光催化
结晶度
材料科学
煅烧
石墨氮化碳
制氢
傅里叶变换红外光谱
可见光谱
氮化碳
兴奋剂
核化学
氢
分析化学(期刊)
催化作用
化学
化学工程
复合材料
有机化学
工程类
光电子学
作者
Faten Saman,Hasliza Bahruji,Hilalina Mahadi
出处
期刊:IOP conference series
[IOP Publishing]
日期:2022-02-01
卷期号:997 (1): 012018-012018
标识
DOI:10.1088/1755-1315/997/1/012018
摘要
Abstract Crystalline carbon nitride (C-C 3 N 4 ) doped with cerium oxide (CeO 2 ) was synthesized using ionothermal method to increase the photocatalytic activity for H 2 production. Graphitic carbon nitride (g-C 3 N 4 ) obtained from direct pyrolysis of urea at 550°C was subsequently annealed with a mixture of KCl and LiCl to obtain C-C 3 N 4 . CeO 2 was doped onto C-C 3 N 4 and g-C 3 N 4 via calcination at 550°C. XRD analysis showed the formation of high intensity C 3 N 4 and CeO 2 peaks in C-C 3 N 4 /CeO 2 , meanwhile g-C 3 N 4 /CeO 2 only showed CeO 2 peaks. FTIR analysis confirmed all the samples contained C 3 N 4 polymeric structure. The specific surface area of g-C 3 N 4 was measured at 61 m 2 /g. The surface area increased to 92 m 2 /g when g-C 3 N 4 transformed into C-C 3 N 4 , and further increased to 106 m 2 /g on C-C 3 N 4 /CeO 2 . The photocatalytic activity for H 2 gas production showed significant increase of H 2 rate on C-C 3 N 4 /CeO 2 compared to g-C 3 N 4 /CeO 2 and g-C 3 N 4 . The high crystallinity and high surface area were suggested to enhance photocatalytic activity of C-C 3 N 4 /CeO 2 in visible light presumably due to the increase of electron and hole lifetimes.
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