Síntese, caracterização e estudo das propriedades catalíticas e magnéticas de nanopartículas de Ni dispersas em matriz mesoporosa de SiO2

Química Nova

Neftalí L. V. Carreño²  Edson R. Leite²  Luís P. S. Santos²  Paulo N. Lisboa-filho²  Elson Longo²  Geórgia C. L. Araújo¹  Andersson Barison¹  Antônio G. Ferreira¹  Antoninho Valentini¹  Luiz Fernando D. Probst¹ 

[1] ,Universidade Federal de São Carlos Centro Multidisciplinar de Desenvolvimento de Materiais Cerâmicos São Carlos SP

关键词: nanoparticles;    catalyst;    magnetism;   

DOI  :  10.1590/S0100-40422002000600010

来源: SciELO

【 摘 要 】

Nickel nanoparticles supported on amorphous silica ceramic matrix were synthesized by the polymeric precursor method. The nanostructure was characterized by NMR, BET, XRD, SEM, TEM, and flame atomic absorption spectrometry techniques. It was observed a dependence of the crystallite size on the thermal annealing, under a N2 atmosphere. The materials presented a high catalytic activity and selectivity upon the beta-pinene hydrogenation reaction. The magnetic hystereses were also correlated with the morphology of the processed material.

【 授权许可】

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