Porphyrin-based covalent triazine framework and its carbonized derivative as catalyst scaffold of Au and Ag nanoparticles for 4-nitrophenol reduction

Abstract

Porous carbon with abundant nitrogen doping (C-PCTF) was obtained by using porphyrin-based covalent triazine framework (PCTF) as the carbonization precursor. As expected, C-PCTF inherits the porous structure and the chemical composition of the PCTF. Due to the high surface area and accessible nitrogen sites, the carbon material can be employed as a superior supporting substrate to immobilize Au and Ag nanoparticles. Both the Au@C-PCTF and Ag@C-PCTF nanocatalysts show good catalytic activity in the reduction of 4-nitrophenol. Especially for Ag@C-PCTF, the catalytic activity is higher than most of other metal-catalysts reported previously. This study would provide a new strategy to use various porous organic polymers in fabricating carbon-supported heterogeneous catalysts. 1. Nitrogen-rich porous carbon derived from the porphyrin-based covalent triazine framework was synthesized. 2. Au and Ag nanoparticles were evenly dispersed on the surface of the porous carbon or polymer. 3. These nanocatalysts showed great catalytic activity in 4-nitrophenol reduction