Iron Fluoride Hollow Porous Microspheres Facile Solution
Mar 24 2014 · In this study uniform iron fluoride hollow porous microspheres have been synthesized for the first time by using a facile and scalable solution‐phase route. These uniform porous and hollow microspheres show a high specific capacity of 210 mA h g −1 at 0.1 C and excellent rate capability (100 mA h g −1 at 1 C) between 1.7 and 4.5 V
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One‐Pot Synthesis and Hierarchical Assembly of Hollow Cu2O
Aug 17 2007 · Hierarchical assembly of hollow microstructures is of great scientific and practical value and remains a great challenge. This paper presents a facile and one‐pot synthesis of Cu 2 O microspheres with multilayered and porous shells which were organized by nanocrystals. The time‐dependent experiments revealed a two‐step organization process in which hollow microspheres
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Ceria Hollow Nanospheres Produced by a Template-Free
Ceria hollow nanospheres composed of CeO 2 nanocrystals were synthesized via a template-free and microwave-assisted aqueous hydrothermal method. This is a low-cost and environmentally benign method. The chemicals used are all environmentally benign materials (cerium nitrate urea and water).
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Mesoscale Organization of Nearly Monodisperse Flowerlike
The obtained CeO 2 microsphere consists of 20−30 nm thick nanosheets as petals. It has an open three-dimensional (3D) porous and hollow structure and possesses high surface area large pore volume and marked hydrothermal stability. It can be doped easily after synthesis and
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Ceria Hollow Nanospheres Produced by a Template-Free
Ceria hollow nanospheres composed of CeO2 nanocrystals were synthesized via a template-free and microwave-assisted aqueous hydrothermal method. This is a low-cost and environmentally benign method. The chemicals used are all environmentally benign materials (cerium nitrate urea and water). An Ostwald ripening mechanism coupled with a self-templated self-assembly process in which
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Litchi-peel-like hierarchical hollow copper-ceria
Copper-ceria is considered to be a promising system used in exhaust treatment due to its low cost and decent catalytic activity. Herein we have developed novel litchi-peel-like hollow copper-ceria microspheres with varying Cu contents via an aerosol-assisted route. It is found that the dextrin in the spray solution plays a significant role as a sacial template and leads to the formation
Get PriceFabrication of Monodisperse Porous Zirconia Microspheres
Porous phosphorylated zirconia (PhZr) microspheres were prepared by further treating porous zirconia microspheres with phosphoric acid.
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Porous Hollow and Ball‐in‐Ball Metal Oxide Microspheres
Jun 27 2006 · An inexpensive ultrasonic generator ( humidifier ultrasonic spray pyrolysis) is used to synthesize porous hollow and ball‐in‐ball metal oxide microspheres (see figure). The morphology and pore size were controlled by the silica to Ti IV ratio and silica particle size. With the introduction of transition‐metal ions core/shell‐type microspheres can be synthesized in a single
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Monodisperse nanoporous ceria microspheres embedded
Monodisperse nanoporous ceria microspheres embedded with Pt nanoparticles general facile synthesis and catalytic application† Lin Zhou a Xiaoxiao Li b Yong Wang a Mei Hong a Yongye Liang b and Jing Zhao ac A monodisperse Pt/ceria hybrid with
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Controllable synthesis and characterization of porous Zn
Jul 14 2013 · In this work porous Zn/Cu composite hollow microspheres have been successfully prepared via a template-free solution phase route. By controlling the reaction temperature porous Zn/Cu composite hollow microspheres with the different Zn/Cu mass ratios were achieved. The results from X-ray powder diffraction and X-ray photoelectron spectroscopy show that porous Zn/Cu composite hollow
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Corrosive synthesis and enhanced electromagnetic
In this study novel porous hollow Ni/SnO2 hybrids were prepared by a facile and flexible two-step approach composed of solution reduction and subsequent reaction-induced acid corrosion. In our protocol it can be found that the hydrothermal temperature exerts a vital influence on the phase crystal
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Hollow TiO 2–X porous microspheres composed of well
Jan 13 2016 · Hollow TiO2–X porous microspheres consisted of numerous well-crystalline nanocrystals with superior structural integrity and robust hollow interior were synthesized by a facile sol-gel template-assisted approach and two-step carbonprotected calcination method together with hydrogenation treatment. They exhibit a uniform diameter of 470 nm with a thin porous wall shell of
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Biogenic synthesis and catalysis of porous CeO2 hollow
Apr 01 2012 · Meanwhile the crystalline sizes of the porous CeO 2 hollow microspheres and standard sample which can be calculated by Scherrer equation are about 6 and 51 nm respectively. Fig. 2 shows SEM and TEM images of rape pollen tem- plates and porous CeO 2 hollow microspheres synthesized
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Synthesis of porous and hollow microspheres of
Abstract. In this Letter we report the facile synthesis of novel porous and hollow microspheres of cubic Mn 2 O 3 nanocrystals of 50-100 nm via the heat-treatment of MnCO 3 microspheres which were prepared simply by reacting the MnCl 2 · 2H 2 O with Na 2 CO 3 in aqueous solution at ambient temperature and pressure. The products were characterized by X-ray powder diffraction X-ray
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(PDF) Porous microspheres Synthesis characterisation and
Porous microspheres are very promising for gastro retentive drug delivery alveoli targeted drug delivery high-speed chromatography development of tissue regeneration scaffolds and as carrier of
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Effect of Synthesis Time on Morphology of Hollow Porous
syntheses. Hollow porous silica microspheres were formed at 24 and 48 hours synthesis time. Under base catalyzed sol-gel solution the size of silica particles was in the range of 5.4 μm to 8.2 μm and the particles had surface area of 111 m2/g380 m 2/g. The longer synthesis time produced denser silica spheres with decreased pore sizes.
