P-nitrophenol electro-oxidation on a btma(+)-bentonite-modified electrode
Authorized Users Only
2012
Authors
Abu Rabi-Stanković, Andjela S.Milutinović Nikolić, Aleksandra

Jović-Jovičić, Nataša

Banković, Predrag

Žunić, Marija

Mojović, Zorica

Jovanović, Dušan M.
Article (Published version)

Metadata
Show full item recordAbstract
Phenol and its derivatives arc regarded as 'priority pollutants' and p-nitrophenol (p-NP), in particular, is of great interest due to its toxicity and frequent presence in waste waters and fresh waters. Straightforward, inexpensive methods to identify p-NP in water, however, is lacking. In the present study, an electrochemical technique using clay-modified electrodes to measure p-NP was investigated as a potentially promising method to fill that gap. A glassy carbon electrode (GCE) was modified with a thin layer of Na-enriched bentonite and a series of benzyltrimethylammonium (BTMA(+))-bentonites (BTMA(+)-B) in order to confirm these materials as p-NP electrosensitive. A series of organobentonites was synthesized using different BTMA(+)/bentonite ratios. The materials obtained were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, and a low-temperature nitrogen adsorption-desorption method. A monolayer arrangement of BTMA(+) within the interlamellar region... of beidellite-rich smectite was confirmed. Deterioration of the textural properties was observed with increase of BTMA(+). loading. The electro-oxidation of p-NP in an acidic medium on BTMA(+)-B-modified GCE was investigated. The cyclic voltammetry method with a three-electrode cell was used. The reference electrode was Ag/AgCl in 3 M KCl and a Pt foil was the counter electrode. For each electrochemical measurement, a different BTMA(+) loading in BTMA(+)-B was used as the material for GCE coating and applied as the working electrode. The electrochemical activity of BTMA(+)-B-based electrodes increased with BTMA(+) loading. The results confirmed that the organophylic character of the BTMA(+)-B-modified surface was the main influence on the electrochemical activity of the BTMA(+)-B-based GCE; the influence of textural properties was almost negligible. The increased electrode activity toward p-NP was achieved by the adsorption of p-NP on the electrode surface, the process that commonly precedes the electro-oxidation. The present study showed that synthesized materials could potentially be used in an electrochemical test for the presence of p-NP in water solutions.
Keywords:
BTMA(+)-bentonite / Cyclovoltammetry / Electrochemical Properties / Modified Electrode / Para-nitrophenol / Priority PollutantSource:
Clays and Clay Minerals, 2012, 60, 3, 291-299Publisher:
- Clay Minerals Soc, Chantilly
Funding / projects:
DOI: 10.1346/CCMN.2012.0600306
ISSN: 0009-8604
WoS: 000308834800006
Scopus: 2-s2.0-84866510589
Collections
Institution/Community
IHTMTY - JOUR AU - Abu Rabi-Stanković, Andjela S. AU - Milutinović Nikolić, Aleksandra AU - Jović-Jovičić, Nataša AU - Banković, Predrag AU - Žunić, Marija AU - Mojović, Zorica AU - Jovanović, Dušan M. PY - 2012 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1102 AB - Phenol and its derivatives arc regarded as 'priority pollutants' and p-nitrophenol (p-NP), in particular, is of great interest due to its toxicity and frequent presence in waste waters and fresh waters. Straightforward, inexpensive methods to identify p-NP in water, however, is lacking. In the present study, an electrochemical technique using clay-modified electrodes to measure p-NP was investigated as a potentially promising method to fill that gap. A glassy carbon electrode (GCE) was modified with a thin layer of Na-enriched bentonite and a series of benzyltrimethylammonium (BTMA(+))-bentonites (BTMA(+)-B) in order to confirm these materials as p-NP electrosensitive. A series of organobentonites was synthesized using different BTMA(+)/bentonite ratios. The materials obtained were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, and a low-temperature nitrogen adsorption-desorption method. A monolayer arrangement of BTMA(+) within the interlamellar region of beidellite-rich smectite was confirmed. Deterioration of the textural properties was observed with increase of BTMA(+). loading. The electro-oxidation of p-NP in an acidic medium on BTMA(+)-B-modified GCE was investigated. The cyclic voltammetry method with a three-electrode cell was used. The reference electrode was Ag/AgCl in 3 M KCl and a Pt foil was the counter electrode. For each electrochemical