期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 262, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118202
关键词
Mesoporous material; Photocatalysis; Tandem heterojunctions; Hierarchical structure; Surface defect
资金
- National Natural Science Foundation of China [21871078, 51672073]
- Natural Science Foundation of Heilongjiang Province [B2018010]
- Heilongjiang Postdoctoral Startup Fund [LBH-Q14135]
- Heilongjiang University Science Fund for Distinguished Young Scholars [JCL201802]
- Youth Science and Technology Innovation Team Project of Heilongjiang Province [2018-KYYWF-1593]
Defective-rich and electron-rich mesoporous NH2-MIL-125(Ti)@ZnIn2S4/CdS hierarchical tandem heterojunctions were fabricated through two-step solvothermal and one-step hydrothermal strategies. The interface with electron enrichment can cause active interface reaction, fast transfer and separation of charge carriers and restrain the photocorrosion of CdS. ZnIn2S4, as a bridge to connect Ti-MOFs and CdS, favors the separation of charge carriers and forms tandem heterojunctions. The as-prepared photocatalyst has a relative large surface area of similar to 877.0 m 2 g(-1) and a narrow band gap of similar to 1.84 eV, which could absorb visible light efficiently. Furthermore, it exhibits a high photocatalytic hydrogen generation rate which was increased to 2.367 mmol g(-1) h(-1) and the high photocatalytic degradation efficiency for 2,6-dichlorophen and 2,4,5-trichlorophenol which were 98.6% and 97.5%, respectively. Additionally, recycling text for several cycles indicates the high stability. This novel Ti-MOFs based core@shell hierarchical tandem heterojunctions may offer a new insight for fabricating high-performance heterojunctions for multi-channel charges transfer.
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