The volatile organic compounds (VOCs) from cooking oil fumes are very complex and do harm to humans and the environment. Herein, we develop the high-efficiency and energy-saving synergistic photothermocatalytic oxidation approach to eliminate the mixture of heptane and hexanal, the representative VOCs with high concentrations in cooking oil fumes. The Pt/CeO₂/TiO₂ catalyst with nanosized Pt particles was prepared by the simple hydrothermal and impregnation methods, and the physicochemical properties of the catalyst were measured using numerous techniques. The Pt/CeO₂/TiO₂ catalyst eliminated the VOC mixture at low light intensity (100 mW cm^–2) and low temperature (200 °C). In addition, it showed 25 h of catalytic stability and water resistance (water concentration up to 20 vol %) at 140 or 190 °C. It is concluded that O₂ picked up the electrons from Pt to generate the ^•O₂^– species, which were transformed to the O₂^2– and O^– species after the rise in temperature. In the presence of water, the ^•OH species induced by light irradiation on the catalyst surface and the ^•OOH species formed via the thermal reaction were both supplementary oxygen species for VOC oxidation. The synergistic interaction of photo- and thermocatalysis was generated by the reactive oxygen species.

中文翻译：

---

Pt/CeO2/TiO2 光热催化去除食用油烟气中 VOCs 活性氧的协同效应

食用油烟中的挥发性有机化合物 (VOC) 非常复杂，会对人类和环境造成危害。在此，我们开发了高效节能的协同光热催化氧化方法来消除庚烷和己醛的混合物，这是食用油烟中高浓度的代表性 VOC。采用简单的水热法和浸渍法制备了具有纳米 Pt 颗粒的 Pt/CeO ₂ /TiO _{2催化剂，并使用多种技术测量了催化剂的物理化学性质。}Pt/CeO ₂ /TiO ₂催化剂在低光强度（100 mW cm ^–2) 和低温 (200 °C)。此外，它在 140 或 190 °C 下显示出 25 小时的催化稳定性和耐水性（水浓度高达 20 vol%）。得出的结论是，O ₂从Pt获取电子生成^• O ₂ ^-物种，在温度升高后转变为O ₂ ^2-和O ^-物种。在水存在的情况下，光照射催化剂表面产生的^• OH 物种和通过热反应形成的^• OOH 物种都是VOC 氧化的补充氧物种。光催化和热催化的协同相互作用是由活性氧产生的。