Activated Carbon Fiber Production and Adsorption Applications
Summary
Activated carbon fibres (ACFs) represent a versatile class of porous adsorbents distinguished by their fibrous morphology, high specific surface area and finely tuned pore structure. Production typically involves three stages: stabilisation or crosslinking of the precursor fibre to prevent melting, carbonisation under inert atmosphere to convert the polymer to a carbon matrix, and activation by chemical agents (such as KOH, ZnCl₂ or H₃PO₄) or physical means (steam, CO₂) to develop micro‐ and mesoporosity. Choice of precursor—ranging from natural polymers (cellulose, lignin) to synthetic polymers (polyacrylonitrile, polyethylene)—and activation conditions govern final textural and surface‐chemical properties. The resulting ACFs combine a network of micropores (<2 nm) for high uptake of small molecules with mesopores (2–50 nm) that facilitate rapid diffusion of larger species. Surface functionalities (acidic or basic groups, magnetic particles) can be tailored to enhance affinity for targeted adsorbates. Applications span aqueous‐phase removal of heavy metals, dyes and organic pollutants; gas‐phase capture of volatile organic compounds, hydrocarbons and chemical warfare simulants; and roles in gas separation, energy storage and protective clothing. The global importance of ACF technology lies in its capacity for efficient resource recovery, pollution control and process intensification in water treatment, air purification and advanced filtration systems.
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Activated Carbon Fiber Production and Adsorption Applications publication trend
The graph below shows the total number of articles in activated carbon fiber production and adsorption applications across all publications each year (not limited to Nature Index journals).
Technical terms
Activated carbon fiber: A fibrous carbon material obtained by carbonisation and activation of polymeric precursors, characterised by high surface area and porosity.
Chemical activation: A process in which a carbon precursor is impregnated with activating agents (e.g. KOH, ZnCl₂, H₃PO₄) and heated to develop porosity.
Physical activation: Activation by oxidising gases (CO₂, steam) at elevated temperatures to etch the carbon matrix and form pores.
Micropores: Pores with diameters less than 2 nm that provide high adsorption capacities for small molecules.
Mesopores: Pores with diameters between 2 nm and 50 nm, which enhance mass transport and diffusion of larger adsorbates.
References
- Adsorption Property, Kinetic and Equilibrium Studies of Activated Carbon Fiber Prepared from Liquefied Wood by Zncl2 Activation. Materials (2019).
- Preparation of Cellulose-Based Activated Carbon Fibers with Improved Yield and Their Methylene Chloride Adsorption Evaluation. Molecules (2023).
- Facile Preparation of Polyacrylonitrile-Based Activated Carbon Fiber Felts for Effective Adsorption of Dipropyl Sulfide. Polymers (2024).
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