Wu Lan, Liu Yang, Li Zhenhua, Liang Jinhua, Geng Lei, Chen Li, Dong Zhengping
College of Chemical Engineering, Northwest Minzu University Lanzhou Gansu 730030 PR China
Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass, University of Gansu Province Lanzhou 730030 China.
RSC Adv. 2023 Oct 16;13(43):30243-30251. doi: 10.1039/d3ra05357a. eCollection 2023 Oct 11.
Supported nano-catalysts with environmental sustainability and high catalytic performance are of great research interest for sustainable catalysis. In this article, a supported nano-catalyst, FeA-NC, with high catalytic performance was prepared by anchoring the transition metal iron onto nitrogen-doped porous carbon materials using chitosan as a raw material. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) measurement results demonstrated that the obtained catalyst has an excellent mesoporous structure, and that the element Fe is evenly distributed. The support contains abundant N atoms, which can provide sufficient anchoring points for Fe and form Fe-N groups with Fe, improving the catalytic activity of the catalyst. Additionally, the FeA-NC with a porous structure can also enhance the mass transfer of reactants to improve the reaction efficiency. In addition, the prepared catalyst was used to catalyze the conversion of primary amines to the corresponding imines. The results showed that the direct oxidation of primary amines to the corresponding imines can be catalyzed by using air as an oxygen source and distilled HO as a solvent under atmospheric pressure at 90 °C. Finally, the selectivity and stability of the as-prepared catalyst were also verified.
具有环境可持续性和高催化性能的负载型纳米催化剂对于可持续催化具有重大的研究意义。在本文中，以壳聚糖为原料，通过将过渡金属铁锚定在氮掺杂多孔碳材料上，制备了一种具有高催化性能的负载型纳米催化剂FeA-NC。扫描电子显微镜（SEM）、X射线衍射（XRD）和傅里叶变换红外光谱（FT-IR）测量结果表明，所制备的催化剂具有优异的介孔结构，且元素铁分布均匀。载体含有丰富的氮原子，可为铁提供足够的锚定位点，并与铁形成Fe-N基团，提高催化剂的催化活性。此外，具有多孔结构的FeA-NC还可增强反应物的传质，提高反应效率。另外，将所制备的催化剂用于催化伯胺转化为相应的亚胺。结果表明，在90℃、大气压下，以空气为氧源、蒸馏水为溶剂，可催化伯胺直接氧化为相应的亚胺。最后，还验证了所制备催化剂的选择性和稳定性。
