☆ 4.7 Article

Fabrication of Multi-Vacancy-Defect MWCNTs by the Removal of Metal Oxide Nanoparticles

POLYMERS (2022)

Journal

POLYMERS

Volume 14, Issue 14, Pages -

Publisher

MDPI

DOI: 10.3390/polym14142942

Keywords

multi-walled carbon nanotubes; metal oxide NPs; multi-vacancy-defect

Funding

National Research Foundation of Korea [2019R1C1C1009427]
Technology Innovation Program - Ministry of Trade, Industry and Energy (MOTIE, Korea) [20015991]
GRRC program of Gyeonggi province [GRRC 2020-B03]
NNFC [1711160154]
Korea Evaluation Institute of Industrial Technology (KEIT) [20015991] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
National Research Foundation of Korea [2019R1C1C1009427] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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Abstract

This study aims to increase the specific surface area of multi-walled carbon nanotubes (MWCNTs) by forming and removing metal oxide nanoparticles on their surfaces. Facile methods were used for particle formation and removal, and the resulting structures and crystallinity of the metal oxide particles were characterized. Surface area analysis and Raman spectroscopy were used to determine defect formation and the impact of different metals. The results showed an increase in surface area after removing the metal oxide particles, and the metal that induced the highest surface area was identified.

This study aims to increase the specific surface area of multi-walled carbon nanotubes (MWCNTs) by forming and subsequently removing various metal oxide nanoparticles on them. We used facile methods, such as forming the particles without using a vacuum or gas and removing these particles through simple acid treatment. The shapes of the composite structures on which the metal oxide particles were formed and the formation of multi-vacancy-defect MWCNTs were confirmed via transmission electron microscopy and scanning electron microscopy. The crystallinity of the formed metal oxide particles was confirmed using X-ray diffraction analysis. Through specific surface area analysis and Raman spectroscopy, the number of defects formed and the degree and tendency of defect-formation in each metal were determined. In all the cases where the metal oxide particles were removed, the specific surface area increased, and the metal inducing the highest specific surface area was determined.

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Functionalized multi-walled carbon nanotubes for oil spill cleanup from water

Thamer Adnan Abdullah, Tatjana Juzsakova, Sanaa A. Hafad, Rashed Taleb Rasheed, Noor Al-Jammal, Muhammad Ali Mallah, Ali Dawood Salman, P. C. Le, Endre Domokos, Mustafa Aldulaimi

Summary: The growing global economy has led to an increase in transportation and oil exploitation, resulting in oil spillage as a serious threat to aquatic and terrestrial ecosystems. Water purification has become a major challenge worldwide. Traditional adsorbents for oil removal have drawbacks, leading research efforts to focus on finding adsorbents with improved oil adsorption capabilities, such as nano-adsorbents like multi-walled carbon nanotubes.

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