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.

Efficient charge separation on 3D architectures of TiO2 mesocrystals packed with a chemically exfoliated MoS2 shell in synergetic hydrogen evolution

2015 ◽  
Vol 51 (33) ◽  
pp. 7187-7190 ◽  
Author(s):  
Peng Zhang ◽  
Takashi Tachikawa ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima
Keyword(s):  
Hydrogen Evolution ◽  
Charge Separation ◽  
Electron Flow ◽  
Efficient Charge

With anisotropic electron flow and charge separation, TiO2 mesocrystals packed with a chemically exfoliated MoS2 shell exhibit efficient hydrogen evolution compared to nanocrystals.

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.

Hydrogen evolution based on the electrons/protons stored on amorphous TiO2

2017 ◽  
Vol 19 (43) ◽  
pp. 29053-29056 ◽  
Author(s):  
Shuwen Zeng ◽  
Ling Zhang ◽  
Wenzhong Wang ◽  
Dengkui Shao ◽  
Hongchang Hao
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Solar Energy Conversion ◽  
Amorphous Tio2

The hydrogen evolution reaction (HER) using recyclable mediator is being actively pursued as a route 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.

Metal–semiconductor ternary hybrids for efficient visible-light photocatalytic hydrogen evolution

2018 ◽  
Vol 6 (27) ◽  
pp. 13225-13235 ◽  
Author(s):  
Dae Han Wi ◽  
Se Young Park ◽  
Seunghoon Lee ◽  
Jiha Sung ◽  
Jong Wook Hong ◽  
...  
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Energy Conversion ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Solar Energy Conversion ◽  
Photocatalytic Hydrogen Evolution ◽  
Metal Nanocrystals ◽  
Visible Light Photocatalytic

A high-performance solar energy conversion platform was constructed by the intimate coupling of two different complementary semiconductors and morphology-controlled plasmonic metal nanocrystals in a controlled manner.

Sign in / Sign up

Export Citation Format

Share Document