甲苯
催化作用
光热治疗
光化学
材料科学
氧化物
辐照
光催化
产量(工程)
光强度
氧化铁
热氧化
化学
纳米技术
光学
有机化学
物理
核物理学
冶金
作者
Zhiwei Wang,Shaohua Xie,Ying Feng,Peijie Ma,Kun Zheng,Erhong Duan,Yuxi Liu,Hongxing Dai,Jiguang Deng
标识
DOI:10.1016/j.apcatb.2021.120612
摘要
In this work, Fe2O3 supported single atom Pt (x Pt1/Fe2O3, x = 0.25 and 0.5 wt%) catalysts (SACs) are synthesized via a novel and simple impregnation-pyrolysis method. HAADF-STEM images show that Pt is atomically dispersed on the surface of Fe2O3. All samples exhibit good light-thermal conversion efficiency, which can increase the surface temperature of catalysts to 210 °C. The 0.5 Pt1/Fe2O3 exhibits the best photothermal catalytic performance (the toluene conversion and CO2 yield are 95 % and 87 %, respectively) for toluene oxidation under the irradiation of simulated sunlight with light intensity of 720 mW/cm2, which is attributed to its good light-thermal conversion efficiency and low temperature reducibility. The Vis-IR light plays a critical role in the photothermal catalytic oxidation of toluene in the whole solar spectrum. Furthermore, the possible photothermal catalytic reaction pathway of toluene oxidation is proposed based on the TD-GC/MS and in-situ DRIFTS experiments.
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