For the reduction of 4-nitrophenol to 4-aminophenol, gold nanoparticles (AuNPs) below 10 nm have high catalytic activity. However, AuNPs in aqueous solution or organic solvents are not stable in the absence of stabilizers. Here, we describe polyion complex (PIC) micelles as the stabilizer to prepare highly dispersed AuNPs for the first time. The preparation route is very gentle, easy, and reproducible. PIC micelles-stabilized AuNPs are approximately 8 nm in size and exhibit high catalytic activity for the reduction of 4-nitrophenol. The kinetic reaction rate constant is 0.51 min−1 with a good linear relationship. On the basis of their excellent colloidal stability and catalytic activity, PIC micelles-stabilized AuNPs are greatly hoped for further applications in catalysis.

中文翻译：

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聚离子复合胶束稳定金纳米粒子催化还原 4-硝基苯酚

对于将 4-硝基苯酚还原为 4-氨基苯酚，10 nm 以下的金纳米粒子 (AuNPs) 具有很高的催化活性。然而，在没有稳定剂的情况下，水溶液或有机溶剂中的 AuNPs 是不稳定的。在这里，我们将聚离子复合物 (PIC) 胶束描述为首次制备高度分散的 AuNPs 的稳定剂。制备途径非常温和、简单且可重复。PIC 胶束稳定的 AuNP 的大小约为 8 nm，对还原 4-硝基苯酚表现出很高的催化活性。动力学反应速率常数为 0.51 min-1，具有良好的线性关系。基于其优异的胶体稳定性和催化活性，PIC胶束稳定的AuNPs有望在催化方面进一步应用。