Sonochemical synthesis of networked silica shell with reduced microporosity on titania nanocores for photocatalytic activity reduction

Ahmed Mohamed El-Toni, Shu Yin, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Silica shells with a high density of networks and reduced microporosity has been formed on titania nanocores via a sonochemical approach in the absence of ammonia as a hydrolyzing catalyst. The TiO2-silica core-shell nanoparticles were characterized by transmission electron microscopy, energy-dispersive X-ray analysis, Fourier transform infrared spectroscopy (FTIR), and microporosity measurements. The photocatalytic activity of coated titania was also reported. FTIR measurements showed that the silica shell was formed with a high density of networks through the formation of asymmetric Si-O-Si vibration and asymmetric Si-O-Si stretching vibration bonds. Moreover, the thickness and microporosity of the silica shell could be altered by controlling the sonochemical power and time parameters.

Original languageEnglish
Pages (from-to)3125-3128
Number of pages4
JournalJournal of the American Ceramic Society
Volume92
Issue number12
DOIs
Publication statusPublished - 2009 Dec

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