کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6465037 1422951 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Facile synthesis of three-dimensional porous Au@Pt core-shell nanoflowers supported on graphene oxide for highly sensitive and selective detection of hydrazine
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Facile synthesis of three-dimensional porous Au@Pt core-shell nanoflowers supported on graphene oxide for highly sensitive and selective detection of hydrazine
چکیده انگلیسی


- Au@Pt-nFs/GO was synthesized through a facile and green one-pot method.
- Au@Pt-nFs/GO exhibit open structure with large surface area and abundant active site.
- Au@Pt-nFs/GO was employed to fabricate nonenzymatic N2H4 sensor.
- Au@Pt-nFs/GO reduced the overpotential and accelerated kinetics of N2H4 oxidation.
- Au@Pt-nFs/GO exhibit highly sensitive and selective detection of N2H4.

A novel strategy is developed to synthesize three-dimensional porous Au@Pt core-shell nanoflowers supported on GO (Au@Pt-nFs/GO) for enhanced electrochemical sensing of hydrazine (N2H4). Au@Pt-nFs/GO nanocomposite was synthesized through a facile and green method, where ascorbic acid and chitosan were employed as the reductant and linking agent, respectively. The experiment results revealed that a large numbers of Au@Pt-nFs with Au cores and Pt dendritic shells were distributed on the surface of GO sheets. Meanwhile, Au@Pt-nFs/GO with large surface area, abundant active sites and open structure reduced the overpotential and accelerated kinetics of N2H4 oxidation, therefore making the sensor based on Au@Pt-nFs/GO exhibit an excellent performance for N2H4 analysis with a wide linear range of 0.8 μM-0.429 mM, a high sensitivity of 1695.3 μA mM−1 cm−2 and a low detection limit of 0.43 μM (S/N = 3). Moreover, the sensor also exhibited good selectivity, repeatability and stability. Application of the sensor for the detection of N2H4 in tap water samples was demonstrated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 327, 1 November 2017, Pages 431-440
نویسندگان
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