Improvement of gas sensing properties of carbon nanofibers based on polyacrylonitrile and pitch by steam activation

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 24권
ㆍ저자명 : Jeongsik Kim, Hyung-Il Kim, Jumi Yun

목차

Abstract
1. Introduction
2. Experimental
2.1. PAN/pitch nanofiber preparation
2.2. Thermal treatment and steam activation
2.3. Characterizations of the carbon nanofibers
3. Results and Discussion
3.1. Surface characterization of the PAN/pitchnanofibers
3.2. Effect of the pitch content on the electricalproperties of the carbon nanofibers
3.3. Pore structure of the carbon nanofibers
3.4. CO gas sensing characteristics of the carbonnanofibers
4. Conclusions
Conflict of Interest
Acknowledgements
References

영어 초록

Polyacrylonitrile/pitch nanofibers were prepared by electrospinning as a precursor for a gas sensor material. Pitch nanofibers were properly fabricated by incorporating polyacrylonitrile as an electrospinning supplement component. Polyacrylonitrile/pitch nanofibers were activated with steam at various temperatures followed by subsequent carbonization to make carbon nanofibers with a highly conductive graphitic structure. Steam activation was effective in facilitating gas adsorption onto the carbon nanofibers due to the increased surface area. The carbon nanofibers activated at 800°C had a larger surface area and a lower micro pore fraction resulting in a higher variation in electrical resistance for improved CO gas sensing properties.

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