Thermal formation mechanism and size control of spherical hematite nanoparticles

Fan, Honglei; Song, Baozhen; Liu, Juhua; Yang, Zhenqiu; Li, Qiaoxia

doi:10.1016/j.matchemphys.2004.09.021

Cited by 18 publications

(11 citation statements)

References 15 publications

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“…The two prominent peaks (104) and (110), indexed to the JCPDS no. 33-0664, could be understood to grow from (004) and , while the (104) peak growing with higher intensity compared to (110), which was a common observation in an earlier report [33].…”

Section: Resultssupporting

confidence: 59%

“…It takes a minute to an hour for the hydroxylation depending on the surface reactivity of each plane. It is a well-established fact that Hematite surface usually contains Fe atoms with unoccupied state and act as Lewis acids and reacts with Lewis bases such as hydroxyl ions via the available electron pair [33]. Due to the same, hydroxyl ions adsorb on the surface of iron oxide via coordination with Fe atoms.…”

Section: How Hematene Forms?mentioning

confidence: 99%

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Fast Sonochemical Exfoliation of Hematene type Sheets and Flakes from Hematite Nanoarchitectures Shows Enhanced Photocurrent Density

Bora

2021

Preprint

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<p><a>Here, we describe the exfoliation of 2D Hematene single layer from a Hematite nanoparticle-based nanoarchitectures obtained by a water-mediated synthesis route with the ultrasonication method in a brief period which is 5 min. The Hematene obtained shows the fine structure of honeycomb lattice resembling the Hematite hexagonal crystallographic pattern. Here, we found that the ultrasonicated Hematite film with Hematene flakes shows enhanced current density than the pristine Hematite film which can be extended further to increase the efficiency of well-performing or champion photoanode for the artificial photosynthesis application. Besides this, a new photocurrent transient spike is obtained, which we ascribed as the generation of the sub-surface state by Hematene flakes. Followed by this, we have also deciphered a qualitative predictive mechanism for the fast exfoliation of Hematene in which surface energies and hydroxylation of crystal facets are proposed to be the factor responsible for the quick exfoliation process. </a></p>

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Section: Resultssupporting

confidence: 59%

Section: How Hematene Forms?mentioning

confidence: 99%

Fast Sonochemical Exfoliation of Hematene type Sheets and Flakes from Hematite Nanoarchitectures Shows Enhanced Photocurrent Density

Bora

2021

Preprint

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“…Nanoparticles can also be synthesised by electrochemical anodic dissolution of the metal [4,5]. In the reference literature, numerous techniques differing in process parameters are described to obtain nanoparticles of zinc oxide by thermal decomposition of the Zn-containing compounds [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Zno Nanoparticles by Thermal Decomposition of Basic Zinc Carbonate

Hutera¹,

Kmita²,

Olejnik³

et al. 2013

Archives of Metallurgy and Materials

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The paper presents a method for obtaining nanoparticles of ZnO by thermal decomposition of the Zn-containing compounds. The experiment was based on the thermal decomposition of basic zinc carbonate to zinc oxide (with a content of 58-61 wt.%). Basic zinc carbonate was analysed by derivatography and then annealed at a selected temperature (about 600• C) for about 1 h. Products of thermal decomposition of the compound were studied by XRD analysis and SEM scanning microscopy.Keywords: ZnO nanoparticles, thermal decomposition, X-ray methods, SEM W pracy zaprezentowano metodę otrzymywania nanocząstek ZnO na drodze termicznego rozkładu związków zawierających Zn. W eksperymencie wykorzystano termiczny rozkład zasadowego węglanu tlenku cynku (o zawartości od 58-61% mas.). Zasadowy węglan cynku poddano analizie derywatograficznej a następnie wygrzewaniu w określonej temperaturze (ok. 600• C przez ok. 1 godz.). Produkty termicznego rozkładu związku badano analizą XRD oraz mikroskopią skaningową SEM.

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“…Nanomaterials have attracted growing attention because of their size dependent novel magnetic, optical, electrical, and other physicochemical properties that give an opportunity to use them various significant potential applications [1][2][3][4]. Recently, it is realized that functionality and features of the nanostructures can be controlled by not only their size but also the shape of nanomaterials, so the production of nanostructures with desired morphology, orientation and dimensionality is also a currently a major focus for development of nanoscience and nanotechnology [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of the nanostructured hollow iron oxide spheres and nanoparticles by aerosol route

Gürmen

Ebin

2010

Journal of Alloys and Compounds

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Thermal formation mechanism and size control of spherical hematite nanoparticles

Cited by 18 publications

References 15 publications

Fast Sonochemical Exfoliation of Hematene type Sheets and Flakes from Hematite Nanoarchitectures Shows Enhanced Photocurrent Density

Fast Sonochemical Exfoliation of Hematene type Sheets and Flakes from Hematite Nanoarchitectures Shows Enhanced Photocurrent Density

Synthesis of Zno Nanoparticles by Thermal Decomposition of Basic Zinc Carbonate

Production and characterization of the nanostructured hollow iron oxide spheres and nanoparticles by aerosol route

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