Hydrogen Gas Sensor Based on Nanograined Pd/α-MoO3 Belts

被引：1
|
作者：
Cretu, V. [1 ]
Postica, V. [1 ]
Stoianov, D. [1 ]
Trofim, V. [1 ]
Sontea, V. [1 ]
Lupan, O. [1 ,2 ]
机构：
[1] Tech Univ Moldova, Dept Microelect & Biomed Engn, Kishinev, Moldova
[2] Univ Kiel, Inst Mat Sci Funct Nanomat, Kiel, Germany
来源：
3RD INTERNATIONAL CONFERENCE ON NANOTECHNOLOGIES AND BIOMEDICAL ENGINEERING | 2016年 / 55卷
关键词：
MoO3; hydrogen; gas sensor; nanostructured; mechanism; SENSING PROPERTIES; THIN-FILMS; MOO3; XPS;
D O I：
10.1007/978-981-287-736-9_87
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
In this work, a simple and cost-effective method for nanostructurization of alpha-MoO3 micro-belts by using an aqueous solution of PdCl2 is reported. Obtained nanograined Pd/alpha-MoO3 belts, with 70-80 nm average diameters of nanocrystallites were integrated in sensor structures for application in hydrogen gas sensing. In dependence of method for nano-structurization, a gas response of about 2-3 at 200 degrees C operating temperature was obtained. In case of K+ doped samples, the hydrogen response was enhanced to about 7.5. To explain the obtained results, the gas sensing mechanism based on catalyst properties of Pd nanoparticles and generation of oxygen vacancies is discussed in details.
引用
收藏
页码：361 / 364
页数：4
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