Sains Malaysiana 40(5)(2011): 503–509

Kesan Masa Pengeraman Nanozarah Zink Oksida yang Dihasilkan Menggunakan Afrons Gas Koloid

(Incubation Effect on Zinc Oxide Nanoparticles Produced Using Colloidal Gas Aphrons)

Saifful Kamaluddin Muzakir*

Fakulti Sains & Teknologi Industri, Universiti Malaysia Pahang, Lebuhraya Tun Razak

26300 Gambang, Kuantan, Pahang, Malaysia

Shahidan Radiman

Pusat Pengajian Fizik Gunaan, Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor D.E., Malaysia

Diserahkan: 12 Mac 2010 / Diterima: 7 Julai 2010

ABSTRAK

Nanozarah zink oksida telah disintesis menggunakan afrons gas koloid sebagai acuan. Zink sulfat (ZnSO4.7H2O) dan gas ammonia digunakan sebagi bahan tindak balas. Masa pengeraman yang dikaji adalah 2 jam dan 18 jam. Daripada analisis mikroskop elektron imbasan, morfologi nanohelaian dapat diperhatikan dengan ketebalan helaian 125 nm hingga 200 nm. Daripada analisis spektroskopi ultra lembayung-boleh nampak, saiz purata yang dianggarkan bagi sampel nanozarah zink oksida yang disintesis dengan masa pengeraman 2 jam adalah 2.03 nm dan 2.1 nm untuk sampel yang dieramkan selama 18 jam.

Kata kunci: Afrons gas koloid; kesan masa pengeraman; nano ZnO; semikonduktor

ABSTRACT

Zinc oxide nanoparticles has been synthesized using colloidal gas aphrons as template. Zinc sulfate (ZnSO4.7H2O) and ammonia gas used as reactants. The incubation periods that have been studied are 2 h and 18 h. From the scanning electron microscope analysis, nanosheet morphology can be observed with thickness of 125 nm to 200 nm. From the UV-Vis spectroscopy analysis, the estimated average size for zinc oxide nanoparticles with 2 h incubation time is 2:03 nm and 2.1 nm for 18 h of incubation time.

Keywords: Colloidal gas aphrons; incubation effect; nano ZnO; semiconductor

RUJUKAN

Bagnall, D.M., Chen, Y.F. & Zhu, Z. 1998. High temperature excitonic stimulated emission from ZnO epitaxial layers. Applied Physics Letters 73: 1038-3917.

Brus, L.E. 1984. Electron-electron and electron-hole interactions in small semiconductor crystallites: the size dependence of the lowest excited electronic state. Journal of Chemical Physics 80: 4403-4409.

Champalkar, P.G., Valsaraj, K.T. & Roy, D. 1993. Xanthan precipitation from solutions and fermentation broths. Separation Science and Technology 28: 1303-1313.

Dai, Y. & Deng, T. 2003. Stabilization and characterization of colloidal gas aphron dispersions. Journal of Colloid and Interface Science 261: 360-365.

Hensirisak, P. 1997. Scale-up the use of microbubble dispersion to increase oxygen transfer in aerobic fermentation of baker’s yeast. M.Sc. Thesis. Virginia Polytechnic Institute and State University.

Jarudilokkul, S. & Rungphetcharat, K. 2004. Protein separation by colloidal gas aphrons using nonionic surfactant. Separation and Purification Technology 35: 23-29.

Jauregi, P. & Varley, J. 1999. Colloidal gas aphrons: potential applications in biotechnology. Tibtech 17:389- 395.

Kommalapati, R.R. & Valsaraj, K.T. 1998. Soil flushing using colloidal gas aphron suspensions generated from a plant-based surfactant. Journal of Hazardous Materials 60: 73-87.

Li, C. & Xiyu, S. 2002. Quantum confinement effect of ZnO nano-particles. Chemistry Magazine 4: 45-50.

Phelan, R., Weaire, D., Peters, E. A. J. F. & Verbists, G. 1996. The conductivity of a foam. Journal of Physics: Condensed Matter 8: 475- 482.

Sebba, F. 1985. An improved generator for micron-sized bubbles. Chemistry and Industry 4: 91-96.

Wang, Z.L. 2004. Nanostructure of zinc oxide. Materials Today 7: 18-23.

Winter, M. 2003. Chemistry: Periodic table: Binding energy data. (atas talian). http://www.webelements.com/webelements/element.html (5 September 2004).

*Pengarang untuk surat menyurat; email: saifful@ump.edu.my