Nanoscale SnO2 Hollow Spheres and Their Application as a Gas-Sensing Material

被引：186

作者：

Gyger, Fabian ^{[1
]}

Huebner, Michael ^{[2
]}

Feldmann, Claus ^{[1
]}

Barsan, Nicolae ^{[2
]}

Weimar, Udo ^{[2
]}

机构：

[1] Karlsruhe Inst Technol, Inst Anorgan Chem, D-76131 Karlsruhe, Germany

[2] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

来源：

CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 16期

关键词：

MICROEMULSION APPROACH; TIN DIOXIDE; PHASE-TRANSITIONS; LATTICE-DYNAMICS; RUTILE STRUCTURE; METAL DIOXIDES; HIGH-PRESSURE; SENSORS; OXIDE; DIAMOND;

D O I：

10.1021/cm1011235

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：

The use of nanoscale SnO2 hollow spheres as a redox-active sensor is investigated. The underlying hollow spheres are prepared via a microemulsion approach and exhibit an outer diameter of about 15-25 nm, a highly crystalline shell with a thickness of 3-5 nm and an inner cavity of 10-20 nm in diameter. Subsequent to materials characterization based on SEM, STEM, TEM, IR, TG, BET, and XRD the applicability of as-prepared hollow spheres as highly porous layers in sensor operation is tested. Accordingly, SnO2 hollow spheres deposited on common sensor substrates show a good response to CO in a concentration range of 50 to 300 ppm. Moreover, the material turned out to be useful as a model system to study the conduction model of a porous layer with small grains.

引用

页码：4821 / 4827

页数：7

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