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

• Published in: Journal of materials research 2024-11, Vol.39 (21), p.2947-2961
• Main Authors: Quyen, Tran Thi Bich, My, Ngo Nguyen Tra, Tran, Nguyen Thi Quyen, Khang, Tran Minh, Thanh, Luong Huynh Vu, Le Anh Tuan, Bui, Pham, Duy Toan, Le Thanh Huynh, Nguyen
• Format: Article
• Language: English
• Subjects: Ambient temperature; Applied and Technical Physics; Bimetals; Biomaterials; Chemistry and Materials Science; Graphene; Hydrogen peroxide; Inorganic Chemistry; Materials Engineering; Materials Science; Nanocomposites; Nanotechnology; Palladium; Platinum; Quantum dots; Sensitivity; Synthesis; X ray photoelectron spectroscopy
• ISSN: 0884-2914; 2044-5326
• DOI: 10.1557/s43578-024-01435-0

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 H 2 O 2 detection by cyclic voltammetry method, with a low H 2 O 2 limit of detection (LOD) of 0.865 nM, high sensitivity of 1.27 μAnM −1 cm −2 and a wide detection range from 10 –12 to 10 –3 M. Therefore, AuM BHG/GQDs nanocomposites could be used to detect H 2 O 2 with high sensitivity and fast response. Graphical abstract