Details
| Original language | English |
|---|---|
| Pages (from-to) | 1047-1056 |
| Number of pages | 10 |
| Journal | Journal of materials science |
| Volume | 52 |
| Issue number | 2 |
| Publication status | Published - 1 Jan 2017 |
Abstract
Stirred media milling is an effective method to form stable highly concentrated nanoparticle suspensions. In this work, the effect of high-energy stirred media milling on aqueous Hombikat UV100 TiO 2 (Huntsman) with milling times of 0.5–96 h, containing highly concentrated suspensions with 17 wt%, was investigated. The suspensions were stabilized with nitric acid and compared with its commercial as prepared analogue Hombikat XXS100 (Huntsman). Stable and photoactive suspensions could be formed via ball milling without a loss of photoactivity between milling times of 0.5 and 2 h. To characterize the suspensions, they were freeze-dried obtaining the pure powder. It was found that the BET surface areas, the assembled structure of aggregates and agglomerates as well as particle and mesopore size distribution were decreased with increasing milling time as do the photonic efficiencies. The experimental results support the antenna mechanism theory and show that the effect of aggregates and agglomerates is highly underestimated in photocatalytic systems.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Journal of materials science, Vol. 52, No. 2, 01.01.2017, p. 1047-1056.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of TiO2 agglomerate and aggregate sizes on photocatalytic activity
AU - Melcher, J.
AU - Barth, N.
AU - Schilde, C.
AU - Kwade, A.
AU - Bahnemann, D.
N1 - Publisher Copyright: © 2016, Springer Science+Business Media New York. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Stirred media milling is an effective method to form stable highly concentrated nanoparticle suspensions. In this work, the effect of high-energy stirred media milling on aqueous Hombikat UV100 TiO 2 (Huntsman) with milling times of 0.5–96 h, containing highly concentrated suspensions with 17 wt%, was investigated. The suspensions were stabilized with nitric acid and compared with its commercial as prepared analogue Hombikat XXS100 (Huntsman). Stable and photoactive suspensions could be formed via ball milling without a loss of photoactivity between milling times of 0.5 and 2 h. To characterize the suspensions, they were freeze-dried obtaining the pure powder. It was found that the BET surface areas, the assembled structure of aggregates and agglomerates as well as particle and mesopore size distribution were decreased with increasing milling time as do the photonic efficiencies. The experimental results support the antenna mechanism theory and show that the effect of aggregates and agglomerates is highly underestimated in photocatalytic systems.
AB - Stirred media milling is an effective method to form stable highly concentrated nanoparticle suspensions. In this work, the effect of high-energy stirred media milling on aqueous Hombikat UV100 TiO 2 (Huntsman) with milling times of 0.5–96 h, containing highly concentrated suspensions with 17 wt%, was investigated. The suspensions were stabilized with nitric acid and compared with its commercial as prepared analogue Hombikat XXS100 (Huntsman). Stable and photoactive suspensions could be formed via ball milling without a loss of photoactivity between milling times of 0.5 and 2 h. To characterize the suspensions, they were freeze-dried obtaining the pure powder. It was found that the BET surface areas, the assembled structure of aggregates and agglomerates as well as particle and mesopore size distribution were decreased with increasing milling time as do the photonic efficiencies. The experimental results support the antenna mechanism theory and show that the effect of aggregates and agglomerates is highly underestimated in photocatalytic systems.
UR - http://www.scopus.com/inward/record.url?scp=84987617575&partnerID=8YFLogxK
U2 - 10.1007/s10853-016-0400-z
DO - 10.1007/s10853-016-0400-z
M3 - Article
VL - 52
SP - 1047
EP - 1056
JO - Journal of materials science
JF - Journal of materials science
SN - 0022-2461
IS - 2
ER -