Micrometer-sized nanoporous tin dioxide spheres for gas sensing

被引：19

作者：

Smatt, J. -H. ^{[2
]}

Linden, M. ^{[2
]}

Wagner, T. ^{[3
]}

Kohl, C. -D. ^{[3
]}

Tiemann, M. ^{[1
]}

机构：

[1] Univ Paderborn, Fac Sci, Dept Chem, D-33098 Paderborn, Germany

[2] Abo Akad Univ, Dept Phys Chem, Ctr Funct Mat, FIN-20500 Turku, Finland

[3] Univ Giessen, Inst Appl Phys, D-35392 Giessen, Germany

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2011年 / 155卷 / 02期

基金：

芬兰科学院;

关键词：

Mesoporous; Nanoporous; Tin dioxide; Gas sensor; Nanocasting; GRAIN-SIZE; MESOPOROUS SNO2; SENSORS; MICROSPHERES; SENSITIVITY; OXIDES;

D O I：

10.1016/j.snb.2010.12.051

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We report the synthesis of mesoporous tin dioxide (SnO2) materials with well-defined particle morphology. The products consist of uniform spheres with a diameter of 5 mu m. The spheres are hierarchically porous with two distinct pore modes of 5.0 nm and 52 nm, respectively. This special porosity is the result of a synthesis procedure which involves a 'hard templating' (nanocasting) process. The product forms an approximately homogeneous monolayer of spheres on a sensor substrate and shows promising response to methane gas with low cross-sensitivity to water. The structural properties and gas-sensing performance are compared with a mesoporous SnO2 material without defined morphology, prepared by a 'soft templating' procedure. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：483 / 488

页数：6

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