Abstract
Improvements to the degradation of NO by photocatalysts requires enhanced oxidation activity. In this work, the heterostructural photocatalyst BiOBr0.5I0.5/BiOBr/BiOI was prepared and showed enhanced photocatalytic efficiency for the removal of NO. We examined the photocatalytic removal of NO and confirmed that the improved efficiency of NO removal in our systems was due to the synergic effect of enhanced carrier and exciton photocatalysis. The superoxide and singlet oxygen generated from these two processes lead to the highly efficient removal of NO. Meanwhile, the photocatalytic NO removal mechanism of BiOBr0.5I0.5/BiOBr/BiOI was explored by in-situ FT-IR. This investigation provides a new approach to the design of efficient photocatalysts and an increased understanding of the NO removal mechanism through photocatalytic technology.
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