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Chemically Modified Multi-walled Carbon
Nanotubes (MWCNTs) with
Anchored Acidic Groups
(Pengubahsuaian
Secara Kimia ke atas Nanotiub Karbon denganMulti-berdinding
Menggabungkan
Kumpulan Berasid)
Nuruzatulifah Bt Asari @ Mansor* , M.G. Kutty & S.B. Abd
Hamid
Combinatorial Technology
and Catalysis Research Centre (COMBICAT), Universiti Malaya
50603 Kuala Lumpur, Malaysia
Jean-Philippe Tessonnier
, Ali Rinaldi , Sylvia Reiche & Robert Schlögl
Fritz Haber Institute of
Max Planck Society, Faradayweg 4-6, D-14195 Berlin, Germany
Diserahkan: 25 April
2011 / Diterima: 18 November 2011
ABSTRACT
Surface functionalization of multi-walled
carbon nanotubes (MWCNTs) was carried out using
a gas phase treatment in a Universal Temperature Program (UTP) reactor
by flowing SO3 gas onto
the CNTs while being heated at different temperatures.
The functionalized nanotubes were characterized using X-ray Fluorescence (XRF),
Fourier Transform Infrared Spectroscopy (FT-IR) and Raman
spectroscopy. The amount of oxyen and sulfur containing groups was determined
by acid-base titration. The titration results were in good agreement with
elemental analysis using x-ray fluorescence. FTIR analysis
showed the presence of oxygen and sulfur containing groups, S=O, C-S, C=O and -COOH. Raman
spectroscopy confirmed that oxygen and sulfur containing acidic groups
covalently attached to the sidewall of the MWCNTs.
Keywords:
Carbon nanotubes; characterization; functionalization; sulphur-based surface
ABSTRAK
Fungsionalisasi permukaan nanotiub karbon
multi-berdinding (MWCNTs) dilakukan dengan
menggunakan rawatan fasa gas dalam reaktor Universal Temperature Program (UTP) dengan
mengalirkan gas SO3 ke dalam MWCNT sambil
dipanaskan pada suhu yang berbeza. Nanotiub karbon yang difungsikan dianalisis
menggunakan pendaflour sinar-X (XRF),
spektroskopi inframerah penjelmaan fourier (FT-IR) dan
spektroskopi Raman. Jumlah oksigen dan kumpulan yang mengandungi sulfur
ditentukan dengan titrasi asid-alkali. Keputusan titrasi berkesesuaian dengan
analisis unsur menggunakan XRF. Analisis FTIR menunjukkan
adanya oksigen dan kumpulan yang mengandungi sulfur, S=O, C-S, C = O dan-COOH.
Spektroskopi Raman mengesahkan bahawa oksigen dan sulfur adalah kumpulan asid yang
diikat secara kovalen pada dinding permukaan MWCNTs.
Kata
kunci: Ciri; fungsionalisasi; permukaan asas sulfur; nanotiub karbon
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*Pengarang
untuk surat menyurat; email: nuruz@siswa.um.edu.my
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