Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity

Fei Zhao; Li Li; Yu-chuan Tian; Jian-jia Liu; Jian-jun Wang; Zhi-ming Zhou; Chun-xiang Lv; Xu-hong Guo

doi:10.1007/s10118-015-1700-5

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Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity

PAPER | Updated：2021-06-21

- Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity
- Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity
- Chinese Journal of Polymer Science 2015年33卷第10期页码：1421-1430
- Affiliations：
  
  a.School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  b.National Engineering Laboratory for Carbon Fiber Technology, Taiyuan 030001, China
  c.Key Laboratory of Xinjiang Uygur Autonomous Region and Engineering Research Center of Xinjiang Bingtuan of Materials-oriented Chemical Engineering, Shihezi University, Shihezi 832000, China
- Author bio：
  
  **Li Li (李莉), E-mail: lili76131@ecust.edu.cn
  Chun-xiang Lv (吕春祥), E-mail: lucx@sxicc.ac.cn
- Funds：
  
  National Natural Science Foundation of China(51273063;51003028);Fundamental Research Funds for the Central Universities and the High School Specialized Research Fund for the Doctoral Program(20110074110003);Fundamental Research Funds for the Central Universities and Research Program of Introducing Talents of Discipline of University(B08021)
- DOI：10.1007/s10118-015-1700-5
  中图分类号：
- 收稿：2015-03-19，
  
  修回：2015-05-19，
  
  录用：2015-05-24，
  
  纸质出版：2015-10
- Accepted：
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Fei Zhao, Li Li, Yu-chuan Tian, 等. Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity[J]. Chinese Journal of Polymer Science, 2015,33(10):1421-1430.

Fei Zhao, Li Li, Yu-chuan Tian, et al. Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity[J]. Chinese Journal of Polymer Science, 2015, 33(10): 1421-1430. DOI: 10.1007/s10118-015-1700-5.
Fei Zhao, Li Li, Yu-chuan Tian, 等. Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity[J]. Chinese Journal of Polymer Science, 2015,33(10):1421-1430. DOI： 10.1007/s10118-015-1700-5.

Fei Zhao, Li Li, Yu-chuan Tian, et al. Preparation of Au/Ag Multilayers via Layer-by-Layer Self-assembly in Spherical Polyelectrolyte Brushes and Their Catalytic Activity[J]. Chinese Journal of Polymer Science, 2015, 33(10): 1421-1430. DOI: 10.1007/s10118-015-1700-5. DOI：

摘要

Abstract

Spherical polyelectrolyte brushes (SPBs) consisting of polystyrene (PS) core and poly(2-aminoethyl methacrylate hydrochloride) (PAEMH) shell were prepared by photo-emulsion polymerization. Au nanoparticles (Au-NPs) with controlled size and size distribution were synthesized

in situ

using SPBs as nanoreactors.

Via

layer-by-layer deposition technique on the surface of SPBs

nano-composite particles with Au/Ag-NPs bilayer and Au/Ag/Au-NPs trilayer were prepared. The structures of the as-prepared Au/Ag multilayer SPBs were characterized by UV-Vis spectroscopy

TEM

ICP-AES and DLS. The charge reversal of the nano-composite particles observed by zeta potential confirmed the success of layer-by-layer assembly. The Au/Ag-NPs bilayer nano-composite particles showed high catalytic efficiency with an apparent activation energy of about 41.2 kJ/mol in the reduction reaction of 4-nitrophenol to 4-aminophenol in the existence of sodium borohydride monitored. The catalytic activity of Au/Ag-NPs multilayer SPBs close to that of Au-NPs SPBs and much higher than that of Ag-NPs SPBs reveals its potential applications in cost-effective catalysts with high-performance.

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