Abstract
Control the microstructure of the photocatalyst and change the reaction medium have great potential to improve activity and selectivity of a photocatalyst. Herein, we prepared ordered mesoporous and quantum dot BiO with similar grain size, and then studied their CO2 reduction performance under different reaction mediums. The results revealed that the activity, selectivity and stability of a photocatalyst are importantly influenced by reaction medium and microstructure of a photocatalyst. Under the same conditions, quantum dot BiO exhibited higher activity but much lower stability than mesoporous structure. More importantly, it was found gas-solid reaction are more efficient than liquid-solid reaction mode.
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