Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 177, Issue 12, Pages 942-948Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2012.04.020
Keywords
ZnSnO3 nanoparticles; Cubic-like aggregates; Inorganic salt; Effect; Gas sensors
Funding
- National Natural Science Foundation of P.R. China [21071130]
- Outstanding Scholar Program of Henan Province, P.R. China
- start-up grant from State Laboratory of Surface and Interface Science and Technology (SLSIST)
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The effect of added solid inorganic salts on the morphology of ZnSnO3 nanoparticle aggregates has been investigated based on solventless and organic-free reactions at ambient temperature. Cubic-like aggregates of ZnSnO3 nanoparticles can be synthesized successfully through direct reaction of solid MOH (M+ = K+, Na+) with a solid mixture of ZnCl2 and SnCl4 center dot 5H(2)O in the presence of added inorganic salt, MCl (M+ = K+, Na+). In contrast, irregular spherical aggregates of ZnSnO3 nanoparticles are produced in the reactions in absence of added solid inorganic salts. The added solid inorganic salts, which play a key role for producing the cubic-like aggregates of ZnSnO3 nanoparticles with pores of ca. 2.8 nm, may act as a substrate-template for the growth of nanocrystals and the formation of their cubic-like aggregates. Gas sensors are further constructed with the aggregates of ZnSnO3 nanoparticles as sensing materials. The sensors made with the cubic-like aggregates (C-sensors) exhibit much higher responses to the reducing gases tested, compared to those (S-sensors) from spherical aggregates synthesized without adding inorganic substrate-template into the reaction. The approach could open a new pathway for controlling the microstructure of materials with high gas sensing functionality. (c) 2012 Elsevier B.V. All rights reserved.
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