• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Breaking Polymer Chains with Self-Propel led Light-Controlled Navigable Hematite Microrobots
【24h】

Breaking Polymer Chains with Self-Propel led Light-Controlled Navigable Hematite Microrobots

机译：用自我推进的LED轻控制的可通航赤铁矿微米脱离聚合物链

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

The increasing use of polymers has led to an uncontrollable accumulation of polymer waste in the environment, evidencing the urgent need for effective and definitive strategies to degrade them. Here, self-propelled light-powered magnetic field-navigable hematite/metal Janus microrobots that can actively move, capture, and degrade polymers are presented. Janus microrobots are fabricated by asymmetrically depositing different metals on hematite microspheres prepared by low-cost and large-scale chemical synthesis. All microrobots exhibit fuel-free motion capability, with light-controlled on/off switching of motion and magnetic field-controlled directionality. Higher speeds are observed for bimetallic coatings with respect to single metals. This is due to their larger mixed potential difference with hematite as indicated by Tafel measurements. As a model for polymers, the total degradation of high molecular weight polyethylene glycol is demonstrated by matrix-assisted laser desorption/ionization mass spectrometry. This result is attributed to the active motion of microrobots, enhanced electrostatic capture of polymer chains, improved charge separation at the hematite/metal interface, and catalyzed photo-Fenton reaction. This work opens the route toward the degradation of polymers and plastics in water using light.
机译：越来越多的聚合物的使用导致了环境中的不可控制的聚合物废物积聚，证明了迫切需要有效和明确的策略来降低它们。在这里，呈现自动推进的光源磁场 - 可通航赤铁矿/金属Janus MicroObots，其可以主动移动，捕获和降解聚合物。 Janus Microorobots通过低成本和大规模化学合成制备的赤铁矿微球在赤铁矿微球上不对称地沉积不同的金属来制造。所有MicroObots都表现出无燃料的运动能力，光控制的开/关磁场和磁场控制方向性。对于单个金属，对双金属涂层观察到更高的速度。这是由于Tafel测量所示的与赤铁矿较大的混合势差。作为聚合物的模型，通过基质辅助激光解吸/电离质谱法证明了高分子量聚乙二醇的总劣化。该结果归因于微吸管的主动运动，增强聚合物链的静电捕获，在赤铁矿/金属界面处改善电荷分离，以及催化的光芬反应。这项工作采用光线打开了朝向水中聚合物和塑料的降解的途径。

著录项

  • 来源
    《Advanced Functional Materials》 |2021年第28期|2101510.1-2101510.10|共10页
  • 作者

    Urso Mario; Ussia Martina; Pumera Martin;

  • 作者单位

    Brno Univ Technol Future Energy & Innovat Lab Cent European Inst Technol Purkynova 656-123 Brno 61200 Czech Republic;

    Brno Univ Technol Future Energy & Innovat Lab Cent European Inst Technol Purkynova 656-123 Brno 61200 Czech Republic;

    Brno Univ Technol Future Energy & Innovat Lab Cent European Inst Technol Purkynova 656-123 Brno 61200 Czech Republic|Mendel Univ Brno Dept Chem & Biochem Ctr Nanorobot & Machine Intelligence Zemedelska 1 CZ-61300 Brno Czech Republic|Yonsei Univ Dept Chem & Biomol Engn 50 Yonseiro Seoul 03722 South Korea|China Med Univ China Med Univ Hosp Dept Med Res 91 Hsueh Shih Rd Taichung 40402 Taiwan;

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

    iron oxides; micromotors; photocatalysis; plastics; pollutants; polymers; water purification;

    机译：氧化铁;微量运动器;光催化;塑料;污染物;聚合物;水净化;

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