Novel polyethyleneimine functionalized chitosan–lignin composite sponge with nanowall-network structures for fast and efficient removal of Hg(<scp>ii</scp>) ions from aqueous solution

Zhang, Dan; Wang, Lan; Zeng, Hehua; Rhimi, Baker; Wang, Chuanyi

doi:10.1039/c9en01368g

Cited by 70 publications

(49 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[72] A porous sponge has also be prepared by freezedrying, during which the chitosan solution or gel is frozen then lyophilized. [21,44] Chemical modification of chitosan, such as crosslinking and grafting, does not alter the core skeleton of chitosan, but generates new properties allowing higher adsorption capacity and efficiency. [73,74] Many chitosan derivatives have been synthesized by grafting new functional groups on the chitosan backbone to adsorb metal ions.…”

Section: Modification Of Chitosanmentioning

confidence: 99%

“…[21] Polyethyleneimine is added after the chitosan and polyvinyl alcohol are mixed, then the mixture is mechanically stirred. [44] Figures 3a and 3b show the digital and microscopic photos of the composite sponge, highlighting that the sponge has an uneven and dense porous structure. The scanning electron microscope (SEM) image further proves that the composite sponge has an interconnected porous structure.…”

Section: Polyethyleneimine-functionalized Chitosan-lignin Composite Smentioning

confidence: 99%

Section: Hyperbranched Polyethylenimine-functionalized Carboxymethyl mentioning

confidence: 99%

“…showing that the sponge keeps a stable three-dimensional network structure. [44] Copyright © 2020 Royal Society of Chemistry. clearly show that the two samples exhibited typical type-IV Stype curve.…”

Section: Hyperbranched Polyethylenimine-functionalized Carboxymethyl mentioning

confidence: 99%

“…[43] Modified chitosan generally has multiple functional groups such as amino groups, hydroxyl groups, carboxyl groups and thiols. [44] Upon hydrogen bonding these groups form cage-like chelates, which may complex metal ions. [45] The adsorption process starts by diffusion of metal ions to adsorbents followed by surface reactions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Zhang

Crini

Lichtfouse

et al. 2020

The Chemical Record

Self Cite

View full text Add to dashboard Cite

Abatement of mercury emissions in air and waters has become a global challenge due to the toxicity of mercury species for life, yet actual remediation techniques are limited. In particular, adsorption of mercury ions onto solids is widely used but most adsorption techniques are not specific, and in turn, removal efficiency is lower. Adsorbents developed so far include activated carbon, clay, bentonite, cellulose and chitosan. Chitosan derivatives have recently attracted research attention for water purification because their molecular frames contain a large amount of À NH 2 and À OH groups that can chelate with metal ions specifically. This manuscript reviews recent advances in chitosan-based adsorbents designed to remove mercury ions from wastewater. Focus is placed on their design, synthesis, characterization, adsorption properties, adsorption mechanisms and applications.

show abstract

Section: Modification Of Chitosanmentioning

confidence: 99%

Section: Polyethyleneimine-functionalized Chitosan-lignin Composite Smentioning

confidence: 99%

Section: Hyperbranched Polyethylenimine-functionalized Carboxymethyl mentioning

confidence: 99%

Section: Hyperbranched Polyethylenimine-functionalized Carboxymethyl mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Zhang

