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
收藏
页码：483 / 488
页数：6
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