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Biomass Chemical Engineering ›› 2020, Vol. 54 ›› Issue (3): 9-17.doi: 10.3969/j.issn.1673-5854.2020.03.002

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Preparation and Properties of Cattail-leaf-based Activated Carbon

Yao LI,Miao YU,Dong LYU,Lijuan WANG*()   

  1. Key Laboratory of Bio-based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
  • Received:2019-05-05 Online:2020-05-30 Published:2020-06-13
  • Contact: Lijuan WANG E-mail:donglinwlj@163.com

Abstract:

Activated carbon(CL-AC) was prepared from cattail leaves(CL) by two-step procedures using CO2 as activation agent.The structure and morphology of CL-AC were characterized by scanning electron microscopy and nitrogen adsorption.The activated carbon(CL-AC3) obtained under activation temperature 800 ℃ and activation time 20 min had the maximum specific surface area(570.03 m2/g).And CL-AC3 resulted in outstanding capacitance retention of 90.56% over 5 000 cycles.The specific capacitance reached 111 F/g at the current density of 0.5 A/g.The adsorption conditions of methylene blue on CL-AC3 were optimized by single factor test and the optimum conditions were absorbent 12.5 mg, initial mass concentration of methylene blue 50 mg/L, temperature 303.15 K and time 300 min, under these conditions the adsorption capacity reached 199.22 mg/g.The adsorption process and equilibrium of methylene blue on CAC closely obeyed the pseudo-second-order kinetic model and Langmuir isotherm.The adsorption was endothermic, spontaneous, and a physically controlled process.

Key words: cattail-leaf-based activated carbon, electrochemical, adsorption, methylene blue

CLC Number: