A novel seawave-like hierarchical WO3 nanocomposite and its ammonia gas properties

In this work, a novel two-dimensional seawave-like hierarchical WO3 nanocomposite was synthesized by a one-step hydrothermal route. It was amazing that this novel two-dimensional WO3 nanostructure was composed of one-dimensional worm-like WO3 nanowires. Furthermore, a ultra-sensitivity towards ammonia was shown primarily attributed to abundant gas diffusion channels and large gas-sensitive reaction surface area furnished by one-dimensional worm-like WO3 nanowires. Meanwhile, as the building units, the worm-like nanowires promote the directional transmission of electrons, resulting in an improvement of WO3 gas sensing characteristics. (C) 2019 Elsevier B.V. All rights reserved.