The urgent demand for addressing dye contaminants in water necessitates the development of microrobots that exhibit remote navigation, rapid removal, and molecular identification capabilities. The progress of microrobot development is currently hindered by the scarcity of multifunctional materials. In this study, a plasmonic MXene hydrogel (PM‐Gel) is synthesized by combining bimetallic nanocubes and Ti3C2Tx MXene through the rapid gelation of degradable alginate. The hydrogel can efficiently adsorb over 60% of dye contaminants within 2 min, ultimately achieving a removal rate of >90%. Meanwhile, the hydrogel exhibits excellent sensitivity in surface enhanced Raman scattering (SERS) detection, with a limit of detection (LOD) as low as 3.76 am. The properties of the plasmonic hydrogel can be further adjusted for various applications. As a proof‐of‐concept experiment, thermosensitive polymers and superparamagnetic particles are successfully integrated into this hydrogel to construct a versatile, light‐responsive microrobot for dye contaminants. With magnetic and optical actuation, the robot can remotely sample, identify, and remove pollutants in maze‐like channels. Moreover, light‐driven hydrophilic‐hydrophobic switch of the microrobots through photothermal effect can further enhance the adsorption capacity and reduced the dye residue by up to 58%. These findings indicate of a broad application potential in complex real‐world environments.

中文翻译：

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基于 MXene 水凝胶的多功能微型机器人，用于可控水污染管理

解决水中染料污染物的迫切需求需要开发具有远程导航、快速去除和分子识别功能的微型机器人。目前多功能材料的稀缺阻碍了微型机器人的发展。在这项研究中，通过结合双金属纳米立方体和钛合成了等离子体 MXene 水凝胶（PM-Gel）3C2时间XMXene 通过可降解海藻酸盐的快速凝胶化。该水凝胶可以在2分钟内有效吸附超过60%的染料污染物，最终实现>90%的去除率。同时，该水凝胶在表面增强拉曼散射（SERS）检测中表现出优异的灵敏度，检测限（LOD）低至3.76 a米。等离子体水凝胶的特性可以进一步调整以适应各种应用。作为概念验证实验，热敏聚合物和超顺磁性颗粒成功集成到这种水凝胶中，构建了一种用于处理染料污染物的多功能光响应微型机器人。通过磁和光驱动，机器人可以远程采样、识别和清除迷宫般通道中的污染物。此外，通过光热效应实现光驱动微型机器人的亲水-疏水转换可以进一步增强吸附能力，并将染料残留减少高达58%。这些发现表明在复杂的现实环境中具有广泛的应用潜力。