نتایج جستجو برای: fe2o3 ferric oxide

تعداد نتایج: 188428  

2017
Jing Hu Huiyuan Guo Junli Li Yunqiang Wang Lian Xiao Baoshan Xing

BACKGROUND Nutrient-containing nanomaterials have been developed as fertilizers to foster plant growth and agricultural yield through root applications. However, if applied through leaves, how these nanomaterials, e.g. γ-Fe2O3 nanoparticles (NPs), influence the plant growth and health are largely unknown. This study is aimed to assess the effects of foliar-applied γ-Fe2O3 NPs and their ionic co...

Journal: :Chemical communications 2014
Subhamay Pramanik Vandana Bhalla Manoj Kumar

Fluorescent aggregates formed by self-assembly of a hexaphenylbenzene based derivative serve as a reactor and a stabilizer for the formation of ferromagnetic iron oxide (α-Fe2O3) nanoparticles in aqueous medium at room temperature. These α-Fe2O3 nanoparticles showed excellent catalytic activity in palladium, copper and amine free Sonogashira cross coupling reactions and also in photocatalytic d...

Journal: :Soil Science and Plant Nutrition 2021

Anaeromyxobacter and Geobacter, iron-reducing bacteria belonging to Deltaproteobacteria, are newly discovered nitrogen-fixing predominant in paddy soils. We hypothesized that adding ferric iron oxide as an electron acceptor for respiration of the could enhance activity Geobacter In soil microcosm study, significantly increased after ferrihydrite or Fe2O3, oxides, soil. these soils, gene transcr...

Journal: :international journal of nanoscience and nanotechnology 2012
s. z. mohammadi m. khorasani-motlagh sh. jahani m. yousefi

α-fe2o3 (hematite) is the most stable iron oxide under ambient conditions. this transition metal oxide has been extensively investigated because it has unique electrical and catalytic properties. in this report, a novel microwave method for preparation of α-fe2o3 nanoparticles has been developed. the process contained two steps: first, precursor were obtained from a mixed solution of 50 ml of 0...

Journal: :The Journal of Physical Chemistry 1912

2009
A. Teleki M. Suter P. R. Kidambi O. Ergeneman F. Krumeich B. J. Nelson S. E. Pratsinis

Magnetic nanoparticles are frequently coated with SiO2 to improve their functionality and bio-compatibility in a range of biomedical and polymer nanocomposite applications. In this paper, a scalable flame aerosol technology is used to produce highly dispersible, superparamagnetic iron oxide nanoparticles hermetically coated with silica to retain full magnetization performance. Iron oxide partic...

2016
Chulwoo Park Jinhwan Jung Chul Wee Lee Joungmo Cho

This paper reports the synthetic route of 3-D network shape α-Fe2O3 from aqueous solutions of iron precursor using a non-ionic polymeric soft-template, Pluronic P123. During the synthesis of α-Fe2O3, particle sizes, crystal phases and morphologies were significantly influenced by pH, concentrations of precursor and template. The unique shape of worm-like hematite was obtained only when a starti...

Journal: :International Journal of Heat and Mass Transfer 2022

Nowadays, electronic components are one of the essential parts almost every smart device. To efficiently transfer desired amount heat, recent studies have focused on investigating potential advanced thermal coolants and heat sink configurations. Current study reveals novel water-based hybrid nanofluid silica (SiO2) ferric oxide (Fe2O3) for cooling high-heat-generating devices. The experimental ...

F. Soflaee M. Farahmandjou,

Iron oxide (Fe2O3) is widely used as a catalyst, pigment and gas sensitive material.  In this article, α-Fe2O3 nano-rods were first synthesized via a simple chemical method using iron(III) nitrate 9- hydrate (Fe(NO3)3.9H2O) as precursor. XRD pattern showed that the iron oxide nanoparticles exhibited alpha-Fe2O3 (hematite) structure in nanocrystals. The single-phase α- Fe2O3 nano-rods were prepa...

2013
VERÓNICA PAREDES-GARCÍA NÉSTOR TOLEDO JULIANO DENARDIN DIEGO VENEGAS-YAZIGI CARLOS CRUZ EVGENIA SPODINE ZHIPING LUO

In this work we present the synthesis and characterization of iron oxide nanoparticles (IONPs), which were structurally and magnetically characterized. The use of iron salts and an organic acid (l-serine or ascorbic acid) as precursors under solvothermal conditions yielded these coated IONPs. The powder X-ray diffraction pattern of FeO-1 and FeO-2 is consistent with hematite (a-Fe2O3) and hemat...

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