Electrochemistry of actinides on reduced graphene oxide: craving for the simultaneous voltammetric determination of uranium and plutonium in nuclear fuel

Abstract

Schematic representation of the interference of Pu(iv) in the voltammetric determination of U in a mixed U–Pu solution in 1 M H2SO4.

High effectiveness of pure polydopamine in extraction of uranium and plutonium from groundwater and seawater

“…The observed positions and quantity of the redox couples differ from the previously reported ones for U or Pu in literature for bare GC electrode and various conditions. [53][54][55] In particular, uranyl(VI) nitrate in conditions close to those of this study showed only one redox couple of U(VI)/U(V) in cathodic region at À0.01(ox) V/ À0.25(red) V (vs. Ag/AgCl). 53 A quite similar behavior with one redox couple of U(VI)/U(V) at À0.075/À0.2 V (vs. Ag/AgCl) was found for uranyl(VI) perchlorate on Pt electrode in aqueous solution of 0.1 M LiClO 4 .…”

“…graphene oxide (GO) or conducting polymer PEDOT-PSS) with or without pre-adsorbed radionuclide species. [53][54][55] In particular, in the case of GO layer with the pre-adsorbed uranyl deposited on GC electrode the position of U(VI)/U(V) redox couple shis to anodic region by around 205-250 mV in comparison to bare GC. 53 Moreover, the shape of the peaks became more complicated and additional weakly pronounced redox couple at 0.21 V/0.13 V appeared that suggested both change of valence state of U and altering the electronic conguration of uranyl(VI) cations due to their coordination with functional groups on the GO surface.…”

Template‐free Electrosynthesis of Platinum Nano‐Cauliflowers for Catalysing Electron Transfer Reaction of Plutonium

“…Hexachloroplatinic acid (H 2 PtCl 6 ), hydrochloric acid (HCl), potassium ferricyanide (K 3 [FeCN] 6 ), H 2 SO 4 of AR grades were used in the studies without any pre-treatment. A stock solution of known concentration of Pu was prepared from anhydrous potassium plutonium sulphate dihydrate (K 4 Pu(SO 4 ) 4 ) following our optimized method as described in details elsewhere [26]. Authors declare a precautionary statement to readers about handling Pu that it is a radioactive material and thus must be used in safe radiological facilities with proper training.…”

“…The heterogeneous electron transfer reaction of Pu(IV)/Pu (III) is found to be an electrochemically quasi-reversible redox reaction, which greatly depends on the nature of the electrode materials. Hence, the electrochemistry of Pu (IV)/Pu(III) had been investigated on glassy carbon electrode [19], platinum electrode [20], and electrodes modified with platinum nanoparticles [10], ruthenium nanoparticles [21], poly(3,4-ethylenedioxythiophene) polystyrene sulfonate [22,23], polyaniline and single-walled carbon nanotubes [24], graphene [25], and electrochemically reduced graphene oxide [26]. However, none of the modified electrodes practically could be able to replace the conventional Pt electrode for the routine electrochemical analysis of Pu.…”

Quaternary Ammonium Based Carboxyl Functionalized Ionic Liquid for Covalent Immobilization of Horseradish Peroxidase and Development of Electrochemical Hydrogen Peroxide Biosensor

“…In the emerging scientific world with exponential growth in the industrial and healthcare sector, reliable detection and quantification of crucial analytes is of utmost importance [1][2][3]. Different transduction techniques are evolved for this purpose, amongst which the electroanalytical techniques are exceedingly preferred owing to their high sensitivity, rapidity and ability to be made portable [4][5][6][7]. Especially, electrochemical biosensors afford highly dependable measurements than the nonenzymatic sensors due to their superior selectivity towards the target analyte [8][9][10].…”