Retracted article: Synthesis of Pt@TiO2@MnOx hollow spheres with high spatial charge separation efficiency for photocatalytic overall water splitting

2013 ◽  
Author(s):  
Lichen Liu ◽  
Weixin Zou ◽  
Xianrui Gu ◽  
Chengyan Ge ◽  
Yu Deng ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Hollow Spheres ◽  
Overall Water Splitting ◽  
Spatial Charge ◽  
Retracted Article ◽  
Charge Separation Efficiency

Enhancing charge separation on high symmetry SrTiO3exposed with anisotropic facets for photocatalytic water splitting

2016 ◽  
Vol 9 (7) ◽  
pp. 2463-2469 ◽  
Author(s):  
Linchao Mu ◽  
Yue Zhao ◽  
Ailong Li ◽  
Shengyang Wang ◽  
Zhiliang Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
High Symmetry ◽  
Photocatalytic Water Splitting ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Spatial Charge

Spatial charge separation achieved on the anisotropic facets of high symmetry SrTiO3nanocrystals for highly efficient photocatalytic overall water splitting.

Surface‐Polarity‐Induced Spatial Charge Separation Boosts Photocatalytic Overall Water Splitting on GaN Nanorod Arrays

2019 ◽  
Vol 132 (2) ◽  
pp. 945-952 ◽  
Author(s):  
Zheng Li ◽  
Liang Zhang ◽  
Yong Liu ◽  
Chenyi Shao ◽  
Yuying Gao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Nanorod Arrays ◽  
Surface Polarity ◽  
Overall Water Splitting ◽  
Spatial Charge

Ferroelectric enhanced Z-scheme P-doped g-C3N4/PANI/BaTiO3 ternary heterojunction with boosted visible-light photocatalytic water splitting

2019 ◽  
Vol 43 (17) ◽  
pp. 6753-6764 ◽  
Author(s):  
Qiannan Li ◽  
Yuguo Xia ◽  
Kangliang Wei ◽  
Xiaotong Ding ◽  
Shun Dong ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Photocatalytic Water Splitting ◽  
Surface Polarization ◽  
Production Activity ◽  
Charge Separation Efficiency ◽  
Visible Light Photocatalytic

Surface polarization promotes the charge separation efficiency of PCN/PANI/BTO ternary heterojunction, resulting in an enhanced visible-light photocatalytic hydrogen production activity.

Charge Carrier Transfer in Ta3N5 Photoanodes Prepared by Different Methods for Solar Water Splitting

2016 ◽  
Vol 69 (6) ◽  
pp. 631 ◽  
Author(s):  
Mingxue Li ◽  
Wenjun Luo ◽  
Liheng Yang ◽  
Xin Zhao ◽  
Zhigang Zou
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Water Splitting ◽  
Charge Separation ◽  
Preparation Method ◽  
Separation Efficiency ◽  
Interfacial Charge Transfer ◽  
Splitting Property ◽  
Charge Separation Efficiency ◽  
Interfacial Charge

The preparation method of a photoanode can affect its water splitting property. Here, as examples, we prepared Ta3N5 photoanodes by an electrophoresis deposition (EPD) method and an oxidation and nitridation of Ta foil (ONTF) method. The light harvest, interfacial charge transfer, and charge separation of the two Ta3N5 photoanodes were analysed to gain insight into the role of the preparation method on the water splitting property. The results suggested that the ONTF-prepared Ta3N5 showed a higher solar energy conversion efficiency, arising from its better interfacial charge transfer efficiency and higher charge separation efficiency. The higher charge separation efficiency was mainly attributed to good electron transfer, and the inter-particle connectivity was key for the electron transfer in the photoanodes. Especially, the dense, small particle structure of ONTF-prepared Ta3N5 was beneficial for increasing the connectivity between inter-particles. This comparison of preparation methods can be used as a reference for future photoanode preparation to improve the water splitting property of photoelectrochemical cells.

Spatial engineering of a Co(OH)x encapsulated p-Cu2S/n-BiVO4 photoanode: simultaneously promoting charge separation and surface reaction kinetics in solar water splitting

2019 ◽  
Vol 7 (12) ◽  
pp. 6747-6752 ◽  
Author(s):  
Bing He ◽  
Yang Wang ◽  
Xueqin Liu ◽  
Yinchang Li ◽  
Xiaoqin Hu ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Water Splitting ◽  
Charge Separation ◽  
Surface Reaction ◽  
Separation Efficiency ◽  
Photocurrent Density ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Separation Efficiency ◽  
Surface Reaction Kinetics

An ultrathin Co(OH)x coated p-Cu2S/n-BiVO4 heterojunction photoanode with improved charge separation efficiency was prepared, showing a photocurrent density of 3.51 mA cm−2.

Surface Engineering of Metal Oxide Photoelectrodes for Improved Band Alignment in Solar Water Splitting Cells

2016 ◽  
Vol 879 ◽  
pp. 832-837 ◽  
Author(s):  
Soong Leong Sim ◽  
Ye Ru Liu ◽  
Ying Woan Soon ◽  
James Robert Jennings
Keyword(s):  
Metal Oxide ◽  
Water Splitting ◽  
Charge Separation ◽  
Diffusion Length ◽  
Separation Efficiency ◽  
Electron Diffusion ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Separation Efficiency ◽  
Electron Diffusion Length

Several earth-abundant transition-metal oxides (e.g. Fe2O3, CoO, and Cu2O) possessing suitable band gaps for solar water splitting exist, but energy level alignment is often sub-optimal, i.e. the conduction and valence bands do not straddle the water oxidation and reduction potentials. Here, using a nanocrystalline-TiO2-based photoelectrochemical cell as a model system, we investigate the effect of tuning the semiconductor energy levels by adding Li+ ions to the electrolyte. The effect of LiClO4 addition on band edges, interfacial recombination resistance, electron diffusion length, and charge-separation efficiency were quantified by impedance spectroscopy and analysis of incident photon-to-current efficiency spectra. We find that the TiO2 band edges are shifted toward positive potentials by the addition of Li+, and that this increases the apparent electron diffusion length without affecting the charge-separation efficiency, most likely due to a change in the driving force for O2 reduction. These results should prove useful in the modeling and optimization of solar water splitting cells employing metal oxide photoelectrodes.

Improved charge separation via Fe-doping of copper tungstate photoanodes

2015 ◽  
Vol 17 (15) ◽  
pp. 9857-9866 ◽  
Author(s):  
Divya Bohra ◽  
Wilson A. Smith
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Fe Doping ◽  
Solar Water ◽  
Solar Water Splitting ◽  
New Methods ◽  
Copper Tungstate ◽  
Charge Separation Efficiency ◽  
Conversion Efficiencies

By doping CuWO4 photoanodes with Fe, the charge separation efficiency and incident photon-to-current conversion efficiencies have increased dramatically, leading to improvements in the fundamentally limiting processes in this material. These results offer new methods and insights into improved solar water splitting photoelectrodes.

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