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Metal/carbon nanohybrids: from laser chemistry to nanochemistry

AuthorsSeral-Ascaso, Andrés
AdvisorMuñoz, Edgar
KeywordsHybrid nanomaterial
Carbon materials
Laser synthesis
Carbon foams
Issue Date24-May-2013
PublisherUniversidad de Zaragoza
CSIC - Instituto de Carboquímica (ICB)
AbstractThis PhD Thesis addresses the tailored synthesis of metal/carbon hybrid nanomaterials from a novel “laser chemistry” approach, based on the idea that the composition and structure of the synthesized materials can be tuned by selecting the laser irradiation parameters and the chemical composition of the ablated coordination compounds. The work presented here is mainly focused on the synthesis of metal/carbon foams, which consist of metal nanoparticles embedded in nanocarbon matrices which comprise both graphitic nanostructures and amorphous carbon. By selecting the ablated ligands and laser parameters used (such as irradiance, and laser operation mode -continuous wave or pulsed mode-) this versatile “laser chemistry” method enables tailoring the metal loading, and nanoparticle size and composition, as well as the structure of the produced carbon matrices. Moreover, metal-free carbon foams have been also synthesized by this laser technique. This work also discusses on the physicochemical properties (textural-, magnetic-, and electrochemical properties), and processing of the produced nanostructured materials, as well as on the mechanisms involved in plasma- assisted high temperature assembly of carbon- and metal building blocks toward the growth of the synthesized nanomaterials. Alternatively to this “laser chemistry” method, a chemical route for the gold nanoparticle decoration of metal-free carbon foams and other carbon materials (including carbon nanotubes, graphene oxide, carbon black, ordered mesoporous carbon and nanodiamond) has been developed and the resulting gold/carbon nanohybrids provided a remarkable catalyst performance in hydroamination reactions. Finally, this GNP decoration process has been extended to bidimensional inorganic layered materials: tungsten (IV) sulfide and montmorillonite, a pillared clay.
Description273 páginas.-- Tesis Doctoral presentada para la obtención del Grado de Doctor en Cincias Químicas en la Universidad de Zaragoza.
Appears in Collections:(ICB) Tesis
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