Details

Autor(en) / Beteiligte

• Xing, Baoyan
• Zhao, Jianguo
• Ren, Yunpeng
• Pan, Qiliang
• Song, Jie
• Han, Peide
• Ma, Guibin

Titel

Hybrid composite materials generated via growth of carbon nanotubes in expanded graphite pores using a microwave technique

Ist Teil von

• Inorganic chemistry communications, 2022-03, Vol.137, p.109185, Article 109185

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• One pot synthesis of hybrid carbon nanotubes/expanded graphite composites was conducted by mixing all solid precursors of nickel nitrate, naphthalene and expanded graphite in optimized ratios by microwave reaction. This synthesized hybrid composites have been prepared via a solid-gas growth mechanism showing novel physical properties and potential applications. [Display omitted] •A hybrid material of carbon nanotubes/expanded graphite composite was synthesized using a microwave reaction.•The synthesis conditions for the selected precursors of nickel catalysts and naphthalene and for the reaction time were optimized.•The composites were fully characterized and show novel physical properties.•A solid-gas growth mechanism is proposed and discussed in detail. Herein we demonstrate a facile in-situ synthesis method by selection of expanded graphite as a matrix growth microreactor, nickel nitrate (Ni(NO3)2) as a growth catalyst and naphthalene as a carbon source, assisted by a conventional household microwave oven. Affection parameters related to control of the growth process, such as the microwave heating time, catalyst concentration and carbon source concentration. The optimized experimental conditions that exhibit excellent microstructure were: a carbon source concentration of 20.0 mg/ml, a catalyst concentration of 10.0 mg/ml and a microwave reaction time of 30 s. The microstructure of the synthesized composites was investigated and a solid-gas growth mechanism with this carbon source precursor is proposed. The micro morphology, formed CNT structure and resistivity of the composites are fully characterized and analyzed by thermal field emission high-resolution scanning electron microscopy (FESEM), confocal laser Raman spectrometer (Raman) and a four-point probe resistivity meter. All characterization data show a uniform CNT diameter distribution of approximately 30.0 nm with a low resistivity of the composites (1.12 × 10−5 Ω·m), indicating uniform hybrid composite material formation with novel physical properties.