Tungsten Oxide

CO, the product of incomplete combustion of carbon fuels and cracking reactions occur at high temperatures, oxidation reaction ect. has become one of the major sources of air pollution, which greatly threats human life and health and environmental protection. The body of CO maximum allowable limit is 10 -4 , while in Europe the provisions of the environment CO must not exceed 10 -5 . So, the detection and controlling of CO is becoming urgent, tungsten trioxide based gas sensor is considered to be the most promising sensor for detecting NO x , O 2  and NH 3  and other poison gases, due to its simple structure, low cost, high sensitivity and gas sensing.  This paper presents preparation method of   tungsten trioxide nanowire CO gas sensor which shows as follow: 1. Dissolve the weighed analytically pure sodium tungstate dihydrate (Na 2 WO 4 .2H 2 O) in an appropriate amount of deionized water, and taken out ice water bath, magnet...