measurement, a different BTMA(+) loading in BTMA(+)-B was used as the material for GCE coating and applied as the working electrode. The electrochemical activity of BTMA(+)-B-based electrodes increased with BTMA(+) loading. The results confirmed that the organophylic character of the BTMA(+)-B-modified surface was the main influence on the electrochemical activity of the BTMA(+)-B-based GCE; the influence of textural properties was almost negligible. The increased electrode activity toward p-NP was achieved by the adsorption of p-NP on the electrode surface, the process that commonly precedes the electro-oxidation. The present study showed that synthesized materials could potentially be used in an electrochemical test for the presence of p-NP in water solutions. PB - Clay Minerals Soc, Chantilly T2 - Clays and Clay Minerals T1 - P-nitrophenol electro-oxidation on a btma(+)-bentonite-modified electrode VL - 60 IS - 3 SP - 291 EP - 299 DO - 10.1346/CCMN.2012.0600306 ER -
@article{ author = "Abu Rabi-Stanković, Andjela S. and Milutinović Nikolić, Aleksandra and Jović-Jovičić, Nataša and Banković, Predrag and Žunić, Marija and Mojović, Zorica and Jovanović, Dušan M.", year = "2012", abstract = "Phenol and its derivatives arc regarded as 'priority pollutants' and p-nitrophenol (p-NP), in particular, is of great interest due to its toxicity and frequent presence in waste waters and fresh waters. Straightforward, inexpensive methods to identify p-NP in water, however, is lacking. In the present study, an electrochemical technique using clay-modified electrodes to measure p-NP was investigated as a potentially promising method to fill that gap. A glassy carbon electrode (GCE) was modified with a thin layer of Na-enriched bentonite and a series of benzyltrimethylammonium (BTMA(+))-bentonites (BTMA(+)-B) in order to confirm these materials as p-NP electrosensitive. A series of organobentonites was synthesized using different BTMA(+)/bentonite ratios. The materials obtained were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, and a low-temperature nitrogen adsorption-desorption method. A monolayer arrangement of BTMA(+) within the interlamellar region of beidellite-rich smectite was confirmed. Deterioration of the textural properties was observed with increase of BTMA(+). loading. The electro-oxidation of p-NP in an acidic medium on BTMA(+)-B-modified GCE was investigated. The cyclic voltammetry method with a three-electrode cell was used. The reference electrode was Ag/AgCl in 3 M KCl and a Pt foil was the counter electrode. For each electrochemical measurement, a different BTMA(+) loading in BTMA(+)-B was used as the material for GCE coating and applied as the working electrode. The electrochemical activity of BTMA(+)-B-based electrodes increased with BTMA(+) loading. The results confirmed that the organophylic character of the BTMA(+)-B-modified surface was the main influence on the electrochemical activity of the BTMA(+)-B-based GCE; the influence of textural properties was almost negligible. The increased electrode activity toward p-NP was achieved by the adsorption of p-NP on the electrode surface, the process that commonly precedes the electro-oxidation. The present study showed that synthesized materials could potentially be used in an electrochemical test for the presence of p-NP in water solutions.", publisher = "Clay Minerals Soc, Chantilly", journal = "Clays and Clay Minerals", title = "P-nitrophenol electro-oxidation on a btma(+)-bentonite-modified electrode", volume = "60", number = "3", pages = "291-299", doi = "10.1346/CCMN.2012.0600306" }
Abu Rabi-Stanković, A. S., Milutinović Nikolić, A., Jović-Jovičić, N., Banković, P., Žunić, M., Mojović, Z.,& Jovanović, D. M.. (2012). P-nitrophenol electro-oxidation on a btma(+)-bentonite-modified electrode. in Clays and Clay Minerals Clay Minerals Soc, Chantilly., 60(3), 291-299. https://doi.org/10.1346/CCMN.2012.0600306
Abu Rabi-Stanković AS, Milutinović Nikolić A, Jović-Jovičić N, Banković P, Žunić M, Mojović Z, Jovanović DM. P-nitrophenol electro-oxidation on a btma(+)-bentonite-modified electrode. in Clays and Clay Minerals. 2012;60(3):291-299. doi:10.1346/CCMN.2012.0600306 .
Abu Rabi-Stanković, Andjela S., Milutinović Nikolić, Aleksandra, Jović-Jovičić, Nataša, Banković, Predrag, Žunić, Marija, Mojović, Zorica, Jovanović, Dušan M., "P-nitrophenol electro-oxidation on a btma(+)-bentonite-modified electrode" in Clays and Clay Minerals, 60, no. 3 (2012):291-299, https://doi.org/10.1346/CCMN.2012.0600306 . .