Study of palladium nanoparticles prepared from water-in-oil microemulsion

Chen, Meng; Feng, Yusheng; Wang, Liying; Zhang, Lu; Zhang, Junyan

doi:10.1016/j.colsurfa.2006.02.024

Cited by 27 publications

(13 citation statements)

References 34 publications

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“…In the latter case, smaller particles were obtained because the thiols interacted with the Pd before the reduction, providing a driving force against particle growth. It has been reported that, different from Au, in Pd, the addition of thiols before the reducing agent may promote the formation of polymeric complexes with a [Pd(SR) 2 ] n structure [42] in which the Pd is in the reduced form but not aggregated in particles. In our study, nanoparticles were observed in the TEM images of the unsupported Pd samples (Fig.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Pd nanoparticles embedded in sponge-like porous silica as a Suzuki–Miyaura catalyst: Similarities and differences with homogeneous catalysts

Budroni

Corma

Garcı́a

et al. 2007

Journal of Catalysis

101

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Section: Catalyst Preparationmentioning

confidence: 99%

Pd nanoparticles embedded in sponge-like porous silica as a Suzuki–Miyaura catalyst: Similarities and differences with homogeneous catalysts

Budroni

Corma

Garcı́a

et al. 2007

Journal of Catalysis

101

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“…Using N 2 H 4 as a reducing agent, larger nanoparticles and a broader size ranges (6-13 nm) were obtained compared to NaBH 4 (3.9-5 nm). Although reducing agent plays an important role in the size of the metal nanoparticles formed, Chen et al [13] reported on the formation of similar Pd nanoparticle size when N 2 H 4 or NaBH 4 was used as a reducing agent, thus indicating the contribution of other factors. Thus Perez-Coronado et al [14] synthetized Pd nanoparticles by a water-in-oil (w/o) microemulsion method using the water/ AOT/isooctane system.…”

Section: Synthesis Of the Metal Nanoparticles From The Microemulsion mentioning

confidence: 99%

Preparation of Highly Dispersed Pd-Supported Catalysts for Hydrogenation Processes by Microemulsion Method

Patera¹,

Paterová²,

Krupka³

et al. 2018

Noble and Precious Metals - Properties, Nanoscale Effects and Applications

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Preparation of nano-dispersed palladium particles on alumina support is described here using reverse microemulsion (water-in-oil) method. This synthesis protocol leads to a narrow Pd particle size distribution with particles of average size, which were significantly smaller compared to those prepared by classical impregnation method. It is shown that the particle size could be effectively controlled both by the microemulsion chemical composition such as concentration of PdCl 2 and the water/surfactant molar ratio and by the catalyst reduction process. Under the optimal reaction conditions, a Pd/Al 2 O 3 catalyst with a homogeneous distribution of Pd particles of average size ~2.2 nm was obtained.

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“…Os trabalhos existentes em geral não relacionam diferentes combustíveis entre si (Brahmachari et al, 2010;Chen et al, 2006;Corgozinho, 2009;Cotta et al, 2009;Divya e Mishra, 2007;Eliáš et al, 2013;Fanetti et al, 2011;Guimarães et al, 2008;Hiraoka e Hamill, 1973;Lechel et al, 2010;Litani-Barzilai et al, 1997;Magri et al, 2009;Martins, 2001;Mutai et al, 2002;Oliveira et al, 2011;Pantoja, 2010;Schwarz e Wasik, 1976;Yamagushi e Higashi, 1990). …”

Section: Introductionunclassified

Importância Das Moléculas Aromáticas Na Fluorescência Dos Combustíveis

Nacimento¹,

Teixeira²,

Pereira³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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RESUMO -Atualmente, a Agência Nacional de Petróleo, Gás Natural e Biocombustíveis (ANP) estabelece a obrigatoriedade de adição de marcadores a determinados derivados de petróleo. Entretanto, estes marcadores são importados e pesquisas vêm sendo desenvolvidas para obtenção de marcadores nacionais competitivos, o que caracteriza uma importante área da Engenharia de Materiais. Certas propostas de marcadores nacionais são baseadas em marcadores coloridos decorrentes do fenômeno de fluorescência. O objetivo deste trabalho foi estudar as propriedades ópticas de fluorescência dos principais combustíveis derivados de petróleo, por estes serem os solventes em que os marcadores podem ser aplicados. Contudo, os combustíveis fósseis são resultantes de frações do petróleo que contém misturas de moléculas orgânicas alifáticas, aromáticas e compostos de enxofre, oxigênio e nitrogênio. Percebeu-se que os hidrocarbonetos alifáticos, que representam a maior parte desses líquidos e são tão importantes para a combustão, não possuem fluorescência intrínseca, como esperado pela literatura. Já as moléculas aromáticas, presentes em menor quantidade nos combustíveis e muitas vezes tratadas como impurezas, possuem fluorescência na região da luz visível. Desvendar quais as principais moléculas aromáticas responsáveis pela fluorescência de cada combustível é um desafio, considerando-se a alta complexidade dessas misturas orgânicas.

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Study of palladium nanoparticles prepared from water-in-oil microemulsion

Cited by 27 publications

References 34 publications

Pd nanoparticles embedded in sponge-like porous silica as a Suzuki–Miyaura catalyst: Similarities and differences with homogeneous catalysts

Pd nanoparticles embedded in sponge-like porous silica as a Suzuki–Miyaura catalyst: Similarities and differences with homogeneous catalysts

Preparation of Highly Dispersed Pd-Supported Catalysts for Hydrogenation Processes by Microemulsion Method

Importância Das Moléculas Aromáticas Na Fluorescência Dos Combustíveis

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