CdSe QDs@ Fe-based metal organic framework composites for improved photocatalytic RhB degradation under visible light

被引：37
作者：
Zhang, Yue [1 ]
Li, Gang [1 ]
Guo, Qiuyu [1 ]
机构：
[1] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, 2 Ling Gong Rd, Dalian 116024, Peoples R China
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2021年 / 324卷
关键词：
CdSe quantum Dots; Fe-BDC; Composites; Photocatalytic degradation; RhB; Visible-light irradiation; DRIVEN PHOTODEGRADATION; CO2; ADSORPTION; NANOCOMPOSITE; PERFORMANCE; REDUCTION; OXIDATION; SERIES; WATER;
D O I：
10.1016/j.micromeso.2021.111291
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A series of composites based on Fe-based MOF (Fe-BDC) and CdSe quantum dots (CdSe QDs) have been synthesized with CdSe QDs well-embedded into Fe-BDC particles, which are characterized by XRD, SEM, TEM, ICPOES, FT-IR, N2 physical sorption, UV-visible DRS, PL and electrochemical measurements. By detecting the degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation, the photocatalytic performance of CdSe@Fe-BDC nanocomposites were apparently improved by 5.8 times relative to single Fe-BDC, which can be attributed to the heterostructure formed in CdSe@Fe-BDC. Owing to the perfect interfacial contact, this promotes electron transfer from CdSe to Fe-BDC and significantly facilitates the separation of the photogenerated electron-hole pairs. The photocatalytic mechanism studied by adding sacrificial agents revealed that the predominant active species in the system is hole cation (h(+)) and oxygen free radicals (center dot O-2(-)).
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页数：10
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