Microwave-radiated synthesis of gold nanoparticles/carbon nanotubes composites and its application to voltammetric detection of trace mercury(II)

Electrocatalysis of gold nanoparticles/layered double hydroxides nanocomposites toward methanol electro-oxidation in alkaline medium

“…These unique properties allow them to provide important functions like electroanalysis and the construction of electrochemical sensors [19][20][21][22]. Herein, we present the synthesis of a AuNPs/LDH composite via hydrothermal treatment followed by a reduction procedure, and we explore the electrocatalytic activity of the as-prepared nanocomposite for methanol oxidation.…”

Stripping voltammetric detection of mercury(II) based on a surface ion imprinting strategy in electropolymerized microporous poly(2-mercaptobenzothiazole) films modified glassy carbon electrode

“…This detection limit is significantly lower than that at modified GCE previously reported. For example, it was found that the detection limit was 0.2 nM at a p-tert-butylthiacalix [4]arene modified GCE [6], 0.3 nM at a Au-NPs/CNTs modified GCE [38], 0.3 nM at a polyviologen modified GCE [9], 10.0 nM at a 2,5-dimercapto-1,3,4-thiadiazole modified GCE and poly(EDTA-like) film modified GCE [10], 15 nM at a poly(vinylsulfonic acid) modified sol-gel carbon composite electrodes [39] and 400.0 nM at a poly(2-mercaptobenzothiazole) film modified GCE [8]. The detection limit of the imprinted MPMBT/GCE seems much higher than the reported 4,7,13,16,21,24-hexaoxa-1, 10-diazabicyclo[8 8 8]hexacosane modified GCE (0.2 ppt) [40] and bimetallic Au-Pt nanoparticles/organic nanofibers modified GCE (0.008 ppt) [41].…”

Effect of KNO3 to remove silver interferences in the determination of mercury(II): Application in milk and breast milk samples

“…It should, however, be pointed out that even though the DL obtained in the present study are comparable to the values obtained in the literature. However, it was slightly less sensitive than those obtained by, vibrating gold microwire electrode (3.5 Â 10 À10 mol L À1 ) [14], electrode modified with a novel ion imprinted polymeric (5.0 Â 10 À9 mol L À1 ) [28], carbon nanotubes paste electrode modified with crosslinked chitosan (2.4 Â 10 À9 mol L À1 ) [29], glassy carbon electrode modified by gold nanoparticles/carbon nanotubes (3.0 Â 10 À10 mol L À1 ) [30] and is near than those obtained with carbon paste electrode (4.1 Â 10 À8 mol L À1 ) [20].…”