TY - JOUR
T1 - Two photoenergy conversion modes of YVO4:Eu3+ nanoparticles
T2 - Photoluminescence and photocatalytic activity
AU - Shiraishi, Yusuke
AU - Takeshita, Satoru
AU - Isobe, Tetsuhiko
N1 - Publisher Copyright:
© 2015 American Chemical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2015/6/18
Y1 - 2015/6/18
N2 - In this work we propose Eu3+-doped YVO4 as a model compound of a multimodal photoenergy converter that shows photoluminescence and photocatalytic activity and discuss the relation between these two photoenergy conversion modes. YVO4:Eu3+ nanoparticles with different Eu3+ concentrations and distributions were prepared by coprecipitation and ion exchange methods. The obtained samples consisted of elliptical nanoparticles of 20-25 nm in mean size, irrespective of the Eu3+ concentration and distribution. The nanoparticles showed two photoenergy converting functions under UV irradiation: (i) Red photoluminescence corresponding to a 4f → 4f transition of Eu3+ and (ii) photocatalytic decomposition of methyl orange. Increase in the Eu3+ concentration increased the photoluminescence quantum yield but decreased the photocatalytic activity. Localizing Eu3+ ions at the particle surface increased the photocatalytic activity but decreased the photoluminescence quantum yield. These results imply a competitive relation between photoluminescence and photocatalytic activity for the compositional range used in this work.
AB - In this work we propose Eu3+-doped YVO4 as a model compound of a multimodal photoenergy converter that shows photoluminescence and photocatalytic activity and discuss the relation between these two photoenergy conversion modes. YVO4:Eu3+ nanoparticles with different Eu3+ concentrations and distributions were prepared by coprecipitation and ion exchange methods. The obtained samples consisted of elliptical nanoparticles of 20-25 nm in mean size, irrespective of the Eu3+ concentration and distribution. The nanoparticles showed two photoenergy converting functions under UV irradiation: (i) Red photoluminescence corresponding to a 4f → 4f transition of Eu3+ and (ii) photocatalytic decomposition of methyl orange. Increase in the Eu3+ concentration increased the photoluminescence quantum yield but decreased the photocatalytic activity. Localizing Eu3+ ions at the particle surface increased the photocatalytic activity but decreased the photoluminescence quantum yield. These results imply a competitive relation between photoluminescence and photocatalytic activity for the compositional range used in this work.
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U2 - 10.1021/acs.jpcc.5b03425
DO - 10.1021/acs.jpcc.5b03425
M3 - Article
AN - SCOPUS:84934937079
VL - 119
SP - 13502
EP - 13508
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 24
ER -