Ethanol gas sensing properties of hydrothermally grown α-MnO2 nanorods

JOURNAL OF ALLOYS AND COMPOUNDS

卷:727

Article

Liu, Chenshitao¹  Navale, S. T.^1,2  Yang, Z. B.¹  Galluzzi, M.^1,2  Patil, V. B.³  Cao, P. J.¹  Mane, R. S.⁴  Stadler, F. J.¹ 

[1] Shenzhen Univ, Nanshan Dist Key Lab Biopolymers & Safety Evaluat, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen Key Lab Polymer Sci & Technol,Coll Mat S, Shenzhen 518060, Peoples R China

[2] Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China

[3] Solapur Univ, Sch Phys Sci, Solapur 413255, MS, India

[4] Swami Ramanand Teerth Marathwada Univ, Ctr Nanomat & Energy Devices, Vishnupuri 431606, Nanded, India

关键词: Metal oxides;    Hydrothermal synthesis;    MnO2;    Nanorods;    Gas sensing properties;   

DOI  :  10.1016/j.jallcom.2017.08.150

来源: Elsevier

【 摘 要 】

In the present work, nanorods of alpha-manganese dioxide (alpha-MnO2 NRs) have been successfully synthesized using simple and cost-effective hydrothermal method, which further are utilized as a potential ethanol gas sensing material. As-synthesized alpha-MnO2 NRs are characterized for their structure and morphology by means of X-ray diffraction, Raman spectroscopy, energy dispersive X-ray spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, and atomic force microscopy measurement techniques, respectively. Structural elucidation confirms the formation of phasepure tetragonal alpha-MnO2. Randomly distributed alpha-MnO2 NRs demonstrate average diameter of similar to 50 -60 nm and length similar to 1-1.5 mm. Gas sensing properties of alpha-MnO2 NRs carried out systematically, as a function of time, towards various target gases and operating temperatures, corroborate excellent selectivity towards ethanol at 180 degrees C as an optimum operating temperature in addition to detect as little as 10 ppm ethanol gas. Furthermore, alpha-MnO2 NRs sensor shows the superior reproducibility and stability in response upon consecutive exposure of ethanol at 180 degrees C. Gas sensing study reveals the applicability of alpha-MnO2 NRs as a promising sensing material in the developing ethanol-based gas sensors. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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