Dual-functional micro/nanomotors that can sensitively detect and rapidly degrade organic pollutants show great application prospects in the field of environmental remediation. Here we demonstrate the first proof-of-concept of a novel self-propelled nanomachine for simultaneous colorimetric detection and removal of aquatic pollutants based on the use of ascorbic acid-functionalized NiMn-CLDHs@HNTs-Ag (AA-NiMn-CLDHs@HNTs-Ag) nanomotors. The as-prepared nanomotors were assembled from NiMn-CLDH nanosheets with intrinsic oxidase/peroxidase-like activity and HNTs, revealing a unique 3D hierarchical architecture with more accessible reactive sites. Ag NPs were introduced into the lumen of halloysite nanotubes (HNTs) and acted as a catalyst for the decomposition of H₂O₂ to produce O₂ bubbles for the propulsion of nanomotors. Benefitting from the autonomous movement, 3D hierarchical morphology and robust peroxidase-like activity, AA-NiMn-CLDHs@HNTs could achieve selective and sensitive detection of phenol with a limit of detection of 0.225 μM as well as quick degradation of phenol via a Fenton-like reaction. This study provides a promising strategy for the synthesis of micro/nanomotors for simultaneous detection and removal of organic pollutants from aqueous samples.

中文翻译：

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使用 3D 分层 AA-NiMn-CLDHs@HNTs-Ag 纳米电机基于运动检测和降解苯酚

能够灵敏检测并快速降解有机污染物的双功能微纳米电机在环境修复领域具有广阔的应用前景。在这里，我们展示了基于使用抗坏血酸功能化的 NiMn-CLDHs@HNTs-Ag (AA-NiMn-CLDHs@HNTs) 的新型自走纳米机器的第一个概念验证，用于同时比色检测和去除水生污染物。 -Ag) 纳米马达。所制备的纳米马达由具有内在氧化酶/过氧化物酶样活性和 HNT 的 NiMn-CLDH 纳米片组装而成，揭示了一种独特的 3D 分层结构，具有更易接近的反应位点。Ag NPs 被引入到埃洛石纳米管 (HNTs) 的管腔中，并作为 H ₂ O ₂分解产生 O的催化剂_2个气泡用于推动纳米马达。得益于自主运动、3D分层形态和强大的类过氧化物酶活性，AA-NiMn-CLDHs@HNTs可以实现苯酚的选择性和灵敏检测，检测限为0.225 μM，并通过Fenton-喜欢反应。该研究为合成微/纳米电机以同时检测和去除水样中的有机污染物提供了一种有前景的策略。