Electrochemical Detection of Persulfate at the Modified Glassy Carbon Electrode with Nanocomposite Containing Nano‐Ruthenium Oxide/Thionine and Nano‐Ruthenium Oxide/Celestine Blue

Abstract

The present study describes the fabrication of a sensitive amperometric sensor for the determination of persulfate. The immobilization surface was prepared by modifying a glassy carbon (GC) electrode with a nanocomposite containing ruthenium oxide (RuOx) nanoparticles and thionine (TH) or celestin blue (CB). The modified electrodes indicated excellent electrocatalytic activity toward persulfate reduction at a potential of +0.1 V. The proposed sensor showed detection limits of 1.46 µM for the GC/RuOx/TH modified electrode and 2.64 µM for the GC/RuOx/CB modified electrode. The sensitivities were obtained as 3 nA µM−1 at a concentration range of 10 µM to 11 mM for the GC/RuOx/TH modified electrode and 1 nA µM−1 at a concentration range of 10 µM to 6 mM for the GC/RuOx/CB modified electrodes.

Manganese Oxide Nanoparticles/Reduced Graphene Oxide as Novel Electrochemical Platform for Immobilization of FAD and its Application as Highly Sensitive Persulfate Sensor

“…As can be shown in Figure 7D, linear calibration curve over the range 0.1–1.2 μM (18 points) is: I pc (µA)=0.1258 [S 2 O 8 2− ] (µM)+0.0026 µA and R 2 =0.9948, which indicating that the regression line is fitted very well with the experimental data and the regression equation can be applied in the unknown sample determination. The detection limit (signal to noise was 3) and sensitivity were 90 nM and 125.8 nA/μM, respectively, which is comparable or better than reported values for other S 2 O 8 2− electrochemical sensors 14, 47–53. Another attractive feature of our proposed electrode was its highly stable amperometric response to S 2 O 8 2− .…”

A highly sensitive persulfate sensor based on a hybrid nanocomposite with silicomolybdate doping poly(3,4-ethylenedioxythiophene) on multi-walled carbon nanotubes

“…25 Roushani and Karami have reported a nanocomposite containing nano-ruthenium oxide/thionine and nano-ruthenium oxide/celestine blue for electrochemical detection of S 2 O 8 2À . 26 The applicability of graphene quantum dots/riboavin nanocomposite modied electrode as amperometric sensor for S 2 O 8 2À detection was investigated for the detection of S 2 O 8 2À . 27 However, some of them are not eco-friendly such as those using lead or dye composites.…”

Electrochemical Sensor for Hydrogen Peroxide Based on Prussian Blue Electrochemically Deposited at the TiO2-ZrO2–Doped Carbon Nanotube Glassy Carbon-Modified Electrode

“…The combination of PB with CNTs and nanostructured metal oxides ( Roushani et al, 2013a ; Roushani et al, 2013b ; Salimi et al, 2013 ; Roushani and Karami, 2014 ; Roushani and Dizajdizi, 2015 ; Roushani and Dizajdizi, 2016 ) can generate novel results for good electrical communication between the recognition system and the electrode surface. Zirconium oxide (ZrO 2 ) nanoparticles have been used as an electrochemical biosensor platform for oral cancer detection by cyclic voltammetry ( Zong et al, 2007 ; Zhao et al, 2020 ; Rathee et al, 2021 ).…”