A kinetic model for evaluating the dependence of the quantum yield of nano-TiO2 based photocatalysis on light intensity, grain size, carrier lifetime, and minority carrier diffusion coefficient: Indirect interfacial charge transfer
作者： Baoshun Liu , Xiujian Zhao
DOI: 10.1016/J.ELECTACTA.2010.01.087
关键词:
摘要: Abstract A model based on spherical TiO 2 nanoparticles was developed to study heterogeneous photocatalysis in the case of indirect interfacial charge transfer. In this model, effect light intensity ( I 0 ), grain size r carrier lifetime τ p and minority diffusion coefficient D ) quantum yield (QY) photocatalytic reactions investigated detail. Under conditions sufficiently low incident-light intensity, QY found be ∝ , while it decreased rapidly with an increase . addition, went zero at a critically high intensity. Furthermore, decrease increasing due bulk-recombination loss, became increasingly stronger The which more apparent [(RH aq ], increased remained nearly constant ] fact that photoinduced electron transfer limiting step for ].
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P. E. de Jongh, D. Vanmaekelbergh, INVESTIGATION OF THE ELECTRONIC TRANSPORT PROPERTIES OF NANOCRYSTALLINE PARTICULATE TIO2 ELECTRODES BY INTENSITY-MODULATED PHOTOCURRENT SPECTROSCOPY Journal of Physical Chemistry B. ,vol. 101, pp. 2716- 2722 ,(1997) , 10.1021/JP962226N
Fei Cao, Gerko Oskam, Gerald J. Meyer, Peter C. Searson, ELECTRON TRANSPORT IN POROUS NANOCRYSTALLINE TIO2 PHOTOELECTROCHEMICAL CELLS The Journal of Physical Chemistry. ,vol. 100, pp. 17021- 17027 ,(1996) , 10.1021/JP9616573
P. Salvador, Hole diffusion length in n‐TiO2 single crystals and sintered electrodes: Photoelectrochemical determination and comparative analysis Journal of Applied Physics. ,vol. 55, pp. 2977- 2985 ,(1984) , 10.1063/1.333358
Iván Mora-Seró, Teresa Lana Villarreal, Juan Bisquert, Ángeles Pitarch, Roberto Gómez, Pedro Salvador, Photoelectrochemical Behavior of Nanostructured TiO2 Thin-Film Electrodes in Contact with Aqueous Electrolytes Containing Dissolved Pollutants: A Model for Distinguishing between Direct and Indirect Interfacial Hole Transfer from Photocurrent Measurements Journal of Physical Chemistry B. ,vol. 109, pp. 3371- 3380 ,(2005) , 10.1021/JP045585O
Jenny Nelson, None, Continuous-time random-walk model of electron transport in nanocrystalline TiO 2 electrodes Physical Review B. ,vol. 59, pp. 15374- 15380 ,(1999) , 10.1103/PHYSREVB.59.15374
T. Lana Villarreal, R. Gómez, M. Neumann-Spallart, N. Alonso-Vante, P. Salvador, Semiconductor Photooxidation of Pollutants Dissolved in Water: A Kinetic Model for Distinguishing between Direct and Indirect Interfacial Hole Transfer. I. Photoelectrochemical Experiments with Polycrystalline Anatase Electrodes under Current Doubling and Absence of Recombination Journal of Physical Chemistry B. ,vol. 108, pp. 15172- 15181 ,(2004) , 10.1021/JP049447A
AKIRA FUJISHIMA, KENICHI HONDA, Electrochemical Photolysis of Water at a Semiconductor Electrode Nature. ,vol. 238, pp. 37- 38 ,(1972) , 10.1038/238037A0
Leeor Kronik, Yoram Shapira, Surface photovoltage phenomena: theory, experiment, and applications Surface Science Reports. ,vol. 37, pp. 1- 206 ,(1999) , 10.1016/S0167-5729(99)00002-3
H. Gerischer, Photocatalysis in aqueous solution with small TiO2 particles and the dependence of the quantum yield on particle size and light intensity Electrochimica Acta. ,vol. 40, pp. 1277- 1281 ,(1995) , 10.1016/0013-4686(95)00058-M
Teresa Lana Villarreal, Roberto Gómez, M. González, P. Salvador, A Kinetic Model for Distinguishing between Direct and Indirect Interfacial Hole Transfer in the Heterogeneous Photooxidation of Dissolved Organics on TiO2 Nanoparticle Suspensions Journal of Physical Chemistry B. ,vol. 108, pp. 20278- 20290 ,(2004) , 10.1021/JP046539R