Nebojša Potkonjak

ORCID: 0000-0002-7390-1470
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About
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Research Areas
  • Electrochemical Analysis and Applications
  • Electrocatalysts for Energy Conversion
  • Adsorption and biosorption for pollutant removal
  • Fuel Cells and Related Materials
  • Electrochemical sensors and biosensors
  • Phytochemicals and Antioxidant Activities
  • Hydrogen Storage and Materials
  • Analytical Chemistry and Sensors
  • Spectroscopy and Chemometric Analyses
  • Nanomaterials for catalytic reactions
  • Pesticide and Herbicide Environmental Studies
  • Spectroscopy and Quantum Chemical Studies
  • Solid-state spectroscopy and crystallography
  • Pesticide Exposure and Toxicity
  • Electrodeposition and Electroless Coatings
  • Iron oxide chemistry and applications
  • Nonlinear Dynamics and Pattern Formation
  • Arsenic contamination and mitigation
  • Fermentation and Sensory Analysis
  • Free Radicals and Antioxidants
  • Molecular Junctions and Nanostructures
  • Identification and Quantification in Food
  • Recycling and utilization of industrial and municipal waste in materials production
  • Freezing and Crystallization Processes
  • Bee Products Chemical Analysis

University of Belgrade
2012-2025

Vinča Institute of Nuclear Sciences
2012-2022

Kompetenzzentrum Holz
2022

Institute of General and Physical Chemistry
2005-2011

The increase of production and consumption persistently introduce different pollutants into the environment. constant development improvement analytical methods for tracking environmental contaminants are essential. demand high sample throughput analysis has hit spotlight developing selective sensors to avoid time-consuming preparation techniques. In addition, sensor’s sensitivity should satisfy rigorous demands harmful compound tracking. Molecularly imprinted plasmonic-based excellent...

10.3390/chemosensors11010035 article EN cc-by Chemosensors 2023-01-02

This study investigates the effects of ultrasound, in combination with chemical pretreatments, on quality attributes (total phenolic and carotenoid content, antioxidant activity (2,2-Diphenyl-1-picrylhydrazyl assay (DPPH)), ferric-reducing ability (FRAP), CIE L* a* b* color, non-enzymatic browning, rehydration ratio, textural morphological properties) red pepper subjected to drying (hot air or freeze drying). The fractional factorial design was used assess impact factors. global Derringer...

10.3390/foods12132468 article EN cc-by Foods 2023-06-23

Metals are integral components of the natural environment, and their presence in food supply is inevitable complex. While essential metals such as sodium, potassium, magnesium, calcium, iron, zinc, copper crucial for various physiological functions must be consumed through diet, others, like lead, mercury, cadmium, toxic even at low concentrations pose serious health risks. This study comprehensively analyzes presence, importance, consequences chain. We explore pathways which enter supply,...

10.3390/foods13121890 article EN cc-by Foods 2024-06-16

A novel antioxidative assay based on direct current polarography has been developed. Quantification of (AO) activity a decrease hydrogen peroxide anodic in the presence antioxidants. An efficient experimental procedure, without any special pretreatment analyzed samples, applied. Antioxidative different kinds commercial beers (dark, blond, and alcohol-free), some small-scale made with medicinal herbs mushroom extracts, extracts themselves, as well individual phenolic components present beer...

10.1021/jf903091n article EN Journal of Agricultural and Food Chemistry 2009-12-16

Antioxidant (AO) activity of various red and white wines different origin as well some individual phenolic compounds present in wine has been assessed using a polarographic assay. Direct current polarography used to survey hydrogen peroxide scavenge (HPS) upon gradual addition tested samples. Results expressed reciprocal value volume required for 50% decrease anodic limiting have validated through correlation with Folin−Ciocalteau DPPH assays. All exhibit HPS analogous total content...

