Active carbon fiber adsorbent and preparation method and application of active carbon fiber adsorbent in benzene series adsorption

The invention provides an active carbon fiber adsorbent preparation method, which belongs to the field of processing of a volatile organic compound. The method comprises the following steps: mixing aboron precursor, a water-soluble nitrogenous organic substance, an active auxiliary agent, a surfactant and water to obtain a mixed solution, wherein the active auxiliary agent is glucose, citric acidor ascorbic acid, and the boron precursor is m-aminophenylboronic acid, p-aminophenylboronic acid, m-cyanophenylboronic acid or p-cyanophenylboronic acid; and mixing the mixed solution and the activecarbon fiber and performing a hydro-thermal reaction to obtain the active carbon fiber adsorbent. The active carbon fiber adsorbent can generate a fluffy boron doped nitrogen carbide coating layer with a nano size, uniform distribution, high boron element content and taking an active B-N bond as a main form on the active carbon surface, content of boron and nitrogen elements of the surface of a carbon material can be great