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首页> 外文期刊>Aerosol and Air Quality Research >High-Performance Amino-Functional Graphene/CNT Aerogel Adsorbent for Formaldehyde Removal from Indoor Air
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High-Performance Amino-Functional Graphene/CNT Aerogel Adsorbent for Formaldehyde Removal from Indoor Air

机译：高性能氨基功能石墨烯/ CNT气凝胶吸附剂，可去除室内空气中的甲醛

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A flexible approach prepares amino-functional graphene aerogels with different additions of carbon nanotubes (CNTs) for use as an adsorbent to study the adsorption performance of formaldehyde in indoor air. Experimental results indicated that the decoration of amino groups offers a greater number of chemical adsorption sites, which mainly contributed to the improvement of the chemical adsorption capacity of graphene aerogels, and the breakthrough time increased from 0 to 390 min g–1 under 3.7 ppm of formaldehyde. The addition of CNTs can significantly enhance the adsorption properties. More interestingly, the breakthrough time presents a substantial increase from 390 to 20,300 min g–1 when the mass ratio of CNTs and graphene increased from 0:1 to 2:1 and then decreased to 18,000 min g–1 at the ratio of 3:1. The addition of CNTs weakens the agglomeration degree and achieves a greater number of adsorption sites by playing a supportive and connective role among graphene sheets. However, more CNTs will agglomerate, and fewer functional groups on the surface limit additional amounts. The adsorption mechanism was also studied by analyzing the surface specific area and N content. This work provides new insights into the application of amino-functional graphene aerogels with the additions of CNTs (AGCAs) as a potential adsorbent to eliminate indoor formaldehyde pollution.
机译：一种灵活的方法可以制备具有不同添加量的碳纳米管（CNT）的氨基功能石墨烯气凝胶，以用作吸附剂，以研究甲醛在室内空气中的吸附性能。实验结果表明，氨基的修饰提供了更多的化学吸附位点，这主要有助于改善石墨烯气凝胶的化学吸附能力，在3.7 ppm的条件下，穿透时间从0增加到390 min g-1。甲醛。 CNT的添加可以显着增强吸附性能。更有趣的是，当CNT和石墨烯的质量比从0：1增加到2：1，然后以3：3的比例下降到18,000 min g-1时，突破时间从390增加到20,300 min g-1。 1。碳纳米管的添加通过在石墨烯片之间起支撑和连接作用，弱化了团聚程度并获得了更多的吸附位点。但是，更多的CNT会聚结，并且表面上的官能团更少，从而限制了额外的数量。还通过分析比表面积和氮含量研究了吸附机理。这项工作为氨基功能石墨烯气凝胶的应用提供了新的见解，并添加了碳纳米管（AGCA）作为消除室内甲醛污染的潜在吸附剂。

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