TY - JOUR

T1 - Reaction Rate Study of the Photocatalytic Degradation of Dichloroacetic Acid in a Black Body Reactor

AU - Megatif, Lena

AU - Dillert, Ralf

AU - Bahnemann, Detlef W.

N1 - Funding information: Financial support from the Global Research Laboratory program (2014 K1 A1 A2041044), Korea government (MSIP) through NRF is gratefully acknowledged. Financial support from the Global Research Laboratory program (2014 K1 A1 A2041044), Korea government (MSIP) through NRF is gratefully acknowledged. Acknowledgments: L.M. gratefully acknowledges a scholarship of the Deutscher Akademischer Austauschdienst (DAAD). The unknown reviewers are thanked for their valuable comments. R.D. thanks Jonathan Z. Bloh (DECHEMA-Forschungsinstitut, Frankfurt, Germany) for a stimulating discussion. The publication of this article was funded by the Open Access Fund of the Gottfried Wilhelm Leibniz Universität Hannover. Acknowledgments: L.M. gratefully acknowledges a scholarship of the Deutscher Akademischer Austauschdienst (DAAD). The unknown reviewers are thanked for their valuable comments. R.D. thanks Jonathan Z. Bloh (DECHEMA?Forschungsinstitut, Frankfurt, Germany) for a stimulating discussion. The publication of this article was funded by the Open Access Fund of the Gottfried Wilhelm Leibniz Universität Hannover.

PY - 2019/8

Y1 - 2019/8

N2 - The light-induced degradation of dichloroacetic acid in aqueous suspensions containing the TiO2 photocatalyst Hombikat UV 100 was investigated. The reactions were performed in a black body reactor in which the rate of conversion, defined as the time derivative of the extent of conversion, is not affected by the light scattering properties of the photocatalysts. At sufficiently high concentrations of both the probe compound and the photocatalyst the rate of conversion was found to be unswayed by the initial concentration of the probe compound, the mass concentration of the photocatalyst, and the suspension volume. Thus, the chosen experimental conditions enable the determination of the rate of conversion and the quantum yield of the light induced degradation of dichloroacetic acid in aqueous photocatalyst suspension with sufficiently good reproducibility. The experimental procedure employed here seems to be generally applicable to determine rates of conversion and quantum yields that possibly allow a comparison of the activities of photocatalysts in aqueous suspensions.

AB - The light-induced degradation of dichloroacetic acid in aqueous suspensions containing the TiO2 photocatalyst Hombikat UV 100 was investigated. The reactions were performed in a black body reactor in which the rate of conversion, defined as the time derivative of the extent of conversion, is not affected by the light scattering properties of the photocatalysts. At sufficiently high concentrations of both the probe compound and the photocatalyst the rate of conversion was found to be unswayed by the initial concentration of the probe compound, the mass concentration of the photocatalyst, and the suspension volume. Thus, the chosen experimental conditions enable the determination of the rate of conversion and the quantum yield of the light induced degradation of dichloroacetic acid in aqueous photocatalyst suspension with sufficiently good reproducibility. The experimental procedure employed here seems to be generally applicable to determine rates of conversion and quantum yields that possibly allow a comparison of the activities of photocatalysts in aqueous suspensions.

KW - Black body photoreactor

KW - Dichloroacetic acid

KW - Heterogeneous photocatalysis

KW - Quantum yield

KW - Rate of conversion

KW - Titanium dioxide

UR - http://www.scopus.com/inward/record.url?scp=85070702355&partnerID=8YFLogxK

U2 - 10.3390/catal9080635

DO - 10.3390/catal9080635

M3 - Article

VL - 9

JO - CATALYSTS

JF - CATALYSTS

SN - 2073-4344

IS - 8

M1 - 635

ER -