Acid-salt treated CoAl layered double hydroxide nanosheets with enhanced adsorption capacity of methyl orange dye

Chen, Yuxiang; Jing, Chuan; Zhang, Xing; Jiang, Dagang; Liu, Xiao Ying; Dong, Biqin; Feng, Li; Li, Shaochun; Zhang, Yuxin

doi:10.1016/j.jcis.2019.03.107

Cited by 96 publications

(33 citation statements)

References 59 publications

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“…MO onto LDH-S was higher than that onto other materials (Table S1 in supporting information), expecting that LDH with small particle size is an excellent adsorbent of water pollution. Even the previously reported hybrid LDH adsorbent such as graphene-LDH (Zheng et al, 2019), carboxylate-LDH (Zhu et al, 2014), Fe2O3-doped LDH (Cheng et al, 2019) and Cl-Co4Al-LDH (Chen et al, 2019) exhibited less adsorption amount (438, 476, 577 and 801 mg/g-LDH, respectively) than the LDH-S in current study.…”

Section: Methyl Orange (Mo) Adsorptioncontrasting

confidence: 64%

“…As it is thought that the LDHs form laminated particles in aqueous systems, maximum utilization of the laminated structure expects effective removal of the anionic pollutants (Cheng et al, 2019;Zhu et al, 2014). In previous study, the adsorption of methyl orange (MO) onto carboxylate-CuZn-LDH (476 mg/g-LDH) (Zhu et al, 2014), Fe2O3 doped nitrate-MgAl-LDH (577 mg/g-LDH) (Cheng et al, 2019) and Cl-Co4Al-LDH (801 mg/g-LDH) (Chen et al, 2019) was reported. In these cases, the adsorption followed the Langmuir isotherm, indicating that the intercalation of MO into the interlayer nanospace did not occur effectively despite of exchangeable carboxylate, nitrate and chloride.…”

Section: Introductionmentioning

confidence: 99%

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Systematic utilization of layered double hydroxide nanosheets for effective removal of methyl orange from an aqueous system by π-π stacking-induced nanoconfinement

Yamaguchi

Salles

et al. 2021

Journal of Environmental Management

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Systematic utilization of carbonated Mg-Al layered double hydroxide (LDH) nanosheets on methyl orange removal was investigated with a respect to particle dimension. LDHs with smallest dimension were synthesized carefully to have a small lateral size as well as high dispersibility. The other particles with medium and large sizes were prepared by hydrothermal treatment and urea hydrolysis to have larger size and higher crystallinity. According to kinetics and isotherm analyses, the smallest sized LDH showed effective adsorption of methyl orange (1250 mg/g-LDH) which was remarkable higher than the other LDHs with the larger lateral sizes. Compared with the larger lateral sized LDHs, the small sized ones were verified to utilize all the accessible adsorption sites of the nanosheets generating nanoconfinement of the methyl orange molecules. Transmission electron microscopy (TEM) and powder X-ray diffraction (PXRD) patterns definitely indicated that the LDHs with ~40 nm of the lateral dimension could fully utilize the interlayer nanospace of the LDH. Monte-Carlo simulation suggested the intercalated methyl orange could be stabilized not only through electrostatic interaction with the LDH layer but also by π-π stacking between the methyl orange molecules, which is thought to be the driving force to replace carbonate anion.

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Section: Methyl Orange (Mo) Adsorptioncontrasting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Systematic utilization of layered double hydroxide nanosheets for effective removal of methyl orange from an aqueous system by π-π stacking-induced nanoconfinement

Yamaguchi

Salles

et al. 2021

Journal of Environmental Management

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“…In comparison with the in situ CoAl-LDH/Cu-(tpa) MOF nanocomposite, the direct precipitation exhibits aggregation and poor dispersion of the Cu-(tpa) MOF particles with the CoAl-LDH. The CoAl-LDH/Cu-(tpa) MOF nanocomposite also exhibits much improved dye removal efficiency in comparison to reported adsorbents, as summarized in Table . − ,, …”

Section: Resultsmentioning

confidence: 87%

“…The CoAl-LDH/Cu-(tpa) MOF nanocomposite also exhibits much improved dye removal efficiency in comparison to reported adsorbents, as summarized in Table 1. [7][8][9][10]68,69 The adsorption phenomenon is further explained by postadsorption PXRD, FESEM, and FTIR analyses (Figure S13). The PXRD result in Figure S13a shows the decrease in the intensity of basal (003) reflection of NO 3 − -intercalated CoAl-LDH that indicates the more disordered LDH layers after dye adsorption.…”

Section: Resultsmentioning

confidence: 95%

Selective Removal of Anionic Dyes by Metal–Organic Framework-Anchored CoAl-Layered Double Hydroxide Nanosheets

Chakraborty

Acharya

2021

ACS Appl. Nano Mater.

