Structural transformation from NaHTi3O7 nanotube to Na2Ti6O13 nanorod

Zhu, Kejia; Yuan, Yupeng; Zhang, M.S.; Hong, Jian‐Min; Deng, Yu; Zhang, Yin

doi:10.1016/j.ssc.2007.09.015

Cited by 41 publications

(38 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…. A5‐110 transforms into a new phase after HT treatment, and its diffraction peaks, located at approximately 10°, 24°, 28°, and 48°, are generally consistent with most of the HT‐derived titanate products . Before discussing the chemical composition of the as‐obtained titanate, we temporarily called it “Na‐titanate”.…”

Section: Resultsmentioning

confidence: 99%

“…A broadening of the band at 445 cm −1 is also observed, which may be due to the structural distortion of the Na‐titanate. In addition, a broad shoulder at around 700 cm −1 corresponds to the Ti–O–H bond, which may indicate a replacement of Na + by H + during the water washing process. All samples reveal the presence of Ti–O–H bands, implying that H + ions are also present within the Na‐titanate structure.…”

Section: Resultsmentioning

confidence: 99%

“…Such dehydration is more vigorous at temperatures as high as 300°C, and the crystal structure of the Na‐titanate becomes completely destroyed. Zhu et al . suggested that the sodium titanate nanotubes tend to align in parallel to form bundles of nanotubes, and Na 2 Ti 6 O 13 nanorods are formed from these bundles at700°C.…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, no general rule or clear mechanism is applicable to all cases so far. In addition, a discrepancy in the phase transformation behavior of the titanate structure also reveals, in which different phases have been reported for the HT derived titanate after calcination treatments . Gajovic et al .…”

Section: Introductionmentioning

confidence: 98%

“…First, the composition of the HT derived titanate remains ambiguous. Several different crystal structures and compositions have been proposed to describe this titanate product, such as TiO 2 anatase, bititanate [Na x Ti 2− x O 4 (OH) or Na x H 2− x Ti 2 O 5 (H 2 O)], lepidocrocite titanates (H x Ti 2− x /4 □ x /4 O 4 ), □ represents vacancies, trititanates (Na x H 2− x Ti 3 O 7 ), and tetratitanate (H 2 Ti 4 O 9 ·H 2 O) . Due to the various preparation conditions mentioned in the literatures, the reaction temperature, duration, and post treatments may all result in different compositions of the HT derived titanate.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Morphology, Chemical Composition and Phase Transformation of Hydrothermal Derived Sodium Titanate

Zuo

2012

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

This study intends to clarify the discrepancies on the effect of precursor size, chemical composition, and thermal behavior of Na-titanate obtained through a conventional hydrothermal reaction of anatase in a highly concentrated aqueous NaOH solution. According to experimental results, as well as that presented in related literatures, ultrafine anatase precursor favors nanofiber formation, whereas larger-particle anatase precursor forms nanotubes. The formation mechanism, in correlation with the precursor size and the resulting morphology of the obtained titanate product, is described in detail. According to X-ray Diffraction and Raman analyses, the as-formed Na-titanate is considered a quasi-disordered structure that allows the occupation of a wide range of Na into the titanate structure. An increased Na/Ti ratio is observed with increased temperature, which simultaneously results in a distortion of the titanate structure. Moreover, the as-synthesized Na-titanate is thermally unstable and tends to degrade into amorphous clusters after heat treatment at 300°C. Rod-like Na 2 Ti 6 O 13 is recrystallized from the amorphous cluster at 700°C-800°C and becomes plate-like after annealing at 900°C via a parallel assembly of Na 2 Ti 6 O 13 rods. An additional Na 2 Ti 3 O 7 phase appears at high temperatures, exhibiting a relatively higher Na/Ti ratio. R. Riman-contributing editorManuscript No. 30352.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Morphology, Chemical Composition and Phase Transformation of Hydrothermal Derived Sodium Titanate

Zuo

2012

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

show abstract

Nanorods

Jeevanandam¹

2009

Nanoscale Materials in Chemistry

View full text Add to dashboard Cite

show abstract

Synchronous Densification and Conductivity Modulation of Nano‐Titanate for Pseudocapacitive Li‐ion Storage

Zhu,

She,

Wang

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Nanostructured electrode materials have attracted enormous attention because of their kinetic advantages endorsed by nanoscale regime. Densification is required to improve their volumetric densities for practical applications but is challenged by the loss of kinetic features. In this work, a nano‐densification strategy is developed by co‐sintering nanosized titanate with a phosphate agent and acid‐treated carbon black. Experimental studies reveal that the formation of Ti─O─P bonds energetically facilitates the dissociation of crystal water in titanate, enabling lower‐temperature consolidation of the nanostructures that avoids grain growth. Simultaneously, phosphorylation improves charge carrier concentration and electron conductivity of the titanate. Together with the incorporation of hydrophilic carbon black, the treated nano‐titanate electrode reaches a bulk‐level compaction density of 2.35 g cm−3. As an anode for Li‐ion batteries, the densified electrode shows improved electrochemical performance with a specific capacity of 88.4 mA h g−1 at 20 A g−1. When pairing with a high‐voltage LiNi0.5Mn1.5O4 cathode, the hybrid device demonstrates an outstanding combination of energy and power densities.Open access publishing facilitated by The University of Queensland, as part of the Wiley ‐ The University of Queensland agreement via the Council of Australian University Librarians.

show abstract

Structural transformation from NaHTi3O7 nanotube to Na2Ti6O13 nanorod

Cited by 41 publications

References 23 publications

Morphology, Chemical Composition and Phase Transformation of Hydrothermal Derived Sodium Titanate

Morphology, Chemical Composition and Phase Transformation of Hydrothermal Derived Sodium Titanate

Nanorods

Synchronous Densification and Conductivity Modulation of Nano‐Titanate for Pseudocapacitive Li‐ion Storage

Contact Info

Product

Resources

About