Voltammetric monitoring of Cd (II) by nano-TiO2 modified carbon paste electrode sensitized using 1,2-bis-[o-aminophenyl thio] ethane as a new ion receptor

Ramezani, Soleyman; Ghobadi, Massoud; Bideh, Babak Nemati

doi:10.1016/j.snb.2013.11.033

Cited by 21 publications

(18 citation statements)

References 27 publications

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“…1,2-Di-(o-aminophenylthio)ethane (DAPTE) was prepared using the reported procedure (Ramezani et al 2014). Carbon graphite powder, paraffin oil, and room-temperature ionic liquid were purchased from the Fluka (USA).…”

Section: Reagents and Chemicalsmentioning

confidence: 99%

“…These and many other techniques often require quite extensive and time-consuming sample pretreatment, including preconcentration and matrix separation. In comparison, ion-selective electrodes (ISEs) require little sample preparation and manipulation while still permitting very wide ranges of linear response, low limits of detection, high selectivities, and the possibility to distinguish between the free metal ion and its complexes (Ramezani et al 2014). Carbon paste electrodes (CPEs) are one of the most interesting ISEs.…”

Section: Introductionmentioning

confidence: 99%

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Silica gel/gold nanoparticles/(NS)2 ligand nanoporous platform-modified ionic liquid carbon paste electrode for potentiometric ultratrace assessment of Ag(I)

Ramezani

Mashhadizadeh

Ghobadi

et al. 2016

Int. J. Environ. Sci. Technol.

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A novel ionic liquid carbon paste electrode has been developed using sol-gel/Au nanoparticle (SGAN) involving (NS) 2 compound of N,N 0 -di-(cyclopentadienecarbaldehyde)-1,2-di(o-aminophenylthio) ethane (CCAE) as an appropriate neutral ion-carrier for ultrahigh-sensitive potentiometric determination of Ag(I). Colloidal gold nanoparticles (AuNPs) also well dispersed self-assembly into the 3-(mercaptopropyl)-trimethoxysilane (MPTS)-derived sol-gel network through Au-S covalent bond engendering continuous and super-conductive nanoporous three-dimensional array. The room-temperature ionic liquid, 1-n-butyl-3-methylimidazolium tetrafluoroborate (BMIM.PF 6 ), was applied as a super-conductive pasting agent (binder). The SGAN/CCAE/IL-CPE exhibited a significantly enhanced sensitivity and preferential selectivity toward Ag(I) over a wide concentration range of 2.4 9 10 -9 to 2.2 9 10 -2 mol L -1 (R 2 = 0.9996) with a lower limit of detection of 7.9 9 10 -10 M and a Nernstian slope of 58.5 (±0.3) mV decade -1 . The electrode has a short response time of *5 s and long-time durability of about 2 months without any considerable divergence in potentials. Moreover, the potentiometric examinations could be carried out within the wide pH range of 3.5-9.5. Eventually, the practical utility of the proposed Ag(I)-sensor was evaluated by volumetric titration of AgNO 3 solution by sodium chloride and recovery of silver content in some real samples using flame atomic absorption spectroscopy as a confident reference.

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Section: Reagents and Chemicalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silica gel/gold nanoparticles/(NS)2 ligand nanoporous platform-modified ionic liquid carbon paste electrode for potentiometric ultratrace assessment of Ag(I)

Ramezani

Mashhadizadeh

Ghobadi

et al. 2016

Int. J. Environ. Sci. Technol.

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“…33 Therefore, in order to maximize the efficiency and sensitivity of the Hg(II) sensor, the optimization of the carbon paste ingredients was investigated, and the results are summarized in Table 2. 33 Therefore, in order to maximize the efficiency and sensitivity of the Hg(II) sensor, the optimization of the carbon paste ingredients was investigated, and the results are summarized in Table 2.…”

Section: Carbon Paste Ingredientsmentioning

confidence: 99%

“…As can be seen, each of the modifying additives has a reinforcing effect independently on the electrode response (no. 33 Because of the abovementioned statements, the BTMSOE-AuNPs-CNT modied CPE with the GP/PO/BTMSOE-AuNPs-CNT optimal percentage ratio of 63.5/32/4.5 was found and used as a preferred electrode with highest performance (highest peak current, least LOD, and wide LR). Nonetheless, an increasing amount of the modiers higher than the permitted limit in the composition of the carbon paste leads to less peak current and thus decreases its sensitivity.…”

