Direct preparation of activated carbon fiber aerogel via pyrolysis of cotton under CO2 atmosphere and its adsorption of methylene blue. Issue 9 (2nd May 2020)

• Record Type: Journal Article
• Authors: Cao, Junrui; Ma, Yuhui
• Is Part Of: Energy sources. Volume 42:Issue 9(2020)
• Page Start: 1108
• Page End: 1117
• Publication Date: 2020-05-02
• Subjects: Activated carbon fiber aerogel -- cotton -- CO2 activation -- characterization -- adsorption; Natural resources -- Periodicals; Energy consumption -- Periodicals; Energy consumption -- Climatic factors -- Periodicals; Energy conversion -- Periodicals; Energy conversion -- Environment aspects -- Periodicals; Power (Mechanics) -- Periodicals; 333.7905
• DOI: 10.1080/15567036.2019.1602221
• Languages: English
• ISSNs: 1556-7036

Abstract

ABSTRACT: A novel activated carbon fiber aerogel (ACFA) was prepared in one step via pyrolysis of cotton under pure CO2 atmosphere. The product was characterized by scanning electron microscope (SEM), N2 -adsorption/desorption, Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). The adsorption isotherms and kinetics of methylene blue (MB) by the product were elucidated. The experimental results demonstrated that ACFA had a twisted fibrous structure with a diameter of about 5 μm. The BET surface area and total pore volume of ACFA were up to 734 m 2 g –1 and 0.428 cm 3 g –1, respectively. ACFA had a highly turbostratic graphite structure with many oxygen-containing functional groups on its surface. The adsorption equilibrium data could be represented by Langmuir isotherm model, showing a maximum monolayer adsorption capacity of 204 mg g –1, and the kinetic data followed closely the pseudo-second-order kinetic model. The results proved that cotton could be a promising candidate for the preparation of ACFA with developed porous structure and high adsorption capacity.