nanoparticles were synthesized by the P-25 powder modified sol-gel method under different TTIP (Titanium tetraisopropoxide) concentrations, P-25 loading and the gelation pHs. Based on XRD analysis SEM results and BET technique, the crystalline compositio, the level of crystallinity, the particle size and the surface area of the as-prepared samples were found to be affected by these parameters. Response surface methodology based on central composite design was used to optimize these synthesis parameters in photodegradation of Acid Red 73. The degradation efficiency was significantly affected by P-25 loading, pH value of gelation and the interaction effect between TTIP concentration and P-25 loading. The optimal values of parameters were found to be a pH of 1.34, a TTIP concentration of 0.25 M and a P-25 loading of 39.76 g/L. Regression analysis with an R2 value of 0.9549 showed a good agreement between the experimental results and the predicted value.
—Modified sol-gel method, Response surface methodology, structural properties, titanium dioxide nanopowders.
Somayeh Alijani, Mohammad Vaez, and Abdolsamad Zarringhalam Moghaddam are with Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran (email: email@example.com, firstname.lastname@example.org, email@example.com).
Cite:Somayeh Alijani, Mohammad Vaez, and Abdolsamd Zarringhalam Moghaddam, "Optimization of Synthesis Parameters in Photodegradation of Acid Red 73 Using TiO2 Nanoparticles Prepared by the Modified Sol-Gel Method," International Journal of Environmental Science and Development vol. 5, no. 1, pp. 108-113, 2014.