Mesoporous SiO2 yolk shell confined core-satellite Ag nanoparticles: Preparation and catalytic activity

Ya Mao, Wanquan Jiang*, Sheng Wang, Mei Liu, Shouhu Xuan, Xinglong Gong, Ken C F LEUNG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

In this work, novel mesoporous SiO2 yolk-shell confined core-satellite Ag nanoparticles (Ag@mSiO2) synthesized with a simple route were reported. Firstly, the core/shell Ag@C nanospheres whose carbon shells were doped with Ag nanoparticles, were facilely prepared by using a simple hydrothermal method. After coating with a uniform layer of hybrid SiO2 in the presence of octadecyltrimethoxysilane (C18TMS), the Ag@C@h-SiO2 composite nanospheres were obtained. The final calcination removed all the carbon and organic compound and left the yolk shell Ag@mSiO2 nanosphere, in which an individually large Ag core and many tiny Ag nanoparticles were encapsulated within the mesoporous silica shell. The core-satellite like Ag nanoparticles exhibited excellent catalytic activity in RhB reduction. Benefited from the m-SiO2 shell with a uniform pore size of 3.5 nm, the bi-mode Ag nanoparticles were very stable, thus the activity of Ag@mSiO2 could keep as high as 92% after five cycles.

Original languageEnglish
Pages (from-to)406-414
Number of pages9
JournalJournal of Alloys and Compounds
Volume680
DOIs
Publication statusPublished - 25 Sep 2016

Scopus Subject Areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

User-Defined Keywords

  • Ag@mSiO
  • Catalysts
  • Mesoporous
  • Nanosphere
  • Recyclability
  • Yolk-shell

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