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Interfacial Charge Transport in 1D TiO 2 Based Photoelectrodes for Photoelectrochemical Water Splitting
Author(s) -
Yu Zhongrui,
Liu Haobo,
Zhu Mingyuan,
Li Ying,
Li Wenxian
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201903378
Subject(s) - water splitting , materials science , heterojunction , titanium dioxide , nanotechnology , band gap , doping , solar energy , semiconductor , optoelectronics , energy transformation , photoelectrochemical cell , photoelectrochemistry , triboelectric effect , energy conversion efficiency , photocatalysis , electrode , electrochemistry , catalysis , chemistry , electrical engineering , biochemistry , physics , electrolyte , metallurgy , thermodynamics , engineering , composite material
1D nanostructured photoelectrodes are promising for application as photoelectrochemical (PEC) devices for solar energy conversion into hydrogen (H 2 ) owing to the optical, structural, and electronic advantages. Titanium dioxide (TiO 2 ) is the most investigated candidate as a photoelectrode due to its good photostability, low production cost, and eco‐friendliness. The obstacle for TiO 2 's practical application is the inherent wide bandgap (UV‐lights response), poor conductivity, and limited hole diffusion length. Here, a comprehensive review of the current research efforts toward the development of 1D TiO 2 based photoelectrodes for heterogeneous PEC water splitting is provided along with a discussion of nanoarchitectures and energy band engineering influences on interfacial charge transfer and separation of 1D TiO 2 composited with different dimensional photoactive materials. The key focus of this review is to understand the charge transfer processes at interfaces and the relationship between photogenerated charge separation and photoelectrochemical performance. It is anticipated that this review will afford enriched information on the rational designs of nanoarchitectures, doping, and heterojunction interfaces for 1D TiO 2 based photoelectrodes to achieve highly efficient solar energy conversion.