Effect of polar and movable (OH or NH2 groups) on the photocatalytic H2 production of alkyl-alkanolamine: a comparative study

Environmental Technology
A F AlkaimDetlef W Bahnemann

Abstract

The photocatalytic production of molecular hydrogen (H2) from aqueous solutions of alkyl-alkanolamines (triethanolamine (tri-EOA), diethanolamine (di-EOA), ethanolamine (EOA), ethylamine (EA) and ethanol over Pt-loaded commercial (Sachtleben Hombikat UV100) nanoparticle titanium dioxide photocatalysts was studied. These photocatalysts were characterized using X-ray diffraction, Brunauer-Emmett-Teller, field-emission scanning electron microscopy, atomic force microscopy and UV-vis diffuse reflectance spectroscopy techniques. Effect of pH and temperature on photocatalytic hydrogen production of alkyl-alkanolamines was investigated. It was found for all molecules under study that the amount of hydrogen produced at a constant illumination time is a function of pH and temperature. At all temperatures investigated the rate of hydrogen production at pH 9 followed the order tri-EOAethanolamine > di-EOA ≈ EOA > ethanol > EA. From the values of the photocatalytic rate constants at various temperatures, the apparent activation energies were determined for the hydrogen production. The observed dependence of the reaction rate on solution temperature cannot be related to light-driven reaction steps, because the band-gap energy of the semicon...Continue Reading

References

Nov 18, 2008·Journal of Hazardous Materials·Chung-Shin LuHua-Kuang Li
Apr 4, 2009·Journal of Hazardous Materials·Jun Bo ZhongYao Qiang Chen
Jan 11, 2011·Water Research·Zhigang XiongX S Zhao
Mar 27, 2012·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Saeid KhodadoustNezam Armand
Sep 5, 2012·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Tarek A KandielDetlef Bahnemann
Dec 19, 2012·Physical Chemistry Chemical Physics : PCCP·Wenguang WangJiaguo Yu
Mar 8, 2014·Environmental Technology·M A BarakatJ N Kuhn

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Citations

Mar 2, 2016·Environmental Technology·Ayad F AlkaimDetlef W Bahnemann
Mar 14, 2017·Environmental Technology·Hadi AhmariMohammad Hassanzadeh Khayyat
Nov 3, 2016·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Firas H AbdulrazzakDetlef W Bahnemann

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Methods Mentioned

BETA
X-ray
scanning
atomic force microscopy
AFM

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