The effective removal of nickel ions from aqueous solution onto magnetic multi-walled carbon nanotubes modified by β-cyclodextrin

Lin, Shuai; Zou, Changjun; Liang, Hao; Peng, Hong; Liao, Yanling

doi:10.1016/j.colsurfa.2021.126544

Cited by 60 publications

(15 citation statements)

References 40 publications

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“…Taking qPBN-CA 40 AEM as a representative (Figure ), a slight weight loss occurred before 120 °C, which is ascribed to the evaporation of trapped water . The subsequent weight loss (170–400 °C) results from the decomposition of CD, adamantane, and piperidinium groups. ,, The third stage of weight loss was observed at about 400 °C, where PBN main chain began to degrade . The results demonstrate that qPBN-CAy AEMs are applicable for operating in AEMFCs (below 100 °C).…”

Section: Resultsmentioning

confidence: 84%

“…42 The subsequent weight loss (170−400 °C) results from the decomposition of CD, adamantane, and piperidinium groups. 29,35,43 The third stage of weight loss was observed at about 400 °C, where PBN main chain began to degrade. 31 The results demonstrate that qPBN-CAy AEMs are applicable for operating in AEMFCs (below 100 °C).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Hydrophilic–Hydrophobic Bulky Units Modified Anion Exchange Membranes for Fuel Cell Application

Yuan

et al. 2022

ACS Sustainable Chem. Eng.

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The hydroxide conductivity and alkaline stability play a significant role in the application of an anion exchange membranes (AEMs) fuel cell. These high performances are closely related to the structure of the polymer. Side-chain structure is commonly used to construct microphase separation. On this basis, a new strategy is to incorporate a rigid bulky structure into an AEM to break chain packing and reduce resistance against hydroxide ion transport. In this work, rigid bulky hydrophilic–hydrophobic side-chain grafted, ether-free poly(biphenyl indole) (PBN) AEMs are designed and prepared by chemical incorporation of hydrophilic bulky cyclodextrin and hydrophobic bulky adamantane onto the PBN backbone. The enhanced driving force of microphase separation and the enlarged free volume can make for high hydroxide conductivity. The fabricated AEM with an ion exchange capacity (IEC) of 1.81 mmol g–1 shows a conductivity of 122.0 mS cm–1 at 80 °C, which can be retained by 90% after treatment of the AEM in a 1 M NaOH solution at 80 °C for 1008 h. Its single H2/O2 fuel cell yields a peak power density of 603 mW cm–2 at 60 °C; the fuel cell can maintain 70.2% of its initial voltage after operating for 30 h. This strategy provides a new and effective route for the preparation of AEMs with superior performance.

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Section: Resultsmentioning

confidence: 84%

Section: ■ Results and Discussionmentioning

confidence: 99%

Hydrophilic–Hydrophobic Bulky Units Modified Anion Exchange Membranes for Fuel Cell Application

Yuan

et al. 2022

ACS Sustainable Chem. Eng.

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“…The physical adsorption methods were widely used for removing pollutants from water due to the high efficiency, low energy consumption, simple process, and low cost [20][21][22][23][24][25]. Functional materials with porous structures have attracted many interests for adsorbing specific compounds, as they could provide a huge surface area and excellent adsorption capability [26,27].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Diatomite/β-Cyclodextrin Composite and Application for the Adsorption of Diphenolic Acid from Wastewater

et al. 2022

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Diphenolic acid (DPA) is a kind of endocrine-disrupting compound, which brings serious health problems to humans and animals. An eco-friendly and cost-effective adsorbent was prepared through a simple method, in which the β-Cyclodextrin(β-CD) was crosslinked onto the surface of diatomite (DA), the as-prepared DA/β-CD composite showed higher adsorption efficiency for DPA than DA as the host–guest interaction between DPA and β-CD. DA is a kind of biosilica with a hierarchical pore structure that provides enough surface area for the DA/β-CD. The surface area and pore size of DA/β-CD were investigated by nitrogen adsorption and desorption. The DA/β-CD composite illustrated a good adsorption capability, and was used for removing DPA from wastewater. The adsorption ratio of DPA could achieve 38% with an adsorption amount of 9.6 mg g−1 under room temperature at pH = 6. The adsorption isotherm curves followed the Langmuir (R2 = 0.9867) and Freundlich (R2 = 0.9748) models. In addition, the regeneration rate of the DA/β-CD was nearly at 80.32% after three cycles of regeneration. These results indicated that the DA/β-CD has the potential for practical removal of the EDC contaminants from wastewater.

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“…[ 9 ], adsorption processes are preferred compared with membrane technology, advanced oxidation processes, photocatalytic degradation, or extraction due to its higher efficiency and lower costs [ 10 , 11 ]. Regardless of the decontamination procedure, two strategies have been remarked in terms of CDs’ derivatives manufacturing, one based on its linking to polymer chains, while the other involved the CDs’ grafting onto carbonaceous or inorganic compounds [ 6 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Bisphenol A Adsorption on Silica Particles Modified with Beta-Cyclodextrins

et al. 2021

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This study presents the synthesis of silica particles bearing two beta-cyclodextrin (BCD) (beta-cyclodextrin-BCD-OH and diamino butane monosubstituted beta-cyclodextrin-BCD-NH2). The successful synthesis of the BCD-modified silica was confirmed by FT-IR and TGA. Using contact angle measurements, BET analysis and SEM characterization, a possible formation mechanism for the generation of silica particles bearing BCD derivatives on their surface was highlighted. The obtained modified silica displayed the capacity to remove bisphenol A (BPA) from wastewater due to the presence of the BCD moieties on the surface of the silica. The kinetic analysis showed that the adsorption reached equilibrium after 180 min for both materials with qe values of 107 mg BPA/g for SiO2-BCD-OH and 112 mg BPA/g for SiO2-BCD-NH2. The process followed Ho’s pseudo-second-order adsorption model sustaining the presence of adsorption sites with different activities. The fitting of the Freundlich isotherm model on the experimental results was also evaluated, confirming the BCD influence on the materials’ adsorption properties.

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The effective removal of nickel ions from aqueous solution onto magnetic multi-walled carbon nanotubes modified by β-cyclodextrin

Cited by 60 publications

References 40 publications

Hydrophilic–Hydrophobic Bulky Units Modified Anion Exchange Membranes for Fuel Cell Application

Hydrophilic–Hydrophobic Bulky Units Modified Anion Exchange Membranes for Fuel Cell Application

Facile Synthesis of Diatomite/β-Cyclodextrin Composite and Application for the Adsorption of Diphenolic Acid from Wastewater

Bisphenol A Adsorption on Silica Particles Modified with Beta-Cyclodextrins

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