Synthesis and H2S gas sensing properties of cage-like α-MoO3/ZnO composite

alpha-MoO3/ZnO composite with a novel cage-like morphology, composed of nanosheets with a thickness of about 25 nm, was synthesized via a hydrothermal method. The cage-like composite was of porous characteristics with a pore size distribution from 4 to 174 nm. The Brunauer-Emmett-Teller (BET) surface area of the cage-like composite was 58.22 m(2)/g, which was great higher than that of alpha-MoO3 nanorods (8.94 m(2)/g). The special structural characteristic of the composite resulted in its excellent H2S sensing properties including very high sensor response, low working temperature and good selectivity. (C) 2012 Elsevier B.V. All rights reserved.