Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (1): 28-47.doi: 10.3866/PKU.WHXB201512081

• REVIEW • Previous Articles     Next Articles

Fundamental Processes in Surface Photocatalysis on TiO2

Qing GUO1,Chuan-Yao ZHOU1,Zhi-Bo MA1,Ze-Feng REN2,Hong-Jun FAN1,Xue-Ming YANG1,*()   

  1. 1 State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P.R.China
    2 International Center for Quantum Materials and School of Physics, Peking University, Beijing 100871, P.R.China
  • Received:2015-11-06 Published:2016-01-13
  • Contact: Xue-Ming YANG E-mail:xmyang@dicp.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(21203189, 21321091, 21173212, 21403224, 21573225, 21322310);National Key Basic Research Program of China (973)(2013CB834605);Key Research Program of the Chinese Academy of Sciences(KGZD-EW-T05);the State Key Laboratory of Molecular Reaction Dynamics, China(ZZ-2014-02)

Abstract:

Because of the potential applications of TiO2 in photocatalytic hydrogen production and pollutant degradation, over the past few decades we have witnessed increasing interest in and effort toward developing TiO2-based photocatalysts, and improving the efficiency and exploring the reaction mechanisms at the atomic and molecular levels. Because surface science studies on single crystal surfaces under ultrahigh vacuum (UHV) conditions can provide fundamental insights into these important processes, both the thermo-and photo-chemistry on TiO2, especially on rutile TiO2(110) surfaces, have been extensively investigated with a variety of experimental and theoretical approaches. In this review, commencing with the properties of TiO2, we then focus on charge transport and trapping, and electron transfer dynamics. Next, we summarize recent progress made in the study of elementary photocatalytic chemistry of methanol on mainly rutile TiO2(110), as well as in some studies on rutile TiO2(011) and anataseTiO2(101). These studies have provided fundamental insights into surface photocatalysis and stimulated new investigations in this exciting area. The implications of these studies for the development of new photocatalysis models are also discussed.

Key words: Titanium dioxide, Photocatalysis, Electron-hole separation, Nonadiabatic process, Ground-state potential energy surface

MSC2000: 

  • O643