Hollow LDH nanowires as excellent adsorbents for organic dye

Chen, Libao; Li, Cheng Chao; Wei, Yuehua; Zhou, Gang; Pan, Anqiang; Wei, Weifeng; Huang, Baoyu

doi:10.1016/j.jallcom.2016.05.344

Cited by 44 publications

(14 citation statements)

References 42 publications

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“…The nanowires with large specic surface area shorten the diffusion distance of carriers, which facilitates efficient and rapid delivery of gases to active sites for quick adsorption and desorption. 30,31 This network of ultra-thin nanowires also ensured a maximum exposure of active metal ions to gas. 32 In addition, the interlayer of multilayer expanded graphite could accommodate large volume changes of nanowires, avoiding collapse or deformation during repeated adsorption and desorption.…”

Section: Morphology and Structure Characterizationsmentioning

confidence: 99%

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NO_x gas detection at room temperature

Zhang

Ikram

et al. 2019

RSC Adv.

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Section: Morphology and Structure Characterizationsmentioning

confidence: 99%

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NO_x gas detection at room temperature

Zhang

Ikram

et al. 2019

RSC Adv.

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“…LDH is one kind of anionic clay which has inter‐layer structure . LDH exhibits admirable adsorption ability towards anionic pollutants because of the anion in the inter‐layer can be exchanged by other anions .…”

Section: Introductionmentioning

confidence: 98%

Phosphate uptake behavior and mechanism analysis of facilely synthesized nanocrystalline Zn‐Fe layered double hydroxide with chloride intercalation

Yang

Liu

Lǚ

et al. 2018

Surface & Interface Analysis

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Zn-Fe layered double hydroxide with chloride intercalation (ZFCL) was synthesized by a coprecipitation method at room temperature. ZFCL was characterized by N 2 adsorptiondesorption isotherms, X-ray diffraction, scanning electron microscope, Zeta-sizer analyzer, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The results showed that ZFCL had large surface area and layered structure. The maximum adsorption capacity of ZFCL was 150.6 mg/g at 25°C. That was higher than most other adsorbent which were reported. The kinetic data were described better by the pseudo-second-order adsorption kinetic rate model. The adsorption isotherm on the adsorbent was described by Langmuir, Freundlich, and Sips models at pH 6 and followed the fitting order: Sips >Freundlich>Langmuir. Thermodynamic analyses indicated that the phosphate adsorption on ZFCL was endothermic and spontaneous in nature. The sequence of coexisting cations and anions competing with phosphate was Ca 2+ > Mg 2+ > Na + and SO 4 2− > NO 3 − > Cl − . ZFCL can be regenerated by the sequential use of NaOH and ZnCl 2 . The adsorption capacity remained high as 108.6 mg/g after regeneration of 3 times. The results of zeta potential, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy analyses indicated that the phosphate adsorption mechanisms involved ion exchange, Zn 3 (PO 4 ) 2 precipitation, and the formation of inner-sphere complex via replacement of surface hydroxyl groups by phosphate.

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“…Various physico-chemical methods like solvent extraction, coagulation, photocatalytic degradation and biodegradation are used for their removal [4]. Among these, adsorption is conventional but efficient technique for dye removal [5].…”

Section: Introductionmentioning

confidence: 99%

“…Activated carbon is the most widely used adsorbent but alternative cost-effective and nonconventional adsorbents including natural materials, nanoporous silica, porous metal oxides and hydroxides, as well as waste materials from industry and agriculture have also been proposed [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Room-temperature fabrication of core-shell nano-ZnO/pollen grain biocomposite for adsorptive removal of organic dye from water

Tzvetkov

Kaneva

Spassov

2017

Applied Surface Science

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A new core-shell nano-ZnO/pollen grain (n-ZnO/PG) biocomposite have been successfully synthesized via simple and low-temperature two-step liquid precipitation method. The synthetic strategy consists of grafting the surface of pine pollen grains (PG) with Zn 2+-organic complexes followed by a treatment in Zn(CH3COO)2/NaOH solution, thus producing a closed n-ZnO shell around the organic core, with a thickness of ~450 nm. Scanning electron microscopy, X-ray diffraction, FTIR, XPS and UV-vis spectroscopy measurements along with N2 adsorption/desorption were used to characterize the resulting n-ZnO/PG biocomposite. The asprepared core-shell microparticles are meso-/macro-porous with BET surface area of 25 m 2 g-1 and total pore volume of 0.26 cm 3 g-1. The adsorption properties of n-ZnO/PG were evaluated through adsorption of Malachite Green (MG) from aqueous medium at room temperature (25 °C). For the sake of comparison, the physico-chemical and adsorptive properties of the raw PG and pure n-ZnO were also examined. Results indicate that n-ZnO/PG is the most favorable for the adsorption of MG under the conditions used in this study. The adsorption kinetic data for PG, n-ZnO and n-ZnO/PG follow the pseudo-second order equation and the maximum adsorption capacity follows an order of n-ZnO/PG > n-ZnO > PG. For n-ZnO/PG an adsorption uptake up to 145.9 mg g-1 is observed. The as-prepared core-shell biocomposite material is a promising cost-effective and environmentally friendly adsorbent due to its textural properties, surface chemistry, adsorption capacity and recyclability.

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Hollow LDH nanowires as excellent adsorbents for organic dye

Cited by 44 publications

References 42 publications

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NO_x gas detection at room temperature

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NO_x gas detection at room temperature

Phosphate uptake behavior and mechanism analysis of facilely synthesized nanocrystalline Zn‐Fe layered double hydroxide with chloride intercalation

Room-temperature fabrication of core-shell nano-ZnO/pollen grain biocomposite for adsorptive removal of organic dye from water

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Hollow LDH nanowires as excellent adsorbents for organic dye

Cited by 44 publications

References 42 publications

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NOx gas detection at room temperature

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NOx gas detection at room temperature

Phosphate uptake behavior and mechanism analysis of facilely synthesized nanocrystalline Zn‐Fe layered double hydroxide with chloride intercalation

Room-temperature fabrication of core-shell nano-ZnO/pollen grain biocomposite for adsorptive removal of organic dye from water

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Product

Resources

About

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NO_x gas detection at room temperature

Expanded graphite/NiAl layered double hydroxide nanowires for ultra-sensitive, ultra-low detection limits and selective NO_x gas detection at room temperature