Large-scale synthesis of metastable TiO2(B) nanosheets with atomic thickness and their photocatalytic properties

Xiang, Guolei; Li, Tianyang; Zhuang, Jing; Wang, Xun

doi:10.1039/c0cc02327b

Cited by 216 publications

(182 citation statements)

References 21 publications

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“…Synthesis.-Nanocrystalline TiO 2 (B) was synthesized following a recently reported method by Xiang et al 61 Briefly, TiCl 3 (SigmaAldrich, 99.995%) was hydrolyzed under argon atmosphere using a mixture of ethylene glycol (Sigma-Aldrich, 99.8%) and deionized water. 61 In a typical synthesis, 0.3 g of TiCl 3 were dissolved in 38 mL ethylene glycol and 2 mL deionized water.…”

Section: Methodsmentioning

confidence: 99%

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Nanocrystalline TiO₂(B) as Anode Material for Sodium-Ion Batteries

Wu¹,

Bresser²,

Buchholz³

et al. 2014

J. Electrochem. Soc.

111

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High surface area, nanostructured, and phase-pure TiO 2 (B) noodles-like secondary particles were successfully synthesized by a facile one-pot synthesis, based on the hydrolysis of TiCl 3 using a mixture of ethylene glycol and water at moderate temperature. The primary nanoparticles have a uniform size and are about 15 nm in diameter as determined by TEM analysis and exhibit an increased exposure of the (010) facet as indicated by XRD analysis. Unlike the electrochemical reaction with lithium, the application as sodiumion electrode material reveals substantial differences, including the initial amorphization of the TiO 2 (B) particles, accompanied by a partial irreversibility of the sodium storage, presumably related to sodium trapping inside the active material particles and the absence of a stable solid electrolyte interphase, as indicated by galvanostatic cycling and electrochemical impedance spectroscopy, respectively. Besides, TiO 2 (B)-based electrodes show a stabilized reversible capacity of about 100 mAh g −1 and a very good C rate capability. While sodium-ion batteries were initially considered only as lowcost alternative for lithium-ion batteries with a particular focus on their application as stationary energy storage devices, 1-3 recent developments indicated that such devices might provide even similar energy densities in case suitable cathode and anode active materials are combined. [4][5][6] However, particularly regarding the anode side, the identification of long-term stable, environmentally friendly, and abundant active materials, providing high specific capacities and operating at a reasonably low potential, is still considered to be one of the major challenges for this technology. 4,6,7 47 Among these, the best results in terms of specific capacity, long-term cycling stability, and high rate capability were certainly reported for anatase TiO 2 . [40][41][42][43] However, the reversible sodium storage mechanism is obviously different from the classic (de-)insertion mechanism known for lithium, [48][49][50][51][52][53] as an initial reduction of TiO 2 to metallic titanium and an amorphous sodium titanate occurs. 42 TiO 2 (B) is a very well performing anode material for lithium-ion applications, 54-60 but so far -to the best of our knowledge -only one study reported its application as sodium-ion active material. The electrochemical performance, which might be best described by a rather rapid initial capacity fading and a low reversible capacity of about 50 mAh g −1 , is certainly not that promising, 47 although this might be also related to the cut-off potentials of 3.0 and 0.8 V vs. Na/Na + . Besides, the authors observed a rather huge expansion of the (001) 3+ and Ti 4+ at the nanotubes surface, while the general morphology of the tubes remained after sodiation. Consequently, a solid solution mechanism for the reversible sodium ion (de-)insertion comparable to the lithium ion storage mechanism was proposed.Herein, however, we show that TiO 2 (B) -similarly to anatase TiO 2 -presents a rath...

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Section: Methodsmentioning

confidence: 99%

“…61 In a typical synthesis, 0.3 g of TiCl 3 were dissolved in 38 mL ethylene glycol and 2 mL deionized water. This mixture was then transferred to a 50 mL Teflon-lined autoclave.…”

Section: Methodsmentioning

confidence: 99%

Nanocrystalline TiO₂(B) as Anode Material for Sodium-Ion Batteries

Wu¹,

Bresser²,

Buchholz³

et al. 2014

J. Electrochem. Soc.

111

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“…The Cu nanowires were first uniformly coated with a layer of TiO 2 (B) through a solvothermal process with ethylene glycol as the solvent and TiCl 3 as the precursor. 30 By precisely controlling the reaction time, well-defined TiO 2 (B) nanosheets were formed, giving rise to Cu@TiO 2 (B) core-shell structures. Owing to their high reactivity, the Cu nanowires were gradually oxidized and removed in the acidic solution during the prolonged solvothermal treatment.…”

Section: View Article Onlinementioning

confidence: 99%

Hierarchical tubular structures constructed from ultrathin TiO₂(B) nanosheets for highly reversible lithium storage

Gao

et al. 2015

Energy Environ. Sci.

