Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 273290

57^Fe Mössbauer, FT-IR and FE SEM investigation of the formation of hematite and goethite at high pH values


Žic, Mark; Ristić, Mira; Musić, Svetozar
57^Fe Mössbauer, FT-IR and FE SEM investigation of the formation of hematite and goethite at high pH values // Journal of Molecular Structure, 834-836 (2007), 141-149 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 273290 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
57^Fe Mössbauer, FT-IR and FE SEM investigation of the formation of hematite and goethite at high pH values

Autori
Žic, Mark ; Ristić, Mira ; Musić, Svetozar

Izvornik
Journal of Molecular Structure (0022-2860) 834-836 (2007); 141-149

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

Ključne riječi
ferrihydrite; alpha-Fe2O3; alpha-FeOOH; spectroscopy; FE SEM

Sažetak
The ferrihydrite suspensions were precipitated at high pH values, and crystallizations of alpha-Fe_2O_3 and alpha-FeOOH were monitored by Mössbauer and FT-IR spectroscopies and thermal field emission electron microscopy. alpha-Fe_2O_3 crystallization in dense ferrihydrite suspension at 160 o^C was a fast process governed by the dissolution/reprecipitation mechanism. Between 40 and 60 min of crystallization traces/small amounts of alpha-FeOOH precipitated and dissolved, so that between 6 and 24 h only platelet-like alpha-Fe_2O_3 particles were present. On the other hand, the kinetics of crystallization in a dense ferrihydrite suspension at RT was slow and upon 90 days of ageing alpha-FeOOH an end-product was detected. These alpha-FeOOH particles were strongly elongated along the crystallographic c-axis. alpha-FeOOH particles were also obtained as a single phase at 160 o^C, but with decreased Fe^3+ concentrations (0.1 or 0.05 M FeCl_3). These particles also showed a strong lateral aggregation and the formation of a dendritic microstructure. The crystallization process in a dense ferrihydrite suspension was strongly influenced by ultrasound energy. The application of ultrasound energy of 141 W cm^-2 for 2 h induced a coalescence-like effect in the ferrihydrite suspension, as observed by FE SEM. With ultrasound energy increased up to 424 W cm^-1 the crystallization of alpha-Fe_2O_3 particles was observed. The geometrical shape of these alpha-Fe_2O_3 particles was poor compared with those crystallized in the absence of ultrasound.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

Napomena
Journal of Molecular Structure, vol. 834-836, pages 141-149 (27 May 2007. Molecular Spectroscopy and Molecular Structure 2006 - A Collection of Papers Presented at the XXVIIIth European Congress on Molecular Spectroscopy, Istanbul, Turkey - September 3-8, 2006



POVEZANOST RADA


Projekti:
098-0982904-2952 - Sinteza i mikrostruktura metalnih oksida i oksidnih stakala (Ristić, Mira, MZOS ) ( POIROT)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Mira Ristić (autor)

Avatar Url Svetozar Musić (autor)

Avatar Url Mark Žic (autor)

Citiraj ovu publikaciju:

Žic, Mark; Ristić, Mira; Musić, Svetozar
57^Fe Mössbauer, FT-IR and FE SEM investigation of the formation of hematite and goethite at high pH values // Journal of Molecular Structure, 834-836 (2007), 141-149 (međunarodna recenzija, članak, znanstveni)
Žic, M., Ristić, M. & Musić, S. (2007) 57^Fe Mössbauer, FT-IR and FE SEM investigation of the formation of hematite and goethite at high pH values. Journal of Molecular Structure, 834-836, 141-149.
@article{article, author = {\v{Z}ic, Mark and Risti\'{c}, Mira and Musi\'{c}, Svetozar}, year = {2007}, pages = {141-149}, keywords = {ferrihydrite, alpha-Fe2O3, alpha-FeOOH, spectroscopy, FE SEM}, journal = {Journal of Molecular Structure}, volume = {834-836}, issn = {0022-2860}, title = {57\^{}Fe M\"{o}ssbauer, FT-IR and FE SEM investigation of the formation of hematite and goethite at high pH values}, keyword = {ferrihydrite, alpha-Fe2O3, alpha-FeOOH, spectroscopy, FE SEM} }
@article{article, author = {\v{Z}ic, Mark and Risti\'{c}, Mira and Musi\'{c}, Svetozar}, year = {2007}, pages = {141-149}, keywords = {ferrihydrite, alpha-Fe2O3, alpha-FeOOH, spectroscopy, FE SEM}, journal = {Journal of Molecular Structure}, volume = {834-836}, issn = {0022-2860}, title = {57\^{}Fe M\"{o}ssbauer, FT-IR and FE SEM investigation of the formation of hematite and goethite at high pH values}, keyword = {ferrihydrite, alpha-Fe2O3, alpha-FeOOH, spectroscopy, FE SEM} }

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


Uključenost u ostale bibliografske baze podataka::


  • Chemical Abstracts





Contrast
Increase Font
Decrease Font
Dyslexic Font