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Pregled bibliografske jedinice broj: 697709

Inhibition of copper corrosion in chloride solution by caffeine isolated from black tea


Gudić, Senka; Oguzie, E. Emeka; Radonić, Ani; Vrsalović, Ladislav; Smoljko, Ivana; Kliškić, Maja
Inhibition of copper corrosion in chloride solution by caffeine isolated from black tea // Macedonian Journal of Chemistry and Chemical Enginee ring, 33 (2014), 1; 13-25 doi:MJCCA9 – 633 (međunarodna recenzija, članak, znanstveni)


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Naslov
Inhibition of copper corrosion in chloride solution by caffeine isolated from black tea

Autori
Gudić, Senka ; Oguzie, E. Emeka ; Radonić, Ani ; Vrsalović, Ladislav ; Smoljko, Ivana ; Kliškić, Maja

Izvornik
Macedonian Journal of Chemistry and Chemical Enginee ring (1857-5552) 33 (2014), 1; 13-25

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Adsorption isotherm; Caffeine; Copper; Corrosion; Inhibition

Sažetak
Caffeine (1, 3, 7-trimethylxanthine) was isolated from black tea and characterised using different physical methods (determination of melting point, thin layer chromatography, FTIR spectroscopy and UV spectrophotometry). The corrosion inhibition performance of the caffeine isolate on copper corrosion in neutral 0.5 mol L-1 NaCl solution was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy measurements. The obtained results show that caffeine effectively inhibited the corrosion reaction in the chloride solution with an inhibition efficiency of up to  92%. Furthermore, caffeine was found to function essentially as a cathodic inhibitor by adsorption on the copper surface according to the Langmuir adsorption isotherm. The adsorption free energy of  –37 kJ mol-1 indicates strong adsorption of the caffeine on the metal surface. Quantum chemical computations and molecular dynamics simulations were adapted to understudy the adsorption of a single caffeine molecule as well as a polymeric cluster of caffeine molecules on a model Cu surface at a molecular level and was consistent with the experimental findings.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo



POVEZANOST RADA


Ustanove
Kemijsko-tehnološki fakultet, Split

Profili:

Avatar Url Maja Kliškić (autor)

Avatar Url Senka Gudić (autor)

Avatar Url Ani Radonić (autor)

Avatar Url Ivana Smoljko (autor)

Avatar Url Ladislav Vrsalović (autor)

Citiraj ovu publikaciju

Gudić, Senka; Oguzie, E. Emeka; Radonić, Ani; Vrsalović, Ladislav; Smoljko, Ivana; Kliškić, Maja
Inhibition of copper corrosion in chloride solution by caffeine isolated from black tea // Macedonian Journal of Chemistry and Chemical Enginee ring, 33 (2014), 1; 13-25 doi:MJCCA9 – 633 (međunarodna recenzija, članak, znanstveni)
Gudić, S., Oguzie, E., Radonić, A., Vrsalović, L., Smoljko, I. & Kliškić, M. (2014) Inhibition of copper corrosion in chloride solution by caffeine isolated from black tea. Macedonian Journal of Chemistry and Chemical Enginee ring, 33 (1), 13-25 doi:MJCCA9 – 633.
@article{article, year = {2014}, pages = {13-25}, DOI = {MJCCA9 – 633}, keywords = {Adsorption isotherm, Caffeine, Copper, Corrosion, Inhibition}, journal = {Macedonian Journal of Chemistry and Chemical Enginee ring}, doi = {MJCCA9 – 633}, volume = {33}, number = {1}, issn = {1857-5552}, title = {Inhibition of copper corrosion in chloride solution by caffeine isolated from black tea}, keyword = {Adsorption isotherm, Caffeine, Copper, Corrosion, Inhibition} }

Časopis indeksira:


  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI


Uključenost u ostale bibliografske baze podataka:


  • CA Search (Chemical Abstracts)
  • SCOPUS
  • Google Scholar
  • EBSCO
  • EVISA
  • DOAJ


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