Simultaneous voltammetric determination of nitrophenol isomers at ordered mesoporous carbon modified electrode

Electrochemical determination of 4-nitrophenol using uniform nanoparticle film electrode of glass carbon fabricated facilely by square wave potential pulses

“…The values of m/n for peak α and β were calculated to be about 1.14 and 1.13, respectively, and close to 1.0, indicating that the proton number involved equals the electron transfer number in both electrochemical reactions. These results are agreed with those reported in literatures [8,11,19]. …”

“…Besides, as shown in Fig. 4 (A3-D3), lower SWPP frequencies As reported previously [11,19], the electrochemical redox 4-NP is proton-involved reactions. So the CV response on GC-UNFE should be closely to the solution pH.…”

“…A much smaller semi-circle at GC-UNFE than that at smooth GCE indicates the former owns a very smaller charge transfer resistance (R ct ), namely much higher rate of charge transfer at the electrode/solution interface. (A1-A3), the CV curves of 4-NP on both smooth GCE and GC-UNFEs exhibit a reduction peak α and a couple of redox peaks β/γ, which correspond to an irreversible four-electron reduction of 4-NP to 4-hydroxylaminophenol (4-HAP) and a reversible two-electron transfer between 4-HAP and 4-nitrosophenol (4-NSP), respectively, according to previous research work [11,19].…”

“…In this method, the electrode materials play a key role in improving the detection performances. Up to now, many kinds of active materials, including carbon nanomaterials [8][9][10][11][12][13][14][15][16], noble metal nanoparticles [17], inorganic salt/complex [18][19][20], ionic liquids (ILs) [21], organic compound/polymer [22][23] and composite [24][25][26][27], have been synthesized physically/chemically at first and then coated onto a solid substrate or dispersed into a conductive matrix to prepare the modified electrodes for the determination.…”

Simultaneous electrochemical determination of nitrophenol isomers with the polyfurfural film modified glassy carbon electrode

“…For example, these compounds would cause severe diseases e.g., methemoglobinemia, fervescence, headaches, drowsiness, nausea to human and animals [4][5][6][7]; and they are also hazardous to plants, for instance, 0.7 mmol L -1 of nitrophenol in irrigating water will result in the reduction of output [8]. Moreover, nitrophenol isomers are widely applied in the chemical synthesis of dyes, pesticides, and explosive materials [8][9][10], and they are not only detected in soil, but also in aquatic environment due to their high stability and solubility in water [10][11][12][13]. These isomers, however, always coexist and interfere with each other due to similar structures and properties.…”