The Effect of Cu Concentration on TiO₂ Nanotubes for Low Concentration of Pb(II) Removal

Abstract:

Lead (Pb) has been recognized to be acutely toxic to human beings and studies have shown that young children, infants and pregnant women are particularly at risk to unsafe Pb (II) level. Generally, high level of Pb(II) can be removed by using alginate beads. However, at low level, it is not possible to be removed by alginate. For that reason, low concentration (10 ppm) of Pb(II) removal by photocatalytic activity is explored in this work. Cu loaded TiO₂ nanotube was prepared by wet impregnation with different Cu concentration. The initial concentration of Cu involved were 0.01 M, 0.06 M and 0.1 M. For heavy metal removal, the initial concentration of Pb(II) solution used was 10 ppm. The remnant concentration of Pb(II) solution after irradiated under ultraviolet(UV) light was determined by using Atomic Absorption Spectroscopy (AAS). It was observed that the optimal condition of Cu loaded nanotube was at 0.01 M and it exhibited highest removal of Pb(II) with 50%. However, at high Cu concentration(> 0.06 M), it declined the performance of TiO₂ nanotubes for Pb(II) removal. The removal of Pb(II) obtained at 0.06 M and 0.01M was only 23.3% and 17.1%.

• Periodical: Materials Science Forum (Volume 756)
• Pages: 212-218
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.756.212
• Online since: May 2013
• Authors: Syazwani Mohd Zaki, Srimala Sreekantan
• Keywords: Atomic Absorption Spectroscopy (AAS), Cu Concentration, Pb (II) Removal, TiO₂ Nanotube, UV Light Irradiation

References

[1] WANG, H., ZHOU, A., PENG, F., YU, H. & YANG, J. 2007. Mechanism study on adsorption of acidified multiwalled carbon nanotubes to Pb(II). Journal of Colloid and Interface Science, 316, 277-283

DOI: 10.1016/j.jcis.2007.07.075

[2] ZHANG, W., LI, Y., ZHU, S. & WANG, F. 2004. Copper doping in titanium oxide catalyst film prepared by dc reactive magnetron sputtering. Catalysis Today, 93–95, 589-594.

DOI: 10.1016/j.cattod.2004.06.009

[3] P.J. Zhao., RONG W., J. HOU., Chang A. CHANG., F GUAN., B. ZHANG., One-step hydrothermal synthesis and visible-light photocatalytic activity of ultrafine cu- nanodot- modified tio2 nanotubes, Acta Physico-Chimica Sinica,2012,28(8):1971-1977

[4] MURRUNI, L., LEYVA, G. & LITTER, M. I. 2007. Photocatalytic removal of Pb(II) over TiO2 and Pt–TiO2 powders. Catalysis Today, 129, 127-135.

DOI: 10.1016/j.cattod.2007.06.058

[5] XIN, B., WANG, P., DING, D., LIU, J., REN, Z. & FU, H. 2008. Effect of surface species on Cu-TiO2 photocatalytic activity. Applied Surface Science, 254, 2569-2574.

DOI: 10.1016/j.apsusc.2007.09.002

[6] XU, S., DU, A. J., LIU, J., NG, J. & SUN, D. D. 2011. Highly efficient CuO incorporated TiO2 nanotube photocatalyst for hydrogen production from water. International Journal of Hydrogen Energy, 36, 6560-6568.

DOI: 10.1016/j.ijhydene.2011.02.103

[7] ZHANG, W., LI, R. & HE, H. 2012. Synthesis of Mesoporous TiO2-Al2O3 Binary Oxides Photocatalyst by Sol-Gel Method Using PEG1000 as Template. International Journal of Photoenergy, 2012, 7.

[8] ZHOU, J., TAKEUCHI, M., RAY, A. K., ANPO, M. & ZHAO, X. S. 2007. Enhancement of photocatalytic activity of P25 TiO2 by vanadium-ion implantation under visible light irradiation. Journal of Colloid and Interface Science, 311, 497-501.

DOI: 10.1016/j.jcis.2007.03.007

[9] ZHANG, D. 2010. Enhanced photocatalytic activity for titanium dioxide by co-modification with copper and iron. Transition Metal Chemistry, 35, 933-938.

DOI: 10.1007/s11243-010-9414-6

[10] XIN, B., WANG, P., DING, D., LIU, J., REN, Z. & FU, H. 2008. Effect of surface species on Cu-TiO2 photocatalytic activity. Applied Surface Science, 254, 2569-2574.

DOI: 10.1016/j.apsusc.2007.09.002

[11] CUMPSON, P. J. 1995. Angle-resolved XPS and AES: Depth-resolution limits and a general comparison of properties of depth-profile reconstruction methods. Journal of Electron Spectroscopy and Related Phenomena, 73, 25-52.

DOI: 10.1016/0368-2048(94)02270-4

[11] BONATO, M., RAGNARSDOTTIR, K. & ALLEN, G. Removal of Uranium(VI), Lead(II) at the Surface of TiO₂ Nanotubes Studied by X-Ray Photoelectron Spectroscopy. Water, Air, & Soil Pollution, 1-13.

DOI: 10.1007/s11270-012-1153-1