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

Abstract

Successive impregnation and calcination processes were performed in order to produce TiO2/perlite composites. 2 3-1 fractional factorial design was first applied to optimize the production conditions of TiO2/perlite photocatalysts. Seven TiO2/perlite composites (including three central point experiments) were produced by manipulating three process parameters (amount of TiO2 used in impregnation process, particle size of perlite and calcination temperature). Prepared TiO2/perlite photocatalysts were characterized by XRay Diffraction Spectrometry and SEM. XRD patterns indicated that anatase was the main crystalline phase for all produced samples. Degradation capacities of produced TiO2/perlite composites were investigated in methylene blue degradation process. The linear models of TiO2 loading (%) and methylene blue degradation (%) of TiO2/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 TiO2 loading (%) and methylene blue degradation (%), respectively. According to the coefficient of determination (0.9821 and 0.9970 for the models of TiO2 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 TiO2 and particle size were found as the most effective parameters on both TiO2 loading (%) and degradation efficiency (%). Calcination temperature did not affect TiO2 loading but methylene blue degradation capacity.

Synthesis of CoFe 2 O 4 @ZnMOF/Graphene nanoflake for photocatalytic degradation of diazinon under visible light irradiation: Optimization and modeling using a fractional factorial method

“…Using experimental design techniques, more information can be collected while able to perform some less experiments. Numerous techniques exist for designing experiments, including Central Composite Designs (CCD) [15], Box-Behnken Designs (BBD) [16], Doehlert Designs [17], Full factorial designs [18], Fractional Factorial Designs [19], Mixture Designs [20], Plackett-Burman Designs [21], Taguchi Designs [22], and so on [23]. Full factorial experiments are not always feasible due to nancial, duration, or other limitations [24].…”

Catalytic performance of polyvinylidene fluoride (PVDF) supported TiO2 additive at microwave conditions

“…Researchers adopted the application of the TiO2-immobilized polymer matrix, and they used composite membranes, mainly separation of particles, degradation of organic contaminants, production of fine chemicals, and bacterial removal. Researchers used Ag particles combined with TiO2-Perlite for the degradation of methylene blue removal under UV light radiation (10). Hydroxyl groups that emerged on the surface of composites turned to hydroxyl radicals when UV radiation exposed to them, and these induced to the decomposition of organic dye, waste, and bacteria.…”