Structural evolution of NiAl-based layered nanostructures grown by a low-temperature hydrothermal method

Jeon, Chan-Woo; Lee, Sang-Seok; Park, Il‐Kyu

doi:10.1016/j.apsusc.2018.12.126

Cited by 18 publications

(4 citation statements)

References 20 publications

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“…During this process, each metal (Zn, Ni, or Co) cation from the precursor starts to substitute a large number of Al cations in aluminum hydroxide, forming [M(OH) 6 ] octahedral units. [ 14–16 ] Such a unit prefers to grow in the lateral direction, resulting in stackable positively charged 2D sheet‐like layers (Figure 1a). In addition, [(NO 3 − )·6H 2 O] was intercalated between the 2D layers for charge balancing, completing the stacking LDH formation on the FTO/glass substrate.…”

Section: Resultsmentioning

confidence: 99%

“…This XRD result is in agreement with previous literature and indicates the successful synthesis of the crystalline structure of Al‐based LDHs. [ 14–16 ] Importantly, the LDH morphology and packing density affect the transmittance of the LDH‐coated substrate, as shown in Figure 1e. The transmittance of the vertically stacked ZnAl‐LDH is higher than that of both NiAl‐LDH and CoAl‐LDH, up to ≈87% in the visible range from 400 to 1000 nm.…”

Section: Resultsmentioning

confidence: 99%

“…[ 13 ] In particular, LDH‐based films can be uniformly grown on a large‐scale substrate through a simple and well‐controlled hydrothermal process, regardless of the type of substrate, without requiring a high‐temperature process. [ 14–16 ] Furthermore, in addition to the energy bandgap, the morphology of LDH materials can also be adjusted according to the type of metal cation used during the synthesis, thereby providing electrical and morphological versatility. [ 17–19 ] Based on these merits, they have been widely studied as functional nanomaterials for diverse electrical and chemical applications, including luminescence sources, [ 20 ] nanocomposite hydrogels, [ 21 ] catalysts, [ 22 ] energy storage, [ 23 ] anion‐exchangers, [ 24 ] and chemical nanocontainers.…”

Section: Introductionmentioning

confidence: 99%

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Transparent and Unipolar Nonvolatile Memory Using 2D Vertically Stacked Layered Double Hydroxide

Cho

Jeon

et al. 2021

Adv Materials Inter

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nanoelectronics applications because of their outstanding physical and chemical properties, as well as atomic-scale thickness, light weight, transparency, and flexibility. [1][2][3][4][5][6][7][8][9][10] With this material versatility and superiority, various electronic and optical device applications exploiting 2D materials have been extensively suggested and demonstrated, including transistors, [2] memory, [3] synaptic devices, [4] sensors, [5] supercapacitors, [6] and photodetectors. [7] In addition, based on their chemical functionality and unique structural properties, they can be utilized for particular materials and structures such as photocatalysts, [8] catalytic supports, [9] and membranes for gas separation. [10] Among these, 2D layered double hydroxide (LDH)-based materials can have unique morphological and chemical properties that originate from a stacked 2D nanosheet composed of a positively charged metal hydroxide layer and intercalated charge-balancing anions. [11,12] This stacked 2D nanosheet exhibited excellent charge transferability as a natural ion carrier and good material durability. [13] In particular, LDH-based films can be uniformly grown on a large-scale substrate through a simple and well-controlled hydrothermal process, regardless of the type of substrate, without requiring a high-temperature process. [14][15][16] Furthermore, in addition to the energy bandgap, the morphology of LDH materials can also be adjusted according to the type of metal cation used during the synthesis, thereby providing electrical and morphological versatility. [17][18][19] Based on these merits, they have been widely studied as functional nanomaterials for diverse electrical and chemical applications, including luminescence sources, [20] nanocomposite hydrogels, [21] catalysts, [22] energy storage, [23] anion-exchangers, [24] and chemical nanocontainers. [25] However, despite their excellent charged ion storage, charge trapping, and transfer ability, their potential in switching device applications has rarely been demonstrated as compared with other 2D materials. Recently, Yang et al. reported the bipolar resistive switching behavior of the Ag/ZnAl-LDH/Al foil junction. [26] However, the LDH in this type of junction only plays the role of a solid electrolyte material, not a switching active material.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transparent and Unipolar Nonvolatile Memory Using 2D Vertically Stacked Layered Double Hydroxide

Cho

Jeon

et al. 2021

Adv Materials Inter

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“…It was worth mentioning that HMT severed as the alkali source and anion provider under the hydrothermal process. The possible reaction mechanism can be described as follows: …”

Section: Materials and Methodsmentioning

confidence: 99%

Low Carbonate Contaminative and Ultrasmall NiAl LDH Prepared by Acid Salt Treatment with High Adsorption Capacity of Methyl Orange

Jing

Chen

Zhang

et al. 2019

Ind. Eng. Chem. Res.

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Layered double hydroxides (LDHs) are attracting intense research interests as methyl orange (MO) adsorbent due to the unique anionic exchange ability. Herein, ultrasmall NiAl LDHs with Cl– intercalation were prepared by a facile method combining hydrothermal method with acid salt treatment. As a result, the as-prepared NiAl LDHs displayed favorable removal performance toward MO from aqueous solution due to the negligible carbonate contamination and ultrasmall nanosheets (about 50 nm). The maximum experimental and theoretical adsorption capacities of 853.19 and 900.14 mg g–1 at pH = 7 and T = 298 K for MO were achieved for Ni4Al1–Cl LDH. The adsorption mechanism is dominated by chemisorption, and the adsorption process is spontaneous and endothermic. Possible “intercalation-split mechanism” for MO on NiAl–Cl LDH is proposed to explain the split of (003) plane. The improvement of adsorption capacity indicates that the acid salt treatment is an effective strategy to construct the rapid and high-effective anionic dyes adsorbents.

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Bias-dependent optical and ion incorporation properties of CoAl-layered double hydroxides

Lee

Jeon

Park

2020

Applied Surface Science

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Structural evolution of NiAl-based layered nanostructures grown by a low-temperature hydrothermal method

Cited by 18 publications

References 20 publications

Transparent and Unipolar Nonvolatile Memory Using 2D Vertically Stacked Layered Double Hydroxide

Transparent and Unipolar Nonvolatile Memory Using 2D Vertically Stacked Layered Double Hydroxide

Low Carbonate Contaminative and Ultrasmall NiAl LDH Prepared by Acid Salt Treatment with High Adsorption Capacity of Methyl Orange

Bias-dependent optical and ion incorporation properties of CoAl-layered double hydroxides

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