Rapid color degradation of organic dyes by Fe3O4@His@Ag recyclable magnetic nanocatalyst

Amir, Muhammad; Kurtan, Ü.; Baykal, A.

doi:10.1016/j.jiec.2015.01.013

Cited by 92 publications

(30 citation statements)

References 37 publications

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“…Fe 3 O 4 magnetic nanoparticles were prepared by the chemical co‐precipitation method, in which iron(III) chloride hexahydrate (4.6 g, 0.017 mol) and iron(II) chloride tetrahydrate (2.2 g, 0.011 mol) were dissolved in 100 ml of deionized water at 60 °C under nitrogen atmosphere and stirred. Then, 10.0 ml of 25% NH 4 OH was quickly injected into the reaction mixture.…”

Section: Methodsmentioning

confidence: 99%

Green synthesis of Fe₃O₄@SiO₂‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water

Mohammadi

Sheibani

2018

Applied Organom Chemis

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This paper reports the green and in situ preparation of Fe 3 O 4 @SiO 2 -Ag magnetic nanocatalyst synthesized using safflower (Carthamus tinctorius L.) flower extract without the addition of any stabilizers or surfactants. The catalytic performance of the resulting nanocatalyst was examined for the reduction of 4-nitrophenol (4-NP), methylene blue (MB) and methyl orange (MO) in an environment-friendly medium at room temperature. The main factors such as pH, temperature and amount of catalyst influencing the nanocatalyst performance were studied. The apparent rate constants for 4-NP, MO and MB reduction were calculated, being 0.756 min −1 , 0.064 s −1 and 0.09 s −1 , respectively. The catalyst was recovered using an external magnet and reused several times with negligible loss of catalytic activity. The as-synthesized nanoparticles were characterized using powder X-ray diffraction, transmission electron microscopy, UV-visible, Fourier transform infrared and inductively coupled plasma atomic emission spectroscopies, dynamic light scattering and vibrating sample magnetometry.

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Section: Methodsmentioning

confidence: 99%

Green synthesis of Fe₃O₄@SiO₂‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water

Mohammadi

Sheibani

2018

Applied Organom Chemis

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“…At present, water environmental pollution has become a major global issue. Excessive emissions of the dye effluents derived from the textile, leather, food, paper, plastic, rubber, and pharmaceutical industries are one of the most important water pollution sources [ 1 , 2 , 3 , 4 ]. These dispersed dye molecules block sunlight from reaching the lower depths of the water, reduce the dissolved oxygen level in the water, and thereby inhibit the growth and development of marine plants and animals [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient, Low-Cost, and Magnetically Recoverable FePt–Ag Nanocatalysts: Towards Green Reduction of Organic Dyes

et al. 2018

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Nowadays, synthetic organic dyes and pigments discharged from numerous industries are causing unprecedentedly severe water environmental pollution, and conventional water treatment processes are hindered due to the corresponding sophisticated aromatic structures, hydrophilic nature, and high stability against light, temperature, etc. Herein, we report an efficient fabrication strategy to develop a new type of highly efficient, low-cost, and magnetically recoverable nanocatalyst, i.e., FePt–Ag nanocomposites, for the reduction of methyl orange (MO) and rhodamine B (RhB), by a facile seed deposition process. X-ray diffraction results elaborate that the as-synthesized FePt–Ag nanocomposites are pure disordered face-centered cubic phase. Transmission electron microscopy studies demonstrate that the amount of Ag seeds deposited onto the surfaces of FePt nanocrystals increases when increasing the additive amount of silver colloids. The linear correlation of the MO and RhB concentration versus reaction time catalyzed by FePt–Ag nanocatalysts is in line with pseudo-first-order kinetics. The reduction rate constants of MO and RhB increase with the increase of the amount of Ag seeds. FePt–Ag nanocomposites show good separation ability and reusability, and could be repeatedly applied for nearly complete reduction of MO and RhB for at least six successive cycles. Such cost-effective and recyclable nanocatalysts provide a new material family for use in environmental protection applications.

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“…The as‐determined rates are very competitive with respect to previously reported values. For example, Baykal et al prepared Fe 3 O 4 @AgNPs NPs using histidine as linker by hydrothermal method for the catalytic reduction of organic dyes, and the authors reported a rate constant as 0.27 minute −1 for MB . In another implementation, Yougen and coworkers investigated the catalytic activity of recyclable monodisperse PS/silver core/shell microspheres and concluded on a rate constant of 0.316 minute −1 for the reduction of MB …”

Section: Resultsmentioning

confidence: 99%

In situ synthesis of silver nanoparticles on densely amine‐functionalized polystyrene: Highly active nanocomposite catalyst for the reduction of methylene blue

Amari

Guerrouache

Mahouche‐Chergui

et al. 2018

Polymers for Advanced Techs

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In this contribution, polystyrene (PS) bearing nitrogen-rich ligands as chelation moieties for both Ag + ions and Ag (0) nanoparticles was prepared through successive chemical modifications of native PS including nitration (treatment with HNO 3 / H 2 SO 4 ), reductive amination (treatment with SnCl 2 /HCl), Michael addition of methyl acrylate, and grafting of ethyelenediamine. The as-synthesized PS derivative was further used to support silver nanoparticles through initial chelation of the silver nanoparticle ions precursor and subsequent chemical in situ reduction with sodium borohydride. Chemical structure of the PS derivatives was confirmed after each synthesis step by using complementary characterization methods including infrared and energy-dispersive X-ray spectroscopies, elemental analysis, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The catalytic activity of the PS-EAD/AgNP nanocomposite was demonstrated using the reduction of methylene blue to leucomethylene blue, as a model reaction. The reaction was monitored by UV-vis spectrophotometry and achieved with an excess of sodium borohydride allowing for a pseudo-first-order analysis of the kinetic reaction parameters.Quantitative reduction of the methylene blue was obtained upon successive catalytic cycles with a rate constant value of 0.4016 minute −1 .

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Rapid color degradation of organic dyes by Fe3O4@His@Ag recyclable magnetic nanocatalyst

Cited by 92 publications

References 37 publications

Green synthesis of Fe₃O₄@SiO₂‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water

Green synthesis of Fe₃O₄@SiO₂‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water

Highly Efficient, Low-Cost, and Magnetically Recoverable FePt–Ag Nanocatalysts: Towards Green Reduction of Organic Dyes

In situ synthesis of silver nanoparticles on densely amine‐functionalized polystyrene: Highly active nanocomposite catalyst for the reduction of methylene blue

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Rapid color degradation of organic dyes by Fe3O4@His@Ag recyclable magnetic nanocatalyst

Cited by 92 publications

References 37 publications

Green synthesis of Fe3O4@SiO2‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water

Green synthesis of Fe3O4@SiO2‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water

Highly Efficient, Low-Cost, and Magnetically Recoverable FePt–Ag Nanocatalysts: Towards Green Reduction of Organic Dyes

In situ synthesis of silver nanoparticles on densely amine‐functionalized polystyrene: Highly active nanocomposite catalyst for the reduction of methylene blue

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Green synthesis of Fe₃O₄@SiO₂‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water

Green synthesis of Fe₃O₄@SiO₂‐Ag magnetic nanocatalyst using safflower extract and its application as recoverable catalyst for reduction of dye pollutants in water