Synthesis of Thermally Stable h-BN-CNT Hetero-Structures via Microwave Heating of Ethylene under Nickel, Iron, and Silver Catalysts

Initially, three samples of carbon nanotubes (SWCNTs) were synthesized from neem tree material. Afterward, these samples were coated with hexagonal boron nitride (h-BN) to form h-BN and CNT composite (h-BN-CNT). The essence of using h-BN (being a perfect insulator) with armchair SWCNT (being a condu...

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Published inCrystals (Basel) Vol. 11; no. 9; p. 1097
Main Authors Itas, Yahaya Saadu, Ndikilar, Chifu E., Zangina, Tasiu, Hafeez, Hafeez Yusuf, Safana, A. A., Khandaker, Mayeen Uddin, Ahmad, Pervaiz, Abdullahi, Ismail, Olawumi, Badmus Kausara, Babaji, Muhammad Auwal, Osman, Hamid, Alamri, Sultan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2021
Subjects
Approximation
Boron
Boron nitride
Carbon
Coffee
Conductors
DFT
Electronic devices
Electronic properties
Energy gap
exchange-correlations
Excitons
Graphene
h-BN-CNT heterostructure
Heterostructures
Iron
Laboratories
Morphology
Nanoparticles
Nickel
Scanning electron microscopy
Semiconductors
Silver
Single wall carbon nanotubes
Spectrum analysis
synthesis
Thermal conductivity
Thermal stability
thermogravimetry
Transition metals
China
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Summary:Initially, three samples of carbon nanotubes (SWCNTs) were synthesized from neem tree material. Afterward, these samples were coated with hexagonal boron nitride (h-BN) to form h-BN and CNT composite (h-BN-CNT). The essence of using h-BN (being a perfect insulator) with armchair SWCNT (being a conductor) is to create an interface between an insulator and conductor. The samples were treated under three different transition metal nanoparticles; silver, iron, and nickel. Thermogravimetric (TGA) analysis reveals that h-BN/CNT is thermally more stable with silver than iron and nickel nanoparticles. TGA profile showed resistance to mass loss at the beginning due to the higher thermal resistivity by the impurity compounds. The DFT calculation, generalized gradient approximation (GGA), and Perdew–Burke–Ernzerhof (PBE) analysis found engineered bandgap energy of 3.4 eV for the synthesized h-BN-CNT heterostructure. Because of its unique structural and electronic properties such as tunable bandgaps, the h-BN-CNT heterostructure may open new ways for manipulating excitons in the CNTs, and thus can be explored to develop various new electronic devices.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst11091097