fulltext.study @t Gmail

How and to what extent do carbon materials catalyze solar hydrogen production from water?

Paper ID Volume ID Publish Year Pages File Format Full-Text
46107 46429 2012 8 PDF Available
Title
How and to what extent do carbon materials catalyze solar hydrogen production from water?
Abstract

The aim of this study is to find key physicochemical properties of carbon materials in catalyzing the photocatalytic H2 production from visible light-irradiated aqueous suspensions of carbon/CdSe composites. For this, we have employed five different carbon materials (activated carbons, carbon fibers, multi- and single-walled nanotubes, and graphites) without and with acid treatment, and two carbon materials obtained from graphite (graphite oxides and reduced graphene oxides). Detailed surface analyses for the bare carbon materials and carbon/CdSe composites were completed to characterize their physicochemical properties. Most virgin (non-treated) carbon materials are beneficial in catalyzing the photocatalytic H2 production of carbon/CdSe composites, and such catalytic effects are significantly enhanced by their acid treatment by a factor of 3–7. Systematic investigation indicates that the surface area, the degree of disordered carbon (i.e., ID/IG ratios), and the electrical conductivity (σ) of carbon materials display the correlations with H2 production of carbon/CdSe composites. However, the first two factors could not explain well the enhanced H2 production by acid treatment of carbon materials, whereas the last factor exhibits the linearity with the H2 amounts even for the acid-treated carbon materials. High electrical conductivity appears to facilitate the photogenerated electron transfer from CdSe to neighboring carbon materials, leading to inhibition of charge pair recombination as evidenced by photoluminescence study.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► CdSe particles were loaded on seven different kinds of carbon materials. ► The catalytic effects of carbon materials are enhanced by acid treatment by a factor of 3–7. ► The degrees of disordered carbon negatively influences the photocatalytic H2 generation. ► The H2 amounts have a correlation with the logarithmic electrical conductivities of carbon materials.

Keywords
Photocatalyst; CdSe; Artificial photosynthesis; Water splitting; Heterojunction
First Page Preview
How and to what extent do carbon materials catalyze solar hydrogen production from water?
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 125, 21 August 2012, Pages 530–537
Authors
, ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us