• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Ultralight aerogel based on molecular-modified poly(m-phenylenediamine) crosslinking with polyvinyl alcohol/graphene oxide for flow adsorption
【24h】

Ultralight aerogel based on molecular-modified poly(m-phenylenediamine) crosslinking with polyvinyl alcohol/graphene oxide for flow adsorption

机译：基于分子改性的聚间苯二胺与聚乙烯醇/氧化石墨烯交联的超轻气凝胶，用于流动吸附

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Poly( m -phenylenediamine) is an excellent adsorbent material. Nevertheless, it is difficult to recover and can even generate secondary pollution due to its powder-like form. Aerogels, monolithic three-dimensional structured materials, that are ultralight and have porous properties are efficient at adsorbing contaminants from water and can solve these problems. Here, we synthesized an aerogel based on molecular-modified poly( m -phenylenediamine) (mPmPD) crosslinking with polyvinyl alcohol (PVA) and graphene oxide (GO) (GO/mPmPD/PVA). Of note is that 3-aminophenylboronic acid was introduced into the polymer structure to induce a crosslinking reaction between boric acid units and PVA to constrain poly( m -phenylenediamine) in the aerogel. The GO/mPmPD/PVA aerogel shows stable mechanical properties in aqueous solution and an effective adsorption capacity for Ag( I ); the maximum Ag( I ) adsorption capacity is 917.41 mg g ~(?1) . The mechanism of Ag( I ) adsorption and reduction was clarified in that Ag( I ) chelated with imine units, and a redox reaction occured between Ag( I ) and the benzenoid amine units. Furthermore, the GO/mPmPD/PVA aerogel also shows excellent adsorption ability toward methyl orange and Congo red dyes. This GO/mPmPD/PVA aerogel shows enormous potential for application to silver recovery and dye removal due to its low cost, effective adsorption capacity and facile separation with aqueous solution.
机译：聚（间苯二胺）是一种极好的吸附材料。然而，由于其粉末状形式，很难回收，甚至可能产生二次污染。气凝胶是一种超轻且具有多孔特性的整体式三维结构材料，可有效地吸收水中的污染物，并可以解决这些问题。在这里，我们合成了一种基于分子改性的聚（间苯二胺）（mPmPD）与聚乙烯醇（PVA）和氧化石墨烯（GO）（GO / mPmPD / PVA）交联的气凝胶。值得注意的是，将3-氨基苯基硼酸引入到聚合物结构中以引起硼酸单元和PVA之间的交联反应，从而限制了气凝胶中的聚（间苯二胺）。 GO / mPmPD / PVA气凝胶在水溶液中表现出稳定的机械性能，并具有对Ag（I）的有效吸附能力;最大的Ag（I）吸附容量为917.41 mg g〜（？1）。 Ag（I）吸附和还原的机理得以阐明，因为Ag（I）与亚胺单元螯合，并且Ag（I）与苯甲胺单元之间发生了氧化还原反应。此外，GO / mPmPD / PVA气凝胶对甲基橙和刚果红染料也显示出优异的吸附能力。这种GO / mPmPD / PVA气凝胶因其低成本，有效的吸附能力和与水溶液的简便分离而具有巨大的潜力，可用于银的回收和染料的去除。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号