Repositorio UFRO · Omeka S

Carbon nanotube production from algal biochar using microwave irradiation technology

Primer Autor	Hidalgo, Pamela
Co-autores	Navia, Rodrigo Hunter, Renato Camus, Carolina Buschmann, Alejandro Echeverria, Ana
Título	Carbon nanotube production from algal biochar using microwave irradiation technology
Editorial	ELSEVIER
Revista	JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Lenguaje	en
Resumen	In this study, we evaluated the transformation of algal-based biochar into carbon nanotubes by irradiation in a microwave oven at low energies (100-300 W). Three species of algae (Macrocystis pyrifera, Sarcothalia crispata, and Scenedesmus almeriensis) were selected and pyrolyzed to obtain biochar for carbon nanotubes (CNTs) growth in the presence of ferrocene as the catalyst. The CNTs obtained were characterized by dynamic light scattering, UV-VIS spectroscopy, Raman spectroscopy, transmission electron microscopy, X-ray diffraction, and electrical conductivity. The results indicate that algal biochar can be used for CNT growth. The heterogeneous structure of algal biochar can initiate the graphitization process for the formation of CNTs. The characteristics of synthesized CNTs vary with the biochar source used as a precursor. Thus, both the degree of graphitization of the wall and the content of nanotubes were higher using biochar with higher carbon content (from microalga Scenedesmus almeriensis), otherwise, the hydrodynamic diameter and electrical conductivity were higher using biochar with upper mineral ash content (from microalga Macrocystis pyrifera). Furthermore, it was found that a low catalyst concentration was required to promote growth due to the reactivity of the mineral ash of the biochar, and it was demonstrated that microwave heating conditions, such as microwave power and temperature, lead to variations in the optical properties of CNTs, such as the band gap energy, CNTs content, and measurement of the size such as the hydrodynamic diameter.
Fecha Publicación	2023
Tipo de Recurso	artículo original
doi	10.1016/j.jaap.2023.106017
Formato Recurso	PDF
Palabras Claves	Biochar Microalgae Macroalgae Carbon nanotubes Microwave irradiation
Ubicación del archivo	http://dx.doi.org/10.1016/j.jaap.2023.106017
Categoría OCDE	Química Energía y Combustibles Ingeniería
Materias	biocarbón Microalgas macroalgas Nanotubos de carbon Irradiación por microondas
Identificador del recurso (Mandatado-único)	artículo original
Versión del recurso (Recomendado-único)	versión publicada
Derechos de acceso	metadata
Access Rights	metadata
Id de Web of Science	WOS:001013089100001
ISSN	0165-2370
Tipo de ruta	hibrida
Categoría WOS	Química Energía y Combustibles Ingeniería