Preparation of rod-like Nb2O5 particles by molten-salt process and the mechanism for the anisotropic grain growth

Zhou, Yibo; Li, Guorong; Zeng, Jiangtao; Zheng, Liaoying; Zhao, Kun; Ruan, Wei

doi:10.1016/j.ceramint.2015.03.162

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…A controlled growth of Nb 2 O 5 nanorods was evaluated using various surfactants while also examining the effect of these additives on the morphology and uniformity of the nanorods. Interest in 1D Nb 2 O 5 based nanomaterials is in part for their relatively large surface area, anisotropic structure, and ease of doping with other metals. − These nanostructures have attracted attention for their potential use in a wide range of applications, such as support materials in catalysis, , electrochromic materials for display technologies, cathodic materials in lithium ion batteries, and substrates for gas sensing . In addition, Nb 2 O 5 is also an important raw material in the preparation of other metal niobates, which themselves have properties of interest for piezoelectrics, nonlinear optical materials, photorefractive materials, and photocatalytic substances .…”

Section: Introductionmentioning

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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