Effect of Fe3+ ion doping on photocatalytic ability of nanozirconia ceramic to degrade 2, 4, 6- trichlorophenol

Carević, Milica; Savić, Tatjana D.; Abazović, Nadica D.; Mojović, Miloš; Novaković, Tatjana; Čomor, Mirjana I.

doi:10.1016/j.ceramint.2019.11.175

Cited by 10 publications

(8 citation statements)

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“…The n value in above equations takes value 1 under condition that medium is non-complexing, proton-promoted dissolution is small and all dissolved iron is in Fe 2+ form. (2) According to the results of characterization 25 Fe ions were incorporated into the ZrO 2 matrix, in both crystalline phases and on the surface and in the bulk of nanoparticles. Also, in the sample with highest Fe 3+ concentration, hematite can be detected.…”

Section: Results and Discussion Electrochemical Behavior Of Zirconia mentioning

confidence: 99%

“…Solvothermal synthesis of pure and iron doped zirconium oxide nanopowders is presented elsewere 25 . Shortly, appropriate amounts of iron (III) acetylacetonate and zirconium O n L i n e F i r s t propoxide (70%) were mixed in acidic medium in a Teflon vessel and stirred vigorously in ice bath.…”

Section: Methodsmentioning

confidence: 99%

“…The obtained powders were washed, dried weight and annealed at 600 °C for 3 h. Samples were denoted according to stoichiometric quantities of Fe ions, as ZrO2, 1-ZrO2, 5-ZrO2, 10-ZrO2 and 20-ZrO2 (for 0, 1, 5, 10 and 20 wt.% of iron ions, respectively). The results of detailed characterization are presented elsewhere 25 .…”

Section: Methodsmentioning

confidence: 99%

“…The only exception was sample 5-ZrO 2 that had charge transfer resistance almost equal to the starting material. The possible explanation might be the partial formation of zirconium ferrite, leaving much fewer Fe 3+ ions for doping of zirconia matrix 25 . The admittance is proportional to the surface area involved in the electrochemical reaction 29 .…”

Section: O N L I N E F I R S Tmentioning

confidence: 99%

“…Various approaches have been developed to shift its spectral response towards visible part of the spectrum, and among these, doping of zirconia matrix with transition metal ions is common strategy. In our previous study 25 we have presented synthesis and detailed characterization of series of iron doped zirconia samples (from 1 up to 20 wt.% of Fe 3+ ). Lower iron concentrations stabilized tetragonal crystal phase of zirconia, while for the highest dopant concentration (20 wt.%), beside tetragonal zirconia, hematite is also formed.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical oxidation of 2,4,6-trichlorophenol on iron-doped nanozirconia ceramic

Abazovic

Savić

Novaković

et al. 2021

JSCS

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Solvothermaly synthesized zirconium oxide nanopowders, pure and doped with various amounts of iron ions (1 - 20 %), were used as modifiers of glassy carbon electrode. The modified electrodes were tested in the reaction of electrochemical oxidation of 2,4,6-trichlorophenol (TCP) in order to investigate the influence of doping on electrochemical performance of zirconia matrix. The techniques of cyclic voltammetry and electrochemical impedance spectroscopy were employed. Cyclic voltammetry showed that electrooxidation of TCP proceeded through oxidation of hydroxyl group. Possible pathway included formation of quinones and formation of polyphenol film on the electrode surface leading to the electrode fouling. Iron doping enhanced the activity of zirconia matrix towards TCP electrooxidation. Electrochemical impedance spectroscopy showed the importance of iron content in zirconia matrix for preferable pathway of TCP electrooxidation. Quinone formation pathway was favored by low iron doped zirconia (doped with 1% of iron), while polyphenol film formation on the electrode surface was more pronounced at samples with higher iron ion content (for doping with 10 and 20 % of iron). The sample with 5 % of added iron ions, showed intermediate behavior where formed polyphenol film showed slight degradation.

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Section: Results and Discussion Electrochemical Behavior Of Zirconia mentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: O N L I N E F I R S Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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