Acid-etched Fe/Fe₂O₃ nanoparticles encapsulated into carbon cloth as a novel voltammetric sensor for the simultaneous detection of Cd²⁺ and Pb²

Abstract

A portable electrode with approachable, available, high-sensitive is of great significance for the effective detection on-site in the practical situation. In this paper，a novel flexible, disposable sensor for Cd2+ and...

Sensitive and selective electrochemical determination of uric acid in urine based on ultrasmall iron oxide nanoparticles decorated urchin-like nitrogen-doped carbon

“…Satellite peaks of Fe 3+ were observed at 734.97 eV and 722.15 eV [40]. The XRD and XPS results showed that Fe/Fe 2 O 3 was successfully loaded onto the UNC [33] The N 2 adsorption-desorption isotherms and pore distribution of Fe x O y /UNC were shown in Fig. S2.…”

“…By heating in a tube furnace at 800 • C for 2 h (2 • C min − 1 ) under a nitrogen atmosphere, the carbonized product, UNC, was obtained [35]. The residual Fe 3+ in the material was reduced to Fe under the high-temperature condition [33]. Thereafter, 1.50 g carbonized UNC and 0.81 g Fe (NO 3 ) 3 .9 H 2 O were mixed into 50.0 mL ultrapure water, stirred for 2 h, and then poured into a 100.0 mL hydrothermal reaction kettle for 10 h reaction at 180 ℃ [36].…”

“…Inspired by this, we would like to develop a carbonized material with polymer as precursor for electrochemical detection of UA with high sensing performance. We loaded a layer of ultrasmall iron oxide nanoparticles with a large specific surface area [32], low toxicity, and low cost onto the surface of the hypercrosslinked-pyrrole carbonized product, urchin-like nitrogen-doped carbon (UNC), to increase its adsorption and binding sites [33] to develop an electrochemical sensor based on Fe x O y /UNC for detecting uric acid.…”

Disposable Sensors for Heavy Metals Detection: A Review of Carbon and Non‐Noble Metal‐Based Receptors

“…[116] Banks et al, have developed copper (Cu) based sensors modified with Bi film for detection of Cd 2 + and Pb 2 + . The electrodes were prepared on polyester paper using the toner transfer method Carbon Based receptors Fe/Fe2O3 nanoparticles encapsulated into carbon cloth 0.42 0.50 [52] carbon cement 5 1 [48] Bi-carbon cement 1 [32] a single-walled carbon nanohorns 0.2 0.4 [39] Graphene Based self-doped sulfonated polyaniline/antimony/graphite 00.416 0.20 [73] Graphene Paper-Nafion-Bi Nanostructures 0.1 0.1 [73] Reduced Graphene Oxide/L-Cysteine/Bi-Film 0.10 0.08 [112] g-C3 N4 Materials 17.5 8.1 [113] ionic liquid (IL) n-octylpyridinum hexafluorophosphate (OPFP) and graphene (GR) 3 [76] graphene-polyaniline nanocomposite 00.1 [77] electrochemically pretreated pencil-graphite electrode (EP-PGE) 1.11 0.46 [71] Bismuth/nafion 1.5 0.3 [128] Boron doped diamond 25 1 [129] Other (Polymers, enzymes, etc.) ion imprinted polymers 0.4 [131] pyrolyzed paper 0.16 0.19 [7] acetylcholinesterase enzyme 0.19 [132] Noble metals Gold based SPE 0.5 [133] Gold nanoparticles 2.2 [134] Silver nanoparticles 0.019 0.030 [135] ChemistrySelect which is similar to the method used for print circuit boards (PCB).…”

Electrochemical sensors modified with iron oxide nanoparticles/nanocomposites for voltammetric detection of Pb (II) in water: A review

“…Nonetheless, in their operation, bare iron oxide nanoparticles (IONPs) are limited by low specific surface area, agglomerations [ 40 , 41 ], mediator leakages [ 24 ], aggregations as a result of structure stacking [ 27 ], as well as limited functional groups and porous structure [ 42 ]. Moreover, the intrinsic conductivity of iron oxide is poor [ 43 ].…”