High-density platinum nanoparticle-decorated titanium dioxide nanofiber networks for efficient capillary photocatalytic hydrogen generation

2016 ◽  
Vol 4 (30) ◽  
pp. 11672-11679 ◽  
Author(s):  
Zhaodong Li ◽  
Chunhua Yao ◽  
Yi-Cheng Wang ◽  
Solomon Mikael ◽  
Sundaram Gunasekaran ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Reaction Kinetics ◽  
Hydrogen Generation ◽  
High Density ◽  
Platinum Nanoparticle ◽  
Photocatalytic Hydrogen Generation ◽  
Photocatalytic System

A 3D nanofibrous Pt–TiO2 capillary photocatalytic system is developed to perform photocatalytic H2 production outside of the electrolyte body. Enhanced reaction kinetics and a higher yield of H2 are obtained in the capillary setup compared to the conventional in-electrolyte setup.

Nickel(ii)-ethylenediamine tetraacetic acid sensitized silicon nanowire array: an efficient cocatalyst-free photocatalyst for photocatalytic hydrogen generation under simulated sunlight irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (81) ◽  
pp. 65660-65667
Author(s):  
Cheng Huang ◽  
Shi-Zhao Kang ◽  
Xiangqing Li ◽  
Dong Wang ◽  
Lixia Qin ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Silicon Nanowire ◽  
Nanowire Array ◽  
Tetraacetic Acid ◽  
Simulated Sunlight ◽  
Sunlight Irradiation ◽  
Ethylenediamine Tetraacetic Acid ◽  
Photocatalytic Hydrogen Generation ◽  
Photocatalytic System ◽  
Silicon Nanowire Array

The nickel(ii)-ethylenediamine tetraacetic acid sensitized silicon nanowire array was prepared. The as-prepared photocatalytic system possesses high activity for photocatalytic H2 evolution under sunlight irradiation.

Copper-Graphene-TiO2 Hybrid Materials for Photocatalytically Assisted H2 Generation

2020 ◽  
Author(s):  
David Maria Tobaldi ◽  
Kamila Koci ◽  
Miroslava Edelmannova ◽  
Luc Lajaunie ◽  
Bruno Figueiredo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Charge Carrier ◽  
Visible Light ◽  
Water Splitting ◽  
Hydrogen Generation ◽  
Fold Increase ◽  
Photocatalytic Water Splitting ◽  
Photocatalytic Hydrogen Generation ◽  
Spatial Charge ◽  
Carrier Separation

<p>Hydrogen, as energy carrier, is a zero-emission fuel. Being green and clean, it is considered to play an important role in energy and environmental issues. Photocatalytic water splitting is a process used to generate hydrogen from the dissociation of water. Titanium dioxide is still the archetype material for photocatalytic water splitting. However, because of the fast recombination of the photo-generated exciton, the yield of the reaction is typically low. In this work, we have modified the surface of titanium dioxide with copper and copper/graphene to sensitise it to visible light, and to increase the spatial charge carrier separation, thus extending the quantum yield of H<sub>2</sub> production from methanol/water mixtures. Results showed that, in the analysed system, exists an optimum amount of copper plus graphene (<i>i.e.</i> 0.5 mol% copper plus 0.5 wt% graphene) to grant a two-fold increase in the photocatalytic hydrogen generation compared to that of bare titania. That system proved itself to be complex and dynamic. This was attributed to the increased spatial charge carrier separation exploited by graphene (under 365 and 405 nm irradiation), and to the continuous reduction of Cu(II) to Cu(I) due to IFCT that has proven to be an excellent visible-light sensitiser in the copper/graphene-titania system.</p><p>Hybrid titania-copper-graphene materials could therefore be exploited in the field of light-to-energy applications.</p>

Efficient photocatalytic hydrogen generation by silica supported and platinum promoted titanium dioxide

2013 ◽  
Vol 48 (9) ◽  
pp. 3545-3552 ◽  
Author(s):  
Meenal M. Joshi ◽  
Nitin K. Labhsetwar ◽  
D.V. Parwate ◽  
Sadhana S. Rayalu
Keyword(s):  
Titanium Dioxide ◽  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Generation

scholarly journals Amorphous NiSx film as a robust cocatalyst for boosting photocatalytic hydrogen generation over ultrafine ZnCdS nanoparticles

2021 ◽  
Author(s):  
Shenglong Gan ◽  
Min Deng ◽  
Dongfang Hou ◽  
Lei Huang ◽  
XiuQing Qaio ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Charge Separation ◽  
Active Sites ◽  
Surface Reaction ◽  
Hydrogen Generation ◽  
H2 Generation ◽  
Separation Surface ◽  
Photocatalytic Hydrogen Generation ◽  
Photocatalytic H2 Generation ◽  
Surface Reaction Kinetics

Optimization of cocatalyst is promising and of great significance in enhancing photocatalytic H2 generation from the perspective of understanding the charge separation, surface reaction kinetics, and distribution of active sites....

Copper-Graphene-TiO2 Hybrid Materials for Photocatalytically Assisted H2 Generation

2020 ◽  
Author(s):  
David Maria Tobaldi ◽  
Kamila Koci ◽  
Miroslava Edelmannova ◽  
Luc Lajaunie ◽  
Bruno Figueiredo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Charge Carrier ◽  
Visible Light ◽  
Water Splitting ◽  
Hydrogen Generation ◽  
Fold Increase ◽  
Photocatalytic Water Splitting ◽  
Photocatalytic Hydrogen Generation ◽  
Spatial Charge ◽  
Carrier Separation

<p>Hydrogen, as energy carrier, is a zero-emission fuel. Being green and clean, it is considered to play an important role in energy and environmental issues. Photocatalytic water splitting is a process used to generate hydrogen from the dissociation of water. Titanium dioxide is still the archetype material for photocatalytic water splitting. However, because of the fast recombination of the photo-generated exciton, the yield of the reaction is typically low. In this work, we have modified the surface of titanium dioxide with copper and copper/graphene to sensitise it to visible light, and to increase the spatial charge carrier separation, thus extending the quantum yield of H<sub>2</sub> production from methanol/water mixtures. Results showed that, in the analysed system, exists an optimum amount of copper plus graphene (<i>i.e.</i> 0.5 mol% copper plus 0.5 wt% graphene) to grant a two-fold increase in the photocatalytic hydrogen generation compared to that of bare titania. That system proved itself to be complex and dynamic. This was attributed to the increased spatial charge carrier separation exploited by graphene (under 365 and 405 nm irradiation), and to the continuous reduction of Cu(II) to Cu(I) due to IFCT that has proven to be an excellent visible-light sensitiser in the copper/graphene-titania system.</p><p>Hybrid titania-copper-graphene materials could therefore be exploited in the field of light-to-energy applications.</p>

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