Method for preparing activated carbon fibers with high specific surface by use of cotton linters

The invention relates to a method for preparing activated carbon fibers by the use of cotton linters, comprising the following steps of: placing cotton linters into a fermentation cylinder, inoculating turkey-tail or white rot fungus, performing a fermentation treatment, followed by washing again and drying; placing KOH or NaOH into a reaction vessel, heating until KOH or NaOH is melted; adding the treated cotton linters to the molten NaOH or KOH with the mass ratio of cotton linters to KOH or NaOH being 1:2-4, heating the mixture to the temperature of 600-800 DEG C, and performing a carbonization-activation treatment for 1-1.5 hours. The specific surface of the obtained cotton linter activated carbon fibers is over 2000m /g. The technology provided by the invention is simple and is used to accomplish waste utilization. The prepared activated carbon fibers have large specific surface, strong sorption as well as excellent performance, and can effectively remove harmful pollutants.