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On the Location Effect in a Photocatalytic Hybrid System of Metal–Organic Framework Interfaced with Semiconductor Nanoparticles
Qichao Shang
Author NameAffiliationE-mail
Qichao Shang Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China sqc2012@mail.ustc.edu.cn 
Abstract:
We report an ultrafast spectroscopy investigation that addresses the subtle location effect in a prototypical semiconductor–MOF hybrid system with TiO2 nanoparticles being incorporated inside or supported onto Cu3(BTC)2, denoted TiO2@Cu3(BTC)2 and TiO2/Cu3(BTC)2, respectively. By tracking in real time the interface electron dynamics in the hybrid system, we find that the interface states formed between TiO2 and Cu3(BTC)2 can act as an effective relay for electron transfer, whose efficiency rests on the relative location of the two components. It is such a subtle location effect that brings on difference in photocatalytic CO2 reduction using the two semiconductor–MOF hybrids. The mechanistic understanding of the involved interface electron-transfer behavior and effect opens a helpful perspective for rational design of MOF-based hybrid systems for photoelectrochemical applications.
Key words:  Metal–organic framework, Photocatalysis, Ultrafast spectroscopy, Transient absorption
FundProject:
On the Location Effect in a Photocatalytic Hybrid System of Metal–Organic Framework Interfaced with Semiconductor Nanoparticles
Qichao
摘要:
We report an ultrafast spectroscopy investigation that addresses the subtle location effect in a prototypical semiconductor–MOF hybrid system with TiO2 nanoparticles being incorporated inside or supported onto Cu3(BTC)2, denoted TiO2@Cu3(BTC)2 and TiO2/Cu3(BTC)2, respectively. By tracking in real time the interface electron dynamics in the hybrid system, we find that the interface states formed between TiO2 and Cu3(BTC)2 can act as an effective relay for electron transfer, whose efficiency rests on the relative location of the two components. It is such a subtle location effect that brings on difference in photocatalytic CO2 reduction using the two semiconductor–MOF hybrids. The mechanistic understanding of the involved interface electron-transfer behavior and effect opens a helpful perspective for rational design of MOF-based hybrid systems for photoelectrochemical applications.
关键词:  Metal–organic framework, Photocatalysis, Ultrafast spectroscopy, Transient absorption
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