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Pregled bibliografske jedinice broj: 674499

High-temperature hydrogenation of pure and silver- decorated titanate nanotubes to increase their solar absorbance for photocatalytic applications

Plodinec, Milivoj; Gajović, Andreja; Jakša, Gregor; Žagar, Kristina; Čeh, Miran
High-temperature hydrogenation of pure and silver- decorated titanate nanotubes to increase their solar absorbance for photocatalytic applications // Journal of alloys and compounds, 591 (2014), 147-155 doi:10.1016/j.jallcom.2013.12.179 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 674499 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
High-temperature hydrogenation of pure and silver- decorated titanate nanotubes to increase their solar absorbance for photocatalytic applications

Autori
Plodinec, Milivoj ; Gajović, Andreja ; Jakša, Gregor ; Žagar, Kristina ; Čeh, Miran

Izvornik
Journal of alloys and compounds (0925-8388) 591 (2014); 147-155

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

Ključne riječi
nanostructured oxide materials; chemical synthesis; photo-catalysis; TEM; X-ray diffraction

Sažetak
Titanate nanotubes (TiNTs) and silver-decorated titanate nanotubes (TiNTs@Ag) were synthesized using the hydrothermal method. In the decorated nanotubes the silver particles were obtained by the photoreduction of AgNO3 under UV light. Pure and Ag-decorated nanotubes were high-temperature heat treated at 550°C in a hydrogen atmosphere and the “core-shell”-structured TiO2 nanoparticles were formed. For the structural characterization of all the titanate nanostructures we used conventional and analytical transmission electron microscopy (TEM) techniques, X-ray diffraction (XRD) and Raman spectroscopy. The Ag-decorated titanate nanostructures were additionally studied by X-ray photo-electron spectroscopy (XPS), with the aim being to investigate the surface chemistry. Using UV-ViS-NIR spectroscopy we studied the photocatalytic activity on caffeine for the TiNT and TiNT@Ag samples that were high- temperature heat treated at 550°C in a hydrogen atmosphere. We found that hydrogenation at high temperature of the TiNTs and TiNTs@Ag is essential to increase the absorption of light in the visible and near-IR regions. In the case of the hydrogenated TiNTs@Ag the absorption is even stronger in the visible region than in the UV, which was not observed in TiO2-based nanostructures up until now, to the best of our knowledge. The hydrogenated TiNTs@Ag sample had a two-times higher photodegradation impact on the caffeine than the hydrogenated TiNT samples, which is a consequence of the increased absorption of visible light and the synergetic effects between the silver and the TiO2 nanoparticles that increase the efficiency of the formation of electron-hole pairs and the charge transfer to the surface of the nanoparticles.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA

Projekti:
O-367-2010
098-0982904-2898 - Fizika i primjena nanostruktura i volumne tvari (Ivanda, Mile, MZOS ) ( CroRIS)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Milivoj Plodinec (autor)

Avatar Url Andreja Gajović (autor)

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com

Citiraj ovu publikaciju:

Plodinec, Milivoj; Gajović, Andreja; Jakša, Gregor; Žagar, Kristina; Čeh, Miran
High-temperature hydrogenation of pure and silver- decorated titanate nanotubes to increase their solar absorbance for photocatalytic applications // Journal of alloys and compounds, 591 (2014), 147-155 doi:10.1016/j.jallcom.2013.12.179 (međunarodna recenzija, članak, znanstveni)
Plodinec, M., Gajović, A., Jakša, G., Žagar, K. & Čeh, M. (2014) High-temperature hydrogenation of pure and silver- decorated titanate nanotubes to increase their solar absorbance for photocatalytic applications. Journal of alloys and compounds, 591, 147-155 doi:10.1016/j.jallcom.2013.12.179.
@article{article, author = {Plodinec, Milivoj and Gajovi\'{c}, Andreja and Jak\v{s}a, Gregor and \v{Z}agar, Kristina and \v{C}eh, Miran}, year = {2014}, pages = {147-155}, DOI = {10.1016/j.jallcom.2013.12.179}, keywords = {nanostructured oxide materials, chemical synthesis, photo-catalysis, TEM, X-ray diffraction}, journal = {Journal of alloys and compounds}, doi = {10.1016/j.jallcom.2013.12.179}, volume = {591}, issn = {0925-8388}, title = {High-temperature hydrogenation of pure and silver- decorated titanate nanotubes to increase their solar absorbance for photocatalytic applications}, keyword = {nanostructured oxide materials, chemical synthesis, photo-catalysis, TEM, X-ray diffraction} }
@article{article, author = {Plodinec, Milivoj and Gajovi\'{c}, Andreja and Jak\v{s}a, Gregor and \v{Z}agar, Kristina and \v{C}eh, Miran}, year = {2014}, pages = {147-155}, DOI = {10.1016/j.jallcom.2013.12.179}, keywords = {nanostructured oxide materials, chemical synthesis, photo-catalysis, TEM, X-ray diffraction}, journal = {Journal of alloys and compounds}, doi = {10.1016/j.jallcom.2013.12.179}, volume = {591}, issn = {0925-8388}, title = {High-temperature hydrogenation of pure and silver- decorated titanate nanotubes to increase their solar absorbance for photocatalytic applications}, keyword = {nanostructured oxide materials, chemical synthesis, photo-catalysis, TEM, X-ray diffraction} }

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

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