Abstract
Understanding the photocatalytic conversion mechanism of NO is crucial to develop an effective and practical strategy for indoor air pollution control. In this study, we systematically investigated the photocatalytic removal mechanism of NO over nanocrystalline Bi2Sn2O7, which was successfully synthesized via hydrothermal method using bismuth citrate and stannic chloride pentahydrate as precursors for the first time. Various characterizations were carried out to study the physicochemical properties of the as-prepared samples. The performance of the as-prepared Bi2Sn2O7 samples was evaluated by the photocatalytic degradation of NO in a continuous reactor under simulated solar light irradiation. The NO removal rate over the Bi2Sn2O7 sample synthesized for 12 h (BSO-12) was 37%, which was much higher than those of Bi2Sn2O7 samples synthesized for 24 h (BSO-24) and 36 h (BSO-36). Results from photocurrent tests and electrochemical impedance spectroscopy (EIS) demonstrated that the BSO-12 sample presents much ...
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