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A copper terephthalate metal organic framework-anchored CoAllayered double hydroxide nanocomposite [CoAl-LDH/Cu-(tpa) MOF] was synthesized by in situ nucleation and growth of crystalline Cu-(tpa) MOF on hexagonal LDH sheets. Successive ion exchange of carbonate-intercalated CoAl-LDH by chloride and terephthalate anions yielded CoAl-(tpa) LDH. The "tpa" ions de-intercalated and coordinated with the Cu 2+ ions for in situ growth of Cu-(tpa) MOF on LDH nanosheets retaining crystallinity, uniformity, and platelet morphology. The structure and properties of the synthesized materials were studied by powder X-ray diffraction analysis, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, optical spectroscopy, thermal gravimetric analysis, X-ray photoelectron spectroscopy, and N 2 adsorption−desorption isotherms analysis. The CoAl-LDH/Cu-(tpa) MOF nanocomposite exhibited selective adsorption of anionic dyes. The dye adsorption performance of the nanocomposite was investigated under various parameters such as initial dye concentration, adsorbent dosage, pH of dye solution, temperature of dye solution, and contact time. Adsorption kinetics followed a pseudo first order kinetic model, and the equilibrium adsorption data fitted well to the Langmuir isotherm model with a maximum dye adsorption capacity of 666 mg g −1 for the anionic methyl orange dye. The endothermic nature of the adsorption process was elucidated from a thermodynamic study, and the resulting energy of adsorption was 19.37 kJ mol −1 . Furthermore, the CoAl-LDH/Cu-(tpa) MOF nanocomposite adsorbent could be regenerated for six successive cycles with no significant loss in efficiency and exploited as the potential candidate for selective removal of anionic dyes in the field of wastewater treatment.

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“…The pH-dependent colloidal stability of CoAl-LDH dispersions in the pH range from 3 to 10 was discussed by the same authors in another report [117], showing that the suspension was most stable at pH 3, due to the protonation of the OH groups resulting in repulsion forces between LDH platelets, positively charged on both basal and edge surfaces. It is worth pointing out that both stronger acid and basic conditions (i.e., pH < 3 and pH > 10) lead to LDH structural dissolution [118,119]. In the case of deposition of droplets at pH 3 (where LDHs are well dispersed), a central hole was observed in the LDH deposit (see Figure 7a), along with a ring of higher thickness at 0.6 r from the center (where r is the radius of the droplet).…”

Section: Life-like Clays Based Artificial Compartmentsmentioning

confidence: 99%

Layered Double Hydroxides in Bioinspired Nanotechnology

et al. 2020

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Layered Double Hydroxides (LDHs) are a relevant class of inorganic lamellar nanomaterials that have attracted significant interest in life science-related applications, due to their highly controllable synthesis and high biocompatibility. Under a general point of view, this class of materials might have played an important role for the origin of life on planet Earth, given their ability to adsorb and concentrate life-relevant molecules in sea environments. It has been speculated that the organic–mineral interactions could have permitted to organize the adsorbed molecules, leading to an increase in their local concentration and finally to the emergence of life. Inspired by nature, material scientists, engineers and chemists have started to leverage the ability of LDHs to absorb and concentrate molecules and biomolecules within life-like compartments, allowing to realize highly-efficient bioinspired platforms, usable for bioanalysis, therapeutics, sensors and bioremediation. This review aims at summarizing the latest evolution of LDHs in this research field under an unprecedented perspective, finally providing possible challenges and directions for future research.

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Acid-salt treated CoAl layered double hydroxide nanosheets with enhanced adsorption capacity of methyl orange dye

Cited by 96 publications

References 59 publications

Systematic utilization of layered double hydroxide nanosheets for effective removal of methyl orange from an aqueous system by π-π stacking-induced nanoconfinement

Systematic utilization of layered double hydroxide nanosheets for effective removal of methyl orange from an aqueous system by π-π stacking-induced nanoconfinement

Selective Removal of Anionic Dyes by Metal–Organic Framework-Anchored CoAl-Layered Double Hydroxide Nanosheets

Layered Double Hydroxides in Bioinspired Nanotechnology

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