Co-construction of oxygen vacancies and heterojunctions on CeO2 via one-step Fe doping for enhanced photocatalytic activity in Suzuki reaction

被引：40
作者：
Liu, Bo [1 ,2 ]
Yan, Zhe [3 ]
Xu, Tong [1 ,2 ]
Li, Chunping [1 ,2 ]
Gao, Rui [3 ]
Hao, Haigang [1 ,3 ]
Bai, Jie [1 ,2 ]
机构：
[1] Inner Mongolia Univ Technol, Chem Engn Coll, Hohhot 010051, Peoples R China
[2] Inner Mongolia Key Lab Ind Catalysis, Hohhot 010051, Peoples R China
[3] Inner Mongolia Univ, Collage Chem & Chem Engn, Hohhot 010021, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2022年 / 442卷
基金：
中国国家自然科学基金;
关键词：
Double-layered nanotube; Doping engineering; Oxygen vacancy; Heterojunction; Suzuki reaction; MIYAURA COUPLING REACTIONS; PALLADIUM; CATALYST; NANOPARTICLES; PERFORMANCE; REDUCTION; CHLORIDES; NANORODS; CLUSTERS; METHANOL;
D O I：
10.1016/j.cej.2022.136226
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Photocatalytic Suzuki reaction is attractive for utilization of renewable solar energy to produce biphenyl com-pounds at ambient temperature. Herein, a unique and controllable strategy is used to simultaneously create surface oxygen vacancies and interface heterojunctions on CeO(2 )with double-layered nanotube morphology via one-step Fe doping engineering. The double-layered structure can improve light receiving areas of supports, meanwhile expose sufficient active sites (Pd). The abundant oxygen vacancies on the surface of CeO2 and the CeO2@Fe2O3 heterojunctions tremendously extend response region of visible light and promote separation of photoinduced electron-hole pairs. The directional transfer of electrons induced by Fe doping to Pd accelerates the oxidative addition in Suzuki reactions, finally achieves high catalytic activity for biphenyl products with a turnover frequency (TOF) of 1770 h(-1) under visible light at ambient temperature, about 35 times higher than that of reaction without illumination.
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页数：12
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