Metal-organic framework-derived three-dimensional CoSe2/Cd0.8Zn0.2S Schottky junction for highly efficient photocatalytic H2 evolution

Li，Guojun1; Du，Shiwen1,2; Han，Ziwu1; Wang，Yumin1; Zhang，Siyi1; Xiong，Yi1; Xu，Hu3; Fang，Pengfei1

2022-08-15

10.1016/j.apsusc.2022.153420

APPLIED SURFACE SCIENCE   影响因子和分区

0169-4332

1873-5584

The well-designed interface plays a key role in enhancing the charge transfer kinetics. In this work, a three-dimensional CoSe/CdZnS Schottky junction was successfully prepared using zeolitic imidazolate framework-67 (ZIF-67) as precursor material by in-situ chemistry synthetic strategies to improve the charge transfer kinetics. The photocatalytic H generation rate of 3.2%-CoSe/CdZnS is 80 times higher than pristine CdZnS. The systematic characterization (XPS, TRPL, EPR, etc.) and DFT results show the improvement of photocatalytic performance derives from the formation of Schottky junction between CoSe and CdZnS. The well-designed and tight interface can facilitate electrons transfer from CdZnS to CoSe, and Schottky barrier can suppress the electrons flow back to CdZnS, resulting in the high separation of charge carriers. On the other hand, the noble metal-free CoSe with larger specific surface area function as the electron acceptors and active sites for reducing H to H efficiently, thus in favor of obtaining the enhanced H generation performance. Combining the three-dimensional structure with Schottky junction, this work provides an effective strategy to prepare photocatalysts.

DFT calculations EPR Photocatalytic H2 evolution Schottky junction ZIF-67 derived-CoSe2

SCI ; EI

英语

其他

National Key R&D Pro-gram of China[2019YFA0210003] ; National Natural Science Foundation of China[11927808]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter

WOS:000806404900003

ELSEVIER

20221712036584

Cadmium compounds ; Charge transfer ; Organometallics ; Precious metals ; Schottky barrier diodes ; Zinc compounds

Precious Metals:547.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Reactions:802.2 ; Organic Compounds:804.1

MATERIALS SCIENCE

2-s2.0-85128723527

Scopus

1.School of Physics and Technology,Key Laboratory of Nuclear Solid State Physics Hubei Province,Wuhan University,Wuhan,430072,China
2.State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Li，Guojun,Du，Shiwen,Han，Ziwu,et al. Metal-organic framework-derived three-dimensional CoSe2/Cd0.8Zn0.2S Schottky junction for highly efficient photocatalytic H2 evolution[J]. APPLIED SURFACE SCIENCE,2022,593.

Li，Guojun.,Du，Shiwen.,Han，Ziwu.,Wang，Yumin.,Zhang，Siyi.,...&Fang，Pengfei.(2022).Metal-organic framework-derived three-dimensional CoSe2/Cd0.8Zn0.2S Schottky junction for highly efficient photocatalytic H2 evolution.APPLIED SURFACE SCIENCE,593.

Li，Guojun,et al."Metal-organic framework-derived three-dimensional CoSe2/Cd0.8Zn0.2S Schottky junction for highly efficient photocatalytic H2 evolution".APPLIED SURFACE SCIENCE 593(2022).