| 摘要 |
The present invention relates to a member for a gas sensor, a gas sensor and a method for producing the same. Particularly, the present invention relates to a member for a gas sensor, which uses a metal oxide/nanotube composite material including a catalyst bound thereto by distributing a nanoparticle catalyst included in apoferritin into and onto the outer surface of one-dimensional nanotubes formed by controlling a heating rate, to a gas sensor and to a method for producing the same. According to the present invention, a protein called apoferritin having surface charges and high dispersibility is used as a template to form nanoparticles having a size of 0.1-5 nm, and the formed nanoparticle catalyst is mixed with a metal oxide precursor/polymer mixed electrospinning solution to carry out electrospinning so that the catalyst may be distributed to the composite nanofibers uniformly. In addition, a heating rate is controlled during a heat treatment process to form a metal oxide nanotube structure including the nanoparticle catalyst distributed uniformly thereon by using the Ostwald ripening phenomenon. The gas sensor has high sensitivity capable of detecting a trace amount of gas of about 100 ppb through the catalytic effect and shape control for increasing a reaction surface area, which are important factors for gas sensor characteristics. In addition, the gas sensor has high selectivity to allow detection of various gases through a variation in composition of materials. Further, it is possible to carry out catalyst binding simultaneously with shape control of nanotubes through a simple process by controlling electrospinning and heat treatment processes. Thus, it is possible to provide a member for a gas sensor capable of mass production, a gas sensor and a method for producing the same. |
