Influence of Different Activators on the Structure and Properties of Activated Carbon Based on Bamboo Fiber

Abstract

In order to explore the influence of different activators on the structure and properties of the prepared activated carbon, bamboo fiber-based activated carbons (BFACs) were prepared by four activators of phosphoric acid, pyrophosphoric acid, zinc chloride, and diammonium biphosphate (BFAC-H3PO4, BFAC-H4P2O7, BFAC-ZnCl2, and BFAC-(NH4)2HPO4) and BFACs adsorption performance and electrochemical properties were investigated. The main conclusions were: the specific surface area of the four BFACs varies greatly, among which BFAC-ZnCl2 was the highest, at 1908.5074 m2/g, and BFAC-(NH4)2HPO4 was the lowest, at 641.5941 m2/g. In terms of the pore structure, BFAC-H3PO4 and BFAC-H4P2O7 are mainly mesopores and BFAC-ZnCl2 and BFAC-(NH4)2HPO4 are mainly micropores. The BFAC-ZnCl2 sample had the largest specific capacitance, with a specific capacitance of 121.2730 F/g at a current density of 0.2 A/g, with a small internal resistance and good electrochemical reversibility and capacitance performance. The adsorption properties were better for BFAC-ZnCl2 and BFAC-H3PO4 and the adsorption amounts were 648.75 and 548.75 mg/g, respectively.