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

Diserahkan: 7 Januari 2012 / Diterima: 21 Mei 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

RUJUKAN

Arami, H., Mazloumi, M., Khalifehzadeh, R. & Sadrnezhaad, S.K. 2001. Sonochemical preparation of TiO2 nanoparticles. Materials Letters 61: 4559-4561.

Colon, G., Maicu, M., Hidalgo, M.C. & Navio, J.A. 2006. Cu-doped TiO2 system with improved photocatalystic activity. Applied Catalysis B: Environmental 67: 41-51.

Deng, C., Hu, H., Ge, X., Han, C., Zhao, D. & Shao, G. 2011. One-pot sonochemical fabrication of hierarchical hollow CuO submicrospheres. Ultrasonics Sonochemistry 18: 932-937.

Gong, D., Grimes, C.A., Varghese, O.K., Hu, W.C., Singh, R.S., Chen, Z. & Dickey, E.C. 2001. Titanium oxide nanotube arrays prepared by anodic oxidation. Journal of Materials Research 16: 3331-3334.

Gonzalez-Reyes, L., Hernandez-Perez, I., Diaz-Barriga Arceo, L., Dorantes-Rosales, H., Arce-Estrada, E., Suarez-Parra, R. & Cruz-Rivera, J.J. 2010. Temperature effects during Ostwald ripening on structural and bandgap properties of TiO2 nanoparticles prepared by sonochemical synthesis. Materials Science and Engineering B 175: 9-13.

Jitputti, J., Pavasupree, S., Suzuki, Y. & Yoshikawa, S. 2007. Synthesis and photocatalytic activity for water-splitting reaction of nanocrystalline mesoporous Titania prepared by hydrothermal method. Journal of Solid State Chemistry 180: 1743-1749.

Karimipour, M., Wikberg, J.M., Kapaklis, V., Shahtahmasebi, N., Abad, M.R.R., Yeganeh, M., Bagheri-Mohagheghi, M.M. & Svedlindh, P. 2011. Nanoparticles of Ni/ NiO embedded in TiO2 synthesized by the complex-polymer sol-gel method. Physica Scripta 84: 1-5.

Kasuga, T., Hiramatsu, M., Hoson, A., Sekino, T. & Niihara, K. 1999. Titania nanotubes prepared by chemical processing. Advanced Materials 11(15): 1307-1311.

Kokil, P., Senthilkumar, V. & Nazeer, K.P. 2011. Preparation and photo catalytic activity of Fe3+ doped TiO2 nanoparticles. Archives of Physics Research 2(1): 246-253.

Li, D. & Xia, Y. 2003. Fabrication of Titania nanofibers by electrospinning. Nano Letters 3(4): 555-560.

Li, Z., Hou, B., Xu, Y., Wu, D., Sun, Y., Hu, W. & Deng, F. 2005. Comparative study of sol-gel-hydrothermal and sol-gel synthesis of Titania-Silica composite nanoparticles. Journal of Solid State Chemistry 178(5): 1395-1405.

Truaistaru, G.A., Covaliu, C.I., Opear, O., Matei, V., Cursaru, D.L., Jitaru, I. & Matel, D. 2011. MTiO3 (M=Cu,Ni) as catalysts in toluene oxidation. Revista De Chimie 62(8): 773-776.

Viana, M.M., Soares, V.F. & Mohallem, N.D.S. 2010. Synthesis and characterization of TiO2 nanoparticles. Ceramics International 36: 2047-2053.

Wang, D., Zhang, J., Luo, Q., Li, X., Duan, Y. & An, J. 2009. Characterization and photocatalytic activity of poly (3-hexylthiophene)-modified TiO2 for degradation of methyl orange under visible light. Journal of Hazardous Materials 169: 546-550.

Wang, S., Xu, H., Qian, L., Jia, X., Wang, J., Liu, Y. & Tang, W. 2009. CTAB-assisted synthesis and photocatalytic property of CuO hollow microspheres. Journal Solid State Chemistry 182: 1088-1093.

Xin, B., Wang, P., Ding, D., Liu, J., Ren, Z. & Fu, H. 2008. Effect of surface species in Cu-TiO2 Photocatalytic activity. Applied Surface Science 254: 2569-2574.

Yan, X., He, J., Evans, D.G., Zhu, Y. & Duan, X. 2004. Preparation characterization and photocatalytic activity of TiO2 formed from a mesoporous precursor. Journal of Porous Materials 11(3): 131-139.

Yoo, S., Akbar, S.A. & Sandhage, K.H. 2004. Nanocarving of blank Titania crystals into oriented arrays of single-crystal nanofiber via reaction with hydrogen-bearing gas. Advanced Materials 16: 260-264.

You, M., Kim, T.G. & Sung, Y.M. 2009. Synthesis of Cu-doped TiO2 nanorods with various aspect ratios and dopant concentrations. Crystal Growth & Design 10(2): 983-987.

Yu, C., Yu, J.C. & Chan, M. 2009. Sonochemical fabrication of mesoporous titanium dioxide microspheres. Journal of Solid State Chemistry 182: 1061-1069.

Yu, J., Hai, Y. & Jaroniec, M. 2011. Photocatalytic hydrogen production over CuO- modified Titania. Journal of Colloid and Interface Science 357: 223-228.

*Pengarang untuk surat-menyurat; email: narongdet.wo@gmail.com