Graphene oxide-modified organic Gaomiaozi bentonite for Yb(III) adsorption from aqueous solutions

Sun, Zhao; Chen, Yong-Gui; Mu, Xiang; Ye, Weimin

doi:10.1016/j.matchemphys.2021.125176

Cited by 18 publications

(5 citation statements)

References 52 publications

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“…Exploratory endeavors are underway globally to investigate alternative approaches to mitigate these challenges. One prominent approach is rooted in solid-phase adsorption, in which REE ions in solution are captured by a solid adsorbent; this approach not only generates reduced waste but also bears the advantage that the adsorbate, including silica, − graphene, iron oxide nanoparticles, zeolites, , metal–organic frameworks, , hydroxyapatite composites, , etc., can be used iteratively, unlike the liquid-phase separation that requires single-use but costly chelating agents.…”

Section: Introductionmentioning

confidence: 99%

Capturing Rare-Earth Elements by Synthetic Aluminosilicate MCM-22: Mechanistic Understanding of Yb(III) Capture

Chatterjee,

Han,

Kobayashi

et al. 2023

ACS Appl. Mater. Interfaces

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Section: Introductionmentioning

confidence: 99%

Capturing Rare-Earth Elements by Synthetic Aluminosilicate MCM-22: Mechanistic Understanding of Yb(III) Capture

Chatterjee,

Han,

Kobayashi

et al. 2023

ACS Appl. Mater. Interfaces

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“…The FTIR amino-GO-Bent, as shown in Figure 5, at 3281 cm À1 and 2938-3022 cm À1 belong to C H stretching vibration, and the broadband at 1491 cm À1 was the peak of C C stretching vibration. 37 In addition, amino-GO-Bent has new peaks at 3281, 3022, and 2938 cm À1 corresponding to the symmetric stretching vibration peak of NH 3 on amino-GO and an enhanced stretching vibration at 1491 cm À1 that corresponds to the peak of the tertiary hydroxyl group (1400 cm À1 ) on GO. 38 These results suggest that amino-GO graft successfully to Bent.…”

Section: Ftir Of Amino-go-bentmentioning

confidence: 99%

Synthesis of dual‐functionalized mixed matrix membrane with amino‐GO‐Bent/PVDF for efficient separation of CO₂/CH₄ and CO₂/N₂

Dong

Huang

et al. 2022

J of Applied Polymer Sci

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Mixed matrix membranes (MMMs), which combine the characteristics of inorganic nanofillers and organic matrices, have received wide attention because of their good permeability and selective performance for separating CO2 from industrial waste gases. In this work, the amino‐GO‐loaded bentonite (amino GO‐Bent) was prepared by loading NH2 on the GO surface with a large number of functional sites. Firstly, by introducing NH2 on the surface of GO and then interacting with bentonite (Bent) organically modified by silane coupling agents through amide bonding. Mixed matrix membranes (MMMs) with an area of 623.7 cm2 and homogeneous texture were prepared using amino‐GO‐Bent as inorganic filler to improve the membrane selectivity for CO2/N2 and CO2/CH4 separation. The results show that the introduction of amino GO‐Bent in MMMs can greatly improve the CO2 permeability and obtain high CO2 permeation performance: 2.67945 × 10−7 cm3 (STP)·cm/s/cm2/cmHg, and the selectivity of CO2/N2 and CO2/CH4 can reach 307.28 and 325.97, respectively. The two selective values were 14 and 18 times higher than those of pure PVDF membranes, and the performance of MMMs far exceeded the Robeson upper limit in 2008, respectively.

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“…First, cations such as K, Cu, Mg, Na, etc. are mainly found in montmorillonite inter-layers 23 . These cations and crystal structures are unstable, which leads to ion-exchange reactions 24 .…”

Section: Introductionmentioning

confidence: 99%

Characterization of the remediation of chromium ion contamination with bentonite by terahertz time-domain spectroscopy

Cheng

Huang

Yang

et al. 2022

Sci Rep

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Heavy metal pollution of agricultural and urban soils limits economic progress in the rapidly developing society. Terahertz technology is applied to detect heavy metal pollutants under existence of multiple pathways of their dissemination. In this study, terahertz time-domain spectroscopy (THz-TDS) is employed as an advanced probing technique in combination with traditional detecting methods to measure the adsorption ability of trivalent chromium ions on bentonite. The concentration of chromium ions and the weight of bentonite are known to influence on the adsorption capacity of the latter. It is tested here by both qualitative and quantitative measurements of two mentioned parameters. The adsorption process of chromium ions by bentonite is monitored using THz-TDS. The adsorptions signal from samples at 0.5 THz gradually increases with the increase of bentonite weight or chromium ion concentration. It would appear to indicate that terahertz could be used for quantitative detection of metal ions. Secondly, the ratios of results obtained by inductively coupled plasma mass spectrometry (ICP-MS) and the THz-TDS ones are stabilized at 0.105 ± 0.014 as the bentonite weight or chromium ion concentration increase. Such finding confirms that terahertz technology can be used for the quantitative detection of metal ions. Using the relationship between the ICP-MS test results and the THz-TDS ones, the amplitude value of bentonite is obtained to be 13.925 at the concentration of chromium ions of 0.05 mol/L, the mass of bentonite sample involved in adsorption of 1.5 g, and the detection frequency in THz-TDS measurements of 0.5 THz. The adsorption coefficient of bentonite is calculated to be 1.44%. Increase of the chromium ion concentration to 0.2 mol/L, and the mass of bentonite involved in adsorption to 3 g leads to the increase of the amplitude corresponding to adsorbed chromium ions to about 19.463, and the adsorption coefficient to about 2.1%. Obtained results demonstrate that terahertz technology is promising to meet the ever-increasing requirements in mineral analyses for rapid detection of chemical contaminants and measurement of the adsorption efficiencies of materials.

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Graphene oxide-modified organic Gaomiaozi bentonite for Yb(III) adsorption from aqueous solutions

Cited by 18 publications

References 52 publications

Capturing Rare-Earth Elements by Synthetic Aluminosilicate MCM-22: Mechanistic Understanding of Yb(III) Capture

Capturing Rare-Earth Elements by Synthetic Aluminosilicate MCM-22: Mechanistic Understanding of Yb(III) Capture

Synthesis of dual‐functionalized mixed matrix membrane with amino‐GO‐Bent/PVDF for efficient separation of CO₂/CH₄ and CO₂/N₂

Characterization of the remediation of chromium ion contamination with bentonite by terahertz time-domain spectroscopy

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Graphene oxide-modified organic Gaomiaozi bentonite for Yb(III) adsorption from aqueous solutions

Cited by 18 publications

References 52 publications

Capturing Rare-Earth Elements by Synthetic Aluminosilicate MCM-22: Mechanistic Understanding of Yb(III) Capture

Capturing Rare-Earth Elements by Synthetic Aluminosilicate MCM-22: Mechanistic Understanding of Yb(III) Capture

Synthesis of dual‐functionalized mixed matrix membrane with amino‐GO‐Bent/PVDF for efficient separation of CO2/CH4 and CO2/N2

Characterization of the remediation of chromium ion contamination with bentonite by terahertz time-domain spectroscopy

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Synthesis of dual‐functionalized mixed matrix membrane with amino‐GO‐Bent/PVDF for efficient separation of CO₂/CH₄ and CO₂/N₂