Derivative voltammetric direct simultaneous determination of nitrophenol isomers at a carbon nanotube modified electrode

Luo, Liqiang; Zou, Xuelian; Ding, Yaping; Wu, Qingsheng

doi:10.1016/j.snb.2008.07.019

Cited by 134 publications

(54 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These phenomena indicate that the appearance of peak couples, a 2 /c 2 , a 3 /c 3 , and a 4 /c 4 , are concerned with the nitryl reduction of peak c 1 , meaning that the products of nitrophenol by irreversible reduction remain on or close to the modified electrode surface and are oxidized again on the subsequent anodic scan. This conclusion is consistent with that reported by Luo [19]. Moreover, Hu [7], Mhammedi [20], Compton [21], and Kubota [22] also reported that p-nitrophenol could be transferred to p-hydroxylaminophenol (/NHOH) via the irreversible four-electron transfer, while p-hydroxylaminophenol could be transferred easily to p-nitrosophenol (/NO) by the reversible two-electron oxidation/reduction.…”

Section: Voltammetric Behavior Of Nitrophenol Isomers At Nano-au/gcesupporting

confidence: 90%

“…However, the formed peak sequences in our works are different from the literature [19]. On the voltammetric curve, from negative to positive, the arrangements of redox couples are m-, p-, and o-nitrophenol (see Fig.…”

Section: Voltammetric Behavior Of Nitrophenol Isomers At Nano-au/gcecontrasting

confidence: 85%

“…Compared with the carbon nanotube modified glassy carbon electrode by Luo [19], the proposed method to prepare the modified electrode is more convenient and controllable. The o-, m-, and p-nitrophenol were separated entirely at the nano-gold modified glassy carbon electrode with wide linear range and high selectivity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrochemical simultaneous determination of nitrophenol isomers at nano-gold modified glassy carbon electrode

2011

View full text Add to dashboard Cite

A novel method for simultaneous determination of nitrophenol isomers at nano-gold modified glassy carbon electrode has been developed. The gold nanoparticles were directly electrodeposited onto the glassy carbon electrode via a constant potential -0.2 V (vs. SCE) for 60 s from 0.1 mol L -1 KNO 3 containing 0.4 g L -1 HAuCl 4 . The resulting electrode (nano-Au/GCE) was characterized with scanning electron microscopy (SEM). The electrochemistry response of nitrophenol isomers at the nano-Au/GCE was studied. The result indicated that o-, m-, and p-nitrophenol are separated entirely at nano-Au/GCE, and a semi-derivative voltammetric technology was adopted to enhance the determination sensitivity. This modified electrode could be applied to direct simultaneous voltammetric determination of nitrophenol isomers in water samples without preseparation with higher sensitivity.

show abstract

Section: Voltammetric Behavior Of Nitrophenol Isomers At Nano-au/gcesupporting

confidence: 90%

Section: Voltammetric Behavior Of Nitrophenol Isomers At Nano-au/gcecontrasting

confidence: 85%

See 1 more Smart Citation

Electrochemical simultaneous determination of nitrophenol isomers at nano-gold modified glassy carbon electrode

2011

View full text Add to dashboard Cite

show abstract

“…Due to the great advantages, e.g. simple operation, good selectivity and sensitivity, electrochemical methods [7][8][9][10][11][12][13][14][15][16][17][18] have received considerable attention in the determination of p-NP.…”

Section: Introductionmentioning

confidence: 99%

Selective Determination of p‐Nitrophenol Based on Its Unique Voltammetric Behavior on Nanoporous Gold

Liu

Zhang

et al. 2011

Electroanalysis

View full text Add to dashboard Cite

In this paper, an unsupported nanoporous gold (us-NPG) was applied as a novel electrochemical sensor material for the selective detection of p-nitrophenol (p-NP) among its isomers in acid solution based on the distinct cyclic voltammetric behavior. To ascertain the ascription of each peak in cyclic voltammograms (CVs) of three nitrophenol isomers (NPs) on the us-NPG, contrast voltammetric studies of NPs were conducted at an ultrathin NPG film supported on glassy carbon substrate (NPG/GC) and a well-defined Au(111) electrode, respectively. Effects of potential scan rate and rotation speed of the electrode on the redox reaction of NPs were investigated to further confirm the reaction mechanisms. Interestingly, unlike those obtained on NPG/GC and Au(111) electrodes, the CVs of both o-nitrophenol (o-NP) and m-nitrophenol (m-NP) on us-NPG presented a new pair of redox waves separated very well from the redox waves of p-NP, indicating an obviously different mechanism involved in the redox process. Based on the voltammetric behavior, trace level determination of p-NP can be achieved on us-NPG electrode in the presence of o-NP and m-NP. Thus, the fast electron transfer, high selectivity and good sensitivity make us-NPG act as an ideal electrochemical sensor material in the selective determination of p-NP in aqueous solutions.

show abstract

“…Simple and sensitive electrochemical methods for the detection of ultratrace levels of 2,4,6-trinitrotoluene on glassy carbon electrodes modified with MWCNT has been published. 17 More recently, the electrochemical reduction of nitrophenol isomers at a glassy carbon electrode modified with MWCNT, 18 the electrochemical reduction of nitrobenzene at MWCNT electrode, 19 and the voltammetric reduction of a 4-nitroimidazole derivative on a multiwalled MWCNT modified electrode 20 have been published. However, none of these studies have reported the effect of size and functionalization of nanotubes in the analytical response of the nitro derivative.…”

mentioning

confidence: 99%

Adsorptive stripping voltammetric determination of nitroimidazole derivative on multiwalled carbon nanotube modified electrodes: influence of size and functionalization of nanotubes

Jara‐Ulloa¹,

Cañete-Rosales²,

Núñez‐Vergara³

et al. 2011

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Derivative voltammetric direct simultaneous determination of nitrophenol isomers at a carbon nanotube modified electrode

Cited by 134 publications

References 31 publications

Electrochemical simultaneous determination of nitrophenol isomers at nano-gold modified glassy carbon electrode

Electrochemical simultaneous determination of nitrophenol isomers at nano-gold modified glassy carbon electrode

Selective Determination of p‐Nitrophenol Based on Its Unique Voltammetric Behavior on Nanoporous Gold

Adsorptive stripping voltammetric determination of nitroimidazole derivative on multiwalled carbon nanotube modified electrodes: influence of size and functionalization of nanotubes

Contact Info

Product

Resources

About