Introduction of benzotriazole into graphene oxide for highly selective coadsorption of An and Ln: Facile synthesis and theoretical study

Ding, Jie; Tang, Shande; Xiao, Chen; Ding, Mu; Kang, Jinyang; Wu, Rulei; Fu, Zhihai; Jin, Yongdong; Li, Laicai; Xu, Feng; Wang, Ruibing; Xia, Chuanqin

doi:10.1016/j.cej.2018.03.114

Cited by 34 publications

(7 citation statements)

References 71 publications

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“…Meanwhile, Py-TFIm-25 COF exhibited a distribution coefficient of 1.21 × 10 4 mL g −1 for Th(IV), a distribution coefficient ranging from 0.28 to 204.35 mL g −1 for lanthanide ions, 30.80 mL g −1 for U(VI), 3.18 mL g −1 for Sr(II), and 0.33 mL g −1 for Cs(I). The separation factors SF Th(IV)/M of the two materials for Th(IV) compared to other competing ions were all in the range of 10 2 to 10 5 , which overwhelmed the majority of previously reported adsorbents 45 , 54 , 55 . These findings indicated that the affinity of Py-TFImI-25 COF and Py-TFIm-25 COF towards Th(IV) was considerably higher than that towards other competing cations.…”

Section: Resultsmentioning

confidence: 68%

Efficient and selective capture of thorium ions by a covalent organic framework

Liu,

Gao,

Jin

et al. 2023

Nat Commun

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The selective separation of thorium from rare earth elements and uranium is a critical part of the development and application of thorium nuclear energy in the future. To better understand the role of different N sites on the selective capture of Th(IV), we design an ionic COF named Py-TFImI-25 COF and its deionization analog named Py-TFIm-25 COF, both of which exhibit record-high separation factors ranging from 102 to 105. Py-TFIm-25 COF exhibits a significantly higher Th(IV) uptake capacity and adsorption rate than Py-TFImI-25 COF, which also outperforms the majority of previously reported adsorbents. The selective capture of Py-TFImI-25 COF and Py-TFIm-25 COF on thorium is via Th-N coordination interaction. The prioritization of Th(IV) binding at different N sites and the mechanism of selective coordination are then investigated. This work provides an in-depth insight into the relationship between structure and performance, which can provide positive feedback on the design of novel adsorbents for this field.

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Section: Resultsmentioning

confidence: 68%

Efficient and selective capture of thorium ions by a covalent organic framework

Liu,

Gao,

Jin

et al. 2023

Nat Commun

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“…First, the adsorption sites of IEF-11 are composed of multiple O atoms, and such oxygen-rich sites have favorable affinity for actinide metal ions . Second, the 5f and 6d orbitals of the actinide ions help to bond with the O atoms . Notably, since Th 4+ has a higher valence and higher charge density than other metal ions, it can be regarded as a strong Lewis acid; and the O-rich adsorption sites can be regared as a strong Lewis base.…”

Section: Results and Discussionmentioning

confidence: 99%

“…55 Second, the 5f and 6d orbitals of the actinide ions help to bond with the O atoms. 56 Notably, since Th 4+ has a higher valence and higher charge density than other metal ions, it can be regarded as a strong Lewis acid; and the O-rich adsorption sites can be regared as a strong Lewis base. On the basis, a strong Lewis acid-based interaction occurs between IEF-11 and Th(IV) As shown in Figure S9a, the adsorption capacities of IEF-11 for Th(IV) and U(VI) ions can remain >97.0% of that in Th(IV) or U(VI) single-component solutions, whatever in bicomponent and five-component solutions.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Efficient Capture of Th(IV) and U(VI) by Radiation-Resistant Oxygen-Rich Ion Traps Based on a Metal–Organic Framework

Chen

Gan

Xiao

et al. 2023

ACS Appl. Mater. Interfaces

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Herein, based on a well-stabilized Ti-MOF (IEF-11), an oxygen-rich ion trap with synergy interaction of active atoms was proposed for the removal of Th(IV) and U(VI) from aqueous solutions. Due to the high coordination number of Ti and compact framework structure, IEF-11 has excellent resistance toward β-ray irradiation, even under 1000 kGy irradiation dosage. Meanwhile, owing to the special chelating effect of the oxygen-rich ion traps, the maximum adsorption amounts of IEF-11 for Th(IV) (pH = 3.0) and U(VI) (pH = 5.0) ions can reach 305.9 and 240.7 mg g–1, and the separation coefficients exceed 200 for Th(IV)/Nd(III), Th(IV)/Sm(III), and Th(IV)/Eu(III) and 100 for U(VI)/Eu(III), U(VI)/La(III), and U(VI)/Sr(II). Moreover, IEF-11 shows fast adsorption kinetics with an equilibrium time of ∼100 min. The adsorption amount almost remains even after four adsorption–desorption cycles. Finally, experimental and theoretical calculations indicate that Th(IV) and U(VI) ions are anchored in the ion trap in the form of chemical bonds. Meanwhile, the circular pore trap (class I trap) than the long pore trap (class II trap) is considered to be the better adsorption site. We expect that our work will provide a new insight for constructing effective adsorbents for radioactive nuclides.

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“…rGO self‐assembles into a single sheet‐like morphology, demonstrating the efficient reduction that takes place in GO. The morphological configuration of the BTA‐rGO surface, when compared to the rGO surface, shows that its sheet‐like structure and a distinct light‐spot that could be caused to nonconducting BTA [46] remain the same. According to the findings, the BTA was successfully functionalized and evenly dispersed on the rGO.…”

Section: Resultsmentioning

confidence: 99%

“…The structure of benzene rings in BTA has a peak at 1613 cm À 1 and the peak stretching vibration causes the concedable intensity peak at 1113 and 1348 cm À 1 owing to the CÀ N. [45] The new broad peaks obtained at 1580 and 1188 cm À 1 are assigned to N=N and NÀ N vibrations on the surfaces of BTA-rGO, respectively. [46] The peaks at 791 cm À 1 and 990 cm À 1 are owing to CÀ H in the plane and out of the benzene ring of benzotriazole and the presence of benzotriazole with rGO, respectively. [47][48][49][50] Moreover, bands between 3600 and 3300 cm À 1 are associated with OÀ H stretching.…”

Section: Ftir Spectroscopy Analysismentioning

confidence: 99%

Electrochemical Sensing of Arsenic Ions Using a Covalently Functionalized Benzotriazole‐Reduced Graphene Oxide‐Modified Screen‐Printed Carbon Electrode

Gunasekaran

Rayappan

Rajendran³

et al. 2022

ChemistrySelect

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Herein, Tecoma stans (TS) flower extract was used as an efficient green reducing agent for graphene oxide (GO) to produce reduced graphene oxide (rGO) for the first time. The organic heterocyclic benzotriazole (BTA) was incorporated onto the rGO surface through a nucleophilic substitution reaction to produce covalently bonded BTA-rGO. The prepared materials were analyzed by UV-visible spectroscopy, powder Xray diffraction measurements (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and Scanning Electron Microscopy (SEM). A screen-printed carbon electrode (SPCE) was modified with BTA-rGO. The fabricated electrode was electrochemically analyzed by using K 3 [Fe (CN) 6 ] as a redox probe. To evaluate the sensing ability of BTA-rGO/SPCE electrode towards arsenic ions using differential pulse voltammetry (DPV) and amperometry techniques. The BTA functional was play the major role in significant improving the conductivity and sensitivity of the designed electrode. The BTA-rGO/SPCE modified electrode demonstrates voltammetric determination of As 3 + ions with a limit of detection, high sensitivity, and linear range values of 2.89 nM, 1.8 μA nM À 1 , and 2-40 nM, respectively. Furthermore, all of these impressive results indicate that BTA-rGO can be used as an electrodematerial with capability for electrochemical arsenic sensors. The fabricated sensors showed repeatability and reproducibility in this study.

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Introduction of benzotriazole into graphene oxide for highly selective coadsorption of An and Ln: Facile synthesis and theoretical study

Cited by 34 publications

References 71 publications

Efficient and selective capture of thorium ions by a covalent organic framework

Efficient and selective capture of thorium ions by a covalent organic framework

Efficient Capture of Th(IV) and U(VI) by Radiation-Resistant Oxygen-Rich Ion Traps Based on a Metal–Organic Framework

Electrochemical Sensing of Arsenic Ions Using a Covalently Functionalized Benzotriazole‐Reduced Graphene Oxide‐Modified Screen‐Printed Carbon Electrode

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