A Facile One-Pot Synthesis of Au/Cu2O Nanocomposites for Nonenzymatic Detection of Hydrogen Peroxide

Abstract

Au/Cu2O nanocomposites were successfully synthesized by a facile one-pot redox reaction without additional reducing agent under room temperature. The morphologies and structures of the as-prepared products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The electrocatalytic performance of Au/Cu2O nanocomposites towards hydrogen peroxide was evaluated by cyclic voltammetry (CV) and chronoamperometry (CA). The prepared Au/Cu2O nanocomposite electrode showed a wide linear range from 25 to 11.2 mM (R = 0.9989) with a low detection limit of 1.05 μM (S/N = 3) and high sensitivity of 292.89 mA mM−1 cm−2. The enhanced performance for H2O2 detection can be attributed to the introduction of Au and the synergistic effect between Au and Cu2O. It is demonstrated that the Au/Cu2O nanocomposites material could be a promising candidate for H2O2 detection.

Engineering Active Sites of Gold-Cuprous Oxide Catalysts for Electrocatalytic Oxygen Reduction Reaction

“…The Cu 2 O cubes were synthesized following a method . Briefly, CuCl 2 solution was heated to 55 °C, and then NaOH and ascorbic acid were added to obtain a dark brown solution.…”

“…The Cu 2 O cubes were synthesized following a method. 44 Briefly, CuCl 2 solution was heated to 55 °C, and then NaOH and ascorbic acid were added to obtain a dark brown solution. The solution was kept at 60 °C for 12 h, followed by centrifugation and washing.…”

Synthesis of Palladium, ZnFe2O4 Functionalized Reduced Graphene Oxide Nanocomposites as H2O2 Detector

“…The Pd/ZnFe 2 O 4 /rGO-GCE possesses higher sensitivity which is contributed to the unique properties of rGO and the synergistic effect of Pd and ZnFe 2 O 4 . The sensitivity of Pd/ZnFe 2 O 4 /rGO-GCE is also higher than some previously reported values of other electrodes in Table . − Figure b shows the amperometric response of Pd/ZnFe 2 O 4 /rGO to the successive addition of H 2 O 2 at different concentrations under the applied potential of −0.2 V. The Pd/ZnFe 2 O 4 /rGO can detect H 2 O 2 in a wide linear range from 25 μM to 10.2 mM. The linear regression equation corresponding to Pd/ZnFe 2 O 4 /rGO electrode is y = −43.9412 x –17.66315 [ y (μA); x (mM)] with a correlation coefficient of R 2 = 0.998.…”

Efficient Multifunctional Catalytic and Sensing Properties of Synthesized Ruthenium Oxide Nanoparticles

“…Prototypically, Gao et al discovered that magnetite nanoparticles exhibit intrinsic peroxidase-like activity similar to that of a natural peroxidase enzyme [33]. H 2 O 2 plays a vital role as an intermediate in food, pharmaceutical, clinical, and environmental analysis [34][35][36]. So, the detection of H 2 O 2 has been done by using different nanoparticles.…”