Effects of Connection Mode on Ethanol Gas-Sensing Properties of Different WO₃ Nanostructures

Abstract

Here, we used a simple hydrothermal route to controllably synthesize a connection-enriched two-dimensional WO3 network comprising nanorods and a transfer-favored two-dimensional WO3 network comprising nanowires. The network compositions were studied by X-ray powder diffraction. Their structures were observed by transmission electron microscope and scanning electron microscope imaging. We used ethanol vapor to test the gas-sensing performances of the two kinds of networks. The gas sensitivity test results showed that the connection-enriched two-dimensional WO3 network comprising nanorods and a transfer-favored two-dimensional WO3 network comprising nanowires obtained a gas response of 12.5 and 27.5, to 200 ppm ethanol at 300 ℃. We attribute these differences to greater density of electron transmission channels in the former network.

Novel Electrochemical Aptasensor Based on Floral Zinc Oxide/Reduced Graphene Oxide/Colloidal Gold Composite for the Detection of Tetracycline, Doxycycline and Oxytetracycline in Milk

“…26 In recent years, nanomaterials have become an area of focus in modern materials science. 27 An aptamer was a nucleotide with only one chain, similar to the way that an antibody recognized an antigen, and could accurately, rapidly, and specifically bind to the target molecule. 28 Moreover, aptamers had unparalleled advantages compared with other recognition elements.…”