Flexible nitrogen-doped carbon nanofiber-reinforced hierarchical hollow iron oxide nanorods as a binder-free electrode for efficient capacitive deionization

Gao, Ming; Li, Jiaxin; Wang, Yuan; Liang, Wencui; Yang, Zhiqian; Chen, Yi; Deng, Wenyang; Wang, Zhen; Ao, Tianqi; Chen, Wenqing

doi:10.1016/j.desal.2022.116360

Cited by 44 publications

(8 citation statements)

References 56 publications

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“…The O 1s spectrum of HPIONPS (Figure b1) showed a peak at 530.9 eV, indicating oxygen vacancies within the iron lattice (Fe–O) acting as charge trap sites, and a peak at 532.4 eV attributed to adsorbed water on the NPs’ surface· − Moreover, all coated samples exhibited a characteristic O 1s peak at 531.4 eV (Figure b2–b4), associated with Fe–O–Fe units . Interestingly, after coating with PEG10 (Figure b3), the uncoated HPIONPs’ lattice oxygen peak shifted from 530.9 to 529.9 eV, suggesting an increase in valence electron density during the coating interaction .…”

Section: Resultsmentioning

confidence: 99%

Enhancing Physicochemical Properties and Biocompatibility of Hollow Porous Iron Oxide Nanoparticles through Polymer-Based Surface Modifications

Malabanan,

Alcantara,

Jantaratana

et al. 2023

ACS Appl. Bio Mater.

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In this study, we synthesized hollow porous iron oxide nanoparticles (HPIONPs) with surface modifications using polymers, specifically chitosan (Chi), polyethylene glycol (PEG), and alginate (Alg), to improve colloidal stability and biocompatibility. For colloidal stability, Alg-coated HPIONPs maintained size stability up to 24 h, with only an 18% increase, while Chi, PEG, and uncoated HPIONPs showed larger size increases ranging from 64 to 140%. The biocompatibility of polymer-coated HPIONPs was evaluated by assessing their cell viability, genotoxicity, and hemocompatibility. Across tested concentrations from 6.25 to 100 μg/mL, both uncoated and polymer-coated HPIONPs showed minimal cytotoxicity against three normal cell lines: RAW264.7, 3T3-L1, and MCF10A, with cell viability exceeding 80% at the highest concentration. Notably, polymer-coated HPIONPs exhibited nongenotoxicity based on the micronucleus assay and showed hemocompatibility, with only 2–3% hemolysis in mouse blood, in contrast to uncoated HPIONPs which exhibited 4–5%. Furthermore, we evaluated the cytotoxicity of HPIONPs on MDA-MB-231 breast cancer cells after a 2 h exposure to a stationary magnetic field, and the results showed the highest cell death of 38 and 29% when treated with uncoated and polymer-coated HPIONPs at 100 μg/mL, respectively. This phenomenon is attributed to iron catalyzing the Fenton and Haber-Weiss reactions, leading to reactive oxygen species (ROS)-dependent cell death (r ≥ 0.98). In conclusion, the hydrothermal synthesis and subsequent surface modification of HPIONPs with polymers showed improved colloidal stability, nongenotoxicity, and hemocompatibility compared to uncoated HPIONPs while maintaining closely similar levels of cytotoxicity against both normal and cancer cells. This research has paved the way for further exploration of polymer coatings to enhance the overall performance and safety profile of magnetic nanoparticles in delivering anticancer drugs.

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Section: Resultsmentioning

confidence: 99%

Enhancing Physicochemical Properties and Biocompatibility of Hollow Porous Iron Oxide Nanoparticles through Polymer-Based Surface Modifications

Malabanan,

Alcantara,

Jantaratana

et al. 2023

ACS Appl. Bio Mater.