10.1021/jf100022e article EN Journal of Agricultural and Food Chemistry 2010-03-21

This study presents an analysis of films which consist two layers; one layer is PVDF as the matrix, along with fillers BaTiO3 (BT), and second bacterial nanocellulose (BNC) filled Fe3O4. The mass fraction BT in was 5%, samples were differentiated based on duration mechanical activation BT. innovative laminate polymer environmentally friendly aligns concept circular usage, resulting a reduction plastic content potential improvement piezoelectric properties entire composite. work new,...

10.3390/polym16081033 article EN Polymers 2024-04-10

Abstract The behavior of chlorogenic acid (CGA) and its interaction with Hg(II), Pb(II), Cu(II), Cd(II) Zn(II) has been studied using direct current (DC) differential‐pulse polarography (DPP). Adsorptive kinetic/catalytic anodic waves CGA have detected at −0.02 −0.18 V vs. SCE, respectively; Hg(I)‐CGA surface disproportionation assumed. Reduction Hg(II)‐ions, added in the buffered solution (pH 7.5), occurs rather than complexation, while complex forming ability towards Pb(II) Cu(II)...

10.1002/elan.201100476 article EN Electroanalysis 2011-11-29

Porous anorthite (CaAl2Si2O8) ceramics, suitable for thermal insulation in buildings, were obtained using waste seashells as a source of CaO, kaolin Al2O3 and SiO2 banana peel pore former. Changing the volume well processing temperature was found to be an effective approach control thermo-mechanical properties ceramics. The sintering powder compacts containing up 30 wt% at temperatures ranging from 1100 1200 °C resulted ceramics possessing 45% open porosity, compressive strength between 13...

10.3390/ma17071478 article EN Materials 2024-03-24

With growing concerns regarding environmental pollution and the need for sustainable waste management practices, this study investigates potential of utilizing spent coffee grounds (SCG) as a precursor producing functional carbon materials aimed at organophosphorus pesticide remediation under environmentally relevant conditions. Carbonization SCG is followed by various activation methods, including treatment with potassium hydroxide, phosphoric acid, dioxide, individually or in combination....

10.3390/ma17225499 article EN Materials 2024-11-11

The Briggs–Rauscher reaction containing malonic acid may undergo a sudden transition from low (state I) to high iodide and iodine II) concentration states after well-defined strongly reproducible oscillatory period. This study clearly shows that even though the time-dependent behavior of state is reproducible, time lag necessary for appearance I II system leaves becomes irreproducible an individual kinetic run. crazy clock identified by repeated experiments in which stirring rate taken as...

10.1021/acs.jpca.7b11774 article EN The Journal of Physical Chemistry A 2017-12-19

Abstract The influence of hydroxycinnamic acids (HCA) on the oxy-radical generated system, potassium iodide/hydrogen peroxide, was investigated through enhancement triiodide (I3−) yield. Caffeic acid, chlorogenic and p-coumaric acid were used as typical representatives HCA. A linear correlation, with positive slopes, found between absorption maximum I3− at 351 nm HCA concentration in all cases. magnitude enhanced production to increase following order: < ≤ caffeic acid. reaction...

10.1246/bcsj.20140175 article EN Bulletin of the Chemical Society of Japan 2014-11-01

This work presents the current oscillation phenomena observed in an electrochemical Cu/0.5 M CF3COOH system. The dynamical response of this new oscillator was followed by both density-potential (j-E) and density-time (j-t) curves. investigated system were monitored over various potential scan rates constant applied potentials as control parameters. increase rate significantly decreases range oscillations frequency oscillations. At j-t curves simple complex (period adding) found. Moreover,...

10.4028/www.scientific.net/msf.518.301 article EN Materials science forum 2006-07-01

The extensive use of pesticides requires innovative approaches to remove these compounds from the environment. Carbon materials are traditionally used as adsorbents for removing pesticides, and development new sorts carbon allows more advanced in environmental applications. Using density functional calculations, we have predicted chemical reaction between S(O)=P moieties organophosphates with point defects graphene ? single vacancies, Stone?Wales epoxy- -groups. was confirmed using ultra...

10.2298/jsc210108012a article EN cc-by Journal of the Serbian Chemical Society 2021-01-01
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