hybridized s,p orbitals have a large dispersion, leading to increase mobility of photogenerated electrons in the conduction band
major developing history
well-known as the Honda-Fujishima effect
first discovery and basic principles
energy band theory
different energy levels correspond with different bands
special electronic structures—mixed-configuration metal oxides
2、migrate without recombination 3、inhibit the backward reaction
example: Pt-TiO2 at 1980 with NaOH loaded on the cocatalyst
K. Maeda / Journal of Photochemistry and Photobiology C: Photochemistry Reviews 12 (2011) 237–268
major developing history
special structures—perovskites
Aurivillius phases
Dion-Jacobson phases
Ruddleson-Popper phases
major developing history
special structures—perovskites amazing effects of the network of octahedral units of metal cations
major developing history
special structures—the well-known lamellar particle
major developing history
special structures—perovskites
Cubic Perovskites
பைடு நூலகம்
Double Perovskites
Photo-catalysts for water splitting
赵宇 黄子健 王宏宇 2016年11月23日
first discovery and basic principles
First discovered at 1972
initiated by the demonstration of photo-electrochemical (PEC)
probably from its unique electronic properties
major developing history
special structures：Ruddlesden–Popper type layered perovskites of A2La2Ti3O10
a series of layered perovskites have AQYs higher than 20% under UV irradiation
pentagonal prism tunnel
built-in polarization field
[26] Y. Inoue, T. Niiyama, Y. Asai, K. Sato, J. Chem. Soc., Chem. Commun. (1992) 579.
major developing history
special electronic structures—d10-Type metal oxides MGa2 O4
the poor symmetry of octahedral and tetrahedral coordination tends to lead to the formation of isolated orbitals
[32] T.Takata,K.Shinohara,A.Tanaka,M.Hara,J.N.Kondo,K.Domen,J.Photochem. Photobiol. A: Chem. 106 (1997) 45.
major developing history
special structures—perovskites: tunnel structured BaTi4O9 and Na2Ti6O9
local internal fields due to the dipole moment inside the distorted units
major developing history
special electronic structures—d10-Type metal oxides Ga2 O3
first discovery and basic principles
test reactions for overall water splitting
first discovery and basic principles
generally to be particles
specific needs that must be met 1、the band gap restriction
full-occupied half-occupied unoccupied
band gap CB VB
first discovery and basic principles
semi-conductors are very useful in this area
K. Maeda / Journal of Photochemistry and Photobiology C: Photochemistry Reviews 12 (2011) 237–268