K^+掺杂g-C3N4污泥基复合材料的制备及其光催化性能

Preparation and photocatalytic performance of potassium doped g-C3N4 sludge-based composite

以水性油墨废水絮凝污泥、三聚氰胺和K2CO3为原料,采用煅烧法制备了K^+掺杂石墨相氮化碳污泥基复合材料(AC/K-CN),利用XRD、UV-Vis DRS、FTIR、XPS、BET、SEM和PL光谱对AC/K-CN的晶体结构、形貌和光电性能进行了表征。可见光照射下,将AC/K-CN用于光催化降解阳离子蓝X-GRRL。结果表明,AC/K-CN对阳离子蓝X-GRRL的光催化活性明显高于纯石墨相氮化碳(g-C3N4)或碳化污泥(AC),这归因于AC/K-CN有效的电子-空穴分离。与AC和纯g-C3N4相比,AC/K-CN在模拟日光下对质量浓度为20 mg/L的阳离子蓝X-GRRL的降解率分别提高了43.17%和46.76%。

K+doped graphitic phase carbon nitride sludge-based composite(AC/K-CN)was prepared by calcination method using flocculation sludge of water-based ink wastewater,melamine and potassium carbonate as raw materials.The crystal structure,morphology and photoelectric properties of the composite were characterized by XRD,UV-Vis DRS,FTIR,XPS,BET,SEM and PL.The composite was applied to remove cationic blue X-GRRL from aqueous solution under visible-light irradiation.The results showed that the photocatalytic activity of AC/K-CN on cationic blue X-GRRL was higher than that of pure graphite phase carbon nitride(g-C3N4)or carbonized sludge(AC),which is attributed to the effective electron-hole separation of the composite.Compared with AC and pure g-C3N4,AC/K-CN composite increased the degradation rate of cationic blue X-GRRL with a mass concentration of 20 mg/L by 43.17%and 46.76% under simulated sunlight.