Efficient removal of uranium (VI) with a phytic acid-doped polypyrrole/ carbon felt electrode using double potential step technique

Huang, Jie; Liu, Zhongfan; Huang, Dejuan; Jin, Tianxiang; Qian, Yong

doi:10.1016/j.jhazmat.2022.128775

Cited by 70 publications

(21 citation statements)

References 46 publications

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“…This proves that the charge transfer from S atoms to Co atoms leads to the increase of electron cloud density of S atoms, the existence of Co 3+ /Co 2+ and the specific chemical interaction between Co atoms and S atoms. 56,57 Inthe narrow XPS spectra of Mn 2p and Cu 2p shown in Fig. 3e and f, the peaks of M 2p 3/2 (M = Mn, Cu) significantly shift to higher binding energies, which indicates that the oxidation states of M (M = Mn, Cu) have changed.…”

Section: Resultsmentioning

confidence: 97%

“…To further study the charge storage kinetics of the as-fabricated electrodes, the peak currents ( i ) and scan rates (mV s −1 ) conform to the exponential relationship as shown in the following eqn (15): 56 i = av b In eqn (15), the i and v are in turn the peak currents (A) and scan rates (mV s −1 ), while a and b are constants. The value of b is the slope of the fitting to log( i ) and log( v ).…”

Section: Resultsmentioning

confidence: 99%

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3D nanoflower-like and core–shell structured MCo₂O₄@MCo₂S₄@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

et al. 2023

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

3D nanoflower-like and core–shell structured MCo₂O₄@MCo₂S₄@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

et al. 2023

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“…39,40 The functionalized magnetic composites composed of Fe 3 O 4 microspheres wrapped with the conducting polymer can not only improve the dispersion in the matrix but also provide more active sites to interact with target molecules. 41,42 Conducting polymers act as promising adsorbents due to the abundant functional groups and tunable molecular structures, 43 mainly including polyaniline (PANI), 44−46 polypyrrole (PPy), 47,48 polythiophene (PTh), 49,50 polyacetylene (PA), 51 and so on. 52 PPy is used in the field of adsorption because of its low cost, good stability, ease of synthesis, and good corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Conducting polymers act as promising adsorbents due to the abundant functional groups and tunable molecular structures, mainly including polyaniline (PANI), − polypyrrole (PPy), , polythiophene (PTh), , polyacetylene (PA), and so on . PPy is used in the field of adsorption because of its low cost, good stability, ease of synthesis, and good corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Core–Shell Fe₃O₄@polypyrrole@4-vinylpyridine Composites for the Removal of Multiple Dyes

Ren

Wang

Ding

et al. 2022

ACS Appl. Polym. Mater.

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Although adsorption materials demonstrate a great potential in adsorbing dye molecules, fabricating an adsorbent that can adsorb multiple dyes at the same times has met with limited success. Here, magnetic core−shell Fe 3 O 4 @PPy@4-VP composites are successfully fabricated for the treatment of a variety of dyes including methylene blue (MB), malachite green (MG), rhodamine B (RhB), and alizarin red (AR). The effects of concentration of dyes, temperature, and time on the adsorption performances are studied. The adsorption properties are further elucidated by adsorption kinetics, isotherm, and adsorption thermodynamic models in detail. The results show that the fitted adsorption kinetic curves for the four dyes (MB, MG, RhB, and AR) fit better to the proposed pseudo-second-order model. The adsorption process for MB, MG, RhB, and AR is in accordance with the Langmuir model, and the adsorption process for AR is in accordance with the Freundlich isotherm model. The Boyd film diffusion model and intraparticle diffusion model are used to explore the diffusion process of adsorption. Meanwhile, the discussion of adsorption thermodynamics indicates that the adsorption process of four dyes shows a spontaneous endothermic behavior. In addition, the removal amounts q after five adsorption−desorption cycles are 98.98, 97.37, 97.87, and 39.49% for MB, MG, RhB, and AR, respectively, and the losses are less than 1%. The prepared adsorbent is not only capable of adsorbing various dyes simultaneously, but it, with a saturation magnetization value of 33.84 emu g −1 , can be rapidly separated from solution, thus offering a wide range of applications in the field of separation and adsorption.

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“…[20,21] However, posttreatment is required after electrical extraction as photocatalytic reduction. [22,23] Therefore, it is an urgent need to develop a simple and effective uranium extraction method.Recently, an electrochemical uranium extraction technique has been proposed to achieve high efficiency uranium extrac tion performance through pH changes around the electrode caused by HER. For example, Wang at al.…”

mentioning

confidence: 99%

Bi‐Functional Co/Al Modified 1T‐MoS₂/rGO Catalyst for Enhanced Uranium Extraction and Hydrogen Evolution Reaction in Seawater

Jian

Kang

et al. 2023

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of uranium. [5] Therefore, research on the rapid and selective recovery of uranium element from seawater is of great impor tance for the sustainable development of the nuclear industry. [6][7][8] Currently, the common methods used to extract uranium from seawater include the adsorption, membrane separation, photocatalytic reduction, and electro chemical reduction. [9][10][11][12][13] Adsorption and membrane separation methods, as simple physical methods, have been studied a lot, but the efficiency of uranium extraction is low and more influenced by various complex factors in seawater. [14][15][16] Photo catalytic reduction is a lowcost, non polluting method but it is less efficient and requires posttreatment to separate uraniumcontaining precipitates from the electrode material after electrical extrac tion. [17][18][19] Electrochemical reduction has a high efficiency in uranium extraction. [20,21] However, posttreatment is required after electrical extraction as photocatalytic reduction. [22,23] Therefore, it is an urgent need to develop a simple and effective uranium extraction method.Recently, an electrochemical uranium extraction technique has been proposed to achieve high efficiency uranium extrac tion performance through pH changes around the electrode caused by HER. For example, Wang at al. have proved that a functionalized reduced graphene oxide foam is used as a HER catalyst material to achieve high uranium extraction perfor mance. [24] However, its HER performance is still low, leading to an insufficient uranium extraction performance, and post treatment is required after electrical extraction. Therefore, it is critical to design and develop a highperformance HER catalyst for rapid extraction and recovery of uranium from seawater. It is worth noting that MoS 2 has been widely used as HER catalyst due to its moderate hydrogen adsorption free energy. However, the practical application of MoS 2 in electrocatalysis is hindered by its weak conductivity. [25][26][27] In comparison, reduced gra phene oxide (rhas high charge mobility and large surface area, being effectively used in functional composites as an ideal sup port component. Combining MoS 2 with rGO substrates could enhance the charge transfer between MoS 2 . [28,29] At the same time, modification of various metals has also been used to improve the electrocatalytic activity in MoS 2 . [30][31][32] Compared to Uranium is a key element in the preparation of nuclear fuel. An electrochemical uranium extraction technique is proposed to achieve high efficiency uranium extraction performance through HER catalyst. However, it is still a challenge to design and develop a high-performance hydrogen evolution reaction (HER) catalyst for rapid extraction and recovery of uranium from seawater. Herein, a bi-functional Co, Al modified 1T-MoS 2 /reduced graphene oxide (CA-1T-MoS 2 /rGO) catalyst, showing a good HER performance with a HER overpotential of 466 mV at 10 mA cm −2 in simulated seawater, is first developed. Benefiting from the high HER performance of CA-1T-...

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Efficient removal of uranium (VI) with a phytic acid-doped polypyrrole/ carbon felt electrode using double potential step technique

Cited by 70 publications

References 46 publications

3D nanoflower-like and core–shell structured MCo₂O₄@MCo₂S₄@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

3D nanoflower-like and core–shell structured MCo₂O₄@MCo₂S₄@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

Magnetic Core–Shell Fe₃O₄@polypyrrole@4-vinylpyridine Composites for the Removal of Multiple Dyes

Bi‐Functional Co/Al Modified 1T‐MoS₂/rGO Catalyst for Enhanced Uranium Extraction and Hydrogen Evolution Reaction in Seawater

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Efficient removal of uranium (VI) with a phytic acid-doped polypyrrole/ carbon felt electrode using double potential step technique

Cited by 70 publications

References 46 publications

3D nanoflower-like and core–shell structured MCo2O4@MCo2S4@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

3D nanoflower-like and core–shell structured MCo2O4@MCo2S4@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

Magnetic Core–Shell Fe3O4@polypyrrole@4-vinylpyridine Composites for the Removal of Multiple Dyes

Bi‐Functional Co/Al Modified 1T‐MoS2/rGO Catalyst for Enhanced Uranium Extraction and Hydrogen Evolution Reaction in Seawater

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3D nanoflower-like and core–shell structured MCo₂O₄@MCo₂S₄@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

3D nanoflower-like and core–shell structured MCo₂O₄@MCo₂S₄@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

Magnetic Core–Shell Fe₃O₄@polypyrrole@4-vinylpyridine Composites for the Removal of Multiple Dyes

Bi‐Functional Co/Al Modified 1T‐MoS₂/rGO Catalyst for Enhanced Uranium Extraction and Hydrogen Evolution Reaction in Seawater