Iron catalysis has attracted a wealth of interdependent research for its abundance,low price,and nontoxicity.Herein,a convenient and stable iron oxide(Fe2O3)‐based catalyst,in which active Fe2O3nanoparticles(NPs)were...Iron catalysis has attracted a wealth of interdependent research for its abundance,low price,and nontoxicity.Herein,a convenient and stable iron oxide(Fe2O3)‐based catalyst,in which active Fe2O3nanoparticles(NPs)were embedded into carbon films,was prepared via the pyrolysis of iron‐polyaniline complexes on carbon particles.The obtained catalyst shows a large surface area,uniform pore channel distribution,with the Fe2O3NPs homogeneously dispersed across the hybrid material.Scanning electron microscopy,Raman spectroscopy and X‐ray diffraction analyses of the catalyst prepared at900°C(Fe2O3@G‐C‐900)and an acid‐pretreated commercial activated carbon confirmed that additional carbon materials formed on the pristine carbon particles.Observation of high‐resolution transmission electron microscopy images also revealed that the Fe2O3NPs in the hybrid were encapsulated by a thin carbon film.The Fe2O3@G‐C‐900composite was highly active and stable for the direct selective hydrogenation of nitroarenes to anilines under mild conditions,where previously noble metals were required.The synthetic strategy and the structure of the iron oxide‐based composite may lead to the advancement of cost‐effective and sustainable industrial processes.展开更多
In this paper iron complex with 5,10,15,20-tetraphenyl porphyrin inside NaX zeolite nanocages was capsuled. All synthesized homogeneous and heterogeneous catalysts were applied for epoxidation of α-pinene. It has bee...In this paper iron complex with 5,10,15,20-tetraphenyl porphyrin inside NaX zeolite nanocages was capsuled. All synthesized homogeneous and heterogeneous catalysts were applied for epoxidation of α-pinene. It has been shown that hydrophobic porphyrins are anchored inside the zeolite pores according to flexible ligand method. It also has been examined that capsulation of metalloporphyrins inside the pores of solid supports change catalytic activity and stability. All catalysts were characterized by Fourier transform infrared （FTIR）, UV/Vis diffuse reflectance spectroscopic （DRS）, scanning electron microscopy （SEM） analyses to confirm the complexes immobilization.展开更多
基金supported by the National Natural Science Foundation of China(21473155,21273198)Natural Science Foundation of Zhejiang Province(LZ12B03001)~~
文摘Iron catalysis has attracted a wealth of interdependent research for its abundance,low price,and nontoxicity.Herein,a convenient and stable iron oxide(Fe2O3)‐based catalyst,in which active Fe2O3nanoparticles(NPs)were embedded into carbon films,was prepared via the pyrolysis of iron‐polyaniline complexes on carbon particles.The obtained catalyst shows a large surface area,uniform pore channel distribution,with the Fe2O3NPs homogeneously dispersed across the hybrid material.Scanning electron microscopy,Raman spectroscopy and X‐ray diffraction analyses of the catalyst prepared at900°C(Fe2O3@G‐C‐900)and an acid‐pretreated commercial activated carbon confirmed that additional carbon materials formed on the pristine carbon particles.Observation of high‐resolution transmission electron microscopy images also revealed that the Fe2O3NPs in the hybrid were encapsulated by a thin carbon film.The Fe2O3@G‐C‐900composite was highly active and stable for the direct selective hydrogenation of nitroarenes to anilines under mild conditions,where previously noble metals were required.The synthetic strategy and the structure of the iron oxide‐based composite may lead to the advancement of cost‐effective and sustainable industrial processes.
文摘In this paper iron complex with 5,10,15,20-tetraphenyl porphyrin inside NaX zeolite nanocages was capsuled. All synthesized homogeneous and heterogeneous catalysts were applied for epoxidation of α-pinene. It has been shown that hydrophobic porphyrins are anchored inside the zeolite pores according to flexible ligand method. It also has been examined that capsulation of metalloporphyrins inside the pores of solid supports change catalytic activity and stability. All catalysts were characterized by Fourier transform infrared （FTIR）, UV/Vis diffuse reflectance spectroscopic （DRS）, scanning electron microscopy （SEM） analyses to confirm the complexes immobilization.
