Zhou Zhuoxuan, Wang Yanxuan, Cao Mingkun, He Zhengqi, Qiao Rong, Bi Fukun, Wang Yuxin, Zhang Xiaodong
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
Institute of Chemical Pharmaceutical, Taizhou Vocation & Technical College, Taizhou 318000, China.
Materials (Basel). 2025 Aug 13;18(16):3809. doi: 10.3390/ma18163809.
A series of Ce-doped α-MnO catalysts (CeMnO, x = 0.04, 0.07, 0.10) were synthesized by a simple in situ hydrothermal method. It was confirmed by characterization methods such as XRD, Raman, N adsorption-desorption and SEM confirmed that the introduction of Ce significantly regulated the microstructure of α-MnO, specifically manifested as the reduction in grain size, the increase in defect sites, the increase in Mn-O bond length and altered morphological structure. H-TPR, O-TPD and XPS analyses further revealed the strong interaction between Mn and Ce, accompanied by significant electron transfer (Ce + Mn → Ce + Mn), thereby promoting the formation of Mn species. In the test of toluene catalytic oxidation performance, CMnO exhibited the most excellent catalytic activity (T = 280 °C), while also having good thermal stability and water resistance. Furthermore, the degradation pathways of toluene were analyzed by TD-GC-MS technology: Toluene → Benzene → Benzaldehyde → Maleic anhydride → CO and HO.
通过简单的原位水热法合成了一系列铈掺杂的α-MnO催化剂（CeMnO，x = 0.04、0.07、0.10）。通过XRD、拉曼、N吸附-脱附和SEM等表征方法证实，铈的引入显著调节了α-MnO的微观结构，具体表现为晶粒尺寸减小、缺陷位点增加、Mn-O键长增加以及形态结构改变。H-TPR、O-TPD和XPS分析进一步揭示了Mn和Ce之间的强相互作用，伴随着显著的电子转移（Ce + Mn → Ce + Mn），从而促进了Mn物种的形成。在甲苯催化氧化性能测试中，CMnO表现出最优异的催化活性（T = 280 °C），同时还具有良好的热稳定性和耐水性。此外，采用TD-GC-MS技术分析了甲苯的降解途径：甲苯→苯→苯甲醛→马来酸酐→CO和HO。
