Effect of pyrolysis temperature on properties of ACF/CNT composites

Abstract

Activated carbon fiber/carbon nanotube (ACF/CNT) composites were fabricated by chemical vapor deposition (CVD) process. The effects of pyrolysis temperature on properties of ACF/CNT composites, including BET specific surface area, mass increment rate and adsorption efficiency for rhodamine B in solution, were investigated by scanning electron microscopy. The results show that the pyrolysis temperature is a key factor affecting the qualities of ACF/CNT composites. The mass increment rate and BET specific surface area sharply decrease with the increase of pyrolysis temperatures from 550 °C to 850 °C and the minimum diameter of CNTs appears at 750 °C. The maximum adsorption efficiency of ACF/CNT composites for rhodamine B is obtained at 650 °C. ACF/CNT composites are expected to be useful in adsorption field.

Keywords

ACF/CNT composites / pyrolysis temperature / chemical vapor deposition / BET specific surface area / adsorption

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