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Pregled bibliografske jedinice broj: 1219792

Breakdown of the anodized nanostructured anatase for photovoltaic devices: The effect of water content in the electrolyte on preparation of large surfaces of nanotubes


Mandić, Vilko; Panžić, Ivana; Kraljić Roković, Marijana; Gaboardi, Mattia
Breakdown of the anodized nanostructured anatase for photovoltaic devices: The effect of water content in the electrolyte on preparation of large surfaces of nanotubes // Ceramics international (2022) doi:10.1016/j.ceramint.2022.07.254 (znanstveni, online first)


CROSBI ID: 1219792 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Breakdown of the anodized nanostructured anatase for photovoltaic devices: The effect of water content in the electrolyte on preparation of large surfaces of nanotubes

Autori
Mandić, Vilko ; Panžić, Ivana ; Kraljić Roković, Marijana ; Gaboardi, Mattia

Vrsta, podvrsta
Radovi u časopisima, znanstveni

Izvornik
Ceramics international (2022)

Status rada
Online first

Ključne riječi
photovoltaic constituents ; nanostructured thin-films ; anatase-rutile-nanotubes ; vertically aligned ordered array ; anodization ; electrolyte ; synchrotron radiation

Sažetak
Many researchers are heavily involved in attempts to optimise the course of the electrochemical anodization for preparing nanostructured anatase thin-films. Particularly challenging is to prepare vertically aligned arrays of ordered nanotubes of anatase for application in the photovoltaic (PV) systems which require preparing larger homogeneous crack-free surfaces without the need for pre- or post-treatments. Having previously optimised the anodization cell geometry and electrical settings, here we focus on the electrolyte contribution during the anodization, specifically water content. It was elucidated that the water content can influence the equilibrium and the mechanisms behind several competing processes responsible for the formation of nanotubes (NT): (i) titania formation, (ii) NT formation over intermediate titanium hexafluoride, and (iii) etching of the mentioned phases. We employed broad structural, microstructural, electrochemical, and spectroscopic characterisation tools to shed more light on the development of the system with respect to water presence. Namely, water presence built up conductivity of the electrolyte, and consequently allowed faster oxidation of Ti and subsequently faster etching. Water content increase also facilitated the dissolution of the titanium hexafluoride which is the only water- soluble phase in the system. At moderate water content, the synergy of these processes facilitated: (I) forming the initial titania protective layer (titania prevented short circuits and thus eliminated the need for pre-deposition of protective layers), (II) growth of NT (upgraded the charge transfer), and (III) diminishing the residual nanoformations at the surface of residual titanium oxide or hydroxide phases (fewer nanoformations at surface and fewer residues increased charge transfer and apparent transparency and thus eliminated the need for post-treatment). The highest water content promoted excessive oxidation/etching where first NT with expanded tip were formed (crown-like NT), and then wormholes arose. Similarly, disproportioning in dissolution/oxidation/etching occurred at the lowest water contents resulted in less perfect NTs. The bottlenecks of the whole anodization process were identified proving the feasibility of the compositionally novel preparing procedure for obtaining perfect NT. Specifically for the solar cell application, 12% of water in the electrolyte will facilitate growth of the large-scale crack-free TNTs, with other parameters constant. In the course of the investigation, it was evidenced electrolyte can be utilised as a useful tool for controlling anatase to rutile occurrence and vertical distribution.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti



POVEZANOST RADA


Projekti:
HRZZ-PZS-2019-02-1555 - Fotonaponska-geopolimerna fasada: uloga vode-kisika u naprednom sklapanju filmova kompozitnih materijala (PV-WALL) (Mandić, Vilko, HRZZ - 2019-02) ( POIROT)
HRZZ-UIP-2019-04-2367 - Fenomeni na površini tijekom priprave naprednih nanokompozita infiltracijom i funkcionalizacijom poroznih materijala (SLIPPERYSLOPE) (Mandić, Vilko, HRZZ - 2019-04) ( POIROT)
EK-EFRR-KK.01.2.1.02.0316 - Razvoj tehničkog rješenja za uštedu energije upotrebom VIS propusnih ili polupropusnih i IC-reflektivnih tankih slojeva (Mandić, Vilko, EK - KK.01.2.1.02) ( POIROT)

Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb

Poveznice na cjeloviti tekst rada:

doi dx.doi.org www.sciencedirect.com

Citiraj ovu publikaciju:

Mandić, Vilko; Panžić, Ivana; Kraljić Roković, Marijana; Gaboardi, Mattia
Breakdown of the anodized nanostructured anatase for photovoltaic devices: The effect of water content in the electrolyte on preparation of large surfaces of nanotubes // Ceramics international (2022) doi:10.1016/j.ceramint.2022.07.254 (znanstveni, online first)
Mandić, V., Panžić, I., Kraljić Roković, M. & Gaboardi, M. (2022) Breakdown of the anodized nanostructured anatase for photovoltaic devices: The effect of water content in the electrolyte on preparation of large surfaces of nanotubes. Prihvaćen za objavljivanje u Ceramics international. [Preprint] doi:10.1016/j.ceramint.2022.07.254.
@unknown{unknown, author = {Mandi\'{c}, Vilko and Pan\v{z}i\'{c}, Ivana and Kralji\'{c} Rokovi\'{c}, Marijana and Gaboardi, Mattia}, year = {2022}, DOI = {10.1016/j.ceramint.2022.07.254}, keywords = {photovoltaic constituents, nanostructured thin-films, anatase-rutile-nanotubes, vertically aligned ordered array, anodization, electrolyte, synchrotron radiation}, journal = {Ceramics international}, doi = {10.1016/j.ceramint.2022.07.254}, title = {Breakdown of the anodized nanostructured anatase for photovoltaic devices: The effect of water content in the electrolyte on preparation of large surfaces of nanotubes}, keyword = {photovoltaic constituents, nanostructured thin-films, anatase-rutile-nanotubes, vertically aligned ordered array, anodization, electrolyte, synchrotron radiation} }
@unknown{unknown, author = {Mandi\'{c}, Vilko and Pan\v{z}i\'{c}, Ivana and Kralji\'{c} Rokovi\'{c}, Marijana and Gaboardi, Mattia}, year = {2022}, DOI = {10.1016/j.ceramint.2022.07.254}, keywords = {photovoltaic constituents, nanostructured thin-films, anatase-rutile-nanotubes, vertically aligned ordered array, anodization, electrolyte, synchrotron radiation}, journal = {Ceramics international}, doi = {10.1016/j.ceramint.2022.07.254}, title = {Breakdown of the anodized nanostructured anatase for photovoltaic devices: The effect of water content in the electrolyte on preparation of large surfaces of nanotubes}, keyword = {photovoltaic constituents, nanostructured thin-films, anatase-rutile-nanotubes, vertically aligned ordered array, anodization, electrolyte, synchrotron radiation} }

Časopis indeksira:


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


Citati:





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