Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
Filtros adicionais











Intervalo de ano
1.
Nanoscale Res Lett ; 13(1): 50, 2018 Feb 13.
Artigo em Inglês | MEDLINE | ID: mdl-29435743

RESUMO

Usually, we must use an appropriate support material to keep the metal species stable and finely dispersed as supported metal nanoparticles for industry application. Therefore, the choice of support material is a key factor in determining the dispersion and particle size of the noble metal species. Here, we report the synthesis of a single-atom Pt material in the solution and supported Pt nanoclusters on microporous La2O3 by a one-step acoustic levitation method without any pretreatment/modification of raw oxide. We have strongly contributed to the synthetic methodology of the surface/interfacial heterogeneous catalysts in this study, and this finding could open another door for synthesis of supported metal nanoparticles on porous materials for environmental catalysis.

2.
Chemistry ; 22(26): 8864-71, 2016 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-27164001

RESUMO

Uniform multishelled NiO, Co3 O4 , ZnO, and Au@NiO hollow spheres were synthesized (NiO and Co3 O4 hollow spheres for the first time) by a simple shell-by-shell self-assembly allowing for tuning of the the size, thickness and shell numbers by controlling the heat treatment, glucose/metal salt molar ratio, and hydrothermal reaction time. These findings further the development of synthetic methodologies for multishelled hollow structures and could open up new opportunities for deeper understanding of the mechanisms of shell-by-shell self-assembly. Moreover, the double-shelled NiO hollow sphere exhibits a higher photocatalytic activity for degradation of methyl orange than its morphological counterparts.


Assuntos
Cobalto/química , Níquel/química , Óxidos/química , Óxido de Zinco/química , Compostos Azo/química , Catálise , Microscopia Eletrônica de Transmissão e Varredura , Fotólise/efeitos da radiação , Raios Ultravioleta
3.
J Nanosci Nanotechnol ; 14(8): 6016-21, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25936048

RESUMO

The ordered mesoporous carbon (OMC)/paraffin composites were successfully prepared by a facile physical mixing method and an EMI SE of 21-23 dB was achieved at the OMC loading of 5.69 wt.% in the X band. This indicates that the composites are very suitable for an application as effective and lightweight EMI shielding materials. The EMI shielding of the composite shows an absorption-dominant mechanism, i.e., a contribution shift from reflection to absorption is observed with the increase in OMC loading and frequency. This could be explained by the intrinsic properties (electrical conductivity, complex permittivity and potential large defects) and novel structure of the composites.

4.
Materials (Basel) ; 6(4): 1520-1529, 2013 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-28809225

RESUMO

A novel kind of α-Fe2O3-filled ordered mesoporous carbon nanorods has been synthesized by a facial hydrothermal method. Compared with dendritic α-Fe2O3 micropines, both a broader effective absorption range-from 10.5 GHz to 16.5 GHz with reflection loss (RL) less than -10 dB-and a thinner matching thickness of 2.0 mm have been achieved in the frequency range 2-18 GHz. The enhanced microwave absorption properties evaluated by the RL are attributed to the enhanced dielectric loss resulting from the intrinsic physical properties and special structures.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA