Abstract
Fe-containing carbon nitrides (Fe–CN) prepared with various CN precursors, including dicyandiamide, melamine, guanidine hydrochloride and urea, were characterized by X-ray diffraction, thermal gravimetric analysis, N2 physisorption, transmission electron microscopy, X-ray photoelectron spectroscopy and atomic emission spectrometer measurements, and used as catalysts to catalyze the rhodamine B oxidation with H2O2 as oxidant. Characteristic results showed that Fe–CN exhibits different compositions, properties and catalytic performances if different CN precursors are used. The Fe–CN prepared from dicyandiamide contains mainly CN phase and certain amounts of surface Fe2O3 phase, exhibits the best activity; while that prepared from urea contains mainly Fe2O3 phase and few amounts of CN phase, exhibits the worst activity. Contrasting experiments conducted under light irradiation, with a supported Fe/CN_D catalyst, and that using a washed catalyst, suggested that the surface Fe2O3 is the active site of the reaction.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 21203254
Award Identifier / Grant number: 21601128
Funding statement: Finance support from the National Natural Science Foundation of China (No. 21203254, 21601128), the Natural Science Foundation of Liaoning Province of China (201602681), the Shenyang Municipal Science and Technology Planning projects (17-76-1-00) and the Shenyang Normal University Excellent Talent Support Program (51600203, 51600210, 41500108002), is gratefully acknowledged. The authors acknowledge the supports from the Engineering Technology Research Center of Catalysis for Energy and Environment, Major Platform for Science and Technology of the Universities in Liaoning Province, Liaoning Province Key Laboratory for Highly Efficient Conversion and Clean Utilization of Oil and Gas Resources, and the Engineering Research Center for Highly Efficient Conversion and Clean Use of Oil and Gas Resources of Liaoning Province.
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Supplementary Material
The online version of this article offers supplementary material (DOI: https://doi.org/10.1515/zpch-2018-1221).
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