Solution-processed rapid synthesis strategy of Co3O4 for the sensitive and selective detection of H2S

SENSORS AND ACTUATORS B-CHEMICAL

卷:245

Article

Navale, S. T.^1,2  Liu, Chenshitao¹  Gaikar, P. S.³  Patil, V. B.⁴  Sagar, R. U. R.^1,2  Du, B.¹  Mane, R. S.⁵  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] Inst Sci, Dept Phys, Nagpur 440008, Maharashtra, India

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

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

关键词: Metal oxides;    CBD;    Co3O4;    Gas sensing properties;    H2S sensor;   

DOI  :  10.1016/j.snb.2017.01.195

来源: Elsevier

【 摘 要 】

A simple, rapid, and inexpensive solution-processed synthesis strategy for mass production of cobalt oxide (Co3O4) micro-dandelions has been applied and reported. As-synthesized Co3O4 micro-dandelions are initially characterized for their structure and morphology confirmations and subsequently utilized for the fabrication of low-cost high-performance hydrogen sulfide (H2S) gas sensor. Structural analysis is in accordance with the formation of polycrystalline face-centered cubic Co3O4. Several aggregated Co3O4 micro-dandelions, composed of number of individual nano-needles, with substantial porosity are evidenced from the surface morphological analysis. Gas sensing results demonstrate that the Co3O4 micro-dandelions reveal higher selectivity to H2S gas at the operating temperature of 200 degrees C. Maximum response of 481% is corroborated to 200 ppm of H2S at 200 degrees C. In addition, Co3O4 micro-dandelions detect H2S at levels as low as 5 ppm with enhanced response of 68%, rapid response time of 5 s and recovery time of 30 s, demonstrating its potential as a sensing material in the development of H2S related sensors. (C) 2017 Elsevier B.V. All rights reserved.

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