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Nanodot MoS_2@3-dimentional ordered macroporous (3DOM) TiO_2 was represented to be a photocatalyst in the degradation of methylene blue. Nanodot MoS_2 suspension was synthesized by intercalation and e...xfoliation processes. To give the high yield, MoS_2 prepared by a hydrothermal method was selected as a nanodot MoS_2 source instead of large-plane commercial MoS_2. In case of 3DOM TiO_2, polystyrene opal prepared by a self-assembly method was used as the 3DOM template. Then, the hydrolysis and calcination of titanium alkoxide filled in template void were further employed to obtain the 3DOM TiO_2. Finally, nanodot MoS_2 and 3DOM TiO_2 were combined via an impregnation method. Interestingly, nanodot MoS_2@3DOM TiO_2 exhibited the higher performance in degradation than unmodified 3DOM TiO_2. It strongly emphasizes that nanodot MoS_2 provides the quantum confinement effect and prohibits the electron-hole recombination on TiO_2. Furthermore, 3DOM structure of TiO_2 can improve the diffusion rate of involved compounds during the photocatalytic reaction.続きを見る
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