Abstract
To increase the activity of immobilized catalyst by synergetic effect of adsorption and to extend the activity of Fe 0, a composite membrane with Fe 0, activated carbon fiber (ACF) and TiO 2 was prepared, using dip-coating, impregnation and chemical reduction methods. The activity of the prepared membrane was evaluated for mineralizing 2,4-dichlorophenol (2,4DCP) in water under UV illumination. The co-presence of Fe 0 and TiO 2 enhanced 2,4DCP degradation. ACF addition and its adsorption effect were shown in promoting 2,4DCP mineralization and TOC removal by comparing activities of composite membranes with Fe 0/TiO 2/ACF or Fe 0/TiO 2. Effects of pH and iron loading ratio to TiO 2 on degradation rate of 2,4DCP using the composite membrane were investigated and optimized. The optimal pH was 6 and the optimal loading of Fe 0 was 1 wt% to TiO 2. The repeated test results and XRD patterns of catalysts before and after reaction proved that the Fe 0/TiO 2/ACF membrane was durable and stable in its photocatalytic activity.
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