One-Pot Synthesized BiOI/TiO2 Heterostructure with Enhanced Photocatalytic Performance and Photocatalytic Treatment of Gas-Phase Hg0
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In this study, a series of BiOI/TiO2 heterostructure photocatalysts were prepared by a facile one-pot hydrothermal method. All samples were characterized by XRD, TEM and other techniques. The results showed that the heterostructures between BiOI and TiO2 were formed successfully. The photoactivities of the samples were tested by catalytic oxidation of Hg0 and BT-4 showed the highest removal efficiency, reaching up to 82.5%. Moreover, the trapping experiments indicated that ·O2− and h+ were the main reactive components for Hg0 removal. Finally, a possible mechanism was proposed: A Z-scheme electron/hole transport mechanism was the main reason for the enhanced photoactivity.
KeywordsHydrothermal Heterostructure Photocatalytic Hg0 Main reactive species
This work was partially sponsored by National Natural Science Foundation of China (21237003, 50806041, 51106133, 51606115), Shanghai Science and Technology Development (15110501000), Natural Science Foundation of Shanghai (16ZR1413500).
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