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Hydrogen sensing properties of nanocomposite graphene oxide/Co-based metal organic frameworks (Co-MOFs@GO)

Fardindoost, S ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1088/1361-6528/aa9829
  3. Publisher: Institute of Physics Publishing , 2018
  4. Abstract:
  5. This paper reports on hydrogen sensing based graphene oxide hybrid with Co-based metal organic frameworks (Co-MOFs@GO) prepared by the hydrothermal process. The texture and morphology of the hybrid were characterized by powder x-ray diffraction, scanning electron microscopy and Brunauer-Emmett-Teller analysis. Porous flower like structures assembled from Co-MOFs and GO flakes with sufficient specific surface area are obtained, which are ideal for gas molecules diffusion and interactions. Sensing performance of Co-MOFs@GO were tested and also improved by sputtering platinum (Pt) as a catalyst. The Pt-sputtered Co-MOFs@GO show outstanding hydrogen resistive-sensing with response and recovery times below 12 s at 15 °C. Also, they show stable, repeatable and selective responses to the target gas which make it suitable for the development of a high performance hydrogen sensor. © 2017 IOP Publishing Ltd
  6. Keywords:
  7. Graphene oxide ; Hydrogen sensors ; Metal organic frameworks ; Porous structure ; Resistance sensing ; Chemical sensors ; Crystalline materials ; Hydrogen ; Organometallics ; Platinum ; Scanning electron microscopy ; X ray diffraction ; Brunauer Emmett Teller analysis ; Flower-like structures ; Graphene oxides ; Hydrogen sensing properties ; Hydrogen sensor ; Metal organic framework ; Porous structures ; Powder X ray diffraction ; Graphene
  8. Source: Nanotechnology ; Volume 29, Issue 1 , 2018 ; 09574484 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/1361-6528/aa9829/meta