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Sea urchin-like SnO2/α-Fe2O3 heterostructural microspheres for enhanced acetone gas sensing: Materials preparation, performance evaluation, and mechanism investigation by Shengrui Xu; Miaomiao Wang; Chang-Po Chen; Suling Feng is a Engineering article available to read on EtoBox.
What is Sea urchin-like SnO2/α-Fe2O3 heterostructural microspheres for enhanced acetone gas sensing: Materials preparation, performance evaluation, and mechanism investigation about?
Herein, sea urchin-like SnO 2 /α-Fe 2 O 3 (SU-SnO 2 /α-Fe 2 O 3 ) heterostructural microspheres was prepared successfully by two-steps hydrothermal treatment, and used as semiconductor for acetone gas sensing. SEM and TEM characterizations showed that as-prepared composites exhibited sea urchin-like morphology with microstructures of inner SnO 2 microspheres and outer vertically grown α-Fe 2 O 3 nanorods. SnO 2 /α-Fe 2 O 3 microspheres presented higher and faster response / recovery for acetone in comparison to pure SnO 2 . At the optimum temperature of 300 • C, response value of SU-SnO 2 /α-Fe 2 O 3 sensor reached 18.7 towards acetone vapor with concentration of 100 ppm. The response time was 8 s, and recovery time was 2 s. Moreover, the proposed method displayed an excellent linearity for measuring acetone vapor with concentration range of 1-200 ppm. The improvement of gas sensing properties for SnO 2 /α-Fe 2 O 3 microspheres was ascribed to the unique microstructures, formation of heterojunction, and abundant adsorbed oxygen. To further demonstrate the promoted mechanism, adsorption behavior of as-prepared composites for acetone molecule was investigated by densityfunctional the
Who reads Sea urchin-like SnO2/α-Fe2O3 heterostructural microspheres for enhanced acetone gas sensing: Materials preparation, performance evaluation, and mechanism investigation?
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- Author
- Shengrui Xu; Miaomiao Wang; Chang-Po Chen; Suling Feng
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)
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