光催化
掺杂剂
兴奋剂
氯
带隙
溶剂热合成
反应速率常数
材料科学
降级(电信)
光电子学
化学
无机化学
动力学
催化作用
冶金
有机化学
电子工程
工程类
物理
量子力学
作者
Mengyu Cao,Ke Wang,Ignacio Tudela,Xianfeng Fan
标识
DOI:10.1016/j.apsusc.2020.147784
摘要
Cl doped g-C3N4 with controllable doping site is synthesised for the first time via an agitation-assisted solvothermal method. It is found that both the molecular and electronic structure of the prepared g-C3N4 correlates strongly with the atomic ratio of interstitial to substitutional Cl dopants (Clint/Clsub), which is determined by the agitation rate during the solvothermal synthesis. Due to the different effects of Clint and Clsub on the electronic/molecular structure of g-C3N4, the photocatalytic activity of g-C3N4 can only be optimised by balancing the concentration of Clint and Clsub dopants. The optimal synthesis condition for Cl-doped g-C3N4 is associated with a moderate agitation rate of 60 rpm (60-C3N4). Under 60 rpm agitation during the synthesis, the 60-C3N4 exhibits remarkably larger specific surface area, stronger photo-oxidation capability, reduced bandgap and suppressed electron-hole recombination comparing with the control group g-C3N4 synthesised via conventional thermal polycondensation method. An outstanding photocatalytic RhB degradation performance is therefore observed for 60-C3N4 with ~ 35-fold higher pseudo-first reaction rate constant than the bulk g-C3N4 control group sample.
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