Porous phytic acid-doped sodium alginate aerogels as the electrode material for the electrosorption of uranium from acidic solution

Luo, Qingyun; Jin, Tianxiang; Huang, Jie; Liu, Zhongfan; Huang, Dejuan

doi:10.1007/s10967-022-08328-8

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…The bands at 1630 and 1510 cm –1 are the characteristic absorption peaks of the lignin benzene ring skeleton, and 1034 cm –1 is the stretching peak of the −SO 3 group. , The FTIR spectra of S3L3 and S3L3PA0.5 aerogels displayed the characteristic peaks of SA and LS, indicating that the aerogels contain these two substances. After the addition of PA, the absorption peak at 1030 cm –1 (P–O–C asymmetric stretching) overlapped with the band of lignin, and a new peak also appeared at 1730 cm –1 (phosphate hydrogen radical). , Overall, there were no significant changes in the FTIR spectra of the aerogels, except that some peaks were shifted to higher wavenumbers and some to lower wavenumbers due to intramolecular/intermolecular hydrogen bonding. As a result, we supposed that the three components were primarily physical cross-links that worked together to form the aerogels’ skeleton structure, and the aerogels were cured in an oven to further improve the cross-linking strengths.…”

Section: Results and Discussionmentioning

confidence: 88%

“…After the addition of PA, the absorption peak at 1030 cm −1 (P−O−C asymmetric stretching) overlapped with the band of lignin, and a new peak also appeared at 1730 cm −1 (phosphate hydrogen radical). 31,32 Overall, there were no significant changes in the FTIR spectra of the aerogels, except that some peaks were shifted to higher wavenumbers and some to lower wavenumbers due to intramolecular/intermolecular hydrogen bonding. As a result, we supposed that the three components were primarily physical cross-links that worked together to form the aerogels' skeleton structure, and the aerogels were cured in an oven to further improve the crosslinking strengths.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

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Full Bio-Based Aerogel Incorporating Lignin for Excellent Flame Retardancy, Mechanical Resistance, and Thermal Insulation

Cen

Chen

Yang

et al. 2023

ACS Sustainable Chem. Eng.

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Aerogels have drawn a lot of interest as prospective insulation materials in the construction industry due to their low thermal conductivity. However, the combination of excellent mechanical properties and flame retardancy is a fundamental issue with the majority of bio-based aerogels. By utilizing the ability of the alginate solution to gel in mildly acidic environments, sodium alginate (SA)/ sodium lignosulfonate (LS)/phytic acid (PA) aerogels were fabricated in a quick and facile method. To solve the issue of inorganic additives being incompatible with the bio-based substrate, we introduced lignin to it as a structural reinforcer and charforming agent, significantly improving the mechanical strengths of the aerogels, which has increased their compressive modulus by nearly 30 times. The inclusion of lignin dramatically boosted the ability of aerogels to suppress smoke while simultaneously reducing its fire index and then providing outstanding fire resistance. A superhydrophobic flame-retardant aerogel with a water contact angle of 150°was then obtained by chemical vapor deposition of methyltrichlorosilane (MTCS), further broadening its application potential. This work offers a fresh idea for the high-value utilization of lignin, and the obtained aerogels have enormous application potential in the fields of construction and transportation.

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Section: Results and Discussionmentioning

confidence: 88%

Section: ■ Results and Discussionmentioning

confidence: 95%

Full Bio-Based Aerogel Incorporating Lignin for Excellent Flame Retardancy, Mechanical Resistance, and Thermal Insulation

Cen

Chen

Yang

et al. 2023

ACS Sustainable Chem. Eng.

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“…In this study, 0.1 M HCl was selected to elute the MS@PDA@PA-U after adsorption of U(VI) according to the reference. [41] The formulas for the cycle utilization rate (Eq. 3) was shown below: R % ð Þ¼ q n q 1 � 100 % (3)…”

Section: Recyclability and Salt-endurance Of Ms@pda@pamentioning

confidence: 99%

“…[34][35][36] One PA molecule contains six negatively charged phosphate groups, exhibits quite strong complexing ability to a wide range of metal cations, a good choice for extraction of metal ions. PAdoped materials have been successfully applied in several areas such as adsorption of metal cations, [37][38][39][40][41] dyes, [42] and electrochemical detection/activity. [43] Polydopamine (PDA) [44,45] has the merits of mild and environmentally benign synthesis and broad availability for modification on a wide range of substrates, and has been widely applied in a variety of occasions including energy storage, catalysis, biosensors, drug delivery, and environmental remediation.…”

Section: Introductionmentioning

confidence: 99%

Green and Simple Synthesis of a Nonflammable and Broad‐Spectrum Adsorbent for Uranyl and Other Metal Ions

Zhang,

Li,

Zhao

et al. 2023

ChemistrySelect

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Adsorption is an effective technology widely used in the removal of radioactive and other heavy metal ions, the adsorbent plays critical role and development of novel adsorbents is being in urgent demand. In this work, phytic acid (PA)‐modified melamine sponge (MS) adsorbent MS@PDA@PA is prepared conveniently in green solvent water. A wide spectrum of metal ions including radioactive uranyl and transition heavy metal ions can be effectively adsorbed by the MS@PDA@PA due to non‐selectivity of phosphoric acid groups in PA. Different factors including pH of aqueous solution, contact time, and initial concentration of ions on the effect of adsorption of the resultant materials are investigated in detail, and the maximum adsorption capacities for U(VI), Pb(II), Cu(II), Cr(III) are 166.7, 168.5, 114.3, and 101.0 mg g−1 respectively at 298 K. It is notable that the MS@PDA@PA is nonflammable due to employment of MS as frame material, and the thermal stability is even improved after incorporation of PA, greatly reduce the risk of the adsorbent in the processes of storage and usage. The green yet simple synthesis and fire resistance of MS@PDA@PA make it a competitive material for practical treatment of wastewater consisting of toxic metal ions.

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Phosphate-functionalized magnetic calcium alginate for the engineering remediation of uranium-contaminated water and soil

Wang,

Zhang,

2023

Chemical Engineering Journal

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Porous phytic acid-doped sodium alginate aerogels as the electrode material for the electrosorption of uranium from acidic solution

Cited by 11 publications

References 32 publications

Full Bio-Based Aerogel Incorporating Lignin for Excellent Flame Retardancy, Mechanical Resistance, and Thermal Insulation

Full Bio-Based Aerogel Incorporating Lignin for Excellent Flame Retardancy, Mechanical Resistance, and Thermal Insulation

Green and Simple Synthesis of a Nonflammable and Broad‐Spectrum Adsorbent for Uranyl and Other Metal Ions

Phosphate-functionalized magnetic calcium alginate for the engineering remediation of uranium-contaminated water and soil

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