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Monodisperse nanoporous ceria microspheres embedded with
Porous ceria microspheres embedded with uniform and fine Pt nanoparticles formed after removal of the polymer templates by calcination. The hierarchical Pt/ceria hybrid possesses catalytic activity excellent stability and ease of recyclability.
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Microbial synthesis of hollow porous Prussian blue yeast
Microbial synthesis of hollow porous Prussian blue yeast microspheres and their synergistic enhancement of organic pollutant removal performance† Si Chen ab Bo Bai bcd Xiaohui Xu ab Na Hu cd Honglun Wangcd and Yourui Suocd In this work Prussian blue nanoparticles (PB NPs) were in situ grown on S. cerevisiae cells via one-step
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Hollow TiO 2–X porous microspheres composed of well
Jan 13 2016 · Hollow TiO2–X porous microspheres consisted of numerous well-crystalline nanocrystals with superior structural integrity and robust hollow interior were synthesized by a facile sol-gel template-assisted approach and two-step carbonprotected calcination method together with hydrogenation treatment. They exhibit a uniform diameter of 470 nm with a thin porous wall shell of
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Synthesis of mono‐dispersed ceria hollow nanospheres by a
Mono‐dispersed ceria (CeO 2) hollow nanospheres about 400 nm have been prepared via a facile one‐step hydrothermal method wherein cerium nitrate hexahydrate (Ce(NO 3) 3 ·6H 2 O) was used as cerium sources with the assistance of polyvinylpyrrolidone (PVP) in the ethylene glycol aqueous solution. X‐ray diffraction X‐ray photoelectron spectra scanning electron microscope transmission
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Hierarchical Organization and Catalytic Activity of High
Mar 05 2010 · Mesoporous Ce (OH)CO 3 microspheres with flowerlike three-dimensional (3D) hierarchical structure were successfully synthesized via different hydrothermal systems including glucose/acrylic acid fructose/acrylic acid glucose/propanoic acid and glucose/ n -butylamine systems.
Get PriceSynthesis of mono‐dispersed ceria hollow nanospheres by a
Mono‐dispersed ceria (CeO 2) hollow nanospheres about 400 nm have been prepared via a facile one‐step hydrothermal method wherein cerium nitrate hexahydrate (Ce(NO 3) 3 ·6H 2 O) was used as cerium sources with the assistance of polyvinylpyrrolidone (PVP) in the ethylene glycol aqueous solution. X‐ray diffraction X‐ray photoelectron spectra scanning electron microscope transmission
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One‐Pot Synthesis and Hierarchical Assembly of Hollow Cu2O
Aug 17 2007 · Hierarchical assembly of hollow microstructures is of great scientific and practical value and remains a great challenge. This paper presents a facile and one‐pot synthesis of Cu 2 O microspheres with multilayered and porous shells which were organized by nanocrystals. The time‐dependent experiments revealed a two‐step organization process in which hollow microspheres
Get PriceFabrication synthesis of porous Al2O3 hollow microspheres
Mar 15 2016 · Al 2 O 3 hollow microspheres with hierarchical pores have been synthesized via a novel sacial template process with further calcinations in which CaMg (CO3) 2 microspheres were used as sacial templates and Al (NO 3)·9H 2O was used as aluminum source. The route is facile and promising to use in preparation of other metal oxides.
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Controlled synthesis and properties of porous Cu/CeO2
Porous hollow microspheres of crystalline ceria were synthesized via a simple carbon sphere template method. The as-synthesized products were characterized by techniques of XRD XPS SEM TEM and
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Mesoscale Organization of Nearly Monodisperse Flowerlike
The obtained CeO 2 microsphere consists of 20−30 nm thick nanosheets as petals. It has an open three-dimensional (3D) porous and hollow structure and possesses high surface area large pore volume and marked hydrothermal stability. It can be doped easily after synthesis and
Get Price
Porous ceria hollow microspheres Synthesis and
Ceria Porous Hollow microspheres Synthesis Characterization abstract Porous hollow microspheres of crystalline ceria were synthesized via a simple carbon sphere template method. The as-synthesized products were characterized by techniques of XRD XPS SEM TEM and N 2 adsorption–desorption.
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Porous Hollow and Ball‐in‐Ball Metal Oxide Microspheres
Jun 27 2006 · An inexpensive ultrasonic generator ( humidifier ultrasonic spray pyrolysis) is used to synthesize porous hollow and ball‐in‐ball metal oxide microspheres (see figure). The morphology and pore size were controlled by the silica to Ti IV ratio and silica particle size. With the introduction of transition‐metal ions core/shell‐type microspheres can be synthesized in a single
Get PriceIn Situ Synthesis of the Hollow Silica Microspheres with
Hollow silica microspheres with porous surface were synthesized by using the pollen grains as biotemplate through an in-situ synthesis process in which the pollen grains were surface modified by ammonium oleate.
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