Atyam, K.K. and Ghosh, A. and Mukherjee, K. and Majumder, S.B. (2015) Hematite iron oxide nano-particles: facile synthesis and their chemi-resistive response towards hydrogen. Materials Research Express, 2 (5). 55901(1-7).

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In the present work, hematite iron oxide nano-particles are synthesized through a facile wet chemical precipitation route. The phase formation behavior and microstructure evolution of the synthesized nano-particles are studied using infrared spectroscopy in conjunction with x-ray diffraction analyses and electron microscopy. Chemi-resistive type hydrogen sensing characteristics (e.g. response %, response time, recovery time) of hematite iron oxide nano-particulate sensing element are evaluated using an automated, dynamic flow gas sensing measurement set-up. The sensing characteristics are measured by varying the operating temperature (275–350 °C) of the sensor and concentration of hydrogen (250–1660 ppm). From the operating temperature dependence of response and recovery times, we have estimated the respective activation energies for response and recovery processes.

Item Type: Article
Subjects: Nanomaterials & composites
Depositing User: Dr. Sarita Ghosh
Date Deposited: 14 Sep 2016 06:18
Last Modified: 14 Sep 2016 12:01

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