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Tipo de ReferênciaJournal Article
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/3SG472L
Repositóriosid.inpe.br/mtc-m21c/2019/01.03.10.51   (acesso restrito)
Última Atualização2019:01.03.10.51.44 administrator
Metadadossid.inpe.br/mtc-m21c/2019/01.03.10.51.44
Última Atualização dos Metadados2020:01.06.11.42.07 administrator
DOI10.1016/j.ceramint.2018.11.027
ISSN0272-8842
Chave de CitaçãoMoraesBSSMCTR:2019:EfCaCo
TítuloSynthesis of novel ZnO/carbon xerogel composites: Effect of carbon content and calcination temperature on their structural and photocatalytic properties
Ano2019
MêsFeb.
Data de Acesso17 abr. 2021
Tipo de Trabalhojournal article
Número de Arquivos1
Tamanho3055 KiB
Área de contextualização
Autor1 Moraes, Nicolas Perciani
2 Bacetto, Letícia Araujo
3 Santos, Gabriela Spirandelli dos
4 Silva, Maria Lucia Caetano Pinto da
5 Machado, João Paulo Barros
6 Campos, Tiago Moreira Bastos
7 Thim, Gilmar Patrocínio
8 Rodrigues, Liana Alvares
Identificador de Curriculo1
2
3
4
5 8JMKD3MGP5W/3C9JHER
Grupo1
2
3
4
5 LABAS-COCTE-INPE-MCTIC-GOV-BR
Afiliação1 Universidade de São Paulo (USP)
2 Universidade de São Paulo (USP)
3 Universidade de São Paulo (USP)
4 Universidade de São Paulo (USP)
5 Instituto Nacional de Pesquisas Espaciais (INPE)
6 Instituto Tecnológico de Aeronáutica (ITA)
7 Instituto Tecnológico de Aeronáutica (ITA)
8 Universidade de São Paulo (USP)
Endereço de e-Mail do Autor1
2
3
4
5 joao.machado@inpe.br
6
7
8 liana.r@usp.br
RevistaCeramics International
Volume45
Número3
Páginas3657-3667
Tipo SecundárioPRE PI
Nota SecundáriaA1_INTERDISCIPLINAR A1_ENGENHARIAS_III A1_ENGENHARIAS_II A1_ENGENHARIAS_I A2_MATERIAIS A2_ENGENHARIAS_IV A2_CIÊNCIAS_AGRÁRIAS_I B1_GEOCIÊNCIAS B1_ARQUITETURA_E_URBANISMO B2_QUÍMICA B2_ODONTOLOGIA B2_ENSINO B2_BIOTECNOLOGIA B3_ASTRONOMIA_/_FÍSICA B5_CIÊNCIAS_AMBIENTAIS
Histórico2019-01-03 10:52:47 :: simone :: 2018 -> 2019
2019-01-03 10:52:47 :: simone -> administrator :: 2019
2020-01-06 11:42:07 :: administrator -> simone :: 2019
Área de conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteudoExternal Contribution
Tipo de Versãopublisher
Palavras-ChaveZinc oxide, Photocatalysis, Carbon xerogel, Tannin, Methylene blue.
ResumoThis paper reports the development of new ZnO/carbon xerogel composites (XZn w) for photocatalytic applications. The use of black wattle tannin as a precursor to the carbon xerogel aimed at reducing costs and environmental impacts. The composites were characterized by diffuse reflectance spectroscopy (DRS), BET surface area, scanning electron microscopy (FEG-SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), infrared spectroscopy (IR), and X-ray diffraction (XRD). The photocatalytic performance of the materials was evaluated in the decomposition process of methylene blue, a known toxic pollutant. The impacts of the catalyst dosage and calcination temperature on the photocatalytic process were also examined systematically. The X-ray profiles of the XZn w evidenced the existence of the hexagonal structure of the zinc oxide (wurtzite) in the composites. The XPS and XRD analyses confirmed the incorporation of carbon in the zinc oxide crystalline structure. The higher carbon content resulted in a larger surface area. All composites presented the ability to absorb radiation in less energetic wavelengths, contrary to pure zinc oxide that only absorbs radiation of wavelengths below 420 nm. The optimal dosage and calcination temperature were found to be 0.2 g L−1 and 300 °C. All the developed composites displayed significant photocatalytic activities in the decomposition of methylene blue under both visible and solar light. The composites had superior photocatalytic efficiency under visible light when compared to pure zinc oxide. The XZn 0.5 presented the best degradation efficiency under visible radiation. All materials presented similar photocatalytic responses under solar light, evidencing the synergy between the carbon xerogel and the zinc oxide. The photocatalytic mechanism was evaluated by trapping experiments to be mainly controlled by the electron vacancies that are generated during the photoexcitation of the composites.
AreaFISMAT
ArranjoSynthesis of novel...
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Permissão de Leituradeny from all and allow from 150.163
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DivulgaçãoWEBSCI; PORTALCAPES; COMPENDEX.
Acervo Hospedeirourlib.net/www/2017/11.22.19.04
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