高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (4): 20220636.doi: 10.7503/cjcu20220636

• 物理化学 • 上一篇    下一篇

表面覆盖型AuNPs@PNIPAM复合粒子的制备及催化性能

闫雨甜, 吴思, 常康康, 夏宇正, 陈晓农, 石淑先()   

  1. 北京化工大学材料科学与工程学院, 北京 100029
  • 收稿日期:2022-09-24 出版日期:2023-04-10 发布日期:2022-12-02
  • 通讯作者: 石淑先 E-mail:shisx@mail.buct.edu.cn
  • 基金资助:
    北京化工大学-中日友好医院生物医学转化工程研究中心联合项目(XK2020-13)

Preparation and Catalytic Performance of Surface-covered AuNPs@PNIPAM Composite Particles

YAN Yutian, WU Si, CHANG Kangkang, XIA Yuzheng, CHEN Xiaonong, SHI Shuxian()   

  1. College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China
  • Received:2022-09-24 Online:2023-04-10 Published:2022-12-02
  • Contact: SHI Shuxian E-mail:shisx@mail.buct.edu.cn
  • Supported by:
    the Joint Project of Biomedical Translational Engineering Research Center of BUCT-CJFH(BRC-BC), China(XK2020-13)

摘要:

金纳米粒子(AuNPs)表面能高, 在水中极易团聚, 使其应用受限. 本文采用物理共混法, 将带有正电荷的温敏聚(N-异丙基丙烯酰胺)(PNIPAM)微凝胶与带负电荷的AuNPs混合, 经自组装制备了微凝胶表面覆盖AuNPs的有机-金属复合粒子AuNPs@PNIPAM. 该复合粒子不仅具有很好的分散稳定性, 而且其粒子的分散液具有温度比色性, 在25 ℃→50 ℃→25 ℃的温度变化过程中呈现“红→紫→红”的可逆颜色变化. 通过对硝基苯酚(4-NP)的还原反应, 研究了复合粒子的催化性能. 结果表明, 复合粒子具有受温度调控的催化能力, 随温度升高催化性能呈现先降后升的趋势. 与文献报道的类似材料相比, AuNPs@PNIPAM复合粒子同时具有温度比色性和催化性能.

关键词: 聚(N-异丙基丙烯酰胺)微凝胶, 金纳米粒子, 温度响应性, 催化性能

Abstract:

Gold nanoparticles(AuNPs) with high surface energy are easy to agglomerate in water, which restricts their applications. In this study, poly(N-isopropyl acrylamide)(PNIPAM) microgel and AuNPs were combined by electrostatic interaction through physical blending method inorder to cause negative citrate-stabilized AuNPs absorbed on the surface of positive PNIPAM microgels. The prepared surface-covered AuNPs@PNIPAM particles not only have excellent dispersion stability, but also exhibit a temperature-dependent colorimetric property, showing a reversible change of “red→purple→red” during the temperature change of 25 ℃→50 ℃→25 ℃. In addition, the p-nitrophenol(4-NP) reduction reaction was used as the simulated catalytic reaction to examine the catalytic performance of AuNPs@PNIPAM. The results showed that the catalytic performance of AuNPs@PNIPAM first decreased and then increased with temperature. Compared to similar materials reported in the literature, the AuNPs@PNIPAM showed both temperature-colorimetric properties and catalytic performance.

Key words: Poly(N-isopropyl acrylamide) microgel, Gold nanopartiocles, Thermo-responsive property, Catalytic performance

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