access icon free Facile synthesis of nano-structured SnO2 films and their properties in ethanol gas sensing

Four types of nano-structured SnO2 thin films were synthesised via a facile one-step hydrothermal method on Ti substrate. All the films were prepared by using SnCl4 and NaOH as the precursors with urea, mercaptoacetic acid or sodium citrate as the adjusting reagent. The prepared films were characterised by scanning electron microscope, X-ray diffractometer, X-ray photoelectron spectroscopy (XPS) and their properties in ethanol gas sensing were examined. It was found that addition of organic reagents resulted in the formation of different nano-scaled morphologies, i.e. nanowires, nanonets, transparent nanosheets and nanograsses. The characterisation of XPS indicated that SnO2 was successfully deposited. The gas sensing experiments revealed that morphologies of the nano-SnO2 films had a great effect on their gas sensing properties. The possible reasons involved were presented.

Inspec keywords: X-ray photoelectron spectra; scanning electron microscopy; nanofabrication; gas sensors; tin compounds; nanosensors; semiconductor thin films; nanowires; organic compounds; X-ray diffraction; semiconductor growth

Other keywords: gas sensing experiments; Ti substrate; facile synthesis; gas sensing properties; adjusting reagent; nanoscaled morphologies; X-ray photoelectron spectroscopy; mercaptoacetic acid; facile one-step hydrothermal method; nanowires; nanograsses; Ti; scanning electron microscope; X-ray diffractometer; XPS; nanostructured SnO2 films; organic reagents; ethanol gas sensing; transparent nanosheets; SnO2; nanonets

Subjects: Low-dimensional structures: growth, structure and nonelectronic properties; Microsensors and nanosensors; Optical properties of other inorganic semiconductors and insulators (thin films, low-dimensional and nanoscale structures); Nanometre-scale semiconductor fabrication technology; Electron spectroscopy for chemical analysis (photoelectron, Auger spectroscopy, etc.); Chemical sensors; Nanofabrication using thin film deposition methods; Chemical sensors; Thin film growth, structure, and epitaxy; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2017.0806
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