Pressure dependent luminescence in titanium dioxide particles modified with europium ions

被引：8

作者：

Almeida, Nuno A. F. ^{[1
,2
]}

Rodrigues, Joana ^{[3
,4
]}

Silva, Patricia ^{[1
,2
]}

Emami, Nazanin ^{[5
]}

Soares, Manuel J. ^{[3
,4
]}

Monteiro, Teresa ^{[3
,4
]}

Lopes-da-Silva, Jose A. ^{[6
,7
]}

Marques, Paula A. A. P. ^{[1
,2
]}

机构：

[1] Univ Aveiro, Dept Mech Engn, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, TEMA, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[3] Univ Aveiro, Dept Phys, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[4] Univ Aveiro, I3N, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[5] Lulea Univ Technol, Dept Engn Sci & Math, S-97187 Lulea, Sweden

[6] Univ Aveiro, Dept Chem, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[7] Univ Aveiro, QOPNA, Campus Univ Santiago, P-3810193 Aveiro, Portugal

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 234卷

关键词：

Titanium dioxide; Europium; Photoluminescence; Vacuum sensor; DOPED TIO2; DEGRADATION; CONVERSION; ANATASE; RUTILE; XPS;

D O I：

10.1016/j.snb.2016.04.157

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Particles of titanium dioxide were prepared in the presence of europium ions (TiO2:Eu) by a solvothermal method and thermal annealed in air at 500 degrees C. The spectroscopic properties of TiO2:Eu particles were analyzed indicating that the Eu3+ ions are likely distributed at the surface or near the surface of the titanium dioxide particles. The photoluminescence analysis showed that the intraionic emission was strongly sensitive to reduced pressure conditions, as seen by its absence under vacuum conditions. The ion emission was re-established as soon as the atmosphere was restored. Additionally, the ion integrated emission intensity follows a linearly dependence with pressure in the range of 150-800 mbar revealing a high sensitivity to small variations in pressure, which is an unprecedented result. This innovation will allow the study of new technologies in the area of low vacuum sensors where TiO2:Eu may act as the active element of an optical sensor for a pressure device. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：137 / 144

页数：8

共 38 条

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