Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1695023 | Applied Clay Science | 2013 | 7 Pages |
•HDTMA, DDTMA and TMA bentonites were tested in the electrooxidation of p-NP.•TMA-bentonite proved to be the best electrode material among the tested organobentonites.•The influence of TMA loading in organobentonite was investigated.•The highest signal toward p-NP was obtained for 0.2 TMA-B (TMA loading equal to 20% of CEC).
A natural bentonite, modified with different quaternary ammonium cations, hexadecyl trimethylammonium, (HDTMA), dodecyl trimethylammonium (DTMA) and tetramethylammonium (TMA), was used as an electrode material in a p-nitrophenol (p-NP) electrooxidation. On the basis of electrochemical response, TMA-modified bentonite (TMA-B) electrode was chosen for further investigations. The influence of TMA loading on the electrochemical properties of the TMA-B electrodes toward p-NP electrooxidation was examined. Electrode sensitivity toward p-NP was performed. The detection limit for p-NP of 1 · 10− 6 mol dm− 3 was obtained.