Characterization of three-dimensional reduced graphene oxide/copper oxide heterostructures for hydrogen sulfide gas sensing application

JOURNAL OF ALLOYS AND COMPOUNDS

卷:740

Article

Mirmotallebi, Mona¹  Zad, Azam Iraji^1,2  Hosseini, Zahra Sadat¹  Jokar, Effat³ 

[1] Sharif Univ Technol, Dept Phys, POB 11365-9161, Tehran, Iran

[2] Sharif Univ Technol, Inst Nanosci & Nanotechnol Inst INST, POB 11155-8639, Tehran, Iran

[3] Natl Chiao Tung Univ, Inst Mol Sci, Dept Appl Chem, 1001 Ta Hsueh Rd, Hsinchu 30010, Taiwan

关键词: Three-dimensional structure;    Graphene;    Copper oxide;    Hydrogen sulfide;    Gas sensing;   

DOI  :  10.1016/j.jallcom.2018.01.041

来源: Elsevier

【 摘 要 】

Three-dimensional reduced graphene oxide (3D-rGO) structures decorated with CuO particles (GCu) are synthesized through a simple and scalable method for detection of hydrogen sulfide (H2S) gas. For characterization and investigation of porous structure various techniques were employed. Decorated 3D structures demonstrated higher sensitivity and selectivity in comparison to pure structure. Optimized structure for sensing was obtained through introducing different amounts of CuO. The GCu heterostructures containing 35 mu mol of CuO powder demonstrated reproducible response of about 30% to the concentration of 10 ppm at room temperature, while complete recovery was obtained through heating to 150 degrees C. Sensing behaviour of the samples to H2S gas was investigated at temperatures in the range of 25-150 degrees C and in different relative humidity levels from 3 to 80%. We discussed the sensing model based on the adsorption of H2S molecules on the additives, and electron injection to the sample, resulting in the electrical resistance enhancement. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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