Zeolite-containing photocatalysts immobilized on aluminum support by plasma electrolytic oxidation

Mojsilović, Kristina; Božović, Nikola; Stojanović, Srna; Damjanović-Vasilić, Ljiljana; Serdechnova, Maria; Blawert, Carsten; Zheludkevich, Mikhail L.; Stojadinović, Stevan; Vasilić, Rastko

doi:10.1016/j.surfin.2021.101307

Cited by 12 publications

(9 citation statements)

References 55 publications

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“…Diffraction maxima originating from pure and Ce-exchanged zeolites are not present in the XRD patterns in Figure 2a,b, most probably as a result of their low concentration or good dispersion in the obtained PEO coatings. Interestingly, the amorphous phase that was detected for a similar system was not present in the obtained coatings [22].…”

Section: Morphologies and Chemical And Phase Compositions Of Peo Coatingsmentioning

confidence: 83%

“…Figure 1 undoubtedly shows that the addition of particles to the supporting electrolytes decreases the break down voltage, but does not change the overall shape of the voltage-time curve, suggesting that the deposition mechanism remains the same. The decrease of the breakdown voltage is related to an increase in electrical conductivity of the electrolyte caused by the addition of the zeolites [13,22].…”

Section: Resultsmentioning

confidence: 99%

“…Further reaction can lead to the formation of hydrogen peroxide, which leads to the formation of • OH radicals. In addition, the holes react with H 2 O to generate • OH radicals [22,31]. Oxidative degradation of azo dyes generally occurs via the subsequent attacks of • OH radicals [32].…”

Section: Photocatalytic Activity Of Peo Coatingsmentioning

confidence: 99%

“…Despite the fact that there are published studies of composite coatings with zeolites immobilized by PEO [20,21], these have mostly focused on enhancing the corrosion properties of the obtained coatings. In contrast to our recently published paper [22] that also investigated composite coatings with zeolites, we decided to perform continuous DC PEO processing aiming at achieving higher surface roughness and porosity, which promote the photocatalytic and photoluminescent properties of the obtained coatings. Additionally, the selection of sodium tungstate electrolyte was made because it has been shown that PEO processing in such electrolyte results in the decrease of the breakdown voltage and production of thinner PEO coatings with better photocatalytic properties [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Formation and Properties of Oxide Coatings with Immobilized Zeolites Obtained by Plasma Electrolytic Oxidation of Aluminum

Mojsilović

Lačnjevac

Stojanović

et al. 2021

Metals

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In this paper, we employed plasma electrolytic oxidation (PEO) of aluminum in a water solution of sodium tungstate (Na2WO4∙2H2O) with the addition of the pure and Ce-loaded zeolites clinoptilolite and 13 X for the preparation of oxide coatings. The obtained coatings were characterized with respect to their morphologies and chemical and phase compositions using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, atomic force microscopy, and X-ray diffraction. The prepared coatings contained γ-alumina, WO3, and metallic tungsten. The surface morphologies of the obtained coatings strongly depended on the PEO processing time; the roughness of all coatings increased with PEO time, while porosity decreased with PEO processing time as a result of microdischarge coalescence and growth. All coatings contained elements originating from the substrate and from the electrolytes. Coatings containing zeolites with Ce showed higher photoactivity than those with immobilized pure zeolites. The highest photocatalytic activity levels were observed for coatings containing immobilized Ce-exchanged clinoptilolite processed for 10 min. It was observed that both clinoptilolite and 13X zeolites improved the features of the PEO coatings in a similar manner, making natural and abundant clinoptilolite an excellent candidate for various applications.

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Section: Morphologies and Chemical And Phase Compositions Of Peo Coatingsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Photocatalytic Activity Of Peo Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Formation and Properties of Oxide Coatings with Immobilized Zeolites Obtained by Plasma Electrolytic Oxidation of Aluminum

Mojsilović

Lačnjevac

Stojanović

et al. 2021

Metals

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“…13 Our recent study has shown that incorporation of both natural and synthetic zeolites loaded with Ce can enhance the photocatalytic properties of PEO coatings obtained under ultra-low duty cycle conditions on aluminum substrate. 14 However, the amount of Ce with which the synthetic zeolite 13X was loaded was rather high (about 30 wt. %) which is an obstacle for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Oxide coatings with immobilized Ce-ZSM5 as visible light photocatalysts

et al. 2022

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The preparation and properties of oxide coatings with immobilized ZSM-5 zeolite obtained by plasma electrolytic oxidation on aluminum support are investigated and discussed. Pure and Ce-exchanged ZSM-5 are immobilized on aluminum support from silicate-based electrolyte in ultra-low duty cycle pulsed direct current conditions. Obtained composite coatings are characterized with respect to their morphology, phase and chemical composition, as well as photocatalytic activity and anti-corrosion properties. All mentioned properties of obtained coatings are dependent on processing time. Coatings with Ce-exchanged ZSM-5 show higher photocatalytic activity and more effective corrosion protection than those with pure ZSM-5. The highest photocatalytic activity is observed for coatings processed for 30 minutes. It is suggested that surface morphology, Ce-content and number of defects influence the photocatalytic activity of composite coatings.

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The influence of electrolyte on photocatalytic activity of PEO coatings with incorporated Ce-ZSM5 formed on aluminum

Božović

Mojsilović

Stojanović

et al. 2023

J Solid State Electrochem

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Zeolite-containing photocatalysts immobilized on aluminum support by plasma electrolytic oxidation

Cited by 12 publications

References 55 publications

Formation and Properties of Oxide Coatings with Immobilized Zeolites Obtained by Plasma Electrolytic Oxidation of Aluminum

Formation and Properties of Oxide Coatings with Immobilized Zeolites Obtained by Plasma Electrolytic Oxidation of Aluminum

Oxide coatings with immobilized Ce-ZSM5 as visible light photocatalysts

The influence of electrolyte on photocatalytic activity of PEO coatings with incorporated Ce-ZSM5 formed on aluminum

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