Section: Carbon Paste Ingredientsmentioning

confidence: 99%

Structure-switching of an organothiol neutral carrier by gold nanoparticles decorated on SH-MWCNTs for ultra-trace voltammetric assay of Hg(ii) using a carbon paste electrode

et al. 2015

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A simple strategy has been developed based on 1,2-bis[5,2-thiolmethyl-sulphide-1,3,4-oxadiazol-2-yl]ethane (BTMSOE) as a novel ion-carrier for construction of a voltammetric Hg(II)-CPE. AuNPs not only have strong inter-particle binding affinity (Au-Au), but also have strong tendency to form S-Au covalent bonds with -SH functional groups. In view of this fact, by self-assembling of AuNPs, the spatial configuration of the thiol-terminated BTMSOE compound was switched from podant to macrocycletype ligand. The macrocycle-type BTMSOE-AuNP compound was then immobilized by self-assembly on the super-conductive MWCNT substrate via a (3-mercaptopropyl) trimethoxysilane (MPTS) covalent linker. Under the optimized conditions, the oxidative current I p,a (mA) exhibited a linear dependence on Hg(II) ion concentration in the wide dynamic concentration ranges of 3.5 Â 10 À11 to 3.7 Â 10 À7 M and 1.2 Â 10 À6 to 1.0 Â 10 À4 M (R 2 ¼ 0.9947 and 0.9992, respectively). Moreover, the limit of detection of the proposed sensor was 1.7 Â 10 À12 mol L À1 (S/N ¼ 3) at a working optimal pH of 4.2 adjusted by ABS as an appropriate supporting electrolyte. These features, specifically the high sensitivity and exceptional selectivity, were positively compared with those of previously reported methods in the area of electrochemical Hg(II) detection. Eventually, the practical utility of the prepared MWCNTs/AuNPs/ BTMSOE-CPE was assessed for efficient determination of Hg(II) contents in aqueous environmental samples with different matrices such as tap and mineral water, tuna fish, human hair, and tobacco.

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“…In researches a wide variety of modifiers nanomaterials have been used with Carbon paste electrode [1][2][3][4][5][6][7][8][9][10] . MWCNTs used as a proper sample for the modification of electrodes because fascinating properties such as high chemical stability, good electrical conductivity, extremely high mechanical strength, high electrocatalytic effect, and ability to promote electron-transfer reaction 11,12 .…”

Section: Introductionmentioning

confidence: 99%

A Sensitive Voltammetric Sensor for Determination of Glutathione Based on Multiwall Carbon Nanotubes Paste Electrode Incorporating Pyrogallol Red

Keyvanfard¹,

Alizad²

2014

Orient. J. Chem.

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A new sensitive and selective electrochemical sensor was developed for determination of glutathione (GSH) at the surface of carbon paste electrode (CPE) modified with multi-wall carbon nanotubes (MWCNTs) as a sensor and pyrogallol red (PGR) as a mediator. The mechanism of GSH electrochemical behavior at the modified electrode surface was investigated by various electrochemical techniques including chronoamperometry, cyclic voltammetry (CV) and square wave voltammetry (SWV). A linear calibration curve was obtained in the concentration range of GSH of 0.3-500 µmol L -1 , with a limit of detection of 0.19 µmol L -1 . The method was applied to the determination of GSH in urine samples with satisfactory results.

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Voltammetric monitoring of Cd (II) by nano-TiO2 modified carbon paste electrode sensitized using 1,2-bis-[o-aminophenyl thio] ethane as a new ion receptor

Cited by 21 publications

References 27 publications

Silica gel/gold nanoparticles/(NS)2 ligand nanoporous platform-modified ionic liquid carbon paste electrode for potentiometric ultratrace assessment of Ag(I)

Silica gel/gold nanoparticles/(NS)2 ligand nanoporous platform-modified ionic liquid carbon paste electrode for potentiometric ultratrace assessment of Ag(I)

Structure-switching of an organothiol neutral carrier by gold nanoparticles decorated on SH-MWCNTs for ultra-trace voltammetric assay of Hg(ii) using a carbon paste electrode

A Sensitive Voltammetric Sensor for Determination of Glutathione Based on Multiwall Carbon Nanotubes Paste Electrode Incorporating Pyrogallol Red

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