New efficient modified carbon paste electrode by Fe2O3@Ni/Al-LDH magnetic nanocomposite for the electrochemical detection of mercury

Dynamic Changes of Ni-Al LDH Nanosheets under Potential Cycling Investigated by In Situ Electrochemical Atomic Force Microscopy

“…Electrochemical capacitors, also known as supercapacitors, have attracted great interest as electrochemical energy storage devices because of their fast energy delivery, high power density, environmental friendliness, and long cycle life. − According to the charge storage mechanisms, supercapacitors can be generally divided into two categories: electrical double layer capacitors and Faraday pseudocapacitors. − In general, Faraday pseudocapacitors can provide superior specific capacitance by utilizing fast and reversible electrochemical redox reactions. − In order to improve the specific capacitance of supercapacitors, substantial effort has been focused on investigating the pseudocapacitive performance of metal oxides, metal sulfides, metal hydroxides, and conductive polymers. − As a kind of metal hydroxide, nickel-aluminum layered double hydroxides (Ni-Al LDHs) have broad application prospects as supercapacitor materials. − Compared with other LDH electrode materials (such as Ni-Co LDHs, Ni-Mn LDHs, and Co-Al LDHs), Ni-Al LDHs have an ultrahigh specific surface area, environmental performance, and low cost. − Li et al reported Ni­(OH) 2 -NiAl LDH with a specific capacity of 2123 F g –1 at a current density of 0.5 A g –1 . Huang et al .…”

Recent advances in the modification of electrodes for trace metal analysis: a review

“…32,98,101,142,148,154,158 However, the use of CNTs also faces challenges related to their synthesis (i.e., cost and specific route) as well as the need for binders to improve their mechanical stability. 196 Metals (i.e., Ag, Au, Bi, Pd, Pt, Pb, and Sn), [23][24][25]56,57 27,31,67,96,100,103,109,112,118,122,124,130,131,133,[135][136][137]188,197,198 are the most commonly used NPs in the modification of the electrodes. In addition, clinoptilolite (a naturally occurring zeolite containing Si and Al) NPs were ion exchanged in a Fe(II) solution, and the modified CPE obtained was used in the determination of Sn 2+ .…”

“…NMs have been primarily applied on the electrodes in combination with other modifiers (including through the formation of composites). 22–25,27,30–32,34,46,47,50,54,59,67,70,72,75,83,85,86,88,89,92–102,107,113,115,117,118,122–126,129–131,135,136,138–156,160,162,168,175,179–189 However, in most of these studies, due to the lack of discussing the sensing mechanism of these nanocomposite-modified electrodes, there is no clear understanding of the influence of different components on the sensitivity and/or selectivity of the electrodes. Apart from the combination of different NMs (usually a combination of NPs and MWCNTs), 83,98,99,101,107,113,115,128,129,133,139,162 compounds and/or materials belonging to the other main groups of electrode modifiers have also been combined with NMs to modify the electrodes.…”

“…, Ag, Au, Bi, Pd, Pt, Pb, and Sn), 23–25,56,57,59,64,70,83,86,87,93–95,97–99,101,102,104–106,108,110,113–115,117,120,121,123,125–127,129,132,134,138 metal oxides and mixed metal oxides ( i.e. , SiO 2 , SnO 2 , Fe 3 O 4 , Mn 3 O 4 , Cu 2 O/ZnO, FeAl 2 O 4 , MgFe 2 O 4 , ZnFe 2 O 4 , and NiFe 2 O 4 ) 27,31,67,96,100,103,109,112,118,122,124,130,131,133,135–137,188,197,198 are the most commonly used NPs in the modification of the electrodes. In addition, clinoptilolite (a naturally occurring zeolite containing Si and Al) NPs were ion exchanged in a Fe( ii ) solution, and the modified CPE obtained was used in the determination of Sn 2+ .…”

A Biocompatible Design of Kappa-Carrageenan/Functionalized-Boron Nitride Nanocomposite: The Disposable Electrode of Mercury Detection

“…[32][33][34] Much effort has been made in the development of electrocatalysts for electrochemical sensors based on various biopolymer, metal dichalcogenides, carbon, metal nanoparticles, metal oxide, MXene, layered double hydroxide, metal-organic framework, and so on towards Hg 2+ detection. 12,[35][36][37][38][39][40] Much of the current literature pay special attraction to the biopolymer-based nanocomposite material because of its non-toxicity, biocompatibility, low-cost, and facile preparation process. [41][42][43] Kappa-carrageenan (K-CGN), a natural linear polysaccharide extracted from the marine red algae, possesses outstanding attention in various applications due to its low density, flexibility, biocompatibility, sustainability, high specific surface area, and good catalytic property.…”