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Preparation and characterization of hydroxyapatite-coated iron oxide particles by spray-drying technique
Donadel, karina;Felisberto, Marcos D.V.;Laranjeira, Mauro C.M.;
Anais da Academia Brasileira de Ciências , 2009, DOI: 10.1590/S0001-37652009000200004
Abstract: magnetic particles of iron oxide have been increasingly used in medical diagnosis by magnetic resonance imaging and in cancer therapies involving targeted drug delivery and magnetic hyperthermia. in this study we report the preparation and characterization of iron oxide particles coated with bioceramic hydroxyapatite by spray-drying. the iron oxide magnetic particles (iomp) were coated with hydroxyapatite (hap) by spray-drying using two iomp/hap ratios (0.7 and 3.2). the magnetic particles were characterized by way of scanning electronic microscopy, energy dispersive x-ray, x-ray diffraction, fourier transformed infrared spectroscopy, flame atomic absorption spectrometry,vibrating sample magnetometry and particle size distribution (laser diffraction). the surface morphology of the coated samples is different from that of the iron oxide due to formation of hydroxyapatite coating. from an edx analysis, it was verified that the surface of the coated magnetic particles is composed only of hap, while the interior containsiron oxide and a few layers of hap as expected. the results showed that spray-drying technique is an efficient and relatively inexpensive method for forming spherical particles with a core/shell structure.
Increasing the oral bioavailability of poorly water-soluble carbamazepine using immediate-release pellets supported on SBA-15 mesoporous silica [Erratum]
Wang Z, Chen B, Quan G, Li F, Wu Q, Dian L, Dong Y, Li G, Wu C
International Journal of Nanomedicine , 2013, DOI: http://dx.doi.org/10.2147/IJN.S41619
Abstract: Increasing the oral bioavailability of poorly water-soluble carbamazepine using immediate-release pellets supported on SBA-15 mesoporous silica [Erratum] Erratum (448) Total Article Views Authors: Wang Z, Chen B, Quan G, Li F, Wu Q, Dian L, Dong Y, Li G, Wu C Supplementary video 1 showing Carbamazepine. Published Date February 2013 Volume 2013:8 Pages 627 - 628 DOI: http://dx.doi.org/10.2147/IJN.S41619 Received: 14 December 2012 Accepted: Published: 07 February 2013 Increasing the oral bioavailability of poorly water-soluble carbamazepine using immediate-release pellets supported on SBA-15 mesoporous silica Wang Z, Chen B, Quan G, et al. International Journal of Nanomedicine. 2012;7:5807–5818. This paper was published without the Supplementary materials. Read the original article Post to: Cannotea Citeulike Del.icio.us Facebook LinkedIn Twitter Other articles by Professor Chuanbin Wu Antimicrobial activity and the mechanism of silver nanoparticle thermosensitive gel Cubic phase nanoparticles for sustained release of ibuprofen formulation characterization and enhanced bioavailability study In vitro and in vivo evaluation of ordered mesoporous silica as a novel adsorbent in liquisolid formulation Increasing the oral bioavailability of poorly water-soluble carbamazepine using immediate-release pellets supported on SBA-15 mesoporous silica Readers of this article also read: Increasing the oral bioavailability of poorly water-soluble carbamazepine using immediate-release pellets supported on SBA-15 mesoporous silica A novel drug–phospholipid complex enriched with micelles: preparation and evaluation in vitro and in vivo Intracellular distribution of nontargeted quantum dots after natural uptake and microinjection Preparation and in vitro and in vivo characterization of cyclosporin A-loaded, PEGylated chitosan-modified, lipid-based nanoparticles Titanate nanowire scaffolds decorated with anatase nanocrystals show good protein adsorption and low cell adhesion capacity Formulation and in vitro and in vivo evaluation of film-coated montelukast sodium tablets using Opadry yellow 20A82938 on an industrial scale Formulation and cytotoxicity evaluation of new self-emulsifying multiple W/O/W nanoemulsions Evaluation of knowledge of cancer pain management among medical practitioners in a low-resource setting Nanoemulsion containing dapsone for topical administration: a study of in vitro release and epidermal permeation Short communication: carboxylate functionalized superparamagnetic iron oxide nanoparticles (SPION) for the reduction of S. aureus growth post biofilm formation
The inclusion of MgH2 into iron oxide and nickel oxide modified mesoporous carbon sorbent, an investigation on hydrogen production
Razie Dahti,Javad Khodaveisi,Moradi Seyyed Ershad
Hemijska Industrija , 2012, DOI: 10.2298/hemind110929107b
Abstract: In the present work, we investigated the hydrogen desorption properties of nano-sized MgH2 that was loaded on ordered mesoporous carbon (OMC) surface that had been already modified with nickel and iron oxide nanoparticles. The surface modified mesoporous carbon was characterized by BET surface area and X-ray diffraction (XRD) analysis. The amount of MgH2 on the carbon surface was confirmed by thermogravimetric analysis (TGA). Dehydrogenation data of MgH2 on the ordered mesoporous carbon were collected for the pressure up to 8 MPa (80 bar) at 500 K. The incorporated MgH2 on nickel oxide-mesoporous carbon nanocomposite had faster dehydrogenation kinetics compared to incorporated MgH2 on iron oxide-mesoporous carbon nanocomposite as well as incorporated MgH2 on mesoporous carbon. This can be attributed to the particle size of the former being smaller than that of the latter, as well as much accessible nanosized surface of loaded MgH2.