190

120

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Broader contextLithium ion batteries (LIBs) have become the dominant power source for portable electronics and have great potential to power electrical vehicles in the near future. To meet the requirements for use in high-power applications, battery electrodes that can deliver capacitor-like rateperformances are in high demand. TiO 2 (B) with favorable open channels allows lithiation/delithiation in an interesting pseudocapacitive manner. The electrochemical performance of TiO 2 (B) electrodes can be effectively enhanced by engineering nanostructures. However, TiO 2 (B) is a less stable phase and it is highly challenging to synthesize TiO 2 (B) electrode materials with desired nanostructures. In this work, we report the synthesis of hierarchical tubular structures constructed from TiO 2 (B) nanosheets through an efficient Cu nanowire templated solvothermal method. Benefiting from unique structural features, the as-obtained TiO 2 (B) hierarchical tubular structures show excellent electrochemical lithium storage properties with a high capacity, excellent rate capability and cycling stability.

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“…217 However, in sharp contrast, ultrathin TiO 2 NSs showed a high catalytic activity as a result of a shorter migration time, which suppressed recombination. 218 Fig. 21a shows the process of producing photogenerated electrons and holes at the TiO 2 surface, where Pt acts as an electron skin (Fig.…”

Section: Two-dimensional Nanostructuresmentioning

confidence: 99%

Review of one-dimensional and two-dimensional nanostructured materials for hydrogen generation

Babu

Vempati

Uyar

et al. 2015

Phys. Chem. Chem. Phys.

161

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Hydrogen is an attractive alternative to fossil fuels in terms of environmental and other advantages. Of the various production methods for H 2 , photocatalysis requires further development so that it can be applied economically on an industrial scale. One-and two-dimensional nanostructures in both pristine and modified forms have shown great potential as catalysts in the generation of H 2 . We review here recent developments in these nanostructure catalysts and their efficiency in the generation of H 2 under UV/visible/simulated solar light. Despite much research effort, many photocatalysts do not yet meet the practical requirements for the generation of H 2 , such as visible light activity. H 2 production is dependent on a variety of parameters and factors. To meet future energy demands, several challenges in H 2 production still need to be solved. We address here the factors that influence the efficiency of H 2 production and suggest alternatives. The nanostructures are classified based on their morphology and their efficiency is considered with respect to the influencing parameters. We suggest effective ways of engineering catalyst combinations to overcome the current performance barriers.

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Large-scale synthesis of metastable TiO2(B) nanosheets with atomic thickness and their photocatalytic properties

Cited by 216 publications

References 21 publications

Nanocrystalline TiO₂(B) as Anode Material for Sodium-Ion Batteries

Nanocrystalline TiO₂(B) as Anode Material for Sodium-Ion Batteries

Hierarchical tubular structures constructed from ultrathin TiO₂(B) nanosheets for highly reversible lithium storage

Review of one-dimensional and two-dimensional nanostructured materials for hydrogen generation

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Large-scale synthesis of metastable TiO2(B) nanosheets with atomic thickness and their photocatalytic properties

Cited by 216 publications

References 21 publications

Nanocrystalline TiO2(B) as Anode Material for Sodium-Ion Batteries

Nanocrystalline TiO2(B) as Anode Material for Sodium-Ion Batteries

Hierarchical tubular structures constructed from ultrathin TiO2(B) nanosheets for highly reversible lithium storage

Review of one-dimensional and two-dimensional nanostructured materials for hydrogen generation

Contact Info

Product

Resources

About

Nanocrystalline TiO₂(B) as Anode Material for Sodium-Ion Batteries

Nanocrystalline TiO₂(B) as Anode Material for Sodium-Ion Batteries

Hierarchical tubular structures constructed from ultrathin TiO₂(B) nanosheets for highly reversible lithium storage