Wang Dongsheng, Zeng Fanming, Hu Xiaoli, Li Chun, Su Zhongmin
School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China.
Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun 130022, People's Republic of China.
Inorg Chem. 2020 Sep 8;59(17):12672-12680. doi: 10.1021/acs.inorgchem.0c01760. Epub 2020 Aug 11.
2D metal-organic framework (MOFs) can be ideal sacrificial templates for fabricating nanomaterials because of active sites exposed on the surface rather than in pores and channels, often exhibiting improved performance in catalysis applications. In this study, the novel 2D layered cobalt-based MOF [Co(TPT)(fma)(HO)]·3HO () has been constructed by the selection of high N atom content ligands. On this basis, a 2D nitrogen-doped carbon-coated cobalt nanoparticle composite (Co@NC) was prepared by using this MOF as a precursor. Magnetic Co@NC has excellent catalytic activity and recycling features regarding the reaction of 4-nitrophenol (4-NP) reducing to 4-aminophenol (4-AP) in the presence of NaBH at ambient temperature. 2D Co@NC-600 can reach nearly 100% conversion within 120 s and its stability remains almost unchanged after five reaction cycles. Moreover, this Co@NC catalyst also is highly active for catalytic reduction of dyes such as Rhodamine B (RhB) and Methylene blue (MB).
二维金属有机框架（MOFs）可成为制备纳米材料的理想牺牲模板，因为其表面而非孔道中暴露有活性位点，在催化应用中常表现出更好的性能。在本研究中，通过选择高氮原子含量的配体构建了新型二维层状钴基MOF [Co(TPT)(fma)(HO)]·3HO（）。在此基础上，以该MOF为前驱体制备了二维氮掺杂碳包覆钴纳米颗粒复合材料（Co@NC）。磁性Co@NC在室温下于NaBH存在时对4-硝基苯酚（4-NP）还原为4-氨基苯酚（4-AP）的反应具有优异的催化活性和循环性能。二维Co@NC - 600在120 s内可实现近100%的转化率，且经过五个反应循环后其稳定性几乎不变。此外，这种Co@NC催化剂对罗丹明B（RhB）和亚甲基蓝（MB）等染料的催化还原也具有高活性。
