核壳结构锰氧化物/活性炭复合材料对室内甲醛的去除性能研究

摘要

针对室内空气中低浓度的甲醛污染,采用原位氧化还原法在室温下制备了活性炭负载的锰氧化物材料(MnO_x/AC),该复合材料对0.1 mg/m³甲醛污染气体的净化能力约为未负载活性炭的4.5倍;而且该材料失活后在室温下放置7 h后,其去除甲醛的活性可自行恢复,可以多次重复使用。相对湿度升高降低该复合材料的净化性能,而在较高温度下(60 ℃)表现出稳定的甲醛去除性能。

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关键词：甲醛；颗粒活性炭；锰氧化物；室内空气；复合材料

Abstract：

To deal with indoor pollution caused by low-level formaldehyde, manganese oxides supported on granular activated carbon (MnO_x/AC) were prepared by in-situ reduction of permanganate with AC at room temperature. The composite MnO_x/AC material showed much higher capability to remove formaldehyde, about 4.5 times higher than that of uncoated granular activated carbon. Moreover, the deactivated MnO_x/AC can be self-regenerated after it was kept at room temperature for 7 h, and can be repeatedly used. The increased relative humidity would decrease the purification capability of MnO_x/AC. However, it showed stable catalytic activity for formaldehyde removal at 60 ℃.

Keywords： formaldehyde； granular activated carbon； manganese oxide； indoor air； composite material

Received 2015-03-30;

Corresponding Authors: 张彭义,E-mail:zpy@tsinghua.edu.cn。 Email: zpy@tsinghua.edu.cn

About author: 热孜万古丽·玉努斯(1970),女,研究方向为室内空气净化。

引用本文:

热孜万古丽·玉努斯, 李金格, 张彭义, 王鸣晓.核壳结构锰氧化物/活性炭复合材料对室内甲醛的去除性能研究[J]. 化学工业与工程, 2015,32(3): 74-78

Yunus Rizwangul, Li Jinge, Zhang Pengyi, Wang Mingxiao.Performance of Core-Shell Manganese Oxides/Granular Activated Carbon Composite Materials for Indoor Formaldehyde Removal[J]. Chemcial Industry and Engineering, 2015,32(3): 74-78

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