Hollow structure biomass activated carbon fiber and preparation method thereof

Abstract

The invention discloses hollow structure biomass activated carbon fiber and a preparation method thereof. Metaplexis japonica seed hair fiber with a hollow structure is adopted as an activated carbonfiber precursor, and wax removal, phosphoric acid activation, low-temperature pre-oxidation and high-temperature carbonization are performed to prepare the hollow structure biomass activated carbon fiber with the high hollow structure; the prepared hollow structure biomass activated carbon fiber has the characteristics of light weight and double surfaces of an inner layer and an outer layer; compared with solid fiber, the specific surface area is significantly increased; by performance testing, the hollow structure biomass activated carbon fiber prepared with the method has the specific surface area which reaches up to 1,882.003 m<2>/cm<3> and the average pore diameter being 3.056 nm, and has developed mesoporous distribution; and an XRD result shows that a graphite-like microcrystalline refined structure appears in the biomass activated carbon fiber.

Description

technical field [0001] The invention relates to the technical field of activated carbon fiber preparation, in particular to a hollow-structured biomass activated carbon fiber and a preparation method thereof. Background technique [0002] Activated carbon fiber is a new type of carbon functional material. It is the third generation of activated carbon products after powder activated carbon and granular activated carbon. It has high specific surface area, abundant active groups and developed pore structure. Wide, fast adsorption, convenient regeneration and long service life, it has broad application prospects in the fields of environment, chemistry, medical treatment, food, electronics and so on. [0003] Activated carbon fibers are mainly prepared from precursor fibers through pretreatment, carbonization, activation and other processes. The precursors for preparing activated carbon fibers in the early stage mainly include phenolic-based, polyacrylonitrile-based, pitch-base...

AI Technical Summary

Problems solved by technology

With the popularization of the concept of green and sustainable development, the precursors used to prepare activated carbon fibers can no longer meet the needs of environmental development

[0004] At the same time, the inventors of the present application have found that most of the existing activated carbon fibers are solid fibers. Due to the relatively low specific surface area, the reaction performance is limited, thereby affecting the application of carbon fibers in different fields.

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