Controlling the Particle Size of Calcined Sn02 Nanocrystals

Guangsheng Pang, Siguang Chen, Yuri Koltypin, Arie Zaban, Shouhua Feng, Aharon Gedanken

Research output: Contribution to journalArticlepeer-review

148 Scopus citations

Abstract

Smaller SnO2 nanocrystals are prepared by a novel method. In this method, hydrous tin oxide nanoparticles are precipitated by dropping ammonium hydroxide into tin salt solution under sonication. Further calcination is conducted after the hydrous tin oxide nanoparticles are adsorbed onto the surface of SrCO3 nanoparticles. Calcination at 600°C yields SnO2 particles with an average particle size of 3.5 nm. This compares with 5.9 nm for the sample prepared by the conventional method. The band gap of SnO2 nanocrystals increases from 3.65 eV with a particle size 5.9 nm to 3.97 eV with a particle size 3.5 nm.

Original languageEnglish
Pages (from-to)723-726
Number of pages4
JournalNano Letters
Volume1
Issue number12
DOIs
StatePublished - Dec 2001

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