A novel type of multicomponent nanocomposite of LDH@PDA@PNIPAM@Pd/carbon dots (CDs) was successfully constructed for highly efficient heterogeneous catalytic reduction from two-dimensional layer double hydroxide (LDH) nanosheet functionalized with thermo-responsive PNIPAM polymer brushes based on the mussel-inspired chemistry. CDs were used as a reductant and stabilizer by in situ loading metal Pd onto LDH@PDA@PNIPAM. Compared with LDH@PDA@PNIPAM@Pd catalyst without CDs modification, the designed LDH@PDA@PNIPAM@Pd/CDs nanohybrid catalyst had better catalytic reduction ability for various dyes and nitrophenol thanks to the synergistic catalytic effect between metal active center and CDs, LDH and their high dispersion stability. Especially, a good catalytic reduction activity was demonstrated for methylene blue (MB) with a high TOF (545.2 min⁻¹). Furthermore, the nanohybrid presented interesting thermo-responsive catalytic property due to the existence of PNIPAM polymer chains. In addition, the prepared catalyst also exhibited outstanding catalytic property for the Knoevenagel condensation reaction. Our study provides a new way for the composite preparation of organic-inorganic hybrid materials by polymer and inorganic materials, and shows great potential in the field of catalytic applications.

成功构建了一种新型的LDH @ PDA @ PNIPAM @ Pd /碳点（CD）的多组分纳米复合材料，用于高效热异构化从二维层状双氢氧化物（LDH）纳米片材中，该纳米片材基于热响应性PNIPAM聚合物刷进行功能化，贻贝启发的化学。通过将金属Pd原位装载到LDH @ PDA @ PNIPAM上，CD用作还原剂和稳定剂。与没有CD修饰的LDH @ PDA @ PNIPAM @ Pd催化剂相比，设计的LDH @ PDA @ PNIPAM @ Pd / CDs纳米杂化催化剂由于金属活性中心与CD的协同催化作用，对各种染料和硝基苯酚的催化还原能力更好， LDH及其高分散稳定性。特别是，TOF高（545.2分钟）的亚甲基蓝（MB）被证明具有良好的催化还原活性。^-1）。此外，由于PNIPAM聚合物链的存在，纳米杂化物表现出有趣的热响应催化性能。此外，制得的催化剂还显示出对Knoevenagel缩合反应的优异催化性能。本研究为聚合物和无机材料复合制备有机-无机杂化材料提供了新途径，并在催化应用领域显示出巨大的潜力。