Synthesis and adsorption properties of [Cu(L)2(H2O)]H2[Cu(L)2(P2Mo5O23)]·4H2O/Fe3O4 nanocomposites

Fang, Ning; Ji, Yu-Mei; Li, Chunyan; Wu, Yuan-Yuan; Ma, Chenguang; Liu, Hongling; Li, Mingxue

doi:10.1039/c7ra02133j

Cited by 23 publications

(10 citation statements)

References 44 publications

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“…Meantime, it can be found that an obvious interface line (marked with white line) delimitate the regions of Fe 3 O 4 @ 1 and Fe 3 O 4 @ 2 . The HRTEM images indicate that parts of polyoxometalates are successfully covered in the surface of Fe 3 O 4 [31], which are in agreement with the aggregation and dispersion experiments.…”

Section: Resultssupporting

confidence: 76%

Preparation of Fe3O4@polyoxometalates Nanocomposites and Their Efficient Adsorption of Cationic Dyes from Aqueous Solution

Zhao

et al. 2019

Nanomaterials

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In this work, two magnetic adsorbents Fe3O4@1 and Fe3O4@2 were prepared by combining Fe3O4 nanoparticles and polyoxometalate hybrids [Ni(HL)2]2H2[P2Mo5O23]·4H2O (1), [H2L]5H[P2Mo5O23]·12H2O (2) (HL = 2-acetylpyridine-thiosemicarbazone). The temperature-dependent zero-field-cooled (ZFC) and field-cooled (FC) measurements indicated the blocking temperature at 160 K and 180 K, respectively. The Brunauer–Emmett–Teller (BET) surface area of Fe3O4@1 and Fe3O4@2 is 8.106 m2/g and 1.787 m2/g, respectively. Cationic dye methylene blue (MB) and anionic dye methyl orange (MO) were investigated for selective dye adsorption on Fe3O4@1 and Fe3O4@2. The two adsorbents were beneficial for selective adsorption of cationic dyes. The adsorption efficiency of MB was 94.8% for Fe3O4@1, 97.67% for Fe3O4@2. Furthermore, the two adsorbents almost maintained the same adsorption efficiency after seven runs. The maximum MB adsorption capacity of Fe3O4@1 and Fe3O4@2 is 72.07 and 73.25 mg/g, respectively. The fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) spectra of the adsorbents collected after adsorption of MB are very similar to the initial as-synthesized Fe3O4@polyoxometalates indicating the high stability of the two adsorbents. The adsorption kinetics indicated that the MB removal followed the pseudo-second-order model. These results showed that the two adsorbents had a potential application in treating wastewater.

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Section: Resultssupporting

confidence: 76%

Preparation of Fe3O4@polyoxometalates Nanocomposites and Their Efficient Adsorption of Cationic Dyes from Aqueous Solution

Zhao

et al. 2019

Nanomaterials

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“…FTIR spectroscopy technique was used to identify functional groups on the surface of the synthesized catalysts, as shown in Figure . As can be seen, the peaks at (650, 450 cm –1 ) and (940, 880 cm –1 ) are related to ν(MoO) and cis -MoO 2 , respectively. , Also, the peak at (600 and 450 cm –1 ) corresponds to the Fe(III)–O stretching vibration . Other bonds in wavelength ranges of 3750, 2350, 1530–1570, and 1060–1200 cm –1 are related to functional groups on the surface of the activated carbon support.…”

Section: Resultsmentioning

confidence: 90%

“…These bands were assigned to stretching of alcohols (O–H), alkyne group (CC), aromatic ring or quinones (−CH  groups into −C(O)– groups), and (C–O) hydroxyl, respectively. The band in the region of 1050–1150 cm –1 indicates the C–O–C vibration in cellulose and hemicellulose. − The increased bands in spectra of FeMo-cit-TAC2 are related to the acidification of the activated carbon surface. The weak peak in the range of 1100 cm –1 in FeMo-cit-AC1 spectra corresponds to hydroxyl (C–O) which is related to the presence of citric acid in the synthesizing solution.…”

Section: Resultsmentioning

confidence: 99%

Effectiveness Study of Mesoporous Size, Acidity, and Precursor Type on Characterization of Activated Carbon as an Fe–Mo Catalyst Support for Hydrodesulfurization of Heavy Naphtha

Soleymani

Karimzadeh

Rashidi³

et al. 2023

Ind. Eng. Chem. Res.

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The main goal of this research is to evaluate the effects of various parameters on the synthesis of a Fe−Mo catalyst supported on an in-house developed mesoporous activated carbon. For this purpose, mesoporous carbon has been prepared from grape branches and oil palm trunks under various activation times and drying periods. Consequently, optimum values of the aforementioned parameters have been obtained in order to synthesize an efficient support for developing a heavy naphtha hydrodesulfurization (HDS) catalyst. Subsequently, a mixture of Fe−Mo with a weight ratio of 1:3 has been loaded on the developed supports through a wet impregnation method. Various experimental analyses including X-ray diffraction (XRD), Fourier transform infrared (FTIR), Brunauer−Emmett−Teller (