Rapidly synthesis of AuM (M = Pt, Pd) hexagonals/graphene quantum dots nanostructures and their application for non-enzyme hydrogen peroxide detection

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发表日期：

2024年9月12日

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Tran Thi Bich Quyen,
Ngo Nguyen Tra My,
Nguyen Thi Quyen Tran,
Tran Minh Khang,
Luong Huynh Vu Thanh,
Bui Le Anh Tuan,
Duy Toan Pham,
Nguyen Le Thanh Huynh

摘要

In this study, AuM (M = Pt, Pd) bimetallic hexagonals (AuM BHGs) were successfully combined with graphene quantum dots (GQDs) by a simple method at ambient temperature (~ 30 °C) to form AuM BHGs/GQDs nanocomposites with enhanced properties and electro-activities. The synthesized AuM BHGs/GQDs were also characterized by UV–Vis, XRD, FTIR, XPS, AFM, TEM, and EDS. The novel AuM BHGs/GQDs were successfully synthesized, possessed an average particle size of AuM BHGs (~ 50–60 nm) and GQDs (~ 6–16 nm), and were homogeneously distributed in the dispersion. Furthermore, AuM BHGs/GQDs nanocomposites were also investigated as a sensitive sensor in the H₂O₂ detection by cyclic voltammetry method, with a low H₂O₂ limit of detection (LOD) of 0.865 nM, high sensitivity of 1.27 μAnM⁻¹cm⁻² and a wide detection range from 10^–12 to 10^–3 M. Therefore, AuM BHG/GQDs nanocomposites could be used to detect H₂O₂ with high sensitivity and fast response.

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