电负性
掺杂剂
光催化
碳纤维
石墨氮化碳
兴奋剂
光化学
可见光谱
电子结构
材料科学
氮化碳
共轭体系
吸附
价(化学)
载流子
化学
计算化学
催化作用
光电子学
聚合物
有机化学
复合材料
复合数
作者
Qingting Huang,Qiuju Li,Chengcheng Chu,Qiong Liu,Zhuo Li,Shun Mao
标识
DOI:10.1016/j.cej.2024.149155
摘要
Graphitic carbon nitride (CN) is a promising candidate for visible-light CO2 photoreduction, but suffers severe charge recombination due to its intrinsic π-conjugated skeleton. Herein, exogenous phosphorous (P) and carbon (C) are co-doped into the polymeric structure of CN to modulate the electronic structure. In virtue of the different electronegativity and valence electron structure of the co-dopants, an internal driving force is formed within the π-conjugated framework, which greatly accelerates the charge transfer and separation. The P and C co-doped CN (PCCN) exhibits a significantly improved CH4 evolution rate (41.85 μmol g−1h−1) under visible light irradiation, which is 12.5 times higher than the pristine CN. The P and C co-doping causes enhanced light absorption, promoted CO2 adsorption as well as inbuilt charge centers for efficient charge separation. This work offers new insights into the mutual effect of co-dopants on electronic structure rearrangement of novel photocatalysts for elevated photocatalytic activity.
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