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林产化学与工业 ›› 2014, Vol. 34 ›› Issue (4): 77-82.doi: 10.3969/j.issn.0253-2417.2014.04.013

• 研究报告 • 上一篇    下一篇

表面掺氮活性炭的制备及其甲醛吸附性能研究

孙康1,2, 蒋剑春1,2, 卢辛成1, 陈超1, 贾羽洁1   

  1. 1. 中国林业科学研究院 林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局 林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室, 江苏 南京 210042;
    2. 中国林业科学研究院 林业新技术研究所, 北京 100091
  • 收稿日期:2013-06-06 出版日期:2014-08-25 发布日期:2015-08-18
  • 作者简介:孙康(1976-),男,安徽当涂人,副研究员,博士,主要从事炭材料研究与应用;E-mail:sunkang0226@163.com
  • 基金资助:
    中国林科院林业新技术所基本科研业务费专项资金(CAFINT2013C02)

Preparation of N-doped Activated Carbon and Effects of N-doping on Formaldehyde Adsorption

SUN Kang1,2, JIANG Jian-chun1,2, LU Xin-cheng1, CHEN Chao1, JIA Yu-jie1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    2. Research Institute of Forestry New Technology, CAF, Beijing 100091, China
  • Received:2013-06-06 Online:2014-08-25 Published:2015-08-18
  • Contact: 蒋剑春(1955-),男,研究员,博士,博士生导师,主要从事生物质能源和炭材料的研究开发工作;E-mail:bio-energy@163.com。 E-mail:bio-energy@163.com

摘要: 以苯胺(An)为氮源,在活性炭表面原位聚合、炭化制备掺氮活性炭,考察了苯胺添加量对活性炭的孔隙结构变化、表面含氮基团及甲醛平衡吸附量的影响。结果表明,活性炭与苯胺质量比10:2条件下制备的掺氮活性炭(AC2),其氮元素质量分数 2.05%,总孔容和中孔容有所下降,而微孔率略有增加,这一变化有利于气相分子吸附。AC2的甲醛平衡吸附量 379 mg/g,是市售气体净化用活性炭、竹炭的3~6倍,平衡吸附时间为6 h。通过活性炭表面掺氮,增大孔隙周围电子云密度,增强对甲醛中羰基碳正离子的吸引力。由此提供了一条由商品活性炭改性制备甲醛去除用活性炭的有效途径。

关键词: 活性炭, 甲醛, 掺氮, 吸附

Abstract: Aniline (An) as nitrogen source, N-doped activated carbon was prepared by in-situ polymerization and carbonization. Effects of added aniline on pore structure, external nitrogen-containing groups and formaldehyde equilibrium adsorption capacity of the modified activated carbon (AC) were investigated. Results showed that N-doping activated carbon (AC2) prepared by the mass ratio of mAn:mAC with 10:2 had very high gas adsorption capacity. The sample AC2 has nitrogen content of 2.05%, and its total pore volume and mesoporous volume decrease, whereas microporous volume increases slightly. AC2 has gotten formaldehyde equilibrium adsorption capacity 379 mg/g, which is 3-6 times high than commercial activated carbon and bamboo charcoal. Doping element N on the surface of activated carbon can increase the electron cloud density around the porosity and the attractiveness of carbonyl carbocation from formaldehyde. The present modification method is a promising convenient way to obtain the N-doped activated carbon with high removal capacity of formaldehyde.

Key words: activated carbon, formaldehyde, surface N-doped, adsorption

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