Co(III)-Salen immobilized cellulose nanocrystals for efficient catalytic CO2 fixation into cyclic carbonates under mild conditions

Hu, Lingling; Xie, Qiujian; Tang, Juntao; Pan, Chunyue; Yu, Guipeng; Tam, Kam Chiu

doi:10.1016/j.carbpol.2020.117558

Cited by 24 publications

(19 citation statements)

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“…Hu et al immobilized reactive Co (III) salen species onto sCNCs to produce heterogeneous catalysts for the synthesis of cyclic carbonates from propylene oxide and CO 2 [ 109 ]. These catalysts achieved a near quantitative yield in 24 h at low CO 2 pressure of 0.1 MPa with demonstrated reusability in four reaction cycles.…”

Section: Applications Of Ccncsmentioning

confidence: 99%

Preparation and Surface Functionalization of Carboxylated Cellulose Nanocrystals

Lam

Hemraz

2021

Nanomaterials

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In recent years, cellulose nanocrystals (CNCs) have emerged as a leading biomass-based nanomaterial owing to their unique functional properties and sustainable resourcing. Sulfated cellulose nanocrystals (sCNCs), produced by sulfuric acid-assisted hydrolysis of cellulose, is currently the predominant form of this class of nanomaterial; its utilization leads the way in terms of CNC commercialization activities and industrial applications. The functional properties, including high crystallinity, colloidal stability, and uniform nanoscale dimensions, can also be attained through carboxylated cellulose nanocrystals (cCNCs). Herein, we review recent progress in methods and feedstock materials for producing cCNCs, describe their functional properties, and discuss the initial successes in their applications. Comparisons are made to sCNCs to highlight some of the inherent advantages that cCNCs may possess in similar applications.

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Section: Applications Of Ccncsmentioning

confidence: 99%

Preparation and Surface Functionalization of Carboxylated Cellulose Nanocrystals

Lam

Hemraz

2021

Nanomaterials

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“…Based on the results reported by various scientists, it can be concluded that newly synthesized or commercial extractants/ion carriers can be used to recover noble metal ions (Pd, Ag, Pt, and Au). For example, calix [4]arene derivatives can be effective extractants in the recovery of palladium, silver, and platinum ions from aqueous solutions whereas calix [4]pyrrole derivatives can be used as extractants for palladium ions and as carriers for silver ions. N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]glycine (D2EHAG) can also be applied in solvent extraction for the recovery of palladium (98%) and gold (69%) ions, and in membrane extraction for the removal of gold ions (96%).…”

Section: Discussionmentioning

confidence: 99%

“…The Cu(II) ions formed the most stable complexes with salen molecules in chloroform and the least stable in methanol. Initially, complexation properties of salen were used primarily in catalysis [4]. However, over time, the uses of salen have been extended, and one of them is separation.…”

Section: Introductionmentioning

confidence: 99%

Efficient Recovery of Noble Metal Ions (Pd2+, Ag+, Pt2+, and Au3+) from Aqueous Solutions Using N,N'-Bis(salicylidene)ethylenediamine (Salen) as an Extractant (Classic Solvent Extraction) and Carrier (Polymer Membranes)

et al. 2021

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This paper presents the results of the first application of N,N'-bis(salicylidene)ethylenediamine (salen) as an extractant in classical liquid–liquid extraction and as a carrier in membrane processes designed for the recovery of noble metal ions (Pd2+, Ag+, Pt2+, and Au3+) from aqueous solutions. In the case of the utilization of membranes, both sorption and desorption were investigated. Salen has not been used so far in the sorption processes of precious metal ions. Recovery experiments were performed on single-component solutions (containing only one type of metal ions) and polymetallic solutions (containing ions of all four metals). The stability constants of the obtained complexes were determined spectrophotometrically. In contrast, electrospray ionization high-resolution mass spectrometry (ESI-HRMS) was applied to examine the elemental composition and charge of the generated complexes of chosen noble metal ions and salen molecules. The results show the great potential of N,N'-bis(salicylidene)ethylenediamine as both an extractant and a carrier. In the case of single-component solutions, the extraction percentage was over 99% for all noble metal ions (molar ratio M:L of 1:1), and in the case of a polymetallic solution, it was the lowest, but over 94% for platinum ions and the highest value (over 99%) for gold ions. The percentages of sorption (%Rs) of metal ions from single-component solutions using polymer membranes containing N,N'-bis(salicylidene)ethylenediamine as a carrier were highest after 24 h of the process (93.23% for silver(I) ions, 74.99% for gold(III) ions, 69.11% and 66.13% for palladium(II) and platinum(II) ions, respectively), similar to the values obtained for the membrane process conducted in multi-metal solutions (92.96%, 84.26%, 80.94%, and 48.36% for Pd(II), Au(III), Ag(I), and Pt(II) ions, respectively). The percentage of desorption (%Rdes) was very high for single-component solutions (the highest, i.e., 99%, for palladium solution and the lowest, i.e., 88%, for silver solution), while for polymetallic solutions, these values were slightly lower (for Pt(II), it was the lowest at 63.25%).

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“…19 Heterogeneous catalytic systems are generally preferred over homogeneous ones due to their simple removal aer reaction and greater recovery and reuse. 20 On the other hand, among the various supports used for heterogeneous catalysts, biopolymers have a special position compared to their counterparts due to their larger surface area, ease of preparation, cheapness, and green nature. 21,22 In recent years, the growth of science and technology has shied to the use of renewable and sustainable resources and processes.…”

Section: Introductionmentioning

confidence: 99%

Chemical CO₂ fixation using a green biocatalytic system based on Ugi conjugated cobalt phthalocyanine on cellulose

Nazeri

Ramezani

Javanbakht

et al. 2022

Sustainable Energy Fuels

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Co(III)-Salen immobilized cellulose nanocrystals for efficient catalytic CO2 fixation into cyclic carbonates under mild conditions

Cited by 24 publications

References 50 publications

Preparation and Surface Functionalization of Carboxylated Cellulose Nanocrystals

Preparation and Surface Functionalization of Carboxylated Cellulose Nanocrystals

Efficient Recovery of Noble Metal Ions (Pd2+, Ag+, Pt2+, and Au3+) from Aqueous Solutions Using N,N'-Bis(salicylidene)ethylenediamine (Salen) as an Extractant (Classic Solvent Extraction) and Carrier (Polymer Membranes)

Chemical CO₂ fixation using a green biocatalytic system based on Ugi conjugated cobalt phthalocyanine on cellulose

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Co(III)-Salen immobilized cellulose nanocrystals for efficient catalytic CO2 fixation into cyclic carbonates under mild conditions

Cited by 24 publications

References 50 publications

Preparation and Surface Functionalization of Carboxylated Cellulose Nanocrystals

Preparation and Surface Functionalization of Carboxylated Cellulose Nanocrystals

Efficient Recovery of Noble Metal Ions (Pd2+, Ag+, Pt2+, and Au3+) from Aqueous Solutions Using N,N'-Bis(salicylidene)ethylenediamine (Salen) as an Extractant (Classic Solvent Extraction) and Carrier (Polymer Membranes)

Chemical CO2 fixation using a green biocatalytic system based on Ugi conjugated cobalt phthalocyanine on cellulose

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Chemical CO₂ fixation using a green biocatalytic system based on Ugi conjugated cobalt phthalocyanine on cellulose