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首页> 外文期刊>ACS applied materials & interfaces >Smart Removal of Dye Pollutants via Dark Adsorption and Light Desorption at Recyclable Bi2O2CO3 Nanosheets Interface
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Smart Removal of Dye Pollutants via Dark Adsorption and Light Desorption at Recyclable Bi2O2CO3 Nanosheets Interface

机译：通过可回收的Bi2O2CO3纳米液界面通过深色吸附和光解吸智能去除染料污染物

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摘要

The adsorbents for water treatment and purification are commonly not recyclable because of the lack of a reagent-less "switch" to readily release the adsorbed compounds. Herein, the interface of Bi2O2CO3 (BOG) nanosheets is designed, synthesized, and modified with citric acid, namely, modified Bi2O2CO3 (m-BOC). The m-BOC is able to selectively adsorb methylene blue (MB) in the dark and the adsorbed MB could be released in the light from m-BOC without the addition of any chemicals. The adsorption mechanism is attributed to the electrostatic attraction between positively charged MB and the negatively charged surface of m-BOC. In contrast, the desorption of MB has resulted from the photo-induced charge redistribution on the surface of m-BOC, which unlocks the coordination bond between m-BOC and the carboxylic group. As a result, BOC is recycled. Such a mechanism was verified by both experimental investigation and DFT calculation. This work provides a promising interfacial engineering strategy for the remediation of dye-polluted water and smart separation in chemical engineering.
机译：用于水处理和纯化的吸附剂通常是由于缺乏试剂的“开关”而易于释放吸附的化合物。在此，用柠檬酸设计，合成和改性Bi2O2CO3（Bog）纳米片的界面，即改性Bi2O2CO3（M-Boc）。 M-BOC能够在黑暗中选择性地吸附亚甲基蓝（MB），并且可以在没有添加任何化学物质的M-Boc的光中释放吸附的MB。吸附机制归因于带正电荷的MB和M-Boc的带负电表面之间的静电吸引。相反，Mb的解吸引起了MB的光学诱导的电荷再分布，其在M-BOC的表面上解锁了M-BOC和羧基之间的配位键。结果，再循环BOC。通过实验研究和DFT计算验证了这种机制。这项工作为修复染料污染的水和化学工程智能分离提供了一个有前途的界面工程战略。

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  • 来源
    《ACS applied materials & interfaces》 |2020年第18期|共10页
  • 作者

    Liu Haijin; Chen Min; Wei Dandan; Ma Yaqiang; Wang Fengliang; Zhang Qianxin; Shi Jialu; Zhang Hui; Peng Jianbiao; Liu Guoguang; Zhang Shanqing;

  • 作者单位

    Henan Normal Univ Key Lab Yellow River &

    Huaihe River Water Environ Henan Key Lab Environm Pollut Control Sch Environ Minist Educ Int Joint Lab Key Tech Water Treatmen Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Key Lab Yellow River &

    Huaihe River Water Environ Henan Key Lab Environm Pollut Control Sch Environ Minist Educ Int Joint Lab Key Tech Water Treatmen Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Key Lab Yellow River &

    Huaihe River Water Environ Henan Key Lab Environm Pollut Control Sch Environ Minist Educ Int Joint Lab Key Tech Water Treatmen Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Key Lab Yellow River &

    Huaihe River Water Environ Henan Key Lab Environm Pollut Control Sch Environ Minist Educ Int Joint Lab Key Tech Water Treatmen Xinxiang 453007 Henan Peoples R China;

    Guangdong Univ Technol Fac Environm Sci &

    Engn Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Fac Environm Sci &

    Engn Guangzhou 510006 Peoples R China;

    Henan Normal Univ Key Lab Yellow River &

    Huaihe River Water Environ Henan Key Lab Environm Pollut Control Sch Environ Minist Educ Int Joint Lab Key Tech Water Treatmen Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Key Lab Yellow River &

    Huaihe River Water Environ Henan Key Lab Environm Pollut Control Sch Environ Minist Educ Int Joint Lab Key Tech Water Treatmen Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Key Lab Yellow River &

    Huaihe River Water Environ Henan Key Lab Environm Pollut Control Sch Environ Minist Educ Int Joint Lab Key Tech Water Treatmen Xinxiang 453007 Henan Peoples R China;

    Guangdong Univ Technol Fac Environm Sci &

    Engn Guangzhou 510006 Peoples R China;

    Griffith Univ Ctr Clean Environm &

    Energy Sch Environm &

    Sci Gold Coast Campus Nathan Qld 4222 Australia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    nanosheets; Bi2O2CO3; adsorption; light desorption; photo-induced; dyes;

    机译：Nanosheets;Bi2O2Co3;吸附;光解吸;光诱导;染料;

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