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Pregled bibliografske jedinice broj: 1007723

Effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of alpha-FeOOH and alpha-Fe2O3 1D nanoparticles


Krehula, Stjepko; Ristić, Mira; Petrović, Željka; Kratofil Krehula, Ljerka; Mitar, Ivana; Musić, Svetozar
Effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of alpha-FeOOH and alpha-Fe2O3 1D nanoparticles // Journal of alloys and compounds, 802 (2019), 290-300 doi:10.1016/j.jallcom.2019.06.133 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 1007723 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of alpha-FeOOH and alpha-Fe2O3 1D nanoparticles

Autori
Krehula, Stjepko ; Ristić, Mira ; Petrović, Željka ; Kratofil Krehula, Ljerka ; Mitar, Ivana ; Musić, Svetozar

Izvornik
Journal of alloys and compounds (0925-8388) 802 (2019); 290-300

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

Ključne riječi
Goethite, Hematite ; Cu dopant ; Nanoneedles Photocatalysts ; Mössbauer spectroscopy

Sažetak
Nanostructural morphology and cation (divalent or tetravalent) doping are known to be important factors for photocatalytic and photoelectrochemical activities of iron oxides. Modifications of iron oxides in an appropriate way could significantly improve these activities. In the present work the effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of goethite (a-FeOOH) and hematite (a-Fe2O3) 1D nanoparticles were investigated. Goethite and Cu-doped goethite 1D nano-particles were synthesized by precipitation in a highly alkaline medium. Hematite and Cu-doped hematite 1D nanoparticles were prepared by calcination of goethite samples at 500 C. Cu2+- for-Fe3+ substitution in goethite and hematite was confirmed by determining the change in unit cell size using X-ray powder diffraction and by measuring the hyperfine magnetic field reduction using Moessbauer spectroscopy. An increased Cu2+-for-Fe3+ substitution in goethite caused a gradual elongation and narrowing of nanorods with the formation of nanoneedles at 3 or 4 mol% Cu. The shape and size of nanoparticles were not changed by thermal transformation of goethite to hematite. Thermal analysis showed a lower temperature of goethite dehydroxylation upon increased Cu doping. Cu2+-for-Fe3+ substitution in goethite and hematite caused increased absorption of visible and near-IR radiation beyond the absorption edge, as well as a slight decrease in direct and indirect optical band gaps compared with pure phases. The visible light photocatalytic activities of Cu-doped goethite and hematite nanoneedles were significantly improved compared with undoped goethite and hematite nanorods, which could be attributed to a combined effect of nanoneedle morphology and Cu doping.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
HRZZ-IP-2016-06-8254 - Nastajanje i svojstva 1D a-Fe2O3 nanostruktura dopiranih odabranim metalnim ionima (1D-DopedFeOX) (Ristić, Mira, HRZZ - 2016-06) ( POIROT)
EK-EFRR-KK.01.1.1.01.0001 - Potpora vrhunskim istraživanjima Centra izvrsnosti za napredne materijale i senzore (Ivanda, Mile; Jakšić, Milko; Stipčević, Mario; Kralj, Marko, EK - KK.01.1.1.01) ( POIROT)

Ustanove:
Institut "Ruđer Bošković", Zagreb,
Fakultet kemijskog inženjerstva i tehnologije, Zagreb,
Prirodoslovno-matematički fakultet, Split

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com

Citiraj ovu publikaciju:

Krehula, Stjepko; Ristić, Mira; Petrović, Željka; Kratofil Krehula, Ljerka; Mitar, Ivana; Musić, Svetozar
Effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of alpha-FeOOH and alpha-Fe2O3 1D nanoparticles // Journal of alloys and compounds, 802 (2019), 290-300 doi:10.1016/j.jallcom.2019.06.133 (međunarodna recenzija, članak, znanstveni)
Krehula, S., Ristić, M., Petrović, Ž., Kratofil Krehula, L., Mitar, I. & Musić, S. (2019) Effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of alpha-FeOOH and alpha-Fe2O3 1D nanoparticles. Journal of alloys and compounds, 802, 290-300 doi:10.1016/j.jallcom.2019.06.133.
@article{article, year = {2019}, pages = {290-300}, DOI = {10.1016/j.jallcom.2019.06.133}, keywords = {Goethite, Hematite, Cu dopant, Nanoneedles Photocatalysts, M\"{o}ssbauer spectroscopy}, journal = {Journal of alloys and compounds}, doi = {10.1016/j.jallcom.2019.06.133}, volume = {802}, issn = {0925-8388}, title = {Effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of alpha-FeOOH and alpha-Fe2O3 1D nanoparticles}, keyword = {Goethite, Hematite, Cu dopant, Nanoneedles Photocatalysts, M\"{o}ssbauer spectroscopy} }
@article{article, year = {2019}, pages = {290-300}, DOI = {10.1016/j.jallcom.2019.06.133}, keywords = {Goethite, Hematite, Cu dopant, Nanoneedles Photocatalysts, M\"{o}ssbauer spectroscopy}, journal = {Journal of alloys and compounds}, doi = {10.1016/j.jallcom.2019.06.133}, volume = {802}, issn = {0925-8388}, title = {Effects of Cu doping on the microstructural, thermal, optical and photocatalytic properties of alpha-FeOOH and alpha-Fe2O3 1D nanoparticles}, keyword = {Goethite, Hematite, Cu dopant, Nanoneedles Photocatalysts, M\"{o}ssbauer spectroscopy} }

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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