光催化
介孔材料
材料科学
异质结
可见光谱
八面体
化学工程
基质(水族馆)
纳米技术
催化作用
无机化学
晶体结构
化学
结晶学
光电子学
有机化学
地质学
工程类
海洋学
作者
Siyi Su,Zipeng Xing,Shiyu Zhang,Meng Du,Yu Wang,Zhenzi Li,Peng Chen,Qi Zhu,Wei Zhou
标识
DOI:10.1016/j.apsusc.2020.147890
摘要
Ultrathin mesoporous g-C 3 N 4 /NH 2 -MIL-101(Fe) octahedron heterojunctions photocatalyst is fabricated via facile self-assembly strategy and exhibits excellent visible-light-driven photocatalytic performance, which could be attributed to the exfoliation of ultrathin mesoporous g-C 3 N 4 increasing more active sites and the coupling effect of photocatalysis with Fenton-like system. • Ultrathin mesoporous g-C 3 N 4 /NH 2 -MIL-101(Fe) photocatalyst is synthesized. • Ultrathin mesoporous g-C 3 N 4 promotes the generation of H 2 O 2 . • It exhibits excellent photocatalytic performance and photo-thermal effect. • It owes to the coupling effect of photocatalysis and Fenton-like system. Ultrathin mesoporous g-C 3 N 4 /NH 2 -MIL-101(Fe) octahedron heterojunctions photocatalysts are successfully constructed through the solvothermal method of loading the ultrathin mesoporous g-C 3 N 4 (U-g-C 3 N 4 ) onto NH 2 -Iron metal-organic framework (Fe-MOF). The homogeneous growth of U-g-C 3 N 4 on NH 2 -MIL-101(Fe) is not only distinctly conducive to the illumination to MOF substrate but also the diffusion of reactants and products. Due to the presence of iron trivalent in Fe-MOF, the Fenton-like system is formed, which can further promote the photocatalytic efficiency. The optimum heterojunction photocatalyst, M101-U 6 (6% mass ratio of ultrathin g-C 3 N 4 ), reveals a highest photocatalytic efficiency to degrade 2,6-dichlorophen and 2,4,5-trichlorophenol, up to 98.7 and 97.3% respectively within 3 h. Meanwhile, the yield of hydrogen peroxide for M101-U 6 is raised to 69 μM within 3 h, about 2.2 times superior to the single ultrathin g-C 3 N 4 , significantly promoting the formation of hydroxyl radicals. In addition, the photo-thermal effect of M101-U 6 is enhanced for this heterojunction photocatalyst and Fenton-like coupling system, which could further improve the photocatalytic degradation performance. This two-in-one strategy of combining photocatalysis with Fenton-like has broad prospects on establishing novel photocatalysts for eliminating high-toxic organic pollutants and generating O 2 concurrently in aquatic environment.
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