Citation: Dong Beibei, Liu Taifeng, Li Can, Zhang Fuxiang. Species, engineering and characterizations of defects in TiO₂-based photocatalyst[J]. Chinese Chemical Letters, ;2018, 29(5): 671-680. doi: 10.1016/j.cclet.2017.12.002 shu

Species, engineering and characterizations of defects in TiO₂-based photocatalyst

Dong Beibei ^a,b ,
Liu Taifeng ^c ,
Li Can ^a ,
Zhang Fuxiang ^a,,

a.
State Key Laboratory of Catalysis, 2011-iChEM, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Dalian 116023, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China
c.
National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Collaborative Innovation Center of Nano Functional Materials and Applications of Henan Province, Henan University, Kaifeng 475004, China

Author Bio:

Prof. Fuxiang Zhang earned his bachelor's degree (1999), Ph.D. (2004) and then worked as the faculty at Nankai University. In September 2007, he began to pursue his first postdoctoral research at the University of Pierre & Marrie Curie, in France. From July 2008 to September 2011, he worked as Postdoc at the University of Tokyo. From Oct. 2011 to now, he has been working at Dalian Institute of Chemical Physics (DICP) to develop novel photocatalytic materials with wide visible light utilization as well as its fabrication of efficient Z-scheme overall water splitting systems for hydrogen production. To date, he has published over 70 SCI papers in some peerreviewed journals such as Nat. Commun., J. Am. Chem. Soc., Angew. Chem. Int. Ed., Chem. Sci. and ACS Catal. etc. with total cited times of over 4000
Corresponding author: Zhang Fuxiang, fxzhang@dicp.ac.cn
Received Date: 18 October 2017
Revised Date: 10 November 2017
Accepted Date: 18 October 2017
Available Online: 7 May 2017

Figures(15)

Light absorption, charge separation and surface reaction are considered as the main processes of photocatalysis on one semiconductor, and all of them are demonstrated to be related to the defect states of photocatalysts. This paper will choose TiO₂ as model photocatalyst to introduce some basic concepts and strategies related to defects and methods developed to characterize defects in the past decades. Meanwhile, such strategies as hydrogenation and metal/nonmetal doping into TiO₂ will be introduced to extend utilization of solar spectrum and/or to provide active sites. On the contrary, the unfavorable effect of defects such as acting as recombination centers of photogenerated carriers will also be introduced. Some typical methods to characterize the properties of defects are summarized, which contain electron paramagnetic resonance (EPR), photoluminescence technique (PL), positron annihilation spectroscopy (PAS), and so on. We do hope that this review will make a revealing effect on understanding to the functions of defects as well as construction of efficient photocatalytic systems in the future.
- Titanium dioxide,
- Defect engineering,
- Photocatalysis,
- Water splitting,
- Environmental purification
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沈阳化工大学材料科学与工程学院沈阳 110142

Species, engineering and characterizations of defects in TiO2-based photocatalyst

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Species, engineering and characterizations of defects in TiO₂-based photocatalyst