Preparation of Fe3O4@Ag SERS substrate and its application in environmental Cr(VI) analysis

Du, Jingjing; Jing, Chuanyong

doi:10.1016/j.jcis.2011.02.044

Cited by 99 publications

(52 citation statements)

References 39 publications

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“…1b. This result is generally observed in many works,5,6,[11][12][13][14] being attributed to incomplete coating of the Fe 3 O 4 seeds by Ag metal. When the reaction time was increased to 1 h, the characteristic diffraction peaks of Fe 3 O 4 reflection disappeared, Scheme 1.…”

supporting

confidence: 55%

“…4 Magnetic nanoparticles covered with a thin gold or silver shell would exhibit both electrical and magnetic functions simultaneously. So, there are some works reporting the preparation and properties of noble metal/Fe 3 O 4 core-shell nanoparticles; [5][6][7][8] for example, a Fe 3 O 4 /Ag composite was obtained by sonication of Ag(NH 3 ) 2+ and (3-aminopropyl)triethoxysilane (APTES)-coated Fe 3 O 4 nanoparticle solution at room temperature in ambient air for 1 h. 5 The construction of Ag-Fe 3 O 4 heterodimeric nanoparticles involved initial synthesis of Fe 3 O 4 nanoparticles as seeds and subsequent reduction of Ag(ac) in the presence of the seeds. 6 Fe 3 O 4 nanoparticles were initially prepared by a coprecipitation method, and subsequently the heterodimer structure was formed through epitaxial growth of Ag on the Fe 3 O 4 seeds in nonpolar solution.…”

Section: Introductionmentioning

confidence: 99%

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Controlled Synthesis of Fe3O4/Ag Core–Shell Composite Nanoparticles with High Electrical Conductivity

Sun

Tian

et al. 2011

Journal of Elec Materi

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The presented method provides an easy processing route to synthesize Fe 3 O 4 / Ag core-shell composite nanoparticles. Their structures were characterized by x-ray diffraction and transmission electron microscopy. The average size of the Fe 3 O 4 core and Ag shell was about 32.0 nm and 5.0 nm (or 28.0 nm), respectively. Furthermore, magnetic measurements showed that the composite nanoparticles exhibited typical superparamagnetic behavior, specific saturation magnetization of ca. 24.0 emu/g, and intrinsic coercivity of 106.0 Oe. At the same time, high conductivity (64.7 S/cm) of the composite nanoparticles was also observed. This method provides an opportunity to synthesize other core-shell (Fe 3 O 4 ) nanoparticles in a single step.

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supporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Fe3O4/Ag Core–Shell Composite Nanoparticles with High Electrical Conductivity

Sun

Tian

et al. 2011

Journal of Elec Materi

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“…Magnetic nanocomposites: Fe 3 O 4 nanoparticles can be coated with inorganic material such as silica, gold or silver [21][22][23]. These coatings not only improve the stability of the nanoparticles in solution but also provide sites for covalent binding with specific ligands to the nanoparticle surface.…”

Section: Thermolysis Of Precursorsmentioning

confidence: 99%

Applications of Magnetite Nanoparticles for Heavy Metal Removal from Wastewater

Carlos¹,

Einschlag²,

González³

et al. 2013

Waste Water - Treatment Technologies and Recent Analytical Developments

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“…The most widely studied nano metal oxides include iron oxides, manganese oxides, aluminum oxides, CuO, NiO, ZnO and TiO 2 [25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Use of Hydrous Manganese Oxides Nanopowders as a Potential Sorbent for Selective Removal of Nickel Ions from Industrial Waste Water, Kinetics and Isotherm Studies

Ghaniem¹

2016

AJCHE

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Hydrous Manganese Oxides Nanopowders as nano adsorbent (MONs) was synthesized and characterized by Xray diffraction (XRD), scanning electron microscopy (SEM), and transform infrared spectroscopy (FT-IR). The adsorption of Ni (II) ions from aqueous solution on the MONs was investigated with variations in contact time, pH, initial Ni (II) concentration and adsorbent dosage. The results showed that the adsorption of Ni (II) onto MONs increased within 25 min and reached equilibrium gradually and removal percentage were 83%, 57%, 42% and 35% for 25 ppm, 50 ppm, 75 ppm and 100 ppm Ni (II), respectively, by using 1g/l MONs for 90 min at pH 6. The adsorption behavior of Ni (II) onto MONs was best described by the pseudo-second-order model and Freundlish isotherm. The results also indicated that the type of adsorption involved in this study is physiosorption (physical sorption) which usually takes place at low temperature. The results also revealed that MONs was a promising adsorbent for removal of Ni ions from industrial wastewater.

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Preparation of Fe3O4@Ag SERS substrate and its application in environmental Cr(VI) analysis

Cited by 99 publications

References 39 publications

Controlled Synthesis of Fe3O4/Ag Core–Shell Composite Nanoparticles with High Electrical Conductivity

Controlled Synthesis of Fe3O4/Ag Core–Shell Composite Nanoparticles with High Electrical Conductivity

Applications of Magnetite Nanoparticles for Heavy Metal Removal from Wastewater

Use of Hydrous Manganese Oxides Nanopowders as a Potential Sorbent for Selective Removal of Nickel Ions from Industrial Waste Water, Kinetics and Isotherm Studies

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