photoreduction are the design and synthesis of active photocatalysts with high affinity for the CO2 molecule and suitable reduction potentials of valence and conduction bands to promote the reduction of the CO2 molecule. Molecular sieves (MCM-41) with semiconductors, such as copper oxide, are alternatives to the traditional semiconductors (TiO2 and ZnO) with high CO2 adsorption capacity, high specific surface area, and good stability, making them perfect candidates for photocatalysis. Therefore, in this work, mesoporous composite materials based on MCM-41 and CuO were synthesized via the impregnation method. The synthesized materials were chemically, structurally, and morphologically characterized by XRD, SEM, FTIR, XPS, DRS, N2 adsorption and desorption, and atomic absorption spectroscopy techniques, and the photocatalytic activity in the reduction of CO2 was evaluated under visible radiation. We show that MCM-41 and the composite MCM-41/CuO have significant potential for use in the CO2 photoreduction process, where the composition and different active sites in the photocatalysts play an important role in the activity and selectivity of the products formed. The results showed that the MCM-41 and the composite with 1 % (w/w%) CuO presented high selectivity and production of methanol, with 585.88 and 267.05 μmol.gcatalyst -1 , respectively. Thus, the findings demonstrated the versatility of the MCM-41 to form composites with semiconductors, as well as the need to comprehend the main aspects that influence CO2 photoreduction activities and the selectivity of the composites, including their surface, structural, and electrical features. MenosThe conversion of CO2 into valuable chemical feedstock through photocatalysis is considered an effective strategy to mitigate global warming and energy supply problems. Among the challenges for CO2 photoreduction are the design and synthesis of active photocatalysts with high affinity for the CO2 molecule and suitable reduction potentials of valence and conduction bands to promote the reduction of the CO2 molecule. Molecular sieves (MCM-41) with semiconductors, such as copper oxide, are alternatives to the traditional semiconductors (TiO2 and ZnO) with high CO2 adsorption capacity, high specific surface area, and good stability, making them perfect candidates for photocatalysis. Therefore, in this work, mesoporous composite materials based on MCM-41 and CuO were synthesized via the impregnation method. The synthesized materials were chemically, structurally, and morphologically characterized by XRD, SEM, FTIR, XPS, DRS, N2 adsorption and desorption, and atomic absorption spectroscopy techniques, and the photocatalytic activity in the reduction of CO2 was evaluated under visible radiation. We show that MCM-41 and the composite MCM-41/CuO have significant potential for use in the CO2 photoreduction process, where the composition and different active sites in the photocatalysts play an important role in the activity and selectivity of the products formed. The results showed that the MCM-41 and the composite with 1 % (w/w%) CuO presented high selectivity and production of methan... Mostrar Tudo |
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Palavras-Chave: |
Artificial photosynthesis; CO2 photoreduction; Mechanism; Molecular sieves. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02825naa a2200301 a 4500
001 2153292
005 2023-04-20
008 2023 bl uuuu u00u1 u #d
022 $a1010-6030
024 7 $ahttps://doi.org/10.1016/j.jphotochem.2023.114631$2DOI
100 1 $aGEOVO, J. D. C.
245 $aEvaluation of the activity and selectivity of mesoporous composites of MCM-41 and CuO in the CO2 photoreduction process.$h[electronic resource]
260 $c2023
520 $aThe conversion of CO2 into valuable chemical feedstock through photocatalysis is considered an effective strategy to mitigate global warming and energy supply problems. Among the challenges for CO2 photoreduction are the design and synthesis of active photocatalysts with high affinity for the CO2 molecule and suitable reduction potentials of valence and conduction bands to promote the reduction of the CO2 molecule. Molecular sieves (MCM-41) with semiconductors, such as copper oxide, are alternatives to the traditional semiconductors (TiO2 and ZnO) with high CO2 adsorption capacity, high specific surface area, and good stability, making them perfect candidates for photocatalysis. Therefore, in this work, mesoporous composite materials based on MCM-41 and CuO were synthesized via the impregnation method. The synthesized materials were chemically, structurally, and morphologically characterized by XRD, SEM, FTIR, XPS, DRS, N2 adsorption and desorption, and atomic absorption spectroscopy techniques, and the photocatalytic activity in the reduction of CO2 was evaluated under visible radiation. We show that MCM-41 and the composite MCM-41/CuO have significant potential for use in the CO2 photoreduction process, where the composition and different active sites in the photocatalysts play an important role in the activity and selectivity of the products formed. The results showed that the MCM-41 and the composite with 1 % (w/w%) CuO presented high selectivity and production of methanol, with 585.88 and 267.05 μmol.gcatalyst -1 , respectively. Thus, the findings demonstrated the versatility of the MCM-41 to form composites with semiconductors, as well as the need to comprehend the main aspects that influence CO2 photoreduction activities and the selectivity of the composites, including their surface, structural, and electrical features.
653 $aArtificial photosynthesis
653 $aCO2 photoreduction
653 $aMechanism
653 $aMolecular sieves
700 1 $aTORRES, J. A.
700 1 $aGIROTO, A. S.
700 1 $aROCHA, F. C. N.
700 1 $aGARCIA, M. M.
700 1 $aSILVA, G. T. S. T.
700 1 $aSOUZA, J. R. C.
