Details
| Original language | English |
|---|---|
| Pages (from-to) | 78-90 |
| Number of pages | 13 |
| Journal | Catalysis today |
| Volume | 335 |
| Early online date | 29 Oct 2018 |
| Publication status | Published - 1 Sept 2019 |
Abstract
Heterogeneous photocatalysis mediated by semiconducting TiO 2 has attracted continuous interest during the past decades and has shown great potentials in environmental remediation and solar energy conversion. Basically, photocatalysis is initiated by the TiO 2 excitation. The generated charge carriers undergo trapping, recombination, and interfacial transfer before proceeding the redox reaction at TiO 2 surface. Monitoring the charge carrier dynamics is of particulate importance for understanding the underlying mechanism and designing efficient photocatalysts. This review overviews the recent progress in characterization of charge carrier dynamics. We will present the analytic techniques for monitoring the fate of charge carriers at each elementary photocatalytic step, including charge carrier generation, trapping and recombination inside the photocatalyst, as well as the interfacial charge transfer. The charge carrier dynamics at TiO 2/H 2O interface, hole transfer reactions for O 2 production, and photocatalytic oxidation of organic compounds and nitric oxides, and electron transfer reactions for photocatalytic reduction of viologens and metal ions are addressed, aiming at a deeper understanding of photocatalytic process.
Keywords
- Charge carrier dynamics, EPR spectroscopy, Electron transfer, Semiconductor photocatalysis, TiO, Transient spectroscopy
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
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In: Catalysis today, Vol. 335, 01.09.2019, p. 78-90.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Charge carrier trapping, recombination and transfer during TiO2 photocatalysis
T2 - An overview
AU - Qian, Ruifeng
AU - Zong, Huixin
AU - Schneider, Jenny
AU - Zhou, Guanda
AU - Zhao, Ting
AU - Bahnemann, Detlef
AU - Pan, Jia Hong
AU - Li, Yongli
AU - Yang, Jing
N1 - Funding information: This work is supported by the National Nature Science Foundation of China (No. 51772094), Fundamental Research Funds for the Central Universities (No. JB2016ZZD04) and Beijing Natural Science Foundation (No. 2172052) This work is supported by the National Nature Science Foundation of China (No. 51772094 ), Fundamental Research Funds for the Central Universities (No. JB2016ZZD04 ) and Beijing Natural Science Foundation (No. 2172052 )
PY - 2019/9/1
Y1 - 2019/9/1
N2 - Heterogeneous photocatalysis mediated by semiconducting TiO 2 has attracted continuous interest during the past decades and has shown great potentials in environmental remediation and solar energy conversion. Basically, photocatalysis is initiated by the TiO 2 excitation. The generated charge carriers undergo trapping, recombination, and interfacial transfer before proceeding the redox reaction at TiO 2 surface. Monitoring the charge carrier dynamics is of particulate importance for understanding the underlying mechanism and designing efficient photocatalysts. This review overviews the recent progress in characterization of charge carrier dynamics. We will present the analytic techniques for monitoring the fate of charge carriers at each elementary photocatalytic step, including charge carrier generation, trapping and recombination inside the photocatalyst, as well as the interfacial charge transfer. The charge carrier dynamics at TiO 2/H 2O interface, hole transfer reactions for O 2 production, and photocatalytic oxidation of organic compounds and nitric oxides, and electron transfer reactions for photocatalytic reduction of viologens and metal ions are addressed, aiming at a deeper understanding of photocatalytic process.
AB - Heterogeneous photocatalysis mediated by semiconducting TiO 2 has attracted continuous interest during the past decades and has shown great potentials in environmental remediation and solar energy conversion. Basically, photocatalysis is initiated by the TiO 2 excitation. The generated charge carriers undergo trapping, recombination, and interfacial transfer before proceeding the redox reaction at TiO 2 surface. Monitoring the charge carrier dynamics is of particulate importance for understanding the underlying mechanism and designing efficient photocatalysts. This review overviews the recent progress in characterization of charge carrier dynamics. We will present the analytic techniques for monitoring the fate of charge carriers at each elementary photocatalytic step, including charge carrier generation, trapping and recombination inside the photocatalyst, as well as the interfacial charge transfer. The charge carrier dynamics at TiO 2/H 2O interface, hole transfer reactions for O 2 production, and photocatalytic oxidation of organic compounds and nitric oxides, and electron transfer reactions for photocatalytic reduction of viologens and metal ions are addressed, aiming at a deeper understanding of photocatalytic process.
KW - Charge carrier dynamics
KW - EPR spectroscopy
KW - Electron transfer
KW - Semiconductor photocatalysis
KW - TiO
KW - Transient spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85056743486&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2018.10.053
DO - 10.1016/j.cattod.2018.10.053
M3 - Article
VL - 335
SP - 78
EP - 90
JO - Catalysis today
JF - Catalysis today
SN - 0920-5861
ER -