Insights into non-crystalline structure of solid solution Ce-Mn co-oxide nanofibers for efficient low-temperature toluene oxidation
发布时间：2024-09-30
点击次数：
DOI码：10.1007/s11356-023-29299-7
所属单位：中南大学
发表刊物：Environmental Science and Pollution Research
关键字：Active oxygen species; Ce-Mn co-oxide nanofibers; Non-crystalline solid solution; Reaction mechanism; Toluene oxidation; VOCs
摘要：Abstract: The controllable preparation of efficient non-crystalline solid solution catalysts is a great challenge in the catalytic oxidation of volatile organic compounds. In this work, series non-crystalline solid solution structured Ce-Mn co-oxide nanofibers were creatively prepared by adjusting Ce/Mn molar ratios using electrospinning. 0.20CeMnOx (the ratio of Ce to Mn was 0.2) displayed an outstanding low-temperature toluene oxidation activity (T 90 = 233 °C). The formation of the amorphous solid solution and the unique nanofiber structure both contributed to a large specific surface area (S = 173 m2 g-1) and high adsorbed oxygen content (Oads/O = 41.3%), which enhanced the number of active oxygen vacancies. The synergies between non-crystalline structure and active oxygen species markedly improved oxygen migration rate as well as redox ability of the catalysts. Additionally, in situ diffuse reflectance infrared Fourier transform spectra showed that the absorbed toluene could be completely oxidized to CO2 and H2O with benzyl alcohol, benzaldehyde, benzoic acid, and maleic anhydride as intermediates. In summary, this study provided an alternative route for the synthesis of non-crystalline metal co-oxide nanofibers.
论文类型：期刊论文
卷号：30
期号：44
页面范围：99830 - 99841
ISSN号：09441344
是否译文：否
发表时间：2024-09-01
收录刊物：SCI
发布期刊链接：https://link.springer.com/article/10.1007/s11356-023-29299-7