700 1 $aOLIVEIRA, J. A. de
700 1 $aRIBEIRO, C.
700 1 $aNOGUEIRA, A. E.
773 $tJournal of Photochemistry & Photobiology, A: Chemistry$gv. 439, 114631, 2023.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
21/11/2019 |
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Data da última atualização: |
21/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
BAUERMEISTER, A.; CALIL, F. A.; PINTO, F. das C. L.; MEDEIROS, T. C. de T.; ALMEIDA, L. C. de; SILVA, L. J. da; MELO, I. S. de; ZUCCHI, T. D.; COSTA-LOTUFO, L. V.; MORAES, L. A. B. |
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Afiliação: |
ANELIZE BAUERMEISTER, FFCLRP-USP; FELIPE ANTUNES CALIL, FFCLRP-USP; FRANCISCO DAS CHAGAS LIMA PINTO, UFC; TALITA CARLA DE TRALIA MEDEIROS, FFCLRP-USP; LARISSA COSTA DE ALMEIDA, ICB-USP; LEONARDO JOSE DA SILVA, ESALQ-USP; ITAMAR SOARES DE MELO, CNPMA; TIAGO DOMINGUES ZUCCHI, Agrivalle; LETICIA VERAS COSTA-LOTUFO, ICB-USP; LUIZ ALBERTO BERALDO DE MORAES, FFCLRP-USP. |
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Título: |
Pradimicin-IRD from Amycolatopsis sp. IRD-009 and its antimicrobial and cytotoxic activities. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Natural Product Research, v. 33, n. 12, p. 1713-1720, 2019. |
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ISSN: |
1478-6419 |
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DOI: |
https://doi.org/10.1080/14786419.2018.1434639 |
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Idioma: |
Inglês |
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Conteúdo: |
A new polycyclic antibiotic, pradimicin-IRD, was isolated from actinobacteria Amycolatopsis sp. IRD-009 recovered from soil of Brazilian rainforest undergoing restoration area. This molecule is the major compound produced in solid culture media. The new compound was detected by a focused method of precursor ion (high-performance liquid chromatography coupled to tandem mass spectrometer) developed previously to identify unusual aminoglycosyl sugar moieties. The compound was isolated and its structure was, therefore, elucidated by high-resolution mass spectrometry, and 1D and 2D nuclear magnetic resonance experiments. Pradimicin- IRD displayed potential antimicrobial activity against Streptococcus agalactiae (MIC 3.1 μg/mL), Pseudomonas aeruginosa (MIC 3.1 μg/ mL) and Staphylococcus aureus (MIC 3.1 μg/mL), and also cytotoxicity against tumour and non-tumour cell lines with IC 50 values ranging from 0.8 μM in HCT-116 colon carcinoma cells to 2.7 μM in MM 200 melanoma cells. Particularly, these biological properties are described for the first time for this chemical class. |
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Palavras-Chave: |
Antimicrobial properties. |
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Thesagro: |
Antibiótico; Bactéria. |
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Thesaurus NAL: |
Actinobacteria; Amycolatopsis; Antibiotics. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 02089naa a2200325 a 4500
001 2114827
005 2019-11-21
008 2019 bl uuuu u00u1 u #d
022 $a1478-6419
024 7 $ahttps://doi.org/10.1080/14786419.2018.1434639$2DOI
100 1 $aBAUERMEISTER, A.
245 $aPradimicin-IRD from Amycolatopsis sp. IRD-009 and its antimicrobial and cytotoxic activities.$h[electronic resource]
260 $c2019
520 $aA new polycyclic antibiotic, pradimicin-IRD, was isolated from actinobacteria Amycolatopsis sp. IRD-009 recovered from soil of Brazilian rainforest undergoing restoration area. This molecule is the major compound produced in solid culture media. The new compound was detected by a focused method of precursor ion (high-performance liquid chromatography coupled to tandem mass spectrometer) developed previously to identify unusual aminoglycosyl sugar moieties. The compound was isolated and its structure was, therefore, elucidated by high-resolution mass spectrometry, and 1D and 2D nuclear magnetic resonance experiments. Pradimicin- IRD displayed potential antimicrobial activity against Streptococcus agalactiae (MIC 3.1 μg/mL), Pseudomonas aeruginosa (MIC 3.1 μg/ mL) and Staphylococcus aureus (MIC 3.1 μg/mL), and also cytotoxicity against tumour and non-tumour cell lines with IC 50 values ranging from 0.8 μM in HCT-116 colon carcinoma cells to 2.7 μM in MM 200 melanoma cells. Particularly, these biological properties are described for the first time for this chemical class.
650 $aActinobacteria
650 $aAmycolatopsis
650 $aAntibiotics
650 $aAntibiótico
650 $aBactéria
653 $aAntimicrobial properties
700 1 $aCALIL, F. A.
700 1 $aPINTO, F. das C. L.
700 1 $aMEDEIROS, T. C. de T.
700 1 $aALMEIDA, L. C. de
700 1 $aSILVA, L. J. da
700 1 $aMELO, I. S. de
700 1 $aZUCCHI, T. D.
700 1 $aCOSTA-LOTUFO, L. V.
700 1 $aMORAES, L. A. B.
773 $tNatural Product Research$gv. 33, n. 12, p. 1713-1720, 2019.
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