Study on photocatalytic degradation of aqueous pollutants by a novel two-dimensional red carbon modified g-C3N4 composite photocatalyst
WANG Min
FANG Jinghong
FENG Jianguang
SUN Qiong
Abstract：In this study,two-dimensional red carbon(RC)was prepared by a reflux method,and further combined with graphite carbon nitride(g-C3N4)by simple mechanical agitation to obtain a new composite photocatalyst(RCCN).RCCN presented a typical two-dimensional lamellar structure,and a lower carrier recombination rate and charge transfer resistance than g-C3N4.Therefore,under simulated sunlight irradi-ation,the composite exhibited excellent photocatalytic activity,and the highest apparent kinetic constant(0.038 6 min-1)of organic degradation reaction was more than twice of g-C3N4.Both free radical quench-ing experiment and electron paramagnetic resonance spectra showed that the composite material can pro-duce more active free radicals after excitation to participate in the oxidative degradation of organic matters.Combined with the electron transfer route,a low-resistance channel was formed between g-C3N4 and RC,allowing electrons to be transferred directionally from the conduction band of g-C3N4 to the valence band of RC,that is,the photoinduced charge transfer belonged to a typical Z-type heterostructure.Therefore,the reduced carrier recombination rate and the increased active substances greatly improved the photocatalytic activity of the RCCN,which provided a new idea for the purification of pollutants in water.
Keywords：two-dimensional red carbong-C3N4photocatalysisZ-type heterojunction
Publication Date：2025-08-01
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：11( 554-564 )