Fe3O4/Co3O4 core-shell nanocomposites modified structure and properties of heavy metal oxide diamagnetic glasses

Chen, Qiuling; Su, Kai; Zhang, Meng; Ma, Qingming

doi:10.1016/j.jnoncrysol.2019.01.011

Cited by 14 publications

(3 citation statements)

References 52 publications

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“…Herein, we reported an iron phthalocyanine (FePc)-induced switchable photocurrent-polarity platform for highly selective detection of As(V) based on the good dispersibility of magnetic Co 3 O 4 –Fe 3 O 4 cubes and low toxicity and high photoelectric activity of silver indium sulfide (AgInS 2 ) (Scheme ). First, the magnetic Co 3 O 4 –Fe 3 O 4 cubes were obtained by the calcination of CoFe Prussian blue analogue (PBA), and then, the Co 3 O 4 –Fe 3 O 4 cubes were functionalized with oligonucleotide (S1) based on the formation of surface complexes between metal ions and phosphate backbones of single-stranded DNA. − In the presence of As(V), S1 could be released based on the stronger affinity between As(V) and Co 3 O 4 –Fe 3 O 4 cubes.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Xiao

Zhang

et al. 2022

Anal. Chem.

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Water pollution presents a significant environmental concern on earth. Herein, due to the serious environmental harmfulness of arsenate [As(V)], an iron phthalocyanine (FePc)induced switchable photocurrent-polarity platform was developed for highly selective assay of As(V). First, magnetic Co 3 O 4 −Fe 3 O 4 cubes were obtained by calcination of the CoFe Prussian blue analogue and then functionalized with oligonucleotide (S1). In the presence of As(V), S1 could be released based on the stronger affinity between As(V) and Co 3 O 4 −Fe 3 O 4 cubes. After magnetic separation by Co 3 O 4 −Fe 3 O 4 cubes, the released S1 was used to trigger the catalytic hairpin assembly (CHA) and hybridization chain reaction, resulting in the formation of lots of G-quadruplex structures on the AgInS 2 /ITO electrode. Then, the capture of FePc by the G-quadruplex led to the switch of the photocurrent polarity of the AgInS 2 /ITO electrode from the anode to the cathode. Thus, As(V) was sensitively assayed with a low detection limit of 1.0 nM and a wide linear response range from 10 nM to 200 μM. This meets the detection requirement of the World Health Organization for the arsenic concentration in drinking water [less than 10 μg L −1 (130 nM)]. In addition, whether it was cationic or anionic interferents except phosphate (PO 4 3− ), only As(V) could generate the cathodic photocurrent, effectively avoiding the false-positive or false-negative results during As(V) assay. Interestingly, As(V) was also simultaneously separated from the detection system by Co 3 O 4 −Fe 3 O 4 magnetic cubes. The proposed photoelectrochemical platform may have a great potential application for the selective detection of As(V) in environmental fields.

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Section: Introductionmentioning

confidence: 99%

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Xiao

Zhang

et al. 2022

Anal. Chem.

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“…The nanoparticles structure is a leading factor aimed at the coercivity Factor for nanocrystals due to their superficial anisotropy [29] . And these magnetic nanoparticles due to their high capacity to store information got tremendous technological applications [25,30] The typical spinel structure represented as (M1−xFex) [MxFe2−x]O4 (M is the metal ion) has a 32 O 2− anions, in between these at a particular interstitial sites metal ion are distributed and ideally termed as the face-centered cubic unit cell [31] . In that coordination compounds, round brackets indicate tetrahedral (X site) and square brackets designate the and octahedral (Y site), and x implies the inversion parameter [32] .…”

Section: Introductionmentioning

confidence: 99%

“…Another burning issue for social awareness is to control water pollution [33,34] . Our environment is commonly distributed with Heavy metals around [31] . All types of ecological pyramids are affected by these.…”

Section: Introductionmentioning

confidence: 99%

Zinc and cobalt nano ferrites and their potential applications in environmental sustainability

Ganachari

et al. 2020

Preprint

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Fundamental research and industrially applied research, currently depend on magnetic oxide nanoparticles and ferromagnetic oxides due to their extensive applications for electronic, magnetic, optical sensor and absorptive activities. ferromagnetic substances mainly contain different type of Ferrite. Ferrite material constitutes, Iron oxide (Fe2O3) and divalent metal oxides of Transition metals like cobalt, nickel etc. The key objective of this paper is to study the impending applications of nano - ferrites doped with bivalent transition metals with their properties. Low-Temperature Self-Propagating combustion method was used to synthesize the particles. Synthesized Zinc and Cobalt Nano ferrites from the chemical co-precipitation method were found to be of 20 to 90 nm in average size, and comparative study of their properties using the results of Fourier-transform spectroscopy (FTIR) and X-ray powder diffraction (XRD). The Field Emission Scanning Electron Microscope (FESEM) confirms the conception of ferrite nanoparticles with a structure type cubic spinel. Further comparative Sensing studies showed that the sample displays variation in resistance when gases are passed over the surface, and the change in resistance is observed.

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Fe3O4 nanoparticle decorated novel magnetic metal oxide microcomposites for the catalytic degradation of 4-nitrophenol for wastewater cleaning applications

Özkan

Aslan

Koç

et al. 2021

J Mater Sci: Mater Electron

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Fe3O4/Co3O4 core-shell nanocomposites modified structure and properties of heavy metal oxide diamagnetic glasses

Cited by 14 publications

References 52 publications

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Zinc and cobalt nano ferrites and their potential applications in environmental sustainability

Fe3O4 nanoparticle decorated novel magnetic metal oxide microcomposites for the catalytic degradation of 4-nitrophenol for wastewater cleaning applications

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Fe3O4/Co3O4 core-shell nanocomposites modified structure and properties of heavy metal oxide diamagnetic glasses

Cited by 14 publications

References 52 publications

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co3O4–Fe3O4 Cubes and the Negative-Background Signal Strategy

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co3O4–Fe3O4 Cubes and the Negative-Background Signal Strategy

Zinc and cobalt nano ferrites and their potential applications in environmental sustainability

Fe3O4 nanoparticle decorated novel magnetic metal oxide microcomposites for the catalytic degradation of 4-nitrophenol for wastewater cleaning applications

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Product

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Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy

Highly Selective Photoelectrochemical Assay of Arsenate Based on Magnetic Co₃O₄–Fe₃O₄ Cubes and the Negative-Background Signal Strategy