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Colloid and Polymer Science

, Volume 296, Issue 9, pp 1409–1417 | Cite as

Indirect fabrication of Ag nanoparticle-immobilized hollow silica composite particles and their catalysis

  • Jianing Wang
  • Yan Zheng
  • Wanyi Chen
  • Zhaoqun Wang
Original Contribution
  • 92 Downloads

Abstract

A simple and effective method is proposed to prepare Ag nanoparticle-immobilized hollow silica particles (SiO2HP/AgNP composite particles). Ag2O nanoparticles are first immobilized on hollow silica particles (SiO2HP) by in situ thermolysis of AgNO3 to get SiO2HP/Ag2ONP composite particles. Then, the Ag2ONPs immobilized on SiO2HP are translated to AgNPs by chemical or thermal reduction to obtain SiO2HP/AgNP composite particles. The resultant AgNPs have ultrafine nano-size and uniform and dense distribution, which benefits from the slow and moderate reaction in the formation of Ag2ONPs. The influencing factors including the surface property of SiO2HP, mass proportion of silver salt to silica, and reaction temperature have been studied. The composite particles exhibit excellent catalytic efficiency and repeatability in 4-nitrophenol reduction. Moreover, the catalytic activity can be further enhanced by adding a trace amount of NH3 into the system, which has obvious synergies for catalysis with AgNPs.

Keywords

Silver nanoparticles Hollow silica particles Precious metal catalysis 

Notes

Funding information

This work was supported by Program for Changjiang Scholars and Innovative Research Team in University (IRT1252) and the Fundamental Research Funds for the Central Universities.

Compliance with ethical standards

This work complies with ethical standard.

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

396_2018_4353_MOESM1_ESM.docx (234 kb)
ESM 1 (DOCX 233 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jianing Wang
    • 1
  • Yan Zheng
    • 1
  • Wanyi Chen
    • 1
  • Zhaoqun Wang
    • 1
  1. 1.Department of Polymer Science and Engineering, Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, School of Chemistry and Chemical EngineeringNanjing UniversityNanjingPeople’s Republic of China

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