...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Tuning Pb(il) Adsorption from Aqueous Solutions on Ultrathin Iron Oxychloride (FeOCl) Nanosheets
【24h】

Tuning Pb(il) Adsorption from Aqueous Solutions on Ultrathin Iron Oxychloride (FeOCl) Nanosheets

机译：调节超薄氯氧化铁（FeOCl）纳米板上水溶液对Pb（il）的吸附

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

Structural tunability and surface functionality of layered two-dimensional (2-D) iron oxychloride (FeOCl) nanosheets are critical for attaining exceptional adsorption properties. In this study, we combine computational and experimental tools to elucidate the distinct adsorption nature of Pb(II) on 2-D FeOCl nanosheets. After finding promising Pb(II) adsorption characteristics by bulk FeOCl sheets (B-FeOCl), we applied computational quantum mechanical modeling to mechanistically explore Pb(II) adsorption on representative FeOCl facets. Results indicate that increasing the exposure of FeOCl oxygen and chlorine sites significantly enhances Pb(II) adsorption. The (110) and (010) facets of FeOCl possess distinct orientations of oxygen and chlorine, resulting in different Pb(II) adsorption energies. Consequently, the (110) facet was found to be more selective toward Pb(II) adsorption than the (010) facet. To exploit this insight, we exfoliated B-FeOCl to obtain ultrathin FeOCl nanosheets (U-FeOCl) possessing unique chlorine- and oxygen-enriched surfaces. As we surmised, U-FeOCl nanosheets achieved excellent Pb(II) adsorption capacity (709 mg g(-1) or 3.24 mmol g(-1)). Moreover, U-FeOCl demonstrated rapid adsorption kinetics, shortening adsorption equilibration time to one-third of the time for B-FeOCl. Extensive characterization of FeOCl-Pb adsorption complexes corroborated the simulation results, illustrating that increasing the number of Pb-O and Pb-Cl interaction sites led to the improved Pb(II) adsorption capacity of U-FeOCl.
机译：二维（2-D）氯氧化铁（FeOCl）纳米片的结构可调性和表面功能性对于获得优异的吸附性能至关重要。在这项研究中，我们结合计算和实验工具来阐明Pb（II）在二维FeOCl纳米片上的独特吸附性质。在通过块状FeOCl薄板（B-FeOCl）找到有希望的Pb（II）吸附特性后，我们应用了计算量子力学模型来机械地研究代表性FeOCl面上的Pb（II）吸附。结果表明，增加FeOCl的氧和氯位置的暴露量显着增强了Pb（II）的吸附。 FeOCl的（110）和（010）面具有不同的氧和氯取向，从而导致不同的Pb（II）吸附能。因此，发现（110）面比（010）面对Pb（II）的吸附更具选择性。为了利用这一见识，我们对B-FeOCl进行了剥落以获得具有独特的富含氯和氧的表面的超薄FeOCl纳米片（U-FeOCl）。正如我们推测的那样，U-FeOCl纳米片具有出色的Pb（II）吸附能力（709 mg g（-1）或3.24 mmol g（-1））。此外，U-FeOCl表现出快速的吸附动力学，将吸附平衡时间缩短至B-FeOCl的三分之一。 FeOCl-Pb吸附复合物的广泛表征证实了模拟结果，表明增加Pb-O和Pb-Cl相互作用位点的数量导致U-FeOCl的Pb（II）吸附能力提高。

著录项

  • 来源
    《Environmental Science & Technology》 |2019年第4期|2075-2085|共11页
  • 作者

    Luo Jinming; Sun Meng; Ritt Cody L.; Liu Xia; Pei Yong; Crittenden John C.; Elimelech Menachem;

  • 作者单位

    Georgia Inst Technol, Brook Byers Inst Sustainable Syst, 828 West Peachtree St, Atlanta, GA 30332 USA|Georgia Inst Technol, Sch Civil & Environm Engn, 828 West Peachtree St, Atlanta, GA 30332 USA;

    Yale Univ, Dept Chem & Environm Engn, New Haven, CT 06520 USA;

    Yale Univ, Dept Chem & Environm Engn, New Haven, CT 06520 USA;

    Xiangtan Univ, Dept Chem, Key Lab Green Organ Synth & Applicat Hunan Prov, Key Lab Environm Friendly Chem & Applicat,Minist, Xiangtan 411105, Hunan, Peoples R China;

    Xiangtan Univ, Dept Chem, Key Lab Green Organ Synth & Applicat Hunan Prov, Key Lab Environm Friendly Chem & Applicat,Minist, Xiangtan 411105, Hunan, Peoples R China;

    Georgia Inst Technol, Brook Byers Inst Sustainable Syst, 828 West Peachtree St, Atlanta, GA 30332 USA|Georgia Inst Technol, Sch Civil & Environm Engn, 828 West Peachtree St, Atlanta, GA 30332 USA;

    Yale Univ, Dept Chem & Environm Engn, New Haven, CT 06520 USA;

  • 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