Size controlled Ag nanoparticles within pores of monolithic mesoporous silica by ultrasonic irradiation

Wei Chen, J. Zhang, Y. Di, Z. Wang, Q. Fang, W. Cai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Ag/SiO 2 monolithic mesoporous nanocomposite was prepared by a simple impregnation of the preformed monolithic porous host in silver nitrate aqueous solution followed by ultrasonic irradiation of the liquid-solid mixture at room temperature. The formation and size of the particle in porous host have been determined from high-resolution transmission electron microscope (HRTEM), UV-Vis absorption band, and transmission electronic microscopy (TEM) analyses. It is found, due to the pore size limitation of mesoporous solid, the metal particles incorporated in have smaller size and more narrow size distribution than those formed simultaneously in corresponding soaking solution, and are located in the pores less than 10nm in diameter. The proposed mechanism of noble metal nanoparticles formed within pores of mesoporous silica is discussed. It is assumed that the long-lived carriers of reducing power caused by the acoustic cavitation at the surface or near surface of porous monoliths is believed to play a major role in this pore doping processing. © 2003 Published by Elsevier Science B.V.
Original languageEnglish
Pages (from-to)280-284
Number of pages5
JournalApplied Surface Science
Volume211
Issue number1-4
DOIs
Publication statusPublished - 30 Apr 2003
Externally publishedYes

Keywords

  • Cavitation at the surface of porous monoliths
  • Mesoporous nanocomposite
  • Sonochemistry

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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