Zhang Meng, Cai Songcai, Li Juanjuan, Elimian Ehiaghe Agbovhimen, Chen Jing, Jia Hongpeng
CAS Center for Excellence in Regional Atmospheric Environment, and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China; University of Chinese Academy of Sciences, Beijing 100049, China.
CAS Center for Excellence in Regional Atmospheric Environment, and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham, Ningbo 315100, Zhejiang, China.
J Hazard Mater. 2021 Jun 15;412:125266. doi: 10.1016/j.jhazmat.2021.125266. Epub 2021 Jan 29.
Light driven photothermal catalysis has been carried out by converting the light energy into heat to reach the light-off temperature of the reaction. Herein we have synthesized the ternary multifunctional catalysts of polymeric carbon nitride coupled with Pt-embedded transition metal oxide (Pt-Co/CN), for the catalytic degradation of toluene. Under the condition of space velocity of 30,000 mL/(gh) and concentration of 210 ppm, toluene conversion and CO mineralization can reach 90% and 83% over Pt-Co/CN, respectively. The introduction of an appropriate proportion of CoO enhances the light absorption of nanocomposites and improves the adsorption for toluene. Meanwhile, CoO promotes the proportion and mobility of adsorbed oxygen on the surface, which are conducive to the catalytic oxidation reaction according to the Mars-van Krevelen mechanism. The results also suggest that light irradiation serves as a source of heat to initiate photo-induced chemical reactions and promote photothermal catalytic oxidation by promoting the activation of lattice oxygen.
通过将光能转化为热能以达到反应的起燃温度来进行光驱动光热催化。在此，我们合成了负载铂的过渡金属氧化物耦合的聚合氮化碳三元多功能催化剂（Pt-Co/CN），用于催化降解甲苯。在空速为30,000 mL/(gh)、浓度为210 ppm的条件下，Pt-Co/CN对甲苯的转化率和CO矿化率分别可达90%和83%。引入适当比例的CoO可增强纳米复合材料的光吸收并改善对甲苯的吸附。同时，CoO促进了表面吸附氧的比例和迁移率，根据Mars-van Krevelen机理，这有利于催化氧化反应。结果还表明，光照作为热的来源引发光诱导化学反应，并通过促进晶格氧的活化来促进光热催化氧化。
