葡萄糖改性对活性炭吸附与脱附β-苯乙醇性能的影响

摘要

Glucose modification was proposed to modify activated carbons (ACs) to regulate bonding force between ACs and-phenylethanol. Effects of modification temperature on ACs pore structure and surface groups, and thus for their performances of adsorption and desorption -phenylethanol were investigated. Results show that glucose modification have no significant influence on absorbtion profermance of ACs. However, the modification increased acid sites on surface, which probably weakened π-π dispersion force between carbon surface and -phenylethanol. Because of that, desorption property of modified ACs was probably improved.%为调控活性炭材料对 -苯乙醇的吸附结合力,改善 -苯乙醇在活性炭上的脱附性能,以葡萄糖作为碳化剂,考察不同碳化温度对活性炭表面孔隙结构、酸性基团含量以及吸附和脱附 -苯乙醇性能的影响.研究表明:葡萄糖对活性炭的改性未显著改变材料吸附储存 -苯乙醇的性能;但当碳化温度为300℃时,由于活性碳表面酸性基团含量升高,削弱了表层碳原子的π电子与 -苯乙醇上苯环的π电子之间的π-π色散作用,从而使其对 -苯乙醇的吸附结合力下降,脱附性能得以提升.