Details
| Original language | English |
|---|---|
| Pages (from-to) | 698-703 |
| Number of pages | 6 |
| Journal | Catalysis today |
| Volume | 355 |
| Early online date | 3 Jun 2019 |
| Publication status | Published - 15 Sept 2020 |
Abstract
Quantum yields of the photocatalytic DCA degradation in aqueous titanium dioxide suspensions (Hombikat UV100, Aeroxide P25) were determined employing a black body like photoreactor. The amounts of photons absorbed by the photocatalysts per unit time were determined by chemical actinometry varying the photon flux and the photon flux density. The photocatalytic DCA degradation experiments were performed under zero order conditions regarding the concentration of the probe compound. The obtained results suggest that the quantum yield of the photocatalytic DCA degradation depends on the photon flux density. Only the low flux density resulting from a large surface area of the light inlet seems to allow the determination of a quantum yield as a photocatalyst-inherent property.
Keywords
- Black body photoreactor, Dichloroacetic acid, Heterogeneous photocatalysis, Quantum yield, Titanium dioxide
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- General Chemistry
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In: Catalysis today, Vol. 355, 15.09.2020, p. 698-703.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Determination of the quantum yield of a heterogeneous photocatalytic reaction employing a black body photoreactor
AU - Megatif, L.
AU - Dillert, R.
AU - Bahnemann, D.W.
N1 - Funding information: L.M. gratefully acknowledges a scholarship of the Deutscher Akademischer Austauschdienst (DAAD) . Financial support from the Global Research Laboratory program ( 2014 K1 A1 A2041044 ), Korea government (MSIP) through NRF is gratefully acknowledged. L.M. gratefully acknowledges a scholarship of the Deutscher Akademischer Austauschdienst (DAAD). Financial support from the Global Research Laboratory program (2014 K1 A1 A2041044), Korea government (MSIP) through NRF is gratefully acknowledged.
PY - 2020/9/15
Y1 - 2020/9/15
N2 - Quantum yields of the photocatalytic DCA degradation in aqueous titanium dioxide suspensions (Hombikat UV100, Aeroxide P25) were determined employing a black body like photoreactor. The amounts of photons absorbed by the photocatalysts per unit time were determined by chemical actinometry varying the photon flux and the photon flux density. The photocatalytic DCA degradation experiments were performed under zero order conditions regarding the concentration of the probe compound. The obtained results suggest that the quantum yield of the photocatalytic DCA degradation depends on the photon flux density. Only the low flux density resulting from a large surface area of the light inlet seems to allow the determination of a quantum yield as a photocatalyst-inherent property.
AB - Quantum yields of the photocatalytic DCA degradation in aqueous titanium dioxide suspensions (Hombikat UV100, Aeroxide P25) were determined employing a black body like photoreactor. The amounts of photons absorbed by the photocatalysts per unit time were determined by chemical actinometry varying the photon flux and the photon flux density. The photocatalytic DCA degradation experiments were performed under zero order conditions regarding the concentration of the probe compound. The obtained results suggest that the quantum yield of the photocatalytic DCA degradation depends on the photon flux density. Only the low flux density resulting from a large surface area of the light inlet seems to allow the determination of a quantum yield as a photocatalyst-inherent property.
KW - Black body photoreactor
KW - Dichloroacetic acid
KW - Heterogeneous photocatalysis
KW - Quantum yield
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=85066811034&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2019.06.008
DO - 10.1016/j.cattod.2019.06.008
M3 - Article
VL - 355
SP - 698
EP - 703
JO - Catalysis today
JF - Catalysis today
SN - 0920-5861
ER -