Preparation, Characterization, and Application of Magnetic Fe-SBA-15 Mesoporous Silica Molecular Sieves  [PDF]
Huayu Huang,Yongsheng Ji,Zhenfeng Qiao,Chuande Zhao,Jianguo He,Haixia Zhang
Journal of Analytical Methods in Chemistry , 2010, DOI: 10.1155/2010/323509
Abstract: Magnetic Fe-SBA-15 mesoporous silica molecular sieves were prepared, characterized, and used for magnetic separation. Wet impregnation, drying, and calcination steps led to iron inclusion within the mesopores. Iron oxide was reduced to the metal form with hydrogen, and the magnetic Fe-SBA-15 was obtained. Fourier-transform infrared spectroscopy confirmed the preparation process from the oxide to metal forms. The structure of magnetic materials was confirmed by M?ssbauer spectra. Powder X-ray diffraction data indicated that the structure of Fe-SBA-15 retained the host SBA-15 structure. Brunauer-Emmett-Teller analysis revealed a decrease in surface area and pore size, indicating Fe-SBA-15 coating on the inner surfaces. Scanning electron micrographs confirmed the decrease in size for modified SBA-15 particles. From scanning electron micrographs, it was found that the size of the modified SBA-15 particles decreased. Transmission electron micrographs also confirmed that modified SBA-15 retained the structure of the parent SBA-15 silica. Fe-SBA-15 exhibited strong magnetic properties, with a magnetization value of 8.8?emu?g-1. The iron content in Fe-SBA-15 was determined by atom adsorption spectroscopy. Fe-SBA-15 was successfully used for the magnetic separation of three aromatic compounds in water. Our results suggest wide applicability of Fe-SBA-15 magnetic materials for the rapid and efficient separation of various compounds. 1. Introduction Mesoporous SBA-15 silica molecular sieves of large pore diameter (up to 30?nm) and area (up to 1000?m2?g-1) [1] show excellent homogeneity and stability and can be well controlled for adsorption/desorption processes [2]. Mesoporous silica materials, especially mesoporous SBA-15 molecular sieves, have been modified with 3-mercaptopropyl, 3-aminopropyl, octyl, or octadecyl groups for the separation and analysis of inorganic ions, organic compounds, and biological molecules [2–5]. However, SBA-15 is notoriously difficult to separate from solution. Magnetic separation is a useful tool because of its fast recovery, high efficiency, and low high cost [6]. Inclusion of magnetic components in modified materials allows convenient and economical magnetic separation instead of centrifugation and filtration steps on application of an appropriate magnetic field [7–9]. Because of their potential applications in this approach, the preparation of Co, Co/Fe, α-Fe2O3, γ-Fe2O3, and Fe3O4 magnetic SBA-15 materials have been reported [10–15]. We propose a convenient and effective procedure for iron doping of mesoporous SBA-15 silica
Preparation and characterization of citric acid-modified superparamagnetic iron oxide nanoparticles

- , 2018, DOI: 10.3969/j.issn.1671-167X.2018.02.023
Abstract: 关键词: 柠檬酸, 超顺磁性氧化铁, 纳米粒, 磁共振成像, 磁靶向
Key words: Citric acid, Superparamagnetic iron oxide, Nanoparticles, Magnetic resonance imaging, Magnetic targeting
Keerthy Unni,Sheela Karalam B.,A.V. Vijayasankar
International Journal of Research in Ayurveda and Pharmacy , 2013, DOI: 10.7897/2277-4343.04212
Abstract: Iron based traditional Ayurvedic drug Annabhedi Sindooram is used therapeutically for the treatment of diseases like Anaemia, Leucoderma, Prolapse of rectum and uterus, Spleenic disorders. The preparation method of iron based Indian traditional drug Annabhedi Sindooram involves conversion of a pure metal into its mixed oxide by drying and incineration. Commercially available ferrous sulphate is used as the source of iron for the preparation of Annabhedi. The structural and textural properties of the starting materials and the prepared drug were characterized systematically by different characterization techniques like PXRD, Zeta Potential Analysis, particle analysis, FTIR, ICP –AES, SEM and BET surface area analysis. The results obtained by characterization of the samples clearly explain the formation of Fe2O3, reduction in particle size, modification of surface energy and formation of metal complex with organic moieties. The strict post and pre preparation conditions followed play an important role in the morphology and medicinal activity of the drug Annabhedi Sindooram.
Preparation of Mesoporous Silica Fibers in Porous Anodic Aluminum Oxide Template
WANG Wei, LI Xiao-Tian
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2010.01277
Abstract: Mesoporous silica fibers were prepared within porous anodic aluminum oxide membrane (AAO) using a simple Sol-Gel method. The sample was characterized by SEM, XRD, nitrogen adsorption-desorption and TEM. The diameter and the length of the mesoporous silica fibers are depend on the pore diameter and thickness of AAO membrane, respectively. The orientation of the nanochannels in mesoporous silica fibers can be readily controlled by changing the aging environment. For the samples aged with the presence of water, all the nanochannels in the silica fibers are found to be circular around the fibers. However, for the samples aged without water, the nanochannels were found to be parallel along the fiber axes.
New Ultra Small Iron-Oxide Nanoparticles with Titanium-Carbamate Coating: Preparation and Magnetic Properties  [cached]
Domenici V.,Dolci S.,Pampaloni G.,Jaglicic Z.
Proceedings of the International Conference Nanomaterials : Applications and Properties , 2012,
Abstract: This work deals with the preparation and chemical characterization of new Ultra-Small Iron-Oxide Superparamagnetic Nanoparticles (USPIONs) functionalized with Titanium-carbamate. The synthesis was performed starting from oleate-coated and 2-pyrrolidone-coated USPIONs having a maghemite (gamma-Fe2O3) and magnetite (Fe3O4) crystalline core, respectively. Zero-field-cooled (ZFC) and field-cooled (FC) magnetic susceptibility curves as well as the magnetization behavior as a function of temperature are reported and discussed in view of the superparamagnetic properties and coating effect of these new magnetic nanoparticles.
Preparation and Characterization of Cyano―functionalized Mesoporous Silica
GUO Feng, ZHU Gui-Ru, GAO Cong-Jie
无机材料学报 , 2012, DOI: 10.3724/sp.j.1077.2012.00134
Abstract: Cyano―functionalized mesoporous silicas were synthesized by one―pot co―condensation of tetraethoxysilane (TEOS) and 2―cyanoethyltriethoxysilane (CTES), using Pluronic P123 triblock copolymer as the structure― directing agent under strongly acidic conditions. The physicochemical properties, such as structure, morphology, pore property and cyano content were characterized by XRD, SEM, N2 adsorption―desorption isotherm, FT―IR and elemental analysis, respectively. It was found that the order for adding the two silicon sources, namely CTES and TEOS has a profound influence on the content and distribution of cyano group. Within three mixture orders, the sample synthesized with pre―mixed TEOS and CTES as silica sources is best, with highest cyano content and uniform distribution. As cyano content increasing, surface morphology and pore properties are changed. The straight cylindrical pore structure is transformed into bottle―neck―like structure with up to 20mol% CTES loading in the synthesis mixture. Pore volume, surface area and pore size decrease from 0.70 cm3/g to 0.22 cm3/g, 666 m2/g to 312 m2/g, 4.2 nm to 2.7 nm, respectively when cyano content is increased, which maybe result from that cyano group occupies part of pore channel.
Influence of Preparation Parameters and Characterization of Nano-compound Superparamagnetic Iron Oxide Particle in Dextran System

YANG Yu-Dong,LIANG Yon,SONG Zhi-Xia,XIAN Quan-Gang,

无机材料学报 , 2005,
Abstract: Compound nano-particles of the superparamagnetic iron oxide, which are core-shell structure with iron oxide as core and dextran as shell, were prepared in the single-carboxyl dextran water-base solution by a chemical co-deposition method. The factors of controlling the processing were investigated systematically. The compound particle's morphology and microstructure and the distribution of particale diameters were investigated by means of XRD, TEM and GLS. The resultes show that the diameter of the compound nano particle can be decreased by accurately controlling the modification dextran quantity added, the drip-speed of NH4OH and the reaction time as well as reaction temperature. Under the conditions of optimum parameters, the core-shell compound structure particle average diameter is 7.8nm, the average core diameter of iron oxide is 5nm and the thick of dextran shell is 1-1.5nm.
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