物理化学学报 >> 2016, Vol. 32 >> Issue (10): 2599-2605.doi: 10.3866/PKU.WHXB201607181

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介孔炭表面性质对吸附去除低浓度氨性能的影响

李春洋,耿龙龙,杨胥微,吴淑杰,张文祥*(),刘钢*()   

  • 收稿日期:2016-05-23 发布日期:2016-09-30
  • 通讯作者: 张文祥,刘钢 E-mail:zhwenx@mail.jlu.edu.cn;lgang@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(21473073,21473074);吉林省教育厅“十三五”科学技术研究项目(2016403)

Influence of the Surface Properties of Mesoporous Carbon on the Adsorption Removal of Ammonia under Low Concentration Conditions

Chun-Yang LI,Long-Long GENG,Xu-Wei YANG,Shu-Jie WU,Wen-Xiang ZHANG*(),Gang LIU*()   

  • Received:2016-05-23 Published:2016-09-30
  • Contact: Wen-Xiang ZHANG,Gang LIU E-mail:zhwenx@mail.jlu.edu.cn;lgang@jlu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21473073,21473074);“13th Five-Year”Science and Technology Research of the Education Department of Jilin Province, China(2016403)

摘要:

室内环境中低浓度氨污染普遍存在,影响人的身体健康,而消除这些低浓度的氨相对困难。本文报道了一种适用于低浓度氨吸附去除的介孔炭材料,其性能明显优于经硝酸处理的活性炭材料。该介孔炭采用磷酸铝为硬模板制备,炭表面存在大量含氧官能团,研究显示炭表面羧基和内酯基在吸附氨过程中发挥着重要作用,它们作为酸性中心与氨发生化学作用,可以有效地捕获空气中低浓度的氨污染物。

关键词: 介孔炭, 表面官能团, 吸附, 空气净化, 氨污染物

Abstract:

Low concentration ammonia is a widespread indoor air contaminant, which represents a considerable hazard to human health. The removal of ammonia can be difficult, especially when it is present at very low concentrations. In this study, we developed a new kind of mesoporous carbon with a high capacity for removing ammonia by adsorption. The ammonia-removing performance of this mesoporous carbon material was much better than that of activated carbon treated with nitric acid. The mesoporous carbon was prepared using aluminum phosphate as a hard template and contained a large number of oxygen-containing functional groups on its surface. The characterization results showed that the surface carboxyl and lactone groups play an important role in the adsorption of ammonia. For example, these groups could act as acidic sites capable of reacting with ammonia, and could therefore be responsible for the high capacity of mesoporous carbon to remove low ammonia contaminants under low concentration conditions.

Key words: Mesoporous carbon, Surface functional group, Adsorption, Air cleaning, Ammonia contaminant

MSC2000: 

  • O647