| Autor: |
Modak, Mrudul, Mahajan, Sunil, Shinde, Manish, Rane, Sunit, Jagtap, Shweta |
| Předmět: |
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| Zdroj: |
Journal of Materials Science: Materials in Electronics; Dec2022, Vol. 33 Issue 35, p26205-26224, 20p |
| Abstrakt: |
ZnO and copper-doped ZnO nanocomposites with 1, 3, 5 and 7 wt% copper were synthesized using a simple co-precipitation method. Further, GO was synthesized by modified Hummer's method and the formation of Cu/ZnO/rGO composites was carried out by using chemical route. The structural properties of the synthesized nanocomposites were investigated using X-ray diffraction spectroscopy that revealed a hexagonal wurtzite structure of ZnO which remained intact even after incorporation of Cu 2 + ions into ZnO lattice. Optical studies revealed increased defect density and oxygen vacancies in the ZnO structure that can be utilized effectively for NO2 sensing application. Moreover, 5 wt% Cu/ZnO (ZC5) exhibited a nanorod-like morphology. Furthermore, ZC5 showed excellent sensing response (SR = 5) towards NO2 with lower detection limit (LOD) of 1 ppm which further improved due to rGO incorporation (ZCR2) (SR = 6.79) at 200 °C. The synthesized nanocomposites also exhibited very good stability ≈ 90 and 75 % for ZC5 and ZCR2 nanocomposites, respectively, over 30 days. Thus, ZC5 and ZCR2 can potentially be utilized as effective NO 2 gas sensors. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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