Photocatalytic hydrogen generation from water–methanol mixtures using “black” anatase obtained by annealing of titanate nanotubes

2015 ◽  
Vol 4 ◽  
pp. 63-68
Author(s):  
Marco Serra ◽  
Anish Khan ◽  
Abdullah M. Asihi ◽  
Samia A. Kosa ◽  
Hermenegildo Garcia
Keyword(s):  
Hydrogen Generation ◽  
Titanate Nanotubes ◽  
Photocatalytic Hydrogen Generation

scholarly journals Synergy of the Combination of Titanate Nanotubes with Titania Nanoparticles for the Photocatalytic Hydrogen Generation from Water-Methanol Mixture Using Simulated Sunlight

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Marco Serra ◽  
Hermenegildo Garcia
Keyword(s):  
Hydrogen Generation ◽  
Titanium Dioxide Nanoparticles ◽  
Titanate Nanotubes ◽  
Titania Nanoparticles ◽  
Simulated Sunlight ◽  
Visible Absorption ◽  
Sunlight Irradiation ◽  
Photocatalytic Hydrogen Generation ◽  
Commercial Titanium ◽  
Alkali Digestion

Alkali digestion of titanium nanoparticles leads, after neutralization, to the formation of titanate nanotubes with long aspect ratio. One salient change in the formation of titanate nanotubes is the observation of an extended visible absorption band up to 550 nm, responsible for their brown colour. Combination of titanate nanotubes with commercial titanium dioxide nanoparticles, either Evonik P25 or Millennium PC500, results in an enhanced photocatalytic activity for hydrogen generation from water-methanol mixtures. This synergy between the two titanium semiconductors has an optimum for a certain proportion of the two components and is observed in both the absence and the presence of platinum or gold nanoparticles. The best efficiency under simulated sunlight irradiation was for a combination of 12 wt.% titanate nanotubes containing 0.32 wt.% platinum in 88 wt.% Millennium PC500, where a two-time increase in the hydrogen generation is observed versus the activity of Millennium PC500 containing platinum. This synergy is proposed to derive from the interfacial electron transfer from titanate nanotubes undergoing photoexcitation at wavelengths in which Millennium PC500 does not absorb this form of titania nanoparticles. Our results illustrate how the combination of several titanium semiconductors can result in an enhancement efficiency with respect to their individual components.

Photocatalytic hydrogen generation using mesoporous silicon nanoparticles: influence of magnesiothermic reduction conditions and nanoparticle aging on the catalytic activity

Nanoscale ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 2685-2692
Author(s):  
Isabel S. Curtis ◽  
Ryan J. Wills ◽  
Mita Dasog
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Silicon Nanoparticles ◽  
Hydrogen Generation ◽  
Oxide Content ◽  
Magnesiothermic Reduction ◽  
Mesoporous Silicon ◽  
High Crystallinity ◽  
Photocatalytic Hydrogen Generation

High crystallinity, low oxide content, and low sintering lead to optimally performing mesoporous Si photocatalysts for solar-driven hydrogen production.

Synthesis of disorder–order TaON homojunction for photocatalytic hydrogen generation under visible light

2021 ◽  
Vol 56 (16) ◽  
pp. 9791-9806
Author(s):  
Jinsheng Yan ◽  
Lanqing Hu ◽  
Lingkai Cui ◽  
Qianqian Shen ◽  
Xuguang Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Generation

scholarly journals Zn0.8Cd0.2S Hollow Spheres with a Highly Dispersed Ni Dopant for Boosting Photocatalytic Hydrogen Generation

ACS Omega ◽  
2021 ◽  
Author(s):  
Ying Luo ◽  
Xiaohui Zhang ◽  
Cheng Huang ◽  
Xiaole Han ◽  
Qingqing Jiang ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Hollow Spheres ◽  
Photocatalytic Hydrogen Generation ◽  
Highly Dispersed ◽  
Ni Dopant

Hierarchically Grown Urchinlike CdS@ZnO and CdS@Al2O3Heteroarrays for Efficient Visible-Light-Driven Photocatalytic Hydrogen Generation

2011 ◽  
Vol 116 (1) ◽  
pp. 150-156 ◽  
Author(s):  
Dipankar Barpuzary ◽  
Ziyauddin Khan ◽  
Natarajan Vinothkumar ◽  
Mahuya De ◽  
Mohammad Qureshi
Keyword(s):  
Visible Light ◽  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Generation ◽  
Visible Light Driven
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