Details
| Original language | English |
|---|---|
| Pages (from-to) | 2687-2693 |
| Number of pages | 7 |
| Journal | Environmental Technology (United Kingdom) |
| Volume | 37 |
| Issue number | 21 |
| Publication status | Published - 1 Nov 2016 |
Abstract
Highly crystalline anatase TiO 2 nanoparticles with high BET surface area have been synthesized by thermal hydrolysis of titanium(IV) bis(ammoniumlactato) dihydroxide aqueous solutions. The photocatalytic H 2 production from aqueous citric acid (CA) solutions over Pt-loaded TiO 2 has been investigated under different experimental conditions, that is, different CA concentration, temperature, light intensity, and pH of Pt/TiO 2 suspension. For comparison, the photocatalytic dehydrogenation of triethanolamine (TEA) has also been investigated. The highest H 2 production rates were obtained at pH 3 and 9 for CA and TEA, respectively. This behavior is readily explained by the adsorption characteristic of the employed reagent on the surface of the charged TiO 2. The effect of the photocatalyst loading and the light intensity on the H 2 production rate showed the same behavior in the case of CA and TEA evincing that these parameters are catalyst dependent. The apparent activation energies have been determined to be 13.5 ± 1.8 and 14.7 ± 1.6 kJ mol −1 for CA and TEA, respectively, indicating the existence of an activation energy barrier in a photocatalytic process which can be attributed to the desorption of adsorbed products.
Keywords
- Photocatalytic hydrogen production, biomass derivatives, citric acid, titanium dioxide, triethanolamine
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Chemistry
- Environmental Science(all)
- Water Science and Technology
- Environmental Science(all)
- Waste Management and Disposal
Sustainable Development Goals
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In: Environmental Technology (United Kingdom), Vol. 37, No. 21, 01.11.2016, p. 2687-2693.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Photocatalytic hydrogen production from biomass-derived compounds: a case study of citric acid
AU - Alkaim, A.F.
AU - Kandiel, T.A.
AU - Dillert, R.
AU - Bahnemann, D.W.
N1 - Publisher Copyright: © 2016 Informa UK Limited, trading as Taylor & Francis Group. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - Highly crystalline anatase TiO 2 nanoparticles with high BET surface area have been synthesized by thermal hydrolysis of titanium(IV) bis(ammoniumlactato) dihydroxide aqueous solutions. The photocatalytic H 2 production from aqueous citric acid (CA) solutions over Pt-loaded TiO 2 has been investigated under different experimental conditions, that is, different CA concentration, temperature, light intensity, and pH of Pt/TiO 2 suspension. For comparison, the photocatalytic dehydrogenation of triethanolamine (TEA) has also been investigated. The highest H 2 production rates were obtained at pH 3 and 9 for CA and TEA, respectively. This behavior is readily explained by the adsorption characteristic of the employed reagent on the surface of the charged TiO 2. The effect of the photocatalyst loading and the light intensity on the H 2 production rate showed the same behavior in the case of CA and TEA evincing that these parameters are catalyst dependent. The apparent activation energies have been determined to be 13.5 ± 1.8 and 14.7 ± 1.6 kJ mol −1 for CA and TEA, respectively, indicating the existence of an activation energy barrier in a photocatalytic process which can be attributed to the desorption of adsorbed products.
AB - Highly crystalline anatase TiO 2 nanoparticles with high BET surface area have been synthesized by thermal hydrolysis of titanium(IV) bis(ammoniumlactato) dihydroxide aqueous solutions. The photocatalytic H 2 production from aqueous citric acid (CA) solutions over Pt-loaded TiO 2 has been investigated under different experimental conditions, that is, different CA concentration, temperature, light intensity, and pH of Pt/TiO 2 suspension. For comparison, the photocatalytic dehydrogenation of triethanolamine (TEA) has also been investigated. The highest H 2 production rates were obtained at pH 3 and 9 for CA and TEA, respectively. This behavior is readily explained by the adsorption characteristic of the employed reagent on the surface of the charged TiO 2. The effect of the photocatalyst loading and the light intensity on the H 2 production rate showed the same behavior in the case of CA and TEA evincing that these parameters are catalyst dependent. The apparent activation energies have been determined to be 13.5 ± 1.8 and 14.7 ± 1.6 kJ mol −1 for CA and TEA, respectively, indicating the existence of an activation energy barrier in a photocatalytic process which can be attributed to the desorption of adsorbed products.
KW - Photocatalytic hydrogen production
KW - biomass derivatives
KW - citric acid
KW - titanium dioxide
KW - triethanolamine
UR - http://www.scopus.com/inward/record.url?scp=84961393750&partnerID=8YFLogxK
U2 - 10.1080/09593330.2016.1158871
DO - 10.1080/09593330.2016.1158871
M3 - Article
VL - 37
SP - 2687
EP - 2693
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
SN - 0959-3330
IS - 21
ER -