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“…Some recently reported TMOs containing other Faradaic electrodes with high desalination performance can be listed as follows: (i) MnO 2 /graphene‐aerogel//BiOCl [189] and 3D MnO 2 @graphene/CNT//Ag@graphene/CNT [190] DEDI cell architectures showed desalination performance with maximum SAC/ASAR of 69.18 mg g −1 /1.14 mg g −1 min −1 and 62.4 mg g −1 /3.12 mg g −1 min −1 , respectively. (ii) Fe 2 O 3 @N‐CNFs coupled with Cl − capturing NiCo LDH@N‐CNFs showed SAC/ASAR as high as 114.97 mg g −1 /~5.75 mg g −1 min −1 in 500 mg L −1 NaCl solution at 1.2 V [191] . (iii) Cu@Cu 2 O/C‐1100//AC HCDI device showed an excellent SAC of 86.3 mg g −1 @ 0.02 A g −1 [192] .…”

Section: Compositing/heterostructuring Of the Mxene For CDI Applicati...mentioning

confidence: 99%

MXene‐Based Capacitive Deionization–Strong Competitor Among Faradaic Electrode Systems: Current Status and Future Perspectives

Dubey

2023

ChemistrySelect

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Capacitive deionization (CDI) of brackish water is emerging as a sustainable and energy efficient desalination processes to mitigate the excessive demand of freshwater. Despite that the porous carbon is prime choice in the conventional CDI; its electrostatic interaction‐based limited salt adsorption capacity (SAC, up to 25 mg g−1) has driven the research interest to explore various Faradaic electrodes for attaining maximum SAC (>100 mg g−1) in supplementation with the other desalination metrics. MXene is one of the newly discovered intercalation‐type pseudocapacitive nanostructures, which promised an excellent desalination performance due to its intriguing properties, such as tuneable interlayer spacing, high electrical conductivity, hydrophilicity, and structural integrity. Furthermore, its compositing/heterostructuring with other electro‐active components significantly improves the desalination activity. This article provides a systematic overview of the MXene‐based electrodes utilized in CDI along with the one‐to‐one comparison with other Faradaic systems. Materials design, structure, cell architecture, desalination metrics‐based performance evaluation, and underlying driving forces behind the salty ions removal activity are the main emphasis of discussion to realize MXene‐based efficient CDI desalination. Lastly, the key issues and perspectives of MXene‐based electrode systems are put forward towards new developments and real time implication.

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“…A comprehensive review highlights the development of advanced materials with specific Environmental Science: Water Research & Technology Critical review morphologies and structural complexities, aiming to enhance fluoride elimination from water. 100 Li et al 101 investigated fluoride electro-sorption using AC electrodes for CDI. A graph of the electro-sorption cell is shown in Fig.…”

Section: Of Fluoride Ion (F − )mentioning

confidence: 99%

“…To meet such challenge, more and more attention has been paid to modifications of electrodes with pseudocapacitive components. 158 This can provide additional charge storage mechanisms over that of the EDL using faradaic reactions, producing a higher specific capacitance. Pseudocapacitive materials such as transition metal oxides (RuO 2 , MnO 2 ) and conductive polymers (polyaniline, polypyrrole) can consequently improve the charge storage capacity of AC electrodes.…”

Section: Challenges and Potential Of Acementioning

confidence: 99%

Enhancing capacitive deionization for water desalination: the role of activated carbon in contaminant removal

Wang,

Shan,

Zhang

et al. 2024

Environ. Sci.: Water Res. Technol.

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Flexible nitrogen-doped carbon nanofiber-reinforced hierarchical hollow iron oxide nanorods as a binder-free electrode for efficient capacitive deionization

Cited by 44 publications

References 56 publications

Enhancing Physicochemical Properties and Biocompatibility of Hollow Porous Iron Oxide Nanoparticles through Polymer-Based Surface Modifications

Enhancing Physicochemical Properties and Biocompatibility of Hollow Porous Iron Oxide Nanoparticles through Polymer-Based Surface Modifications

MXene‐Based Capacitive Deionization–Strong Competitor Among Faradaic Electrode Systems: Current Status and Future Perspectives

Enhancing capacitive deionization for water desalination: the role of activated carbon in contaminant removal

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