Catalytic growth of a colloidal carbon sphere by hydrothermal reaction with iron oxide (Fe3O4) catalyst

Lee, Kang Uk; Kim, Myung Joon; Park, Kyung Ju; Kim, Myeongho; Kwon, Oh Joong; Kim, Jae Jeong

doi:10.1016/j.matlet.2014.03.163

Cited by 20 publications

(7 citation statements)

References 22 publications

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“…In a typical procedure [22][23][24], 14.4 g of glucose was firstly dissolved in deionized water (80 mL). Then the solution was transferred into a 100 mL Teflon-lined stainless steel autoclave.…”

Section: Preparation Of Carbon Sphere Templatesmentioning

confidence: 99%

A Novel Bi2O3 Modified C-doped Hollow TiO2 Sphere Based on Glucose-derived Carbon Sphere with Enhanced Visible Light Photocatalytic Activity

Chai

Meng

Liu

et al. 2022

J Inorg Organomet Polym

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The hydrothermal method was used to synthesize carbon sphere, and the hard template synthesis method was used to prepared C-doped hollow TiO2 sphere (CT). Bismuth nitrate was used as bismuth source to modify CT. The composite material was oxidized in air atmosphere at 450 ℃ to obtain Bi2O3 modified C-doped TiO2(BCT) hollow spheres. The morphology, elemental composition and photocatalytic degradation efficiency of tetracyclines (TC) by BCT hollow spheres were characterized by various measurements. Additionally, the possible transformation pathways and degradation mechanism of tetracycline were revealed via LC-MS and trapping experiments. The experimental results show that the Bi nanoparticles are uniformly dispersed in the BCT hollow spheres. The photocatalyst exhibits enhanced degradation rate of TC (98.4% under visible-light within 180 min and 99.4% under natural light within 50 min) for its structure and narrow bandgap (2.87 eV). After five degradation cycles, the photocatalyst still remains high removal rate of 96.4% for TC. The results indicate that the photocatalyst may be promising for degrading antibiotic residuals remains. According to the trapping experiment, •OH and h + have a certain role on the photodegradation process, while •O 2− is the main active species for degrading TC.

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Section: Preparation Of Carbon Sphere Templatesmentioning

confidence: 99%

A Novel Bi2O3 Modified C-doped Hollow TiO2 Sphere Based on Glucose-derived Carbon Sphere with Enhanced Visible Light Photocatalytic Activity

Chai

Meng

Liu

et al. 2022

J Inorg Organomet Polym

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“…By reducing the size and dimensions, materials properties are enhanced in many fields of physics. Interest in magnetic nanoparticles has been motivated by numerous potential appli cations in advanced nanotechnologies [1][2][3][4] . Elaboration and investigation of new structures and new geometries ensure a continuing interest in magnetic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and magneto-optical properties of assembly of nanodots obtained from solid-state dewetting of ultrathin cobalt layer

Andalouci

Roussigné

Farhat

et al. 2019

J. Phys.: Condens. Matter

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An assembly of randomly organized cobalt nanoparticles were obtained by solidstate dewetting of a 3 nmthick cobalt layer. Vibrating sample magnetometry and Brillouin light scattering techniques were used to investigate both their static and dynamic behaviors with respect to the initial native cobalt layer. The measurements obtained from the assembly of the obtained nanodots were analyzed by means of shape anisotropy contribution. The Brillouin spectra revealed an unusual reversed Stokes/antiStokes line height asymmetry comparing to that observed on the native layer. The effective optical properties of the nanodots, combined with the relation between mean field and insidedot field allowed explaining the observed reversed height asymmetry. The assembly of nanodots behave as an effective magnetic and optical medium where these properties can be tuned by the elaboration process.

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“…Ferrofluid is a kind of smart materials formed by magnetic nanoparticles with surfactants coated on the surface dispersing in a carrier liquid [1,2]. As a functional material, ferrofluid has aroused considerable interest for its unique properties which have been widely used in many fields, such as biomedicine [3], catalyst [4], magnetic resonance imaging [5,6], gene detection [7], cell sorter [8,9], and so on. In addition, ferrofluid exhibits remarkable magneto-optical properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of a New Low Refractive Index Ferrofluid

Cao

Cui

et al. 2019

Materials

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In this research, a new low refractive index ferrofluid is proposed by coating magnetic nanoparticles with a layer of silver, applying the method of modified chemical co-precipitation. This preparation method is green and environmentally friendly without toxic gases being released. Coated nanoparticles are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), and vibration sample magnetometery (VSM). These characterizations show that the silver nanoparticles grow on the surface of magnetic nanoparticles in this new ferrofluid. The hysteresis loop of this new ferrofluid demonstrates that it maintains superparamagnetic properties. A new method of refractive index measurement is applied in this research by employing a long-period grating (LPG) optical fiber sensor. The change value in the refractive index per unit concentration reduces by 16.46% compared to the conventional ferrofluid.

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Catalytic growth of a colloidal carbon sphere by hydrothermal reaction with iron oxide (Fe3O4) catalyst

Cited by 20 publications

References 22 publications

A Novel Bi2O3 Modified C-doped Hollow TiO2 Sphere Based on Glucose-derived Carbon Sphere with Enhanced Visible Light Photocatalytic Activity

A Novel Bi2O3 Modified C-doped Hollow TiO2 Sphere Based on Glucose-derived Carbon Sphere with Enhanced Visible Light Photocatalytic Activity

Magnetic and magneto-optical properties of assembly of nanodots obtained from solid-state dewetting of ultrathin cobalt layer

Preparation and Characterization of a New Low Refractive Index Ferrofluid

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