...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Probing the Adsorption Characteristic of Metal-Organic Framework MIL-101 for Volatile Organic Compounds by Quartz Crystal Microbalance
【24h】

Probing the Adsorption Characteristic of Metal-Organic Framework MIL-101 for Volatile Organic Compounds by Quartz Crystal Microbalance

机译：石英晶体微量天平探究金属有机骨架MIL-101对挥发性有机化合物的吸附特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

As volatile organic compounds (VOCs) are a major group of air pollutants, development of materials for efficient adsorption and removal ofVOCs is of great significance in both environmental and analytical sciences. Here we report metal-organic frameworks (MOFs) MIL-101 for the effective adsorption of VOCs at atmospheric pressure. A simple device was designed for quartz crystal microbalance (QCM), and six VOCs with various functional groups and polarities, i.e., H-hexane, toluene, methanol, butanone, dichloromethane, and tt-butylamine, were chosen as targets to probe the adsorption properties of MIL-101. The developed device allows measure- ment of the adsorption isotherms and monitoring of die dynamic process for the adsorption of VOCs on MOFs, and also provides a useful tool for characterization of MOFs. The adsorption isotherms of the VOCs on MIL-101 followed the Dubinin-Astakhov equation with the characteristic energy from 5.70 (methanol) to 9.13 kj moP1 (n-butylamine), Astakhov exponent from 0.50 (n-butylamine) to 3.03 (n-hexane), and the limiting adsorption capacity from 0.08 (n-hexane) to 12.8 (n-butylamine) mmol g~ MIL-101 exhibited the strongest affinity to n-butylamine, but the weakest affinity to n-hexane. The determined Astakhov exponents and the isosteric heats of adsorption revealed the energetic heterogeneity of MIL-101. MIL-101 showed the most energetically homogeneous for n-hexane, but the most energetically heterogeneous for M-butylamine. The dynamic process of adsorption monitored by the QCM system demonstrated the distribution of the sorption sites within MIL-101. The metal sites within the MIL-101 were vital in adsorption process. MIL-101 gave much higher affinity and bigger adsorption capacity to VOCs than activated carbon, offering great potential for real applications in the adsorption and removal of VOCs.
机译：由于挥发性有机化合物（VOC）是主要的空气污染物，因此开发有效吸附和去除VOC的材料在环境和分析科学中都具有重要意义。在这里，我们报告了金属-有机骨架（MIL-101），用于在大气压下有效吸附VOC。设计了一种用于石英晶体微量天平（QCM）的简单装置，并选择了六种具有各种官能团和极性的VOC，即正己烷，甲苯，甲醇，丁酮，二氯甲烷和叔丁胺作为探测吸附的目标。 MIL-101的特性。开发的设备可以测量吸附等温线，并监测MOF上VOC的吸附过程，同时还提供了表征MOF的有用工具。 VOC在MIL-101上的吸附等温线遵循Dubinin-Astakhov方程，其特征能量为5.70（甲醇）至9.13 kj moP1（正丁胺），Astakhov指数为0.50（正丁胺）至3.03（正己烷） ），从0.08（正己烷）至12.8（正丁胺）mmol g〜MIL-101的极限吸附容量显示出对正丁胺的最强亲和力，但对正己烷的最弱亲和力。确定的Astakhov指数和等规吸附热揭示了MIL-101的高能异质性。 MIL-101在正己烷中显示出最大的能量均质性，但在M-丁胺中显示出最大的能量异质性。通过QCM系统监测的动态吸附过程证明了MIL-101内吸附位的分布。 MIL-101中的金属位点在吸附过程中至关重要。与活性炭相比，MIL-101对挥发性有机化合物具有更高的亲和力和更大的吸附能力，为实际应用中的挥发性有机化合物的吸附和去除提供了巨大的潜力。

著录项

  • 来源
    《Environmental Science & Technology》 |2011年第10期|p.4490-4496|共7页
  • 作者

    Chan-Yuan Huang; Ming Song; Zhi-Yuan Gu; He-Fang Wang; Xiu-Ping Yan;

  • 作者单位

    Research Center for Analytical Sciences, and Key Laboratory of Functional Polymer Materials, Ministry of Education,College of Chemistry, Nankai University, Tianjin 300071, China;

    Research Center for Analytical Sciences, and Key Laboratory of Functional Polymer Materials, Ministry of Education,College of Chemistry, Nankai University, Tianjin 300071, China;

    Research Center for Analytical Sciences, and Key Laboratory of Functional Polymer Materials, Ministry of Education,College of Chemistry, Nankai University, Tianjin 300071, China;

    Research Center for Analytical Sciences, and Key Laboratory of Functional Polymer Materials, Ministry of Education,College of Chemistry, Nankai University, Tianjin 300071, China;

    Research Center for Analytical Sciences, and Key Laboratory of Functional Polymer Materials, Ministry of Education,College of Chemistry, Nankai University, Tianjin 300071, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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