Tuned hydrothermal synthesis of vanadium dioxide nanotubes

Li, Hongyi; Qiu, Xin; Meng, Dong; Li, Xinlu; Zhang, Jintao; Xie, Bing

doi:10.1016/j.ceramint.2015.07.007

Cited by 9 publications

(7 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7e-f). 29,31 Due to the special hierarchical structure of hyperbranched nanoribbons, the specific surface area of vanadium oxides has been greatly increased. The small diameter (~1 μm) of nanorod clusters without hyperbranched structures implies the excess of EG in the reaction mixture.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical vanadium oxide microspheres forming from hyperbranched nanoribbons as remarkably high performance electrode materials for supercapacitors

Wei

Wang

et al. 2015

J. Mater. Chem. A

Self Cite

View full text Add to dashboard Cite

ARTICLE This journal isNovel hierarchical vanadium oxide microspheres forming from hyperbranched growth of nanoribbons have been successfully synthesized by solvothermal method. The as-prepared hierarchical microspheres are in diameter of ~5 μm, in which ~400 nm long nanoribbons grow hyperbranchingly on the clustering nanobelt backbones. These hierarchical microspheres contain 86.2 mass% V 6 O 13 with metallic conductivity and 13.8 mass% VO 2 . Investigation of growth mechanism indicates that EG plays an important role in the formation of hierarchical microspheres by regulating the solvent polar ity and vanadium valences. The hierarchical microspheres exhibit a specific capacitance as remarkably high as 456 F/g, with corresponding volumetric specific capacitance of 3.09 F/cm 3 , at 0.6 A/g in the potential range of 0 to 1.2 V. The maximal energy density and power density achieved are up to 22.8 Wh/kg (0.16 mWh/cm 3 ) and 1.2 kW/kg (8.14 mW/cm 3 ). The high performance of hierarchical vanadium oxide microspheres can be ascribed to the high specific surface area and large amount of mesopores provided by the hierarchical architecture, and the high conductivity and density of V 6 O 13 in high content in the hierarchical microspheres. This work has provided a new strategy to increase the specific capacitance of transition-metal oxides as electrode materials for the next-generation supercapacitors.

show abstract

Section: Resultsmentioning

confidence: 99%

Hierarchical vanadium oxide microspheres forming from hyperbranched nanoribbons as remarkably high performance electrode materials for supercapacitors

Wei

Wang

et al. 2015

J. Mater. Chem. A

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thereby, a conformal growth along alkyl amine chains is realized, as reported in the manuscript. In essence, dodecylamine acts as a template for VO 2 to form along its axis [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

“…Such nanotubes are typically 100–120 nm in diameter with inner open diameters of 70–80 nm. However, other groups have reported the use of vanadium oxides instead of alkoxides [ 31 , 32 ] to demonstrate cost-effective synthesis procedures for this material. Mai et al [ 33 ] presented the synthesis of 1D vanadium oxide nanowires by electrospinning using inorganic NH 4 VO 3 as a precursor and stated that the growth of NH 4 VO 3 nanorods on the surface of NH 4 VO 3 /PVA composite nanowires before annealing is crucial for the production of hierarchical vanadium oxide nanowires.…”

Section: Introductionmentioning

confidence: 99%

“…However, low-dimensional nanomaterials might have the disadvantage of dispersibility (self-aggregation) due to their higher surface energy. Highly ordered three-dimensional (3D) vanadium oxide nanomaterials in the form of urchins [ 29 , 34 , 35 ], flowers [ 36 , 37 ] and tubes [ 29 , 31 , 32 ] have been synthesized to overcome this problem. Pan et al [ 34 ] presented the different morphologies of 3D vanadium oxide (VO x ) microstructures (urchin-like micro flowers, nanosheet-assembled microflowers, nanohorn-structure microspheres) that were synthesized using a VOC 2 O 4 precursor using the solvothermal synthesis method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Morphological Control of VO2 Nanostructures via a One-Step Hydrothermal Method

et al. 2021

View full text Add to dashboard Cite

The morphology of nanostructures is a vital parameter to consider in components comprised of materials exhibiting specific functionalities. The number of process steps and the need for high temperatures can often be a limiting factor when targeting a specific morphology. Here, we demonstrate a repeatable synthesis of different morphologies of a highly crystalline monoclinic phase of vanadium dioxide (VO2(M)) using a one-step hydrothermal method. By adjusting the synthesis parameters, such as pH, temperature, and reducing agent concentration in the precursor, VO2 nanostructures with high uniformity and crystallinity are achieved. Some of these morphologies were obtained via the choice of the reducing agent that allowed us to skip the annealing step. Our results indicate that the morphologies of the nanostructures are very sensitive to the hydrazine hydrate (N2H4.H2O) concentration. Another reducing agent, dodecylamine, was used to achieve well-organized and high-quality VO2(M) nanotubes. Differential scanning calorimetry (DSC) experiments revealed that all samples display the monoclinic-to-tetragonal structural transition (MTST) regardless of the morphology, albeit at different temperatures that can be interpreted as the variations in overheating and undercooling limits. VO2(M) structures with a higher surface to volume ratio exhibit a higher overheating limit than those with low ratios.

show abstract

“…The results are given in Table 3. It has been proposed that the amine molecules are protonated during the synthesis and the cationic C 16 H 36 N + species remain intercalated within the oxide layers [46,49]. In such a case, the hybrid hexadecylamine-vanadium oxide material should possess some cation exchange capacity in a solvent which is capable of dissolving amine units.…”

Section: Textural Properties Of the Selected Hybrid Layered Structure And Effect Of Ion Exchange On Its Structural Properties And Morpholmentioning

confidence: 99%

Influence of the Nanotube Morphology and Intercalated Species on the Sorption Properties of Hybrid Layered Vanadium Oxides: Application for Cesium Removal from Aqueous Streams

et al. 2021

View full text Add to dashboard Cite

The present paper examines the impact that the nanotube morphology and organic or inorganic intercalated species may have on the cesium sorption by layered vanadium oxides prepared with the use of hexadecylamine as a structure-directing agent. The hybrid material represented by a chemical formula of (V2O5)(VO2)1.03(C16H36N)1.46(H2O)x was achieved through accelerated microwave-assisted synthesis carefully optimized to ensure the best compromise between the scroll-like morphology and the hydrophobic character. To enhance its dispersibility in water, this sample was subsequently modified by progressive replacement of the C16H36N+ units by NH4+ cations. The final materials represented a stacking of lamellar sheets with a worse scroll-like morphology. Both the optimization procedure and the template removal were monitored on the basis of scanning and transmission electronic microscopy, X-ray diffraction, infra-red spectroscopy, inductively coupled plasma-optical emission spectrometry, X-ray photoelectron spectroscopy, and elemental analysis, supplemented by adequate simulations methods providing the reference IR spectra and XRD patterns for comparison or the textural parameters of the samples. The comparison of the cesium sorption from either a 4:1 ethanol–water mixture or aqueous solutions pointed toward the solubility of intercalated cations in the bulk solution as the main factor limiting their displacement from the interlayer space by the oncoming cesium ones. The sample obtained after 70% exchange with NH4+ exhibited a maximum sorption capacity of 1.4 mmol g−1 from CsNO3 aqueous solutions and its retention efficiency remained significant from low-concentration Cs solutions in river or sea water.

show abstract

Tuned hydrothermal synthesis of vanadium dioxide nanotubes

Cited by 9 publications

References 22 publications

Hierarchical vanadium oxide microspheres forming from hyperbranched nanoribbons as remarkably high performance electrode materials for supercapacitors

Hierarchical vanadium oxide microspheres forming from hyperbranched nanoribbons as remarkably high performance electrode materials for supercapacitors

Synthesis and Morphological Control of VO2 Nanostructures via a One-Step Hydrothermal Method

Influence of the Nanotube Morphology and Intercalated Species on the Sorption Properties of Hybrid Layered Vanadium Oxides: Application for Cesium Removal from Aqueous Streams

Contact Info

Product

Resources

About