Chiang Mai Journal of Science

Magnetically separable TiO₂-graphene oxide nanocomposites (Fe₃O₄/TiO₂/GO_0.10) and magnetically TiO₂ nanocomposites (Fe₃O₄/TiO₂) were successfully synthesized by coprecipitation method. As prepared Fe₃O₄/TiO₂/GO_0.10 and Fe₃O₄/TiO₂ were characterized by SEM-EDS, FTIR, XRD, TG, specific surface area and pore size analysis. The photocatalytic efficiency of Fe₃O₄/TiO₂/ GO_0.10 and Fe₃O₄/TiO₂ were evaluated using the degradation of acridine orange. The effect of pH, time, ultraviolet and recycle on photocatalytic performance of Fe₃O₄/TiO₂/GO_0.10 and Fe₃O₄/TiO₂ were studied. Fe₃O₄/TiO₂/GO_0.10 is better than Fe₃O₄/TiO₂ for the degradation of acridine orange under visible light and ultraviolet light. This is mainly because the addition of GO can improve the photocatalytic performance of Fe₃O₄/TiO₂/GO_0.10. Fe₃O₄/TiO₂/GO_0.10 exhibited reasonably good photocatalytic efficiency after three cycles. Fe₃O₄/TiO₂/GO_0.10 can be used as a recyclable catalyst for the removal of acridine orange.