PREPARATION OF TiO2/PERLITE COMPOSITES BY USING 23-1 FRACTIONAL FACTORIAL DESIGN

Authors : Dilek Duranoğlu

Pages : 299-312

Doi:10.18596/jotcsa.30978

View : 18 | Download : 3

Publication Date : 2017-01-08

Article Type : Research Paper

Abstract :Successive impregnation and calcination process was performed in order to produce TiO 2 /perlite composites. 2 3-1 fractional factorial design was first applied to optimize the production conditions of TiO 2 /perlite photocatalysts. Seven TiO 2 /perlite composites insert ignore into journalissuearticles values(including three central point experiments); were produced by manipulating three process parameters insert ignore into journalissuearticles values(amount of TiO 2 used in impregnation process, particle size of perlite and calcination temperature);. Prepared TiO 2 /perlite photocatalysts were characterized by        X-Ray Diffraction Spectrometer and SEM. XRD patterns indicated that anatase was the main crystalline phase for all produced samples. Degradation capacities of produced TiO 2 /perlite composites were investigated in methylene blue degradation process. The linear models of TiO 2 loading insert ignore into journalissuearticles values(%); and methylene blue degradation insert ignore into journalissuearticles values(%); of TiO 2 /perlite composites were developed by regression analysis of the experimental data. As a result of analysis of variance, it was found that developed models were statistically significant with the p-value of 0.0040 and 0.0003, for TiO 2 loading insert ignore into journalissuearticles values(%); and methylene blue degradation insert ignore into journalissuearticles values(%);, respectively. According to the coefficient of determination insert ignore into journalissuearticles values(0.9821 and 0.9970 for the models of TiO 2 loading and methylene blue degradation, respectively); and error analysis, developed models fit well to the experimental data. Effect of process parameters was investigated by using response surface plots. Amount of TiO 2 and particle size were found as the most effective parameters on both TiO 2 loading insert ignore into journalissuearticles values(%); and degradation efficiency insert ignore into journalissuearticles values(%);. Calcination temperature did not affect TiO 2 loading but methylene blue degradation capacity.
Keywords : 23 1 factorial design, photocatalyst, TiO2, perlite