Fabrication of efficient alginate composite beads embedded with N-doped carbon dots and their application for enhanced rare earth elements adsorption from aqueous solutions

Guo, Zhiwei; Li, Quan; Li, Zhiyue; Liu, Cong; Liu, Xuerui; Liu, Yuanyuan; Dong, Genlai; Lan, Tao; Wei, Yun

doi:10.1016/j.jcis.2019.12.030

Cited by 59 publications

(19 citation statements)

References 53 publications

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“…To further confirm the variation in the forms of Ca that existed and the concentration in the Ca-SAT membrane after ion permeation, XPS measurements were conducted. Consistent with the typical XPS spectrum of Ca-alginate gel in previous reports 49 , 50 , the Ca 2 p region could be fitted by two peaks at binding energies of 350.6 and 347.0 eV, which suggested the cross-linking interaction between Ca 2+ and alginate molecules (Supplementary Fig. 15 ).…”

Section: Resultssupporting

confidence: 89%

Ion sieving by a two-dimensional Ti3C2Tx alginate lamellar membrane with stable interlayer spacing

et al. 2020

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Two-dimensional membranes attract extensive interest due to the anomalous transport phenomena; however, the ion separation performance is below the theoretical prediction. The stabilization of d-spacing is a key step for enhancing ion selectivity. Here, we demonstrate a strategy for stabilizing the Ti 3 C 2 T x laminar architecture by alginate hydrogel pillars. After pillared by Ca-alginate, the nanochannel diameters are effectively fixed at 7.4 ± 0.2 Å, and the membrane presents a permeation cutoff and an outstanding sieving property towards valent cations. When applied for acid recovery, the outstanding H + /Fe 2+ selectivity makes the membrane a promising substitution for traditional ion-exchange membranes. Moreover, the ultrathin Mn-alginate pillared membrane with identical d-spacing exhibits 100% Na 2 SO 4 rejection with high water permeance, which is superior to the state-of-the-art nanofiltration membranes. Building on these findings, we demonstrate an efficient method to tune the ion selectivity and introduce a new perspective for energy-and environment-related applications.

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Section: Resultssupporting

confidence: 89%

Ion sieving by a two-dimensional Ti3C2Tx alginate lamellar membrane with stable interlayer spacing

et al. 2020

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“…Specifically, the bands at 3332 cm −1 correspond to the O-H stretching vibration. Those at 1567 and 1097 cm −1 could be attributed to the C = O stretching vibration and C-O vibration band [29], respectively, both of which belong to the carboxyl functionalities. The bands at 1422 cm −1 could be ascribed to C = C stretching and are probably from the graphitic core of CDs.…”

Section: Chemical Compositionsmentioning

confidence: 99%

Synthesis Mechanisms, Structural Models, and Photothermal Therapy Applications of Top-Down Carbon Dots from Carbon Powder, Graphite, Graphene, and Carbon Nanotubes

Shi

Han

et al. 2022

IJMS

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In this study, top-down syntheses of carbon dots (CDs) from four different carbon precursors, namely, carbon nano powders, graphite, graphene, and carbon nanotubes, were carried out. Systematic study demonstrated that the optical properties and surface functionalities of the CDs were quite similar and mainly influenced by the synthesis method, while the sizes, morphologies, chemical compositions, and core structures of the CDs were heavily influenced by the carbon precursors. On the basis of these studies, the formation processes and structural models of these four top-down CDs were proposed. The cell cytotoxicity and photothermal conversion efficiency of these CDs were also carefully evaluated, demonstrating their potential applications in photothermal therapy.

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“…Graphene quantum dots (GQDs), which consist of nano-sized graphene monolayers that exhibit quantum confinement, can be produced in a variety of methods, of which the most popular are pyrolysis [69,70] and hydrothermal [57][58][59][60][61]63,64] routes. Other methods that could be carried out at lower temperatures have attracted attention, especially using microwaves [67,68,106], but also ultrasound-assisted approaches [72]. Recently, an electrochemical green approach was developed that employed water and ethanol as solvents [55].…”

Section: Carbon Quantum Dots (Cqds)mentioning

confidence: 99%

Green Approaches to Carbon Nanostructure-Based Biomaterials

et al. 2021

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The family of carbon nanostructures comprises several members, such as fullerenes, nano-onions, nanodots, nanodiamonds, nanohorns, nanotubes, and graphene-based materials. Their unique electronic properties have attracted great interest for their highly innovative potential in nanomedicine. However, their hydrophobic nature often requires organic solvents for their dispersibility and processing. In this review, we describe the green approaches that have been developed to produce and functionalize carbon nanomaterials for biomedical applications, with a special focus on the very latest reports.

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Fabrication of efficient alginate composite beads embedded with N-doped carbon dots and their application for enhanced rare earth elements adsorption from aqueous solutions

Cited by 59 publications

References 53 publications

Ion sieving by a two-dimensional Ti3C2Tx alginate lamellar membrane with stable interlayer spacing

Ion sieving by a two-dimensional Ti3C2Tx alginate lamellar membrane with stable interlayer spacing

Synthesis Mechanisms, Structural Models, and Photothermal Therapy Applications of Top-Down Carbon Dots from Carbon Powder, Graphite, Graphene, and Carbon Nanotubes

Green Approaches to Carbon Nanostructure-Based Biomaterials

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