Iron/sulfur co doped graphite phase carbon nitride and its photocatalytic performance
Graphite phase carbon nitride(Fe/S-CN)catalyst with iron/sulfur co-doping was prepared by hot polymerization with melamine,thiocyanic acid and ferric nitrate as raw materials.The intermediates and the obtained Fe/S-CN catalysts were characterized by TEM,XRD,FT-IR and EIS.The results showed that the Fe/sulfur-doped nano-thin layer materials were formed by the hot polymerization of melamine and polythiocyanic acid.The photocatalytic performance of Fe/S-CN was investigated using BPA as the target pollutant in water.2%Fe/S-CN had the best pollutant degradation activity under simulated sunlight conditions,and the degradation rate of 20 mg/L BPA was up to 92.8%after 3 h of illumination,which was significantly better than sulfur-doped graphite phase carbon nitride and bulk graphite phase carbon nitride.The results of photocurrent and electrochemical impedance show that Fe/S doping improves the separation efficiency of photogenerated electron-hole pairs.The EIS results showed that metal modification and non-metal doping improved the carrier transport performance and facilitated carrier separation.Free radical quenching experiments confirmed that photogenerated holes,singlet oxygen and superoxide free radicals were the main active species of Fe/S-CN photocatalyzed bisphenol A REDOX reaction.
graphitic carbon nitrideiron/sulfur co-dopinglight catalysisbisphenol A
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