Method for making active carbon fibers of cotton stalk skins by using microwave method

The invention discloses a method for making active carbon fibers of cotton stalk skins by using the microwave method, comprising the following steps of: (1) a biological treatment: washing cotton stalk skins and removing impurities, cutting the cotton stalk skins into segments, inoculating with white rot fungi to ferment, washing and drying; (2) a chemical treatment: dipping cotton stalk skin fibers processed from the Step (1) into a KOH, NaOH or H3PO4 solution; (3) placing the cotton stalk skin fibers dipped in Step (2) into a microwave oven for carbonization and activation, taking the carbonized and activated cotton stalk skin fibers out of the microwave oven after cooling to room temperature, washing the cotton stalk skin fibers to pH 6-7, kiln drying or air drying to produce the active carbon fibers of cotton stalk skins. The method for making active carbon fibers by using cotton stalk skins as the raw material in the invention has advantages of simple preparation technology, fast preparation speed, low energy consumption, sufficient raw material and low price. The active carbon fibers prepared by using the method have a high carbon content rate, well-developed pores, strong sorption and excellent performance, can effectively remove harmful pollutants, and is good for environmental protection.