Crini

Lichtfouse

et al. 2020

The Chemical Record

Self Cite

View full text Add to dashboard Cite

show abstract

Reusable Polyacrylonitrile‐Sulfur Extractor of Heavy Metal Ions from Wastewater

Peng

Jiang

Barr

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Mercury, lead, and cadmium are among the most toxic and carcinogenic heavy metal ions (HMIs), posing serious threats to the sustainability of aquatic ecosystems and public health. There is an urgent need to remove these ions from water by a cheap but green process. Traditional methods have insufficient removal efficiency and reusability. Structurally robust, large surface‐area adsorbents functionalized with high‐selectivity affinity to HMIs are attractive filter materials. Here, an adsorbent prepared by vulcanization of polyacrylonitrile (PAN), a nitrogen‐rich polymer, is reported, giving rise to PAN‐S nanoparticles with cyclic π‐conjugated backbone and electronic conductivity. PAN‐S can be coated on ultra‐robust melamine (ML) foam by simple dipping and drying. In agreement with hard/soft acid/base theory, N‐ and S‐containing soft Lewis bases have strong binding to Hg2+, Pb2+, Cu2+, and Cd2+, with extraordinary capture efficiency and performance stability. Furthermore, the used filters, when collected and electrochemically biased in a recycling bath, can release the HMIs into the bath and electrodeposit on the counter‐electrode as metallic Hg0, Pb0, Cu0, and Cd0, and the PAN‐S@ML filter can then be reused at least 6 times as new. The electronically conductive PAN‐S@ML filter can be fabricated cheaply and holds promise for scale‐up applications.

show abstract

Ag‐Nanocatalysts Based on Porous Organic Polymers in Chemical Fixation of CO₂ for the N‐Methylation and N‐Formylation of Amines

Chakrabortty,

Kumar,

Chowdhury

et al. 2024

ChemCatChem

View full text Add to dashboard Cite

Chemical fixation of CO2 for the synthesis of valuable chemicals is very demanding in the context of green and sustainable chemistry. Herein, we report highly efficient silver‐loaded porous organic polymer catalysts for the exclusive N‐formylation and N‐methylation of amines under ambient reaction conditions using CO2 as a green C1 source. By adjusting the solvent and temperature of the reaction, the successful production of formamides and methylamines could be accomplished with high levels of selectivity and efficiency. POP‐based materials Ag@TTP‐1 and Ag@PAN‐T are utilized as low‐cost catalysts for both the N‐methylation and N‐formylation of primary and secondary amines and the product yields up to 98 % could be achieved. Ag@TTP‐1 demonstrated superior catalytic efficiency compared to Ag@PAN‐T in the N‐methylation and N‐formylation reactions. This result suggests that the grafting of Ag nanoparticles onto POP surface with a high surface area plays a crucial role in these CO2 fixation reactions. The above‐mentioned catalysts (Ag@TTP‐1 and Ag@PAN‐T) are characterized through powder XRD, FT IR spectroscopy, FE‐SEM, TEM, thermogravimetric techniques, N2 sorption and XPS analysis. Ag‐nanocatalysts demonstrated heterogeneous nature and high recycling efficiency for several cycles in this CO2 fixation reaction.

show abstract

Novel polyethyleneimine functionalized chitosan–lignin composite sponge with nanowall-network structures for fast and efficient removal of Hg(ii) ions from aqueous solution

Abstract: An environmental-friendly polyethyleneimine functionalized chitosan–lignin composite sponge with interconnected nanowall-network structures is feasibly fabricated for rapidly and selectively removing Hg(ii) ions from aqueous solution.

Cited by 70 publications

References 46 publications

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Reusable Polyacrylonitrile‐Sulfur Extractor of Heavy Metal Ions from Wastewater

Ag‐Nanocatalysts Based on Porous Organic Polymers in Chemical Fixation of CO₂ for the N‐Methylation and N‐Formylation of Amines

Contact Info

Product

Resources

About

Novel polyethyleneimine functionalized chitosan–lignin composite sponge with nanowall-network structures for fast and efficient removal of Hg(ii) ions from aqueous solution

Abstract: An environmental-friendly polyethyleneimine functionalized chitosan–lignin composite sponge with interconnected nanowall-network structures is feasibly fabricated for rapidly and selectively removing Hg(ii) ions from aqueous solution.

Cited by 70 publications

References 46 publications

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Reusable Polyacrylonitrile‐Sulfur Extractor of Heavy Metal Ions from Wastewater

Ag‐Nanocatalysts Based on Porous Organic Polymers in Chemical Fixation of CO2 for the N‐Methylation and N‐Formylation of Amines

Contact Info

Product

Resources

About

Ag‐Nanocatalysts Based on Porous Organic Polymers in Chemical Fixation of CO₂ for the N‐Methylation and N‐Formylation of Amines