One-Step Synthesis of Large-Scale Graphene Film Doped with Gold Nanoparticles at Liquid–Air Interface for Electrochemistry and Raman Detection Applications

Abstract

We demonstrated a facile one-step synthesis strategy for the preparation of a large-scale reduced graphene oxide multilayered film doped with gold nanoparticles (RGO/AuNP film) and applied this film as functional nanomaterials for electrochemistry and Raman detection applications. The related applications of the fabricated RGO/AuNP film in electrochemical nonenzymatic H2O2 biosensor, electrochemical oxygen reduction reaction (ORR), and surface-enhanced Raman scattering (SERS) detection were investigated. Electrochemical data indicate that the H2O2 biosensor fabricated by RGO/AuNP film shows a wide linear range, low limitation of detection, high selectivity, and long-term stability. In addition, it was proved that the created RGO/AuNP film also exhibits excellent ORR electrochemical catalysis performance. The created RGO/AuNP film, when serving as SERS biodetection platform, presents outstanding performances in detecting 4-aminothiophenol with an enhancement factor of approximately 5.6 × 10(5) as well as 2-thiouracil sensing with a low concentration to 1 μM. It is expected that this facile strategy for fabricating large-scale graphene film doped with metallic nanoparticles will spark inspirations in preparing functional nanomaterials and further extend their applications in drug delivery, wastewater purification, and bioenergy.

One-step hydrothermal synthesis, characterization, and electrochemical sensor application of ternary Mn-Mo-O hybrid materials

“…Nowadays, considerable effort has been devoted to the synthesis of morphologically special functional materials [7][8][9][10], and it also helps to understand many new fundamental chemical and physical phenomena, such as the oriented aggregation mechanism of crystal growth [11,12], the Kirkendall effect [13][14][15], and the Ostwald ripening mechanism [16][17][18] for the formation of different structures. Transition metal oxides (TMO), as a group of functional materials with different morphologies and structures, have been widely studied due to their excellent performances and potential applications in various fields.…”

MoS2 nanosheets decorated with gold nanoparticles for rechargeable Li–O2 batteries

“…[6][7][8] To overcome these problems, many efforts have been performed, in which the easiest and most popular solution is using a catalyst to promote the catalytic activities of electrode materials. [9][10][11][12][13][14][15] Many catalysts, such as non-noble metals, 9 metal compounds, 10,11 noble metals, [12][13][14] and carbon materials, 15 have been used for the cathode catalysts of Li-O 2 batteries in order to reduce the overpotential, facilitate the reaction process, and suppress the decomposition of the electrolyte. Inspired by the great success of graphene materials, recently other two-dimensional (2D) graphene-like transition metal dichaleogenides (TMDs) like WS 2 , TiS 2 , and MoO 3 have been synthesized and utilized for various applications.…”

“…38 shows the Au 4f spectrum, and the peaks shown in 87.8 (Au 4f 5/2 ) and 84.2 eV (Au 4f 7/2 ) provide direct evidence for the formation of AuNPs on MoS 2 nanosheets. 14 On the basis of the N 2 adsorption-desorption measurement, the specific surface area of the Super P and MoS 2 /AuNP nanohybrids were calculated to be about 62.0 and 213.6 m 2 ·g -1…”

Design, fabrication, and biomedical applications of bioinspired peptide–inorganic nanomaterial hybrids

“…[12][13][14] There are many advantages for biomolecule-guided self-assembly, such as (i) simple operation and mild reaction condition in the air-liquid interface; (ii) effective utilization ratio of raw materials and high yield of products; (iii) rarely used toxic reagent and nearly no residual byproduct. [15][16][17] By using self-assembled peptide conjugates as building blocks, a large number of bioinspired hybrid nanomaterials exhibit a variety of promising applications, such as biomineralization, cell targeting, bioimaging, biosensors and biocatalyst (Scheme 1). In this review, the self-assembly mechanism of several kinds of peptide-inorganic nanomaterial conjugates are roughly summarized.…”