Hydrothermal growth and optical properties of Nb<sub>2</sub>O<sub>5</sub> nanorod arrays

He, Jiarong; Hu, Yongming; Wang, Zhao; Lü, Wei; Yang, Shulin; Wu, Guitai; Wang, Yu; Wang, Shengfu; Gu, Haoshuang; Wang, John

doi:10.1039/c4tc01581a

Cited by 51 publications

(26 citation statements)

References 27 publications

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“…That should be attributed to the suppressed orientation-growth of the samples at high alkalinity, which always results in the aggregated growth under hydrothermal condition. 27 Furthermore, the low-magnication top-view SEM image shown in Fig. S2 † conrms that the NRAs could be large-scale grown on the substrate with uniform structure and distribution under the alkalinity of 8 M. The high-magnication SEM image shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO₃ nanorod arrays

Zhao

et al. 2017

RSC Adv.

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Section: Resultsmentioning

confidence: 97%

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO₃ nanorod arrays

Zhao

et al. 2017

RSC Adv.

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“…34 Wang and coworkers prepared arrays of Nb2O5 nanorods supported on a niobium foil through a hydrothermal process using H2O2 as the oxidant. 35 We have previously reported rodlike Nb2O5 nanostructures with an aspect ratio 3.4 ± 0.7 using a solution-phase non-hydrolytic method. 36 Disadvantages associated with these previously reported methods include relatively long reaction times (e.g., 2 to 30 days), an aggregated product, the need for subsequent heating of the products at high temperatures, and/or a requisite step to remove the template from the products.…”

Section: Solvothermal Methods To Prepare Nb2o5 Nanomaterials Have Beementioning

confidence: 99%

Surfactant Controlled Growth of Niobium Oxide Nanorods

Ali

Nazemi

Gates

2017

Crystal Growth & Design

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This paper describes a solution-phase hydrothermal synthesis of crystalline niobium pentoxide (Nb2O5) nanorods. The methods reported herein yield uniform Nb2O5 nanorods with average diameters of 6 nm and lengths of 38 nm, which are directly synthesized from niobic acid by a hydrothermal process. The formation of Nb2O5 nanorods from niobic acid was studied in the presence of surfactants that stabilize the nanostructures. The crystalline Nb2O5 nanorods were relatively uniform in size and shape. The size of the Nb2O5 nanorods could be tuned through the choice of surfactant even in the absence of a worm-like micellar morphology. Amine, amide, ammonium, carboxylate, sulfonate and sulfate containing surfactants were systematically evaluated for their influence on the ability to form uniform Nb2O5 nanorods. The surfactants in this study had hydrophobic tails that were either straight or branched, such as a polymer, and contained either a single or multiple head groups. The nanorods grew by a process of oriented attachment of nanoparticles that was regulated by the surfactants added into the reaction mixture. The results of these studies indicate that this synthetic approach serves as a tunable platform to prepare single crystalline niobium oxide based nanostructures with well-defined morphologies and dimensions. This surfactant assisted formation of crystalline Nb2O5 nanorods could also have important implications in the design of other transition metal oxide based nanomaterials.

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“…Despite the wide observations in various materials, the structural relations to their parent crystalline phases remain unclear. Nb 2 O 5 has various applications in special optical glasses, chemical fiber panels, monolithic capacitors and piezoelectric ceramic elements because of its high dielectric constant, high refractive index, outstanding photoelectric properties, and high chemical stability [26][27][28][29][30]. This material is known to display several different polymorphs depending on pressure-temperature conditions to which this compound is subjected.…”

Section: Introductionmentioning

confidence: 99%

Pressure induced transformation and subsequent amorphization of monoclinic Nb₂O₅ and its effect on optical properties

Guan

Zhang

et al. 2019

J. Phys.: Condens. Matter

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Pressure-induced phase transitions of monoclinic H-Nb 2 O 5 have been studied by in situ synchrotron x-ray diffraction, pair distribution function (PDF) analysis, and Raman and optical transmission spectroscopy. The initial monoclinic phase is found to transform into an orthorhombic phase at ~9 GPa and then change to an amorphous form above 21.4 GPa. The PDF data reveal that the amorphization is associated with disruptions of the long-range order of the NbO 6 octahedra and the NbO 7 pentagonal bipyramids, whereas the local edgeshares of octahedra and the local linkages of pentagonal bipyramids are largely preserved in their nearest neighbors. Upon compression, the transmittance of the sample in a region from visible to near infrared (450-1000 nm) starts to increase above 8.0 GPa and displays a dramatic enhancement above 22.2 GPa, indicating that the amorphous form has a high transmittance.The pressure-induced amorphous form is found to be recoverable under pressure release, and maintain high optical transmittance property at ambient conditions. The recoverable pressure induced amorphous material promises for applications in multifunctional materials.

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Hydrothermal growth and optical properties of Nb₂O₅ nanorod arrays

Abstract: H–Nb2O5 nanorod arrays with c-axis orientation were in situ synthesized by a hydrothermal process, and they exhibit a blue and cyan light emission.

Cited by 51 publications

References 27 publications

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO₃ nanorod arrays

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO₃ nanorod arrays

Surfactant Controlled Growth of Niobium Oxide Nanorods

Pressure induced transformation and subsequent amorphization of monoclinic Nb₂O₅ and its effect on optical properties

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Hydrothermal growth and optical properties of Nb2O5 nanorod arrays

Abstract: H–Nb2O5 nanorod arrays with c-axis orientation were in situ synthesized by a hydrothermal process, and they exhibit a blue and cyan light emission.

Cited by 51 publications

References 27 publications

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO3 nanorod arrays

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO3 nanorod arrays

Surfactant Controlled Growth of Niobium Oxide Nanorods

Pressure induced transformation and subsequent amorphization of monoclinic Nb2O5 and its effect on optical properties

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Hydrothermal growth and optical properties of Nb₂O₅ nanorod arrays

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO₃ nanorod arrays

Orientation-dependent piezoresponse and high-performance energy harvesting of lead-free (K,Na)NbO₃ nanorod arrays

Pressure induced transformation and subsequent amorphization of monoclinic Nb₂O₅ and its effect on optical properties