The photocatalytic sterilization activity of polymeric carbon nitride is closely related to its microstructure. In this study, four kinds of polymeric carbon nitride were prepared with melamine, dicyandiamine, thiourea and urea as precursors respectively. | Environmental Advances 4 2021 100067 Contents lists available at ScienceDirect Environmental Advances journal homepage locate envadv Metal-free polymeric carbon nitride photocatalytic bactericide precursor-controlled killing activity of E. coli Shan Ding a b Yan Li a b c Tao Sun a b c Bin Xue a b c a Department of Chemistry College of Food Science and Technology Shanghai Ocean University Shanghai 201306 China b Quality Supervision Inspection and Testing Center for Cold Storage and Refrigeration Equipment Shanghai Ministry of Agriculture Shanghai 201306 China c National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai 201306 China a r t i c l e i n f o a b s t r a c t Keywords The photocatalytic sterilization activity of polymeric carbon nitride is closely related to its microstructure. In Polymeric carbon nitride this study four kinds of polymeric carbon nitride were prepared with melamine dicyandiamine thiourea and Precursor urea as precursors respectively. These polymeric carbon nitrides were similar in crystallinity and bonding but Microstructure differ significantly in texture optical and photoelectrochemical properties. These changes resulted in different Photocatalysis performances of polymeric carbon nitrides in their photocatalytic activities to kill E. coli. The polymeric carbon Antibacterial nitride prepared from urea exhibited significantly better photocatalytic antibacterial activity than other control samples. The advantage of the activity should be attributed to the synergy of many favorable factors such as the shape of flake large specific surface area open pore structure high valence band potential low photogenerated carrier recombination rate large photocurrent density and low electron transfer impedance. This study showed that urea-derived polymeric carbon nitride is very promising for the preparation advanced materials with higher photocatalytic sterilization activity. 1. .
