Bottom‐Up Preparation of Ultrathin 2D Aluminum Oxide Nanosheets by Duplicating Graphene Oxide

Huang, Zhifeng; Zhou, Anan; Wu, Jifeng; Chen, Yunqiang; Lan, Xiaoli; Bai, Hua; Li, Lei

doi:10.1002/adma.201504484

Cited by 77 publications

(55 citation statements)

References 41 publications

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“…S1†) showed no characteristic peak, indicative of the amorphous feature for pATH which was in line with the previous report. 20 The SEM image of commercial ATH is shown in Fig. S2 †.…”

Section: Resultsmentioning

confidence: 99%

“…37 We postulated that this provides an abundance of H-bonding and coordination sites that stimulate the coating of aluminum hydroxide on the ZIF-8 surface, which is similar to the report that aluminum hydroxide coated on graphene and cloned the morphology of the nanosheet. 20,38 With the hydrolysis proceeding, a large amount of H + was produced. The high H + concentration gradient gave rise to severe agglomeration of the ZIF-8 particles which generated a number of monoliths.…”

Section: Resultsmentioning

confidence: 99%

“…These results illustrated that only amorphous hydroxide afforded the fascinating nanoporous microstructure, which is in line with the previous report. 20 …”

Section: Resultsmentioning

confidence: 99%

“…After the removal of the graphene oxide by calcination, alumina nanosheets were obtained. 20 We named this method the “amorphous replica method”. However, the application of such a method remains in its infancy, since no follow-up report has emerged to date.…”

Section: Introductionmentioning

confidence: 99%

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Interfacial engineering of renewable metal organic framework derived honeycomb-like nanoporous aluminum hydroxide with tunable porosity

et al. 2017

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“…S1†) showed no characteristic peak, indicative of the amorphous feature for pATH which was in line with the previous report. 20 The SEM image of commercial ATH is shown in Fig. S2 †.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…These results illustrated that only amorphous hydroxide afforded the fascinating nanoporous microstructure, which is in line with the previous report. 20 …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Interfacial engineering of renewable metal organic framework derived honeycomb-like nanoporous aluminum hydroxide with tunable porosity

et al. 2017

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“…The uniform distribution of thin Ta-aquo-complex layer on GO nanosheets is critical for the formation of the ultrathin Ta 3 N 5 nanomeshes. [16] After removing the GO template by calcination, the obtained TaO x remains the 2D morphology with many small holes of 2-5 nm distributed on the sheets (Figure 4c,d; Figure S3, Supporting Information). The corresponding SAED patterns exhibit a low crystal degree of 2D-TaO x nanosheets (inset in Figure 4d) and no sharp peaks are observed in the XRD pattern of 2D-TaO x nanosheets, suggesting the low crystalline degree of 2D-TaO x nanosheets ( Figure S5, Supporting Information).…”

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confidence: 99%

Single‐Crystalline Nanomesh Tantalum Nitride Photocatalyst with Improved Hydrogen‐Evolving Performance

Xiao

Luo

Lyu

et al. 2017

Advanced Energy Materials

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alignment and excellent interfacial contact. [8] By contrast, carefully engineering the nanostructure of Ta 3 N 5 with good crystallinity to shorten the migration length of charge carriers and provide more reactive sites may open up new opportunities for efficient water splitting.Over the past decade, enlightened by the breakthrough of graphene, [9] 2D nanomaterials have attracted increasing research-attention in the field of energy storage and conversion because they possess advantages of large specific surface area, high ratio of surface atoms, and facile charge transport behaviour. [10] However, the amount of catalytic active sites in 2D nanosheets is still confined due to the limited boundaries and exposed edges. It has been demonstrated that constructing 2D nanosheets with abundant and well-distributed pores, or namely, nanomeshes, can solve this problem and greatly improve the catalytic performance. [11] Unfortunately, the construction of ultrathin nanomeshes is mainly limited to the materials with layered structure, such as graphene, boron nitride, and layered double hydroxides. [11a,12] The fabrication of ultrathin nanomeshes for the nonlayered and transition metalbased materials such as Ta 3 N 5 with potentially high catalytic activity is of great challenge.Herein, we innovatively synthesize ultrathin single-crystalline Ta 3 N 5 nanomeshes using graphene oxide (GO) nanosheets as a 2D template. Remarkably, the obtained 2D Ta 3 N 5 nanomeshes with a lateral size of several micrometres and an average thickness of ≈2 nm show large aspect ratios, high specific surface area (284.6 m 2 g −1 ), and excellent crystallinity. The interplane pores provide numerous new active edges which can greatly speed up mass transfer and charge migration. Furthermore, the high crystallinity is also beneficial for charge separation. By loading 1 wt% of Pt as cocatalysts, the Ta 3 N 5 nanomeshes exhibit over tenfold improvement of solar hydrogen production when compared to its bulk counterpart. [1b] This work provides a novel strategy for designing 2D ultrathin nanomesh structures for nonlayered materials with improved photocatalytic activity.As shown in Figure 1, Ta 3 N 5 nanomeshes were synthesized via a bottom-up process using GO as a template. First, a thin layer of amorphous Ta-aquo-complex was uniformly deposited on the GO sheets by a homogeneous hydrolysis process of TaCl 5 , yielding GO/Ta-aquo-complex composite nanosheets. Then, the GO template was removed using a calcination procedure to obtain 2D-TaO x nanosheets. Finally, the Tantalum nitride (Ta 3 N 5 ) with a suitable bandgap (≈2 eV) is regarded as one of the most promising photocatalysts for efficient solar energy harvesting and conversion. However, Ta 3 N 5 suffers from low hydrogen production activity due to the low carrier mobility and fast carrier recombination. Thus, the design of Ta ) and excellent crystallinity by an innovative bottom-up graphene oxide templated strategy. The resulting Ta 3 N 5 nanomeshes demonstrate drastically improved electron trans...

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Two‐Dimensional Non‐Layered Materials: Synthesis, Properties and Applications

Wang

Shifa

et al. 2016

Adv Funct Materials

185

150

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Holding novel physical properties, high flexibility and strong integration ability with Si‐based electronic devices, two‐dimensional (2D) non‐layered materials have received considerable attentions in recent years. To achieve the 2D anisotropic growth, various strategies have been developed. And a variety of applications have been demonstrated. This review provides an overview on the recent progress of this material family. The scope will cover the preparation strategies, including dry methods and wet chemical approaches, as well as the applications in catalysis, energy conversion and storage, optoelectronic devices and topological crystalline insulators. Conclusion and future perspectives are also given.

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Bottom‐Up Preparation of Ultrathin 2D Aluminum Oxide Nanosheets by Duplicating Graphene Oxide

Cited by 77 publications

References 41 publications

Interfacial engineering of renewable metal organic framework derived honeycomb-like nanoporous aluminum hydroxide with tunable porosity

Interfacial engineering of renewable metal organic framework derived honeycomb-like nanoporous aluminum hydroxide with tunable porosity

Single‐Crystalline Nanomesh Tantalum Nitride Photocatalyst with Improved Hydrogen‐Evolving Performance

Two‐Dimensional Non‐Layered Materials: Synthesis, Properties and Applications

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