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

作者：Gonzalez Garcia P^*; Arenas Esteban D; Avila Brande D^*; Urones Garrote E; Otero Diaz L C

来源：Journal of Colloid and Interface Science, 2017, 490: 410-419.

DOI：10.1016/j.jcis.2016.11.034

• Microporous carbon nanomaterials
• Nickel oxide-carbon nanocomposite

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 degrees 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 (I-D/I-G) 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 sp(2) carbon bonding content higher than 95% and mass density in the range of 1.0-1.6g/cm(3). Textural studies show Type I adsorption isotherms with surface area of 922 m(2)/g for the sample produced at 900 degrees C. In addition, the basic hydrothermal treatment of the sample chlorinated at 600 degrees C yields a composite material with NiO nanoparticles well dispersed within the carbon matrix.

• 出版日期2017-3-15