Chem. J. Chinese Universities ›› 2016, Vol. 37 ›› Issue (8): 1509.doi: 10.7503/cjcu20160084

• Physical Chemistry • Previous Articles     Next Articles

Synthesis of the Supported Au Polystyrene/poly(acrylic acid) Composite Microspheres and Their pH Regulated Performance

TENG Xiaobo, ZHANG Chunxia, ZHANG Ying*()   

  1. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
  • Received:2016-01-30 Online:2016-07-13 Published:2016-07-13
  • Contact: ZHANG Ying E-mail:zhangy@snnu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21173141), the Key Industry Project of Shaanxi Province of China(No.2011K08-14) and the Changjiang Scholars and Innovative Research Team in University of China(No.IRT-14R33)

Abstract:

The core-shell polystyrene(PS)/poly(acrylic acid)(PAA) composite microgels with pH sensitivity were synthesized via two-step polymerization method. Au nanoparticles were supported onto pH sensitivity composite microgels via in situ reduction of chloroauric acid(HAuCl4) using NaBH4 as reduction agent and sodium citrate as stabilizer. The results demonstrated that the plasmonic coupling of gold nanoparticles could be regulated, and the diffusion of reactive substrates availably controlled, due to the shrinkage and swelling performance of the shell chains under the different acid and alkali conditions. The optical property and catalytic activity of Au NPs could be regulated by changing the micro-environment of composite microgels. Therefore, the performance of composite materials could be realized the pH-controllable.

Key words: Polymer microgel, pH sensitivity, Au nanoparticle, Localized surface plasmon resonance(LSPR), Supported catalyst

CLC Number: 

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