Removal of F− from water by magnetic floriform magnesium zirconium hydrotalcite-like material doped with Fe2O3 and ZrO2

Wang, Ruicong; Wang, Danqi; Peng, Wengcai; Zhang, Jingli; Liu, Jichang; Wang, Yi; Wang, Xinyuan

doi:10.1016/j.desal.2022.116142

Cited by 11 publications

(5 citation statements)

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“…The Fe 2 p spectrum of the Fe 2 O 3 /CC material was fitted into four peaks at binding energies of ∼711.9, 716.7, 725.6, and 732.4 eV corresponding to Fe 2 p 3/2 , “sat,” Fe 2 p 1/2 and “sat” band, respectively, and Fe was identified as Fe 3+ in the catalyst (Figure 3A). [24] By comparison, there was a negative shift in Fe 2 p 1/2 and Fe 2 p 3/2 in the Fe 2 O 3 @NiO‐ x /CC materials with the introduction of NiO, and the binding energy decreased from 725.6 to 725.0 eV for Fe 2 p 1/2 and from 711.9 to 711.6 eV for Fe 2 p 3/2 , demonstrating the strong interaction between NiO and Fe 2 O 3 [25] . This may be due to the electron transfer from O heteroatoms in Ni−O to Fe 2 O 3 , resulting in more oxygen vacancies in Fe 2 O 3 @NiO‐ x /CC materials and a decrease in the relative content of M−O in these materials (Figure 3B–D).…”

Section: Resultsmentioning

confidence: 97%

“…[24] By comparison, there was a negative shift in Fe 2p 1/2 and Fe 2p 3/2 in the Fe 2 O 3 @NiO-x/CC materials with the introduction of NiO, and the binding energy decreased from 725.6 to 725.0 eV for Fe 2p 1/2 and from 711.9 to 711.6 eV for Fe 2p 3/2 , demonstrating the strong interaction between NiO and Fe 2 O 3 . [25] This may be due to the electron transfer from O heteroatoms in NiÀ O to Fe 2 O 3 , resulting in more oxygen vacancies in Fe 2 O 3 @NiO-x/CC materials and a decrease in the relative content of MÀ O in these materials (Figure 3B-D). Similarly, the Ni 2p spectrum of the NiO/CC material was fitted ChemistrySelect into four peaks at binding energies of ∼ 856.4, 861.6, 874.1, and 879.5 eV, corresponding to Ni 2p 3/2 , "sat," Ni 2p 1/2 , and "sat" band, and Ni was identified as Ni 2 + in the catalyst (Figure 3B).…”

Section: The Chemical Composition and Oxidation States Of The Materialsmentioning

confidence: 99%

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Non‐noble metal Fe₂O₃@NiO as efficient bifunctional catalysts for water splitting

et al. 2023

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The development of non‐noble metal catalysts is crucial for hydrogen production. In this study, electrochemically reconfigurable Fe2O3@NiO‐x composite catalysts were synthesized within tens of seconds using a simple microwave deposition method. Interestingly, Fe2O3@NiO‐5 exhibited a high‐speed and deep surface reconstruction capability, greatly enhancing the hydrogen evolution reaction (HER) activity. DFT calculations also confirmed that the reconstruction process optimized the adsorption energy of H2O and H intermediate to promote HER kinetics. The optimized Fe2O3@NiO‐5 electrode only afforded an overpotential of 295 mV at 10 mA cm−2 and it steadily functioned for 25 h for HER in 1 M KOH. In addition, benefiting from the combination of Fe2O3 and NiO layer during the synthesis process, Fe2O3 and NiO converted into FeOOH and NiOOH, respectively, resulted in the excellent oxygen evolution reaction (OER) activity of Fe2O3@NiO‐5. The as‐prepared Fe2O3@NiO‐5 only required an overpotential of 186 mV at 10 mA cm−2 and exhibited excellent stability for up to 144 h. As a bifunctional catalyst, the Fe2O3@NiO‐5 electrode can deliver a current density of 20 mA cm−2 at a low voltage of 1.78 V with high durability for water splitting. This work can provide a new perspective for constructing advanced non‐noble metal electrode.

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Section: Resultsmentioning

confidence: 97%

Section: The Chemical Composition and Oxidation States Of The Materialsmentioning

confidence: 99%

Non‐noble metal Fe₂O₃@NiO as efficient bifunctional catalysts for water splitting

et al. 2023

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“…The one-step urea hydrothermal method had been used to synthesise magnesium zirconium hydrotalcite-like material doped with Fe 2 O 3 , and ZrO 2 , which were used for fluoride removal from water with an adsorption capacity as high as 113.38 mg/g. The metal oxide nanoparticles and the hexagonal laminae of the hydrotalcite were uniformly stacked, producing a large specific area of the adsorbent [96]. Recently, nitrogen-doped carboxylated porous carbon materials were employed to remove heavy metals from water-namely, lead, mercury, and chromium.…”

Section: Recent Advancements In Doped Adsorbentsmentioning

confidence: 99%

Advancements in Doping Strategies for Enhanced Photocatalysts and Adsorbents in Environmental Remediation

Sen,

Bhattacharya,

Mukherjee

et al. 2023

Technologies

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Environmental pollution poses a pressing global challenge, demanding innovative solutions for effective pollutant removal.. Photocatalysts, particularly titanium dioxide (TiO2), are renowned for their catalytic prowess; however, they often require ultraviolet light for activation. Researchers had turned to doping with metals and non-metals to extend their utility into the visible spectrum. While this approach shows promise, it also presents challenges such as material stability and dopant leaching. Co-doping, involving both metals and non-metals, has emerged as a viable strategy to mitigate these limitations. Inthe fieldof adsorbents, carbon-based materials doped with nitrogen are gaining attention for their improved adsorption capabilities and CO2/N2 selectivity. Nitrogen doping enhances surface area and fosters interactions between acidic CO2 molecules and basic nitrogen functionalities. The optimal combination of an ultramicroporous surface area and specific nitrogen functional groups is key to achievehigh CO2 uptake values and selectivity. The integration of photocatalysis and adsorption processes in doped materials has shown synergistic pollutant removal efficiency. Various synthesis methods, including sol–gel, co-precipitation, and hydrothermal approaches had been employed to create hybrid units of doped photocatalysts and adsorbents. While progress has been made in enhancing the performance of doped materials at the laboratory scale, challenges persist in transitioning these technologies to large-scale industrial applications. Rigorous studies are needed to investigate the impact of doping on material structure and stability, optimize process parameters, and assess performance in real-world industrial reactors. These advancements are promising foraddressing environmental pollution challenges, promoting sustainability, and paving the way for a cleaner and healthier future. This manuscript provides a comprehensive overview of recent developments in doping strategies for photocatalysts and adsorbents, offering insights into the potential of these materials to revolutionize environmental remediation technologies.

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“…The magnetic material mixed with hydrotalcite can improve its reusability. For example, Wang [26] doped Fe 2 O 3 magnetic material to synthesize magnetic flower-like hydrotalcite-like materials. By testing its reusability, it was found that after 5 cycles of adsorption, the fluoride removal performance of the adsorbent was still maintained at 80.93 % of the fresh adsorbent.…”

Section: Characteristics Of Hydrotalcite Itselfmentioning

confidence: 99%

Application Potential of Layered Double Hydroxides for The Treatment of Persistent Organic Pollutants

Feng,

Liu,

Zhi

2023

AJST

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Layered double hydroxides (LDHs) is a widely used emerging material. With its adjustable composition, other ions or materials can be incorporated on the surface or in the layer to synthesize modified materials with stronger ability to capture target pollutants. Persistent organic pollutants (POPs) exist in air, water and soil for a long time, which not only affect the ecosystem and ecological balance, but also endanger human health. Therefore, it is of great significance to study the application potential of LDHs in the treatment of POPs. The removal mechanism of persistent organic pollutants by LDHs includes adsorption and activated persulfate oxidation. The factors affecting the removal of POPs by LDHs include the characteristics of LDHs itself (including the inherent characteristics of composition, structure, morphology, etc.), coexisting substrates, temperature, etc.

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Removal of F− from water by magnetic floriform magnesium zirconium hydrotalcite-like material doped with Fe2O3 and ZrO2

Cited by 11 publications

References 73 publications

Non‐noble metal Fe₂O₃@NiO as efficient bifunctional catalysts for water splitting

Non‐noble metal Fe₂O₃@NiO as efficient bifunctional catalysts for water splitting

Advancements in Doping Strategies for Enhanced Photocatalysts and Adsorbents in Environmental Remediation

Application Potential of Layered Double Hydroxides for The Treatment of Persistent Organic Pollutants

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Removal of F− from water by magnetic floriform magnesium zirconium hydrotalcite-like material doped with Fe2O3 and ZrO2

Cited by 11 publications

References 73 publications

Non‐noble metal Fe2O3@NiO as efficient bifunctional catalysts for water splitting

Non‐noble metal Fe2O3@NiO as efficient bifunctional catalysts for water splitting

Advancements in Doping Strategies for Enhanced Photocatalysts and Adsorbents in Environmental Remediation

Application Potential of Layered Double Hydroxides for The Treatment of Persistent Organic Pollutants

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Non‐noble metal Fe₂O₃@NiO as efficient bifunctional catalysts for water splitting

Non‐noble metal Fe₂O₃@NiO as efficient bifunctional catalysts for water splitting