Surface-tuned hierarchical ɤ-Fe2O3–N-rGO nanohydrogel for efficient catalytic removal and electrochemical sensing of toxic nitro compounds

Ramu, A.G.; Salla, Sunitha; Gopi, Sivalingam; Silambarasan, P.; Yang, Daejeong; Song, Mee; Ali, Hayssam M.; Salem, Mohamed Z. M.; Choi, Dai Hyuk

doi:10.1016/j.chemosphere.2020.128853

Cited by 29 publications

(5 citation statements)

References 42 publications

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“…In addition, Fe NPs (Fe 2+ to Fe 3+ ) exhibited well-defined redox peaks at −0.448 V and −0.008 V, which mainly enhanced the detection of 4-NP. 37 In Fig. S3a, with the successive addition of 4-NP, the current of the reduction peak increased obviously, further confirming that P 2h -Fe/Fe 3 O 4 @C-700/GCE has a good electrocatalytic activity for the 4-NP reduction.…”

Section: -Hydroxyaminophenol (4-hap)supporting

confidence: 59%

A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe₃O₄@C for the Detection of 4-Nitrophenol

Ren

Wang

Leng

et al. 2022

J. Electrochem. Soc.

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4-Nitrophenol (4-NP) is a typical organic pollutant, thus it is urgent to detect it in environmental samples. This study rationally designed a novel electrode material of P-doping Fe/Fe3O4@C (P-Fe/Fe3O4@C) prepared with MIL-88 as precursor. P2h-Fe/Fe3O4@C-700 was synthesized by calcining MIL-88 at 700℃, followed by annealing process with NaH2PO2 for 2 h. The P2h-Fe/Fe3O4@C-700 modified glassy carbon electrode (P2h-Fe/Fe3O4@C-700/GCE) showed a high electrocatalytic activity toward 4-NP reduction due to its active metal center, fine-tuned electronic structure by P-doping, as well as good electrical conductivity. It exhibited excellent sensing behaviors in 4-NP detection with rather high sensitivities of 1415.43 μA·mM-1·cm-2 and 424.63 μA·mM-1·cm-2 in the 4-NP concentration of 5 to 100 μM and 100 to 1200 μM, respectively, with a low detection limit of 0.462 μM. The P2h-Fe/Fe3O4@C-700/GCE still had good selectivity for 4-NP detection in the presence of common interferences. In addition, it was found that the current response towards 4-NP at P2h-Fe/Fe3O4@C-700/GCE retained more than 97% of its initial value after one week, indicating a good long-term stability. Furthermore, the P2h-Fe/Fe3O4@C-700/GCE exhibited a good reproducibility. The constructed P2h-Fe/Fe3O4@C-700/GCE achieved practical uses for the sensing of 4-NP in tap water with satisfactory recoveries.

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Section: -Hydroxyaminophenol (4-hap)supporting

confidence: 59%

A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe₃O₄@C for the Detection of 4-Nitrophenol

Ren

Wang

Leng

et al. 2022

J. Electrochem. Soc.

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“…The findings indicate that the TC removal is affected when the free radicals in the system are reduced [26]. Secondly, the TC degradation is also influenced by the charge of TC and the surface charge of CuFe2O4 [27,28]. The point of zero charge (pHzpc) of CuFe2O4 was 5.95 (Figure 8a).…”

Section: The Effect Of Initial Phmentioning

confidence: 98%

Catalytic Degradation of Tetracycline Hydrochloride by Coupled UV−Peroxydisulfate System: Efficiency, Stability and Mechanism

Shi

Zhang

et al. 2023

Processes

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Magnetic CuFe2O4 powder obtained by sol−gel method and coupled photocatalysis was used to activate peroxydisulfate for tetracycline (TC) removal. A scanning electron microscope, X−ray diffraction Raman spectroscopy and FT−TR were used to characterize the catalysts. The degradation efficiency and stability of TC were highest under neutral conditions. The TC degradation rate reached 91.1% within 90 min. The removal rate of total organic carbon reaches 39.6% under optimal conditions. The unique electron transfer property of CuFe2O4 was utilized to achieve the synergistic effect of photocatalysis and persulfate oxidation. The main oxidizing substances involved in the decomposition were sulfate radicals and hydroxyl radicals, and the removal rate of over 84% could be maintained after five cycles of experiments.

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“…但是, 这些吸附剂吸附率低, 回收价值不高, 在此不做展开介绍. 而随着对吸附剂的更高要求, 研究者通过对原有吸附剂进行改性处理和研发新的吸附剂, 得到了吸附性能更高的吸附材料, 如多孔有机聚合物 [9,40] 和纳米复合材料 [41,42] . 但其高成本和低再生特性限制了其在商业规模上的应用 [43] .…”

Section: 阴离子污染物指水中以阴离子形式存在的离子态污染物质此类污染物是废水中一个较为重要的污染unclassified

Research progress in the treatment of anionic pollutants in wastewater

Xiu-xia¹,

Shang²,

Zhang³

et al. 2021

Sci. Sin.-Chim

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Most of the anionic pollutants in wastewater are toxic and harmful to the natural environment and human health. Anionic contamination and its treatment have emerged as an escalating challenge globally. It is imperative to develop technology and methods to achieve the effective removal of anionic pollutants. Extraordinary efforts have been made to overcome the challenges of wastewater treatment in recent years. In this paper, the treatment of anionic pollutants in wastewater are reviewed, respectively from the physical treatment, chemical treatment, physical and chemical treatment, and biological treatment. Various techniques such as physical procedures like adsorption and membrane filtration, chemical methods like reduction method and coprecipitation process, and several biological techniques have been recognized for the treatment of wastewater. Meanwhile, the effects of different methods on the treatment of anionic pollutants in wastewater were summarized, and the advantages and disadvantages of each treatment method were compared and analyzed. This review communicates insights into recent research developments in different treatment techniques and their applications to eradicate various water contaminants. Finally, the future research direction of anionic pollutants treatment technology in wastewater is prospected. This will provide methods and data support for the treatment and practical application of anionic pollutants in wastewater.

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Surface-tuned hierarchical ɤ-Fe2O3–N-rGO nanohydrogel for efficient catalytic removal and electrochemical sensing of toxic nitro compounds

Cited by 29 publications

References 42 publications

A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe₃O₄@C for the Detection of 4-Nitrophenol

A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe₃O₄@C for the Detection of 4-Nitrophenol

Catalytic Degradation of Tetracycline Hydrochloride by Coupled UV−Peroxydisulfate System: Efficiency, Stability and Mechanism

Research progress in the treatment of anionic pollutants in wastewater

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Surface-tuned hierarchical ɤ-Fe2O3–N-rGO nanohydrogel for efficient catalytic removal and electrochemical sensing of toxic nitro compounds

Cited by 29 publications

References 42 publications

A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe3O4@C for the Detection of 4-Nitrophenol

A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe3O4@C for the Detection of 4-Nitrophenol

Catalytic Degradation of Tetracycline Hydrochloride by Coupled UV−Peroxydisulfate System: Efficiency, Stability and Mechanism

Research progress in the treatment of anionic pollutants in wastewater

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Product

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A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe₃O₄@C for the Detection of 4-Nitrophenol

A Highly Sensitive Electrochemical Sensing Platform Based on P-doped Fe/Fe₃O₄@C for the Detection of 4-Nitrophenol