Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 187 |
| Fachzeitschrift | Journal of nanoparticle research |
| Jahrgang | 18 |
| Ausgabenummer | 7 |
| Publikationsstatus | Veröffentlicht - 5 Juli 2016 |
Abstract
Abstract: The simultaneous bimodal study of the photocatalytic oxalic acid degradation by aqueous TiO 2 suspensions revealed that particular systems possess the capacity to protect a certain amount of oxalic acid from oxidation, thus hindering, to some extent, the photocatalytic reaction. While measurements of the oxalic acid concentration in the bulk liquid phase indicated full photocatalytic degradation; in situ pH-stat measurements allowed the quantification of the amount of oxalic acid remaining in the part of the nanoparticulate agglomerates where light could apparently not access. An explanation for this phenomenon takes into account the possibility of the formation of TiO 2 agglomerates in which these molecules are hidden from the effect of the light, thus being protected from photocatalytic degradation. Studies of different TiO 2 materials with different particle sizes allowed a deeper exploration of this phenomenon. In addition, because this property of encapsulating pollutant molecules by photocatalytic systems is found to be a reversible phenomenon, P25 appears to be more convenient and advantageous as compared to the use of large surface area photocatalysts. Graphical Abstract: Fig.: Deaggregation of TiO 2 particle agglomerates upon UV illumination. [Figure not available: see fulltext.]
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Chemische Verfahrenstechnik (insg.)
- Bioengineering
- Chemie (insg.)
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
- Werkstoffwissenschaften (insg.)
- Mathematik (insg.)
- Modellierung und Simulation
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in: Journal of nanoparticle research, Jahrgang 18, Nr. 7, 187, 05.07.2016.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - The role of nanoparticulate agglomerates in TiO2 photocatalysis
T2 - degradation of oxalic acid
AU - Ivanova, I.
AU - Mendive, C.B.
AU - Bahnemann, D.
N1 - Publisher Copyright: © 2016, Springer Science+Business Media Dordrecht. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/7/5
Y1 - 2016/7/5
N2 - Abstract: The simultaneous bimodal study of the photocatalytic oxalic acid degradation by aqueous TiO 2 suspensions revealed that particular systems possess the capacity to protect a certain amount of oxalic acid from oxidation, thus hindering, to some extent, the photocatalytic reaction. While measurements of the oxalic acid concentration in the bulk liquid phase indicated full photocatalytic degradation; in situ pH-stat measurements allowed the quantification of the amount of oxalic acid remaining in the part of the nanoparticulate agglomerates where light could apparently not access. An explanation for this phenomenon takes into account the possibility of the formation of TiO 2 agglomerates in which these molecules are hidden from the effect of the light, thus being protected from photocatalytic degradation. Studies of different TiO 2 materials with different particle sizes allowed a deeper exploration of this phenomenon. In addition, because this property of encapsulating pollutant molecules by photocatalytic systems is found to be a reversible phenomenon, P25 appears to be more convenient and advantageous as compared to the use of large surface area photocatalysts. Graphical Abstract: Fig.: Deaggregation of TiO 2 particle agglomerates upon UV illumination. [Figure not available: see fulltext.]
AB - Abstract: The simultaneous bimodal study of the photocatalytic oxalic acid degradation by aqueous TiO 2 suspensions revealed that particular systems possess the capacity to protect a certain amount of oxalic acid from oxidation, thus hindering, to some extent, the photocatalytic reaction. While measurements of the oxalic acid concentration in the bulk liquid phase indicated full photocatalytic degradation; in situ pH-stat measurements allowed the quantification of the amount of oxalic acid remaining in the part of the nanoparticulate agglomerates where light could apparently not access. An explanation for this phenomenon takes into account the possibility of the formation of TiO 2 agglomerates in which these molecules are hidden from the effect of the light, thus being protected from photocatalytic degradation. Studies of different TiO 2 materials with different particle sizes allowed a deeper exploration of this phenomenon. In addition, because this property of encapsulating pollutant molecules by photocatalytic systems is found to be a reversible phenomenon, P25 appears to be more convenient and advantageous as compared to the use of large surface area photocatalysts. Graphical Abstract: Fig.: Deaggregation of TiO 2 particle agglomerates upon UV illumination. [Figure not available: see fulltext.]
KW - Deaggregation
KW - Oxalic acid
KW - Photocatalysis
KW - Semiconductor nanoparticles
KW - TiO
KW - TiO2
UR - http://www.scopus.com/inward/record.url?scp=84978066673&partnerID=8YFLogxK
U2 - 10.1007/s11051-016-3495-x
DO - 10.1007/s11051-016-3495-x
M3 - Article
VL - 18
JO - Journal of nanoparticle research
JF - Journal of nanoparticle research
SN - 1388-0764
IS - 7
M1 - 187
ER -