Carbon and Platinum Sandwich Coated Fe3O4 Nanoparticles Catalyzed Hydrogenation of Nitrobenzene to p-Aminophenol
QIAO Yuqing1, GU Jing1, LI Wenzhi1, ZHAO Men1, WANG Xianghao1, WANG Shuangshou1, LIU Ping2, WANG Jun3
1. School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243000, China;
2. School of Petrochemical Engineering, Changzhou University, Changzhou 213000, China;
3. College of Chemical Engineering, Nanjing University of Technology, Nanjing 210000, China
Abstract A novel material of Fe3O4 nanoparticles coated by sandwich-like structure of carbon and platinum (Fe3O4@C/Pt/C) was prepared by double coating method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). The hydrogenation performance of nitrobenzene to p-aminophenol over different catalysts was investigated. The results showed that the carbonization temperature affected the morphology, pore structure, and catalytic performance of the Fe3O4@C/Pt/C. The Fe3O4@C/Pt/C-800 prepared at 800 ℃ exhibited better catalytic performance of nitrobenzene to p-aminophenol, the conversion of nitrobenzene was 94.8%, and p-aminophenol selectivity was 80.4%. The sandwich layer of carbon and platinum could protect the Fe3O4 nucleus, which effectively improved the acid resistance of the catalysts. After four cycles of reaction in acidic media, the conversion of nitrobenzene is 94.5%, and the selectivity of p-aminophenol is 70.2%. The synergy of Fe3O4 core and the platinum nanoparticles of the sandwich-like carbon layer effectively inhibited the excessive hydrogenation of nitrobenzene at the metal active sites, leading a higher selectivity to p-aminophenol.
QIAO Yuqing,GU Jing,LI Wenzhi et al. Carbon and Platinum Sandwich Coated Fe3O4 Nanoparticles Catalyzed Hydrogenation of Nitrobenzene to p-Aminophenol[J]. Chemical Reaction Engineering and Technology, 2022, 38(6): 481-490.
QIAO Yuqing,GU Jing,LI Wenzhi et al. Carbon and Platinum Sandwich Coated Fe3O4 Nanoparticles Catalyzed Hydrogenation of Nitrobenzene to p-Aminophenol[J]. Chemical Reaction Engineering and Technology, 2022, 38(6): 481-490.
