A Fe doped TiO₂ catalyst (Fe-TiO₂) was evaluated for NO oxidation reaction under visible light irradiation. The Fe-TiO₂ not only exhibited better catalytic activity and stability, but also suppressed the production of nitrogen dioxide (NO₂) than the undoped TiO₂. The results of in situ DRIFTS indicated that visible light benefited the adsorption and activation of NO at Fe sites (Fe-(NO)₂) and Ti sites (Ti³⁺-NO) as well as the formation of active intermediates (e.g. Fe³⁺-NO₃⁻ and Ti⁴⁺-NO⁻). After EPR, DRS, PL and XPS testing, it was proposed that incorporating Fe ions into TiO₂ induced the formation of more oxygen vacancies (OVs), while visible light further facilitated this process, resulting in an enhanced adsorption & activation of NO and also a promoted formation of reactive oxygen species (ROS). Thus, a strengthened photo-driven effect for oxidizing NO into NO₂⁻ and NO₃⁻ occurred on Fe-TiO₂.

评价了Fe掺杂的TiO ₂催化剂（Fe-TiO ₂）在可见光照射下的NO氧化反应。Fe-TiO ₂不仅表现出更好的催化活性和稳定性，而且比未掺杂的TiO ₂抑制了二氧化氮（NO ₂）的产生。原位DRIFTS结果表明，可见光有利于NO在Fe位（Fe-（NO）₂）和Ti位（Ti ³⁺ -NO）上的吸附和活化以及活性中间体（例如Fe ^{3 +} -NO ₃ ^-和Ti ⁴⁺ -NO ^-）。经过EPR，DRS，PL和XPS测试后，有人提出将Fe离子掺入TiO _2中会诱导形成更多的氧空位（OVs），而可见光则进一步促进了该过程，从而增强了NO的吸附和活化，并且促进活性氧的形成（ROS）。因此，用于氧化NO向NO加强光驱动的效果₂ ^-和NO ₃ ^-发生对Fe-的TiO ₂。