Sains Malaysiana 37(3): 289-293(2008)

Carbon Nanopipe Catalysed by As-Prepared NiO Nanoparticles

(Karbon Nanopaip Dimangkinkan oleh Nanozaral NiO Seperti Tersedia)

Noorhana Yahya

Electrical and Electronics Engineering Department

Universiti  Teknologi PETRONAS, Bandar Seri Iskandar

31750, Tronoh, Perak, Malaysia

Samaila Bawa Waje & Irmawati Ramli

­Advanced Materials and Nanotechnology Laboratory (AMNL)

Institute of Advanced Technology, Universiti Putra Malaysia

43400 UPM Serdang, Selangor

Darul Ehsan, Malaysia.

ABSTRACT 

Carbon nanopipes catalyzed by high purity nickel oxide (NiO) nanoparticles were reported. The nanocrystals catalysts were first prepared using precipitation technique and characterized using x-ray diffraction (XRD), energy dispersive x-ray (EDX) and scanning electron microscopy (SEM) and subsequently used as catalyst for the formation of nanotubes. Pure phase, rhombohedral nickel oxide formation was identified from the XRD data, with the major peak located at 43.29^o of the 2θ degree corresponding to a (202) plane. A pulsed laser ablation deposition technique (PLAD) was used to produce the CNTs. From the SEM micrograph, deposited CNTs shows a web-like structure, while the HR-TEM reveals carbon nanopipes with a length of 10 micron and diameter of 430 nm, suggesting that the nanocrystals aggregate and forms bigger cluster consequence of the ablation process. 

Keywords: Nickel oxide; Rhombohedral; Precipitation; Pulsed Laser Ablation Deposition

ABSTRAK 

Karbon nanopaip bermangkinkan partikal oksida nikel  nanosaiz dan berketulenan tinggi dilaporkan. Mangkin nanohablur ini telah disediakan dengan menggunakan kaedah pemendakan dan telah  menggunakan teknik pembelauan Sinar-X (XRD), serakan tenaga sinar–X (EXD) dan mikroskop elektron(SEM). Ia seterusnya telah digunakan sebagai mangkin dalam pembentukan karbon tiub nano. Fasa tulen, pembentukan imbasan oksida nikel rombohedral telah dikenalpasti daripada data sinar –X yang diperoleh dengan puncak utama dilokasi 2θ  = 43.29 yang diindeks kepada satah (202). Teknik Dedenyut laser ablasi (PLAD) digunakan untuk menghasilkan karbon tiub nano. Merujuk kepada grafmikro, karbon nanopaip yang termendak menunjukkan struktur ala-jaringan manakala Mikroskop transmisi elektron resolusi tinggi (HR-TEM) menunjukkan karbon nanopaip dengan panjang 10 mikron dan diameter 430 nm. Dicadangkan bahawa mangkin  nanohablur telah membentuk kluster yang besar akibat daripada proses ablasi tersebut.

Kata kunci: Nikel oksida; rombohedron; pemendakan; pengenapan ablasi dedenyut (PLAD)

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