化学
氧气
石墨氮化碳
兴奋剂
吸附
催化作用
无机化学
光催化
阿特拉津
光化学
臭氧
材料科学
有机化学
光电子学
杀虫剂
生物
农学
作者
Jing Zhang,Xin Bo,Chao Shan,Weimin Zhang,Dionysios D. Dionysiou,Bingcai Pan
标识
DOI:10.1016/j.apcatb.2021.120155
摘要
Graphitic carbon nitride (g-C3N4) with varied oxygen doping levels was fabricated to investigate the quantitative relationship between oxygen-containing groups and activity of catalytic ozonation employing atrazine as a model pollutant. The regulation on both the types and the amounts of different oxygen-containing groups (CO/CO/COOH) were achieved by simply varying the dosage of the oxalate precursor. The regression analysis showed that the increase of CO/CO groups within appropriate range promoted the catalytic activity for ozonation, while the presence of carboxyl groups induced by excessive oxygen doping exhibited adverse effect. Moreover, the corresponding quantitative structure-activity relationships were established. The electron-rich O centers of oxygen doped g-C3N4 (CO/CO) were identified as the active sites for catalytic ozonation, and the enhanced adsorption of ozone on the active sites were substantiated by DFT calculations. This study is believed to shed light upon the roles of different oxygen-containing functional groups in catalytic ozonation by carbonaceous catalysts.
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