Sains Malaysiana 42(2)(2013): 175–181

Cu-Doped TiO₂ Nanopowders Synthesized by Sonochemical-Assisted Process

(Serbuk Nano Cu Terdop TiO₂ Disediakan Melalui Proses Sonokimia Terbantu)

Narongdet Wongpisutpaisan¹*, Naratip Vittayakorn^1,2, Anucha Ruangphanit³

& Wisanu Pecharapa^1,4

¹College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang

Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand

²Department of Chemistry, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok, 10520, Thailand

³Thai Microelectronics Center, Wangtakien District, Amphur Muang, Chachoengsao, 24000, Thailand

⁴ThEP Center, CHE, 328 Si Ayutthaya Rd. Bangkok 10400, Thailand

Received: 7 January 2012 / Accepted: 21 May 2012

ABSTRACT

Cu-doped TiO₂ nanopowders were prepared by sonochemical-assisted process via a precursor solution of titanium isopropoxide, copper nitrate trihydrate and sodium hydroxide in the presence of polyvinyl alcohol in combination with calcinations process. The as-synthesized products were calcined at various temperatures ranging from 500-1000°C. The physical microstructures, morphologies and chemical bonding of as-calcined nanopowders were characterized by X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. It was noted that the crystallization, structure and size of the powders were strongly dependent on calcinations temperature. Their optical absorption properties were investigated and the results suggested that Cu dopant could significantly improve the optical absorption properties of TiO₂.

Keywords: Cu-doped TiO₂; nanopowders; sonochemical-assisted process

ABSTRAK

Serbuk nano Cu-terdop TiO₂ telah disediakan melalui proses sonokimia terbantu melalui penggunaan larutan titanium isopropoksida, kuprum nitrat trihidrat dan natrium hidroksida dengan kehadiran polivinil alkohol berserta gabungan proses pemanasan. Produk yang tersintesis dipanaskan pada suhu yang berbeza, antara 500-1000°C. Mikrostruktur, morfologi dan ikatan kimia serbuk nano yang dipanaskan telah dicirikan menggunakan pembelauan sinar-X, mikroskop elektron imbasan dan spektroskopi transformasi Fourier inframerah. Penghabluran, struktur dan saiz serbuk sangat bergantung kepada suhu pemanasan. Sifat penyerapan optik telah diselidik dan hasilnya menunjukkan bahawa Cu terdop dapat meningkatkan sifat penyerapan optik TiO₂ secara signifikan.

Kata kunci: Cu-terdop TiO₂; proses sonokimia terbantu; serbuk nano

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*Corresponding author; email: narongdet.wo@gmail.com