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چکیده
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In this research, the dye photo-catalytic removal was investigated using zirconia (ZrO2) nanocatalysts, zeolite (Ze), ZrO2-Ze with different percentages, and optimized ZrO2-Ze doped via urea, copper oxide, and cerium oxide. In order to determine the optimal condition, the effect of different catalysts and parameters such as dye concentration, UV lamp power, amount of the loaded catalyst and pH were investigated. The response surface methodology (RSM) was used to obtain optimal experimental condition. Physical and chemical properties of materials were investigated by XRD, FTIR, SEM and BET. Completely Methyl Orange (MO)-dye removal (100%) was achieved at optimal condition under UV light during 80 minutes. The optimal operational condition for MO photo-catalytic decomposition using an optimal N-doped 10 wt. % ZrO2-Zeolite nanocatalyst was obtained at UV lamp power, the pH, catalyst loading and dye concentration of 15 W, 3, 0.4 g/L, and 5 mg/L, respectively. Photo-catalytic degradation kinetics of MO well described using pseudo-first order which is in accordance with Langmuir-Hinshelwood model (kapp = 0.031 min-1).
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