Nickelocene as precursor of microporous organometallic-derived carbon and nickel oxide-carbon nanocomposite

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• 作者：P. Gonzá ; lez-Garcí ; a^a ; ^{pedro.gonzalez@cidesi.edu.mx} ; D. Arenas-Esteban^b ; D. Á ; vila-Brande^b ; ^{davilabr@ucm.es} ; E. Urones-Garrote^c ; L.C. Otero-Dí ; az^b
• 关键词：Microporous carbon nanomaterials ; Nickel oxide&ndash ; carbon nanocomposite
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：490
• 期：Complete
• 页码：410-419
• 全文大小：4532 K
• 卷排序：490

文摘

Microporous flower-like and spherical carbon particles, made of graphene-like layers, have been obtained via chlorination of nickelocene (Ni(C5H5)2). Their mechanism of formation, in terms of morphology and micro-nanostructure, has been followed from 200 to 900 °C. Conventional transmission electron microscopy and high-resolution-TEM observations allow determining that their structure is made of highly disordered graphene-like layers. The Raman spectrum of the high temperature sample exhibits the characteristics D and G bands. The peak positions, the ratio of their intensities (ID/IG) and full width at half maximum suggest a high degree of disorder in the nanostructures. The calculated in-plane correlation length of these graphene-like layers is 1.15 nm. In all the carbon particles, electron energy-loss spectroscopy shows sp2 carbon bonding content higher than 95% and mass density in the range of 1.0–1.6g/cm3. Textural studies show Type I adsorption isotherms with surface area of 922 m2/g for the sample produced at 900 °C. In addition, the basic hydrothermal treatment of the sample chlorinated at 600 °C yields a composite material with NiO nanoparticles well dispersed within the carbon matrix.