
1. 南华大学核科学技术学院
2. 南华大学创新创业学院
Published:2025
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于明玥, 郝帅, 黄文珑, et al. 改性介孔石墨相氮化碳(g-C3N4)材料的构筑及其光催化还原U(Ⅵ)性能研究[J]. 2025, 45(1): 10-24.
于明玥, 郝帅, 黄文珑, et al. 改性介孔石墨相氮化碳(g-C3N4)材料的构筑及其光催化还原U(Ⅵ)性能研究[J]. 2025, 45(1): 10-24. DOI: 10.20190/j.cnki.02580918.202501002.
以纳米二氧化硅为硬模板、三聚氰胺为前驱体,通过热缩聚法高温制备了石墨相氮化碳的低聚物密勒胺(melem)
采用扫描电子显微镜(SEM)、氮气吸脱附(BET)、傅里叶变换红外分析(FITR)、X射线衍射(XRD)等对其进行了表征,并研究了其光催化还原U(Ⅵ)的性能。结果表明,melem/g-C
3
N
4
复合材料具有介孔结构,三聚氰胺和二氧化硅比例为2∶1的复合材料比表面积比原石墨相氮化碳提高约16倍;在可见光下,对于U(Ⅵ)的光催化还原率达到了94.8%
约是原石墨相碳化氮材料的两倍;其还原反应速率常数为0.011 7 min
-1
约为原g-C
3
N
4
(0.003 4 min
-1
)的3.5倍;其禁带宽度缩窄,可见光吸收范围从约450 nm拓宽至500 nm
具备较高的稳定性和优异的光催化还原性能。
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