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Mesoporous Co 3 O 4 nanosheet-assembled hollow spheres were successfully synthesized by a facile solvothermal method, which only involves the PVP as soft templates and after annealing at 400 °C in an ambient atmosphere. By controlling the concentration of PVP, we can easily synthesize Co 3 O 4 hollow spheres with different …
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Fig. 4 g shows that the hollow structure spheres are obtained when the reaction time is 15 h. Finally, after prolonging the reaction time to 20 h (Fig. 4 h), the H-SnS completely evolve into hollow microflower spheres assembled by nanosheets. For the above-mentioned morphology study, the formation of the hollow structure can be …
Metal selenides have attracted increased attention as promising electrode materials for electrochemical energy storage and conversion systems including metal-ion batteries and water splitting. However, their practical application is greatly hindered by collapse of the microstructure, thus leading to performance fading. Tuning the structure …
Hollow sphere-like structures were obtained. These structures were self-assembled by the core–shell structure of magnetic Co NPs. Magnetic properties of the sample were studied by using VSM. A novel result was obtained in which these hollow sphere-like structures with small surface areas exhibited excellent water treatment …
Description. Shipping & Delivery. Description. This Modern Outdoor Garden Metal Decoration Corten steel Sculpture sphere, which made of corten steel. It becomes a …
Hollow spheres of graphene oxide, self-assembled in a water-in-oil emulsion, have potential applications in drug delivery, lithium-ion batteries and supercapacitors.
The photocatalysts possessing hollow structures hold distinct advantages as compared to their solid counterparts. This could be attributed to the fact that the cavity structure may boost the effective use of light source via multiple reflections as well as enhance the transportation of reactants and products [27].
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Fig. 2 shows TEM images of the sample, in which hollow sphere-like structures can be found with a diameter of about 180–250 nm. These hollow spheres are assembled by most sphere-like NPs with a diameter of about 20 nm and a small quantity of nanosized fiber.HRTEM image for the sample is shown in Fig. 2 D. The clear lattice …
Long et al. [9] synthesized hollow structure Pd–N doped carbon nanoreactors via the polymerization of dopamine on SiO 2 sphere in the presence of Pd 2+, which was applied to transform 4-nitrophenol into 4-aminophenol. The hollow structure catalysts facilitated the enrichment and desorption of reactants, exhibiting higher catalytic activity ...
Hollow carbon nanospheres (HCNs) have found broad applications in different kinds of electrochemical storage devices. The characteristic hollow structure can endow carbon electrode materials with good reaction …
Stainless steel ellipse Egg shape sculpture. 1. 2. →. We are capable of stainless steel spheres to almost any size. garden spheres.stainless steel decoration ball,etc.Hollow metal spheres in sizes 20mm to 4000mm in diameter.
Janus hollow silica spheres with an asymmetric shell are synthesized by self-assembled sol–gel process at an emulsion interface, and desired materials can be preferentially laden inside the cavities from their surroundings. Jump to main content . Jump to site search .
Hollow carbon spheres (HCSs) have broad application in many fields such as catalysis, adsorption and energy storage. Due to various restrictions on hard and soft templates, self-templating methods have received extensive attention. Generally, the conventional self-templating method includes two steps, including the hollowing and carbonization ...
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Hollow sphere-like structures self-assembled by Co NPs were produced. A novel result is obtained in which these hollow sphere-like structures with small …
Abstract. A simple hydrothermal method has been employed to fabricate monodisperse CeO2 hollow spheres assembled by nano-octahedra. Results revealed that the as-obtained CeO2 hollow spheres were ...
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An ingenious design is applied to synthesise unique double shelled hollow carbon nanospheres encapsulated with silicon nanodots (SiNDs@DSHC). As a promising anode for lithium ion batteries, this rationally designed carbon/silicon composite can offer several attractive advantages: (a) silicon nanodots with ultrasmall size can shorten lithium ion …
The utility model discloses an assembled spherical hollow slab, which comprises a prefabricated slab body, a bottom surface rib net, hollow sphere components and a slab surface rib net; the bottom surface rib net, the hollow sphere member and the panel rib net are sequentially arranged in the precast slab from bottom to top; vertical reinforcing steel …
The influence of different assembled morphologies in electrochemical performance was firstly evaluated. Cyclic voltammetry (CV) curves of all the three samples scanned at 2 mV s −1 exhibited a quasirectangular symmetrical shape, demonstrating the existence of both electrical double-layer capacitance and pseudocapacitance, which can …
Carbon sphere template derived hollow nanostructure is such a way to achieve the above strategies. Even controllable multi-layer hollow structures can be realized by different post-processing methods . As shown in Figure 3, it is the illustration of carbon sphere template derived hollow nanoheterostructure and controllable multilayer …
This paper reports the synthesis of hollow mesoporous silica (HMS) spheres using negative-charged polystyrene particles (ca. 200 nm in diameter) and cetyltrimethylammonium bromide as dual templates. The obtained HMS spheres were characterized by powder X-ray diffraction, high resolution transmission electron …
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In this study, we designed and successfully synthesized the Pt/polyoxometalate/hollow carbon sphere (Pt/POM/HCS) tri-component nanoparticles (NPs) by a pollution-free, efficient, and convenient method.HCSs with outstanding chemical stability and conductivity are self-generated by acid etching and calcination of silica …
As the boundary continues to shrink, the graphene sheets overlap each other until it is assembled into a hollow sphere. The resulting GAHN model was built by 84 CG graphene nanosheets with a same size of 200 Å × 200 …
December 04, 2023
December 09, 2023