Photoluminescence of anatase and rutile TiO2 particles

被引：436
作者：
Abazovic, Nadica D.
Comor, Mirjana I.
Dramicanin, Miroslav D.
Jovanovic, Dragana J.
Ahrenkiel, S. Phillip
Nedeljkovic, Jovan M.
机构：
[1] Vinca Inst Nucl Sci, Belgrade 11001, Serbia
[2] Natl Renewable Energy Lab, Golden, CO 80401 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 50期
关键词：
ANTI-STOKES PHOTOLUMINESCENCE; ENERGY UP-CONVERSION; NANOSIZE RUTILE; VISIBLE-LIGHT; ULTRAFINE PARTICLES; SIZE QUANTIZATION; TITANIA; LUMINESCENCE; EFFICIENCY; STATE;
D O I：
10.1021/jp064454f
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nonaqueous reactions between titanium(IV) chloride and alcohols ( benzyl alcohol or n-butanol) were used for the synthesis of anatase TiO2 particles, while rutile TiO2 particles were synthesized in aqueous media by acidic hydrolysis of titanium( IV) chloride. The X-ray diffraction measurements proved the exclusive presence of either the anatase or the rutile phase in prepared samples. The photoluminescence of both kinds of particles (anatase and rutile) with several well-resolved peaks extending in the visible spectral region was observed, and the quantum yield at room temperature was found to be 0.25%. Photon energy up-conversion from colloidal anatase and rutile TiO2 particles was observed at low excitation intensities. The energy of up-converted photoluminescence spans the range of emission of normal photoluminescence. The explanation of photon energy up-conversion involves mid-gap energy levels originating from oxygen vacancies.
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页码：25366 / 25370
页数：5
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