Synthesis and Characterization of a Novel Plasmonic Nanocomposite Photocatalyst: Ag/MoS2 Nanodots/TiO2 Mesoporous Beads

Wednesday, 31 May 2017: 10:00
Cambridge (Hilton New Orleans Riverside)
J. P. M. Alido and J. M. Ting (National Cheng Kung University)
In this present work, the photodegradation ability of TiO2 mesoporous beads having a higher surface area and better light scattering effect than commercial P25 was further improved. A novel plasmonic nanocomposite photocatalyst Ag/MoS2 nanodots/TiO2 mesoporous beads was developed in order to overcome the inactivity of TiO2 under visible light and the high recombination rate of photogenerated electron-hole pairs. TiO2 mesoporous beads were first synthesized through sol-gel process followed by hydrothermal method. Then, Ag/MoS2 nanodots were deposited onto the TiO2 mesoporous beads through facile liquid ultrasonic mixing and chemical reduction method. Nanocomposite photocatalysts having different ratios of Ag, MoS2 nanodots, and TiO2 mesoporous beads were synthesized and investigated. Their photocatalytic activities were then determined through the photodegradation of a methylene blue solution.