کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155081 | 1666336 | 2019 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel approach to fabricating a ternary rGO/ZnO/Pt system for high-performance hydrogen sensor at low operating temperatures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A novel approach to fabricating a ternary rGO/ZnO/Pt system for high-performance hydrogen sensor at low operating temperatures A novel approach to fabricating a ternary rGO/ZnO/Pt system for high-performance hydrogen sensor at low operating temperatures](/preview/png/10155081.png)
چکیده انگلیسی
A novel method for the synthesis of a ternary platinum loaded reduced graphene oxide (rGO)/ zinc oxide (ZnO) hybrid nanocomposite via a pulsed laser ablation in liquid (PLAL) and direct current (DC) sputtering for a hydrogen sensing application is reported here. The said composite was fabricated to obtain small ZnO nanoparticles with interfacial electric contact without using chemical reagents. Firstly, ZnO nanoparticles were fabricated by the decomposition of zinc peroxide (ZnO2) quantum dots, synthesized by laser ablation of microstructured Zn powder in 3%H2O2, whereas GO was prepared by the modified Hummer method. Secondly, an rGO/ZnO nanocomposite was prepared via PLAL of ZnO and graphene oxide (GO) in deionized water. Finally, DC sputtering was used to decorate the surface of the rGO/ZnO hybrid with a Pt thin film to obtain a ternary rGO/ZnO/Pt hybrid nanocomposite. Maximum sensing performance was achieved by tuning the thickness of the deposited Pt layer. According to our study, the Pt-loaded rGO/ZnO gas sensor, with a thickness of 2â¯nm, showed an excellent response and selectivity towards a low concentration of hydrogen, giving a high response of about 99% (â400â¯ppm), which was 10 and 5 times higher than those of the pure ZnO, and the rGO/ZnO nanocomposite, respectively. This significantly improved response was mainly attributed to the high surface area of the rGO, the fast spill-over effect of the uniformly coated Pt nanoparticles, and the formation of a p-n junction between rGO and ZnO nanoparticles. This study indicates that the obtained rGO/ZnO/Pt hybrid nanocomposite is a promising candidate for constructing high-performance H2 gas sensors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 464, 15 January 2019, Pages 616-626
Journal: Applied Surface Science - Volume 464, 15 January 2019, Pages 616-626
نویسندگان
Q.A. Drmosh, Z.H. Yamani, A.H. Hendi, M.A. Gondal, R.A. Moqbel, T.A. Saleh, M.Y. Khan,