Construction of CdLa2S4/MIL-88A(Fe) heterojunctions for enhanced photocatalytic H2-evolution activity via a direct Z-scheme electron transfer

被引：70
作者：
Chen, Qian [1 ]
Li, Juan [1 ]
Cheng, Lin [1 ]
Liu, Hong [1 ]
机构：
[1] Shanghai Univ, Sch Environm & Chem Engn, Dept Chem Engn, 99 Shangda Rd, Shanghai 200444, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2020年 / 379卷
基金：
中国国家自然科学基金;
关键词：
CdLa2S4; MIL-88A(Fe); Photocatalyst; Z-scheme; Hydrogen; METAL-ORGANIC FRAMEWORKS; GRAPHITIC CARBON NITRIDE; H-2; EVOLUTION; G-C3N4; HYBRIDS; EFFICIENT; DEGRADATION; COMPOSITE; PERFORMANCE; WATER; NANOCOMPOSITES;
D O I：
10.1016/j.cej.2019.122389
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A novel Z-scheme CdLa2S4/MIL-88A(Fe) heterojunction was successfully designed and fabricated through loading CdLa2S4 on MIL-88A(Fe). The phase, morphologies, microstructures, and photoelectric characteristics of the constructed Z-scheme photocatalyst were investigated in detail. The photocatalytic activity of the obtained material under visible light was assessed via the photocatalytic H-2 generation. It was shown that the CdLa2S4 nanoparticles were uniformly anchored on the MIL-88A(Fe) microrods with an intimate interface. With such a unique structure, the obtained CdLa2S4/MIL-88A(Fe) composites demonstrated excellent photocatalytic H-2-evolution performance. When the content of MIL-88A(Fe) was 20 wt%, the CdLa2S4/MIL-88A(Fe) presented the maximal H-2-generation rate of 7677.5 mu mol.h(-1).g(-1) (apparent quantum yield of 10.3% at 420 nm), which was nearly 7.73 times that of pristine CdLa2S4. The high photocatalytic activity was mainly contributed to the formed Z-scheme structure which facilitated the separation of photoexcited electron-hole pairs.
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页数：10
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