Application of Experimental Statistical Method in Optimizing Preparation Variables for Cu-Ni/TiO₂ Photocatalyst

Abstract:

Cu-Ni/TiO₂ was prepared using sol–hydrothermal method. Response surface Method (RSM) including central composite design (CCD) was applied to study the single and combined effects of three primary preparation parameters like water to alkoxide molar ratio (A), acid to alkoxide molar ratio (B), and Cu content (C) on the growth of Cu-Ni doped TiO₂ particle size. The particle size range of the photocatalysts was 13−25 nm. Analysis of variance (ANOVA) revealed a second–order polynomial regression model to fit the experimental data in CCD. A comparison between predicted and experimental values has depicted a good agreement amongst them with high coefficient of determination value (R²= 0.98). The 3-D response surface and the contour plots imply a synergistic effect of parameter A, an antagonistic effect of parameter B, and significant interaction between them on the growth of particle sizes more than parameter C and its interactions with other variables. The smaller average sizes of Cu-Ni doped TiO₂ particles with higher surface area are helpful to increase the light adsorptive property in hydrogen production studies.

• Periodical: Applied Mechanics and Materials (Volume 625)
• Pages: 856-859
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.625.856
• Online since: September 2014
• Authors: Robabeh Bashiri*, Norani Muti Mohamed, Chong Fai Kait, Suriati Sufian
• Keywords: Cu-Ni/TiO₂, Hydrothermal, Particle Size, Response Surface Methodology (RSM)

References

[1] Nowotny, J., et al., Solar-hydrogen: Environmentally safe fuel for the future. International Journal of Hydrogen Energy, 2005. 30(5): pp.521-544.

DOI: 10.1016/j.ijhydene.2004.06.012

[2] Li, P., et al., In situ preparation of Ni–Cu/TiO2 bimetallic catalysts. Journal of Catalysis, 2009. 262(1): pp.73-82.

DOI: 10.1016/j.jcat.2008.12.001

[3] Zhu, J. and M. Zäch, Nanostructured materials for photocatalytic hydrogen production. Current Opinion in Colloid & Interface Science, 2009. 14(4): pp.260-269.

DOI: 10.1016/j.cocis.2009.05.003

[4] Mazaheri, H., et al., Subcritical water liquefaction of oil palm fruit press fiber in the presence of sodium hydroxide: An optimization study using response surface methodology. Bioresource Technology, 2010. 101(23): pp.9335-9341.

DOI: 10.1016/j.biortech.2010.07.004

[5] Liao, D.L. and B.Q. Liao, Shape, size and photocatalytic activity control of TiO2 nanoparticles with surfactants. Journal of Photochemistry and Photobiology A: Chemistry, 2007. 187(2–3): pp.363-369.

DOI: 10.1016/j.jphotochem.2006.11.003

[6] Canterino, M., et al., Energy recovery in wastewater decontamination: Simultaneous photocatalytic oxidation of an organic substrate and electricity generation. Water Research, 2009. 43(10): pp.2710-2716.

DOI: 10.1016/j.watres.2009.03.012