Facet-selective charge separation in layered bismuth-based photocatalysts

2021 ◽  
Author(s):  
Cheng Hu ◽  
Na Tian ◽  
Yihe Zhang ◽  
Hongwei Huang
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Solar Energy Conversion ◽  
Spatial Charge

Facet-selective charge separation in semiconductors has been considered one of the most vital factors to improve their photocatalytic performance and selectivity for solar energy conversion due to the spatial charge...

A size tunable bimetallic nickel-zinc nitride as a multi-functional co-catalyst on nitrogen doped titania boosts solar energy conversion

2020 ◽  
Vol 49 (15) ◽  
pp. 4887-4895 ◽  
Author(s):  
Weiliang Qi ◽  
Xiangjian Meng ◽  
Samira Adimi ◽  
Haichuan Guo ◽  
Tiju Thomas ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Photocatalytic Performance ◽  
Solar Energy Conversion ◽  
Co Catalyst ◽  
Nitrogen Doped ◽  
Nickel Zinc ◽  
Zinc Nitride ◽  
Doped Titania

N–TiO2–Ni3ZnN as a multi-functional photocatalyst exhibits efficient photocatalytic performance toward various reactions.

Spatial distribution of active sites on a ferroelectric PbTiO3 photocatalyst for photocatalytic hydrogen production

2017 ◽  
Vol 198 ◽  
pp. 463-472 ◽  
Author(s):  
Rengui Li ◽  
Yue Zhao ◽  
Can Li
Keyword(s):  
Spatial Distribution ◽  
Hydrogen Production ◽  
Solar Energy ◽  
Energy Conversion ◽  
Electric Fields ◽  
Charge Separation ◽  
Active Sites ◽  
Solar Energy Conversion ◽  
Photogenerated Electrons ◽  
The Right

The separation of photogenerated charge carries is a challenging issue in artificial photocatalyst systems for solar energy conversion. It has been reported that spatial charge separation can take place between different facets of semiconductor-based crystals with regular morphology and facets, which could be used to rationally deposit cocatalysts on the right facets. However, the spatial separation of photogenerated electrons and holes is still a big challenge for a particulate photocatalyst without regular morphology and specific facets. In this work, we demonstrated that photogenerated electrons and holes can be regularly separated on ferroelectric PbTiO3 photocatalyst even without regular morphology and facets. The reduction cocatalyst and oxidation cocatalyst could be selectively formed on different sites via an in situ photochemical deposition method. It is found that the photoactivity and hydrogen production for PbTiO3 with spatially separated dual-cocatalysts is remarkably enhanced to more than 100 times greater compared to native PbTiO3, which is much higher than that the case of dual-cocatalysts with a random distribution. The intrinsic electric fields and spontaneous electric polarization in the bulk of PbTiO3 are proposed to play important roles in the spatial distribution of active sites on irregular PbTiO3 particles. Our work emphasizes the essential roles of two important factors, efficient charge separation strategy and the location of dual-cocatalysts on the right sites, to construct integrated artificial photocatalyst systems for solar energy conversion.

Double heterojunction nanowire photocatalysts for hydrogen generation

Nanoscale ◽  
2014 ◽  
Vol 6 (8) ◽  
pp. 4117-4124 ◽  
Author(s):  
P. Tongying ◽  
F. Vietmeyer ◽  
D. Aleksiuk ◽  
G. J. Ferraudi ◽  
G. Krylova ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Solar Energy ◽  
Energy Conversion ◽  
Charge Separation ◽  
Hydrogen Generation ◽  
Solar Energy Conversion ◽  
Double Heterojunction ◽  
Key Aspects

Charge separation and charge transfer across interfaces are key aspects in the design of efficient photocatalysts for solar energy conversion.

AgBr tetradecahedrons with co-exposed {100} and {111} facets: simple fabrication and enhancing spatial charge separation using facet heterojunctions

2016 ◽  
Vol 4 (47) ◽  
pp. 18570-18577 ◽  
Author(s):  
Shenyuan Bao ◽  
Zhiqiang Wang ◽  
Xueqing Gong ◽  
Cuiyun Zeng ◽  
Qiangfang Wu ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Charge Separation ◽  
Energy Conversion Efficiency ◽  
Charge Carriers ◽  
Semiconductor Materials ◽  
Separation Rate ◽  
Spatial Charge ◽  
Solar Energy Conversion Efficiency

The solar energy conversion efficiency of semiconductor materials is closely related to the separation rate of photogenerated charge carriers.

Temperature-controlled evolution of microstructures that promote charge separation in a TaON photoanode for enhanced solar energy conversion

2017 ◽  
Vol 5 (25) ◽  
pp. 12848-12855 ◽  
Author(s):  
Lang Pei ◽  
Zhe Xu ◽  
Shicheng Yan ◽  
Zhigang Zou
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Charge Separation ◽  
Heating Temperature ◽  
Solar Energy Conversion ◽  
Bulk Charge ◽  
Temperature Controlled ◽  
Water Saturated

The microstructure of TaON can be easily tuned by changing the heating temperature via a water-saturated ammonia nitriding route, thus affecting the bulk charge separation and transfer of the material.

Controllable nanothorns on TiO2mesocrystals for efficient charge separation in hydrogen evolution

2017 ◽  
Vol 53 (38) ◽  
pp. 5306-5309 ◽  
Author(s):  
Peng Zhang ◽  
Sooyeon Kim ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Hydrogen Evolution ◽  
Charge Separation ◽  
Electron Flow ◽  
Solar Energy Conversion ◽  
Efficient Charge ◽  
Induced Charge ◽  
Topotactic Transformation

Herein, we investigated that sheet-like TiO2mesocrystals with controllable nanothorns on the {101} facet during the topotactic transformation exhibit facet-induced charge separation and anisotropic electron flow, realizing the superior facet-dependent photocatalysis in solar energy conversion.

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