Selective voltammetric determination of Cu(II) based on multiwalled carbon nanotube and nano-porous Cu-ion imprinted polymer

Simultaneous Determination of Copper, Lead, and Cadmium Ions at a Mo 6 S 9-x I x Nanowires Modified Glassy Carbon Electrode Using Differential Pulse Anodic Stripping Voltammetry

“…Various nanomaterials such as nanoparticles [12][13][14][15], nanotubes [16][17][18][19], nanosheets [20][21], nanocomposites [22][23][24][25], nanowires [26] A C C E P T E D M A N U S C R I P T and non-conductive nanospheres [27] have been synthesized and employed in detection of environmental recognition events. The results indicate that the application of nanomaterials has brought about great improvements in both the sensitivity and selectivity for the determination of heavy metals.…”

Eletrochemically Actuated Stop–Go Valves for Capillary Force‐Operated Diagnostic Microsystems

“…GCE/MWCNT‐Polyhis presents several advantages compared to other reported Cu(II) sensors based on CNT modified GCEs 19, 22–26 and CNT modified carbon paste electrodes 27. In most cases, the detection of Cu was focused on the preconcentration of Cu(II) by reducing it on the electrode surface at negative potentials (−1.00 V or −0.60 V) followed by the quantification of the deposited material by anodic stripping voltammetry 22, 27. In those cases, the selectivity to discriminate copper against other cationic metals that can be co‐deposited under the same preconcentration procedure depends exclusively on the peak potential separation and resolution of the anodic stripping voltammetry signal.…”

“…Some authors have also done the preconcentration of Cu(II) at open circuit potential 19, 23–26 based on Cu(II) complexation with some chelating agents like L ‐cysteine 19, 23, poly(2‐amino‐4‐thiazoleacetic acid) 24, poly(2‐aminothiazole) 25, or tripeptide Gly‐Gly‐His 26, although the determination was done from anodic stripping analysis previous reduction of the complexed Cu(II) 19, 23–25. At variance with those methods for Cu(II) determination, the proposed sensor presents the advantage of better selectivity than other platforms 19, 22–27. Moreover, the sensitivity of our sensor is better than those obtained with GCE/MWCNT‐poly(1,2‐diaminobenzene) 22 and Cu‐ion imprinted polymer‐MWCNT‐modified carbon paste electrode 27, and comparable to the ones obtained with GCE/MWCNT‐poly(2‐amino‐4‐thiazoleacetic acid) 24 and GCE/MWCNT‐poly(2‐aminothiazole) 25.…”

“…At variance with those methods for Cu(II) determination, the proposed sensor presents the advantage of better selectivity than other platforms 19, 22–27. Moreover, the sensitivity of our sensor is better than those obtained with GCE/MWCNT‐poly(1,2‐diaminobenzene) 22 and Cu‐ion imprinted polymer‐MWCNT‐modified carbon paste electrode 27, and comparable to the ones obtained with GCE/MWCNT‐poly(2‐amino‐4‐thiazoleacetic acid) 24 and GCE/MWCNT‐poly(2‐aminothiazole) 25. It is smaller than the sensitivities obtained using a GCE modified in a more complex way using an hybrid material (GCE/SWCNT‐gold nanoparticle‐ L ‐cysteine) 19.…”

Synthesis and Characterization of Surface Ion-imprinted Polymer Based on Mesoporous Silica SBA-15 for Selective Removal of Cu(II) from Aqueous Solutions

“…The advances in this field have found that the support materials usually used include magnetic materials [21], carbon-based materials [22], silicon-based materials [23] and so on. Among mesoporous silicon family, SBA-15 is an attractive candidate to be used as a support for surface ion imprinting polymer due to its large surface area, highly ordered pore, thick pore walls with high hydrothermal stability and available surface functionalization [24,25].…”