Acrylic Acid-Functionalized Metal–Organic Frameworks for Sc(III) Selective Adsorption

Lou, Zhenning; Xiao, Xin; Huang, Mengnan; Wang, Yuejiao; Xing, Zhiqiang; Xiong, Ying

doi:10.1021/acsami.9b00476

Cited by 63 publications

(32 citation statements)

References 47 publications

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“…4b, Table 2). All the materials had higher selectivity towards Er 3+ than to Gd 3+ and Nd 3+ when compared to recently studied adsorbents (Table 3), such as MOFs [21,[67][68][69], zirconium (IV) organophosphonates [33,35], commercial resins [70], PEI cellulose nanocrystals [71], and competitive with functionalized mesoporous silica KIT-6 [72]. Moreover, MIL-101-T50 shows practically no adsorption of Nd 3+ or Gd 3+ .…”

Section: Selectivity Testsmentioning

confidence: 81%

Selective recovery and separation of rare earth elements by organophosphorus modified MIL-101(Cr)

Kavun

Veen

Repo

2021

Microporous and Mesoporous Materials

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Development of state-of-the-art selective adsorbent materials for recovery of rare earth elements (REEs) is essential for their sustainable usage. In this study, a metal-organic framework (MOF), MIL-101(Cr), was synthesized and post-synthetically modified with optimised loading of the organophosphorus compounds tributyl phosphate (TBP), bis(2-ethylhexyl) hydrogen phosphate (D2EHPA, HDEHP) and bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex®-272). The materials were characterized and their adsorption efficiency towards Nd 3+ , Gd 3+ and Er 3+ from aqueous solutions was investigated. The MOF derivatives demonstrated an increase in adsorption capacity for Er 3+ at optimal pH 5.5 in the order of MIL-101-T50 (37.2 mg g − 1 ) < MIL-101-C50 (48.9 mg g − 1 ) < MIL-101-H50 (57.5 mg g − 1 ). The exceptional selectivity of the materials for Er 3+ against transition metal ions was over 90%, and up to 95% in the mixtures with rare earth ions. MIL-101-C50 and MIL-101-H50 demonstrated better chemical stability than MIL-101-T50 over 3 adsorption− desorption cycles. The adsorption mechanism was described by the formation of coordinative complexes between the functional groups of modifiers and Er 3+ ions.

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Section: Selectivity Testsmentioning

confidence: 81%

Selective recovery and separation of rare earth elements by organophosphorus modified MIL-101(Cr)

Kavun

Veen

Repo

2021

Microporous and Mesoporous Materials

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“…It was reported that the acidic carboxylic groups of MIL-101 functionalized by acrylic acid participate in adsorption of Sc 3+ ions. The conclusions were made on the basis of the strong decrease in the intensity of the CO band at 1712 cm –1 and the OH band at 3430 cm –1 (associated with the COOH moieties) after adsorption of Sc 3+ …”

Section: Vibrational Spectra Of Mofsmentioning

confidence: 99%

“…The conclusions were made on the basis of the strong decrease in the intensity of the CO band at 1712 cm −1 and the OH band at 3430 cm −1 (associated with the COOH moieties) after adsorption of Sc 3+ . 224 Consider now the materials from the CPO-27 series, also called MOF-74. They attract a great interest as typical representatives of MOFs possessing open metal sites.…”

Section: Vibrational Spectra Of Mofsmentioning

confidence: 99%

Power of Infrared and Raman Spectroscopies to Characterize Metal-Organic Frameworks and Investigate Their Interaction with Guest Molecules

et al. 2020

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The variety of functionalities and porous structures inherent to metal-organic frameworks (MOFs) together with the facile tunability of their properties makes these materials suitable for a wide range of existing and emerging applications. Many of these applications are based on processes involving interaction of MOFs with guest molecules. To optimize a certain process or successfully design a new one, a thorough knowledge is required about the physicochemical characteristics of materials and the mechanisms of their interaction with guest molecules. To obtain such important information, various complementary analytical techniques are applied, among which vibrational spectroscopy (IR and Raman) plays an important role and is indispensable in many cases. In this review, we critically examine the reported applications of IR and Raman spectroscopies as powerful tools for initial characterization of MOF materials and for studying processes of their interaction with various gases. Both the advantages and the limitations of the technique are considered, and the cases where IR or Raman spectroscopy is preferable are highlighted. Peculiarities of MOFs interaction with specific gases and some inconsistent band assignments are also emphasized. Summarizing the broad analytical possibilities of the IR and Raman spectroscopies, we conclude that it can be applied in combinations with other techniques to explicitly establish the structure, properties, and reactivity of MOFs.

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“…As depicted in Fig. 1(c), the spectra of O 1s were determined as C-O (532.6 eV) [32] and O-H (531.7 eV) [32]. According to Fig.…”

Section: Characterization Of the Modified Alkaline Ligninmentioning

confidence: 99%

Performance of a modified alkaline lignin towards copper adsorption under different conditions

Zheng

Wang

Dai³

et al. 2021

Environmental Engineering Research

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Polyethyleneimine and carbon disulfide were employed to modify alkaline lignin (AL) in order to introduce -NH, -NH2 and -CSS- groups. Its adsorption performance towards Cu(II) was evaluated based on the residual concentration (Cr) against the discharge permissible concentration for Cu(II) (2.0 mg/L) established by the World Health Organization. The evaluation was operated under different conditions such as adjusting the solution pH, Cu(II) coexisting with K(I), Na(I), Ca(II) or Mg(II), changing the contact time (t) and initial concentration of Cu(II) (C0), as well as regeneration. When t and C0 equaled to 180 min and 50 mg/L, Cr was less than 2.0 mg/L at pH of 5.03 to 5.65. Under the situation of Cu (II) coexisting with 50 mg/L of K(I), Na(I), Ca(II) or Mg(II), Cr was as low as 1.96, 1.53, 1.97 or 1.55 mg/L (t = 180 min, C0 = 50 mg/L), respectively. Even the modified AL was regenerated and reused four times, Cr was closed to 2 mg/L for each time (t = 180 min, C0 = 51 mg/L). By comparing with other lignin-based materials according to the adsorption equilibrium time, the maximum adsorption capacity, and Cr, the modified AL exhibited higher application potential in copper-loaded water treatment.

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Acrylic Acid-Functionalized Metal–Organic Frameworks for Sc(III) Selective Adsorption

Abstract: The increasing demand for rare-earth elements (REEs) due to their extensive high-tech applications has encouraged the development of new sustainable approaches for REE recovery and separation. In this work, a series of acrylic acid-functionalized metal−organic framework materials

Cited by 63 publications

References 47 publications

Selective recovery and separation of rare earth elements by organophosphorus modified MIL-101(Cr)

Selective recovery and separation of rare earth elements by organophosphorus modified MIL-101(Cr)

Power of Infrared and Raman Spectroscopies to Characterize Metal-Organic Frameworks and Investigate Their Interaction with Guest Molecules

Performance of a modified alkaline lignin towards copper adsorption under different conditions

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