Vanadium pentoxide: Synthesis and characterization of nanorod and nanoparticle V2O5 using CTAB micelle solution

Asim, Nilofar; Radiman, Shahidan; Yarmo, Mohd Ambar; Golriz, M.S. Banaye

doi:10.1016/j.micromeso.2008.12.013

Cited by 55 publications

(30 citation statements)

References 16 publications

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“…Figures 2a and b indicate that the samples prepared at 500 and 700 8C have an amorphous structure. Meanwhile, the particle structure was nanorods, [18] ribbonlike shape, [9] or strip-like shape [19] at higher temperatures (900-1300 8C). The particle size, d BET in Table 1, gradually increased with increasing synthesis temperature from 900 to 1300 8C.…”

Section: à3mentioning

confidence: 99%

Chemical Vapor Synthesis and Physico‐chemical Properties of V₂O₅ Nanoparticles

Chin

Park

et al. 2012

Chemical Vapor Deposition

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In the field of heterogeneous catalysts, nanometer-size transition metal oxides are of great interest. In particular, vanadium oxide-based materials, including vanadium pentoxide (V 2 O 5 ) and vanadium phosphates, are catalysts for the mild oxidation of hydrocarbons and alcohols.[1] To date, V 2 O 5 has attracted increasing interest for its potential applications as catalysts, sensors, and electrodes. V 2 O 5 powders can be obtained by various physical and chemical methods, such as CVD, [2][3][4] hydrothermal method, [1,3,5] spray pyrolysis, [6] sol-gel, [7][8][9] co-precipitation, [10] and microwave plasma-torch method, [11] etc. Chemical vapor synthesis, also known as CVD or chemical vapor condensation (CVC), [12][13][14] is an alternative method for the direct synthesis of nanoparticles. The principle advantages of the reactions in the gas phase are, very short process times, and nanometer-scale powders of high purity with a narrow particle size distribution. The particle morphology, crystalline phase, and surface chemistry of thermally decomposed particles can be controlled by regulating the precursor composition, reaction temperature, pressure, solvent property, and aging time. [15,16] In a typical CVC process, the precursor solution is atomized into an aerosol reactor (electric furnace) where droplets undergo solvent evaporation and solute precipitation within the droplets, which are then dried. In a typical thermal decomposition process, the precursor solution was atomized into an aerosol reactor, where droplets underwent solvent evaporation and solute precipitation within the droplets, which were then dried, followed by thermolysis of the precipitates at higher temperatures, and finally sintering to form the final particles.[15]In the CVC process, the synthesis temperature is one of the most important factors for determining the particle morphology, such as the crystal phase, size, specific surface area, surface composition, and chemical state. [15,17] In this study, V 2 O 5 nanoparticles were obtained by the thermal decomposition of a vanadium oxytriethoxide (VOTE) solution. The detailed microstructural characteristics of the thermally decomposed nanoparticles were examined as a function of the synthesis temperatures (500-1300 8C). Figure 1a shows X-ray diffraction (XRD) patterns of the V 2 O 5 nanoparticles prepared at each synthesis temperature. The XRD patterns of the V 2 O 5 samples synthesized at 900, 1100, and 1300 8C showed similar patterns with different peak intensities, and indicated a single-Shcherbinaite phase with an orthorhombic structure (JCPDS Card No. 41-1426) and lattice parameters of a ¼ 1.1516 nm, b ¼ 0.332 nm, and c ¼ 0.43727 nm. [8,10] In addition, the peak intensities of the V 2 O 5 samples increased with increasing synthesis temperature to 900 and 1300 8C, indicating enhanced crystallization. The peaks (001) intensity became higher and the peak shape narrower, indicating an increase in V 2 O 5 crystallite or grain size, which was calculated from the line broadening of (001) dif...

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Section: à3mentioning

confidence: 99%

Chemical Vapor Synthesis and Physico‐chemical Properties of V₂O₅ Nanoparticles

Chin

Park

et al. 2012

Chemical Vapor Deposition

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“…Over the past decades, the application of porous calcium phosphate as carriers in drug delivery has attracted much attention due to significant advantages such as large specific surface area and high loading capacity for drug (3), protein (4,5), or DNA molecules (6,7). Among the application methods which include micelle-templated synthesis (8,9), emulsion process (10)(11)(12), and surfactant-assisted route (13,14), micelletemplated synthesis technique has been the most widely used. To date, polymeric micelle templates have been successfully applied to the fabrication of many porous calcium phosphate carriers.…”

Section: Introductionmentioning

confidence: 99%

In Vitro Release and Bioavailability of Silybin from Micelle-Templated Porous Calcium Phosphate Microparticles

Zhu

Wang

et al. 2015

AAPS PharmSciTech

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ABSTRACT. Developing a promising carrier for the delivery of poorly water-soluble drugs, such as silybin, to improve oral absorption has become a very worthy of consideration. The goal of this study was to prepare a novel porous calcium phosphate microparticle using povidone-mixed micelles as template while evaluating its in vitro and in vivo properties with silybin as a model drug. The particle characterization, in vitro drug release behavior, and pharmacokinetic parameters of the prepared silybin-loaded calcium phosphate microparticle were investigated. The mean particle size was found to be 3.54±0.32 μm with a rough surface porous structure. Additionally, the silybin-loaded calcium phosphate microparticle compared with the free silybin showed a prolonged 72-h release in vitro and a higher C max (418.5± 23.7 ng mL −1 ) with 167.5% oral relative bioavailability. A level A in vitro-in vivo correlation (IVIVC), established for the first time, demonstrated an excellent IVIVC of the formulated silybin in oral administration. In conclusion, this povidone-mixed micelle-based microparticle was successfully prepared to enhance the oral bioavailability of silybin. Therefore, application of this novel porous calcium phosphate microparticle holds a significant potential for the development of poorly water-soluble drugs.

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“…Thus, developing a simple, cost-effective and sustainable synthesis method is an important aspect to obtain high crystalline, high purity and well dispersed production for further properties study and wide applications. As a straightforward route to obtain 1D structure, template technique has been used as a powerful tool for the fabrication of 1D nanomaterials [20,21]. However, no report has been found on the synthesis of 1D nanostructure magnesium borate with this method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Raman properties of magnesium borate micro/nanorods

Shen

et al. 2012

Materials Research Bulletin

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Vanadium pentoxide: Synthesis and characterization of nanorod and nanoparticle V2O5 using CTAB micelle solution

Cited by 55 publications

References 16 publications

Chemical Vapor Synthesis and Physico‐chemical Properties of V₂O₅ Nanoparticles

Chemical Vapor Synthesis and Physico‐chemical Properties of V₂O₅ Nanoparticles

In Vitro Release and Bioavailability of Silybin from Micelle-Templated Porous Calcium Phosphate Microparticles

Synthesis and Raman properties of magnesium borate micro/nanorods

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Vanadium pentoxide: Synthesis and characterization of nanorod and nanoparticle V2O5 using CTAB micelle solution

Cited by 55 publications

References 16 publications

Chemical Vapor Synthesis and Physico‐chemical Properties of V2O5 Nanoparticles

Chemical Vapor Synthesis and Physico‐chemical Properties of V2O5 Nanoparticles

In Vitro Release and Bioavailability of Silybin from Micelle-Templated Porous Calcium Phosphate Microparticles

Synthesis and Raman properties of magnesium borate micro/nanorods

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Product

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Chemical Vapor Synthesis and Physico‐chemical Properties of V₂O₅ Nanoparticles

Chemical Vapor Synthesis and Physico‐chemical Properties of V₂O₅ Nanoparticles