Abstract
Nitrogen-doped carbon(N-C)materials have demonstrated exceptional performances in activating perox-ymonosulfate(PMS)for environmental remediation.However,accommodating higher nitrogen contents remains challenging in N-C due to the thermodynamic instability of C-N skeleton.In this study,we pro-posed an innovative epitaxial growth approach to synthesize two-dimensional N-C nanosheets.Leverag-ing the abundant amino groups supplied by the polymer dots as growing sites,we successfully attained a high nitrogen level and spontaneously introduced abundant structural defects in the carbon framework.The resulting N-C nanosheets exhibited outstanding catalytic activity for the activation of PMS toward selective oxidation of diethyl 1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate(1,4-DHP)into diethyl 2,6-dimethylpyridine-3,5-dicarboxylate,which serves as a valuable intermediate in the synthesis of vari-ous pharmaceutical compounds.Comprehensive experimental and characterization investigations verified that the nitrogen sites and defects are the primary active sites for PMS activation and selective oxidation of 1,4-DHP.This work offered an efficient approach for the fabrication of high-nitrogen-loading carbon materials for catalytic oxidation reactions.
维普
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