Large Mesoporous Tin Dioxide Powders for Gas Sensor Materials-Effects of Various Additives on the Mesostructure and the H_2 Sensing Properties

作     者：Takeo Hyodo Kumiko Murayama Yasuhiro Shimizu Makoto Egashira 

作者机构：Department of Materials Science and EngineeringFaculty of EngineeringNagasaki University1-14 Bunkyo-machiNagasaki 852-8521Japan 

出 版 物：《稀有金属材料与工程》 (Rare Metal Materials and Engineering)

年 卷 期：2006年第35卷第A3期

页      面：455-458页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：mesoporous tin dioxide triblock copolymer triethoxyorthosilicate hydrogen gas sensor 

摘      要：Preparation of large mesoporous tin dioxide (lm-SnO_2) under various conditions was attempted by utilizing a self-assembly of a triblock copolymer,P123:(EO)_(20)(PO)_(70)(EO)_(20) or F127:(EO)_(106)(PO)_(70)(EO)_(106)(EO:ethylene oxide and PO: propylene oxide).The sensor fabricated from calcined lm-SnO_2 powder,which had been prepared by using P123 as a template,Na_2SnO_3 as a tin source,and TEOS as an additive ([TEOS]/[Na_2SnO_3]=0.5 in the precursor solution),showed the largest response to 1×10^(-3) hydrogen at 350℃among the sensors *** existence of two kinds of SnO_2 particles with different sizes (ca.100 nm and several nm in diameter) may be important to improve the hydrogen sensing properties drastically.