Simple Synthesis of Mesoporous SnO2 Microspheres and their Gas Sensing Properties

Zhi Peng Sun; Yi Lu

doi:10.4028/www.scientific.net/AMR.1044-1045.96

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1044-1045Simple Synthesis of Mesoporous SnO2 Microspheres...

Simple Synthesis of Mesoporous SnO₂ Microspheres and their Gas Sensing Properties

Abstract:

In this work, uniform mesoporous SnO₂ microspheres have been prepared via a facile and scalable method using tin tetrachloride pentahydrate (SnCl₄·5H₂O) and resorcinol-formaldehyde gel (RF gel) as starting materials. Furthermore, the structure and morphology of the as-prepared product were characterized by scanning electron microscope (SEM), Transmission electron microscope (TEM) and X-ray diffractometer (XRD). The results revealed that as-synthesized microspheres were around 500 nm in size and composed of large amount of SnO₂ nanoparticles with diameters of 10-20 nm. Gas sensors based on mesoporous SnO₂microspheres were fabricated, and their gas sensing properties were tested for response to methane, butane, H₂ and CO gas. The sensor exhibited better sensitivity and selectivity to H₂ vapors at 300 °C than that of the conventional SnO₂ materials. The enhancement in gas sensing properties was attributed to their unique nanostructures.

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Advanced Materials Research (Volumes 1044-1045)

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96-99

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https://doi.org/10.4028/www.scientific.net/AMR.1044-1045.96

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Online since:

October 2014

Authors:

Zhi Peng Sun, Yi Lu

Keywords:

Gas Sensing Properties, Microspheres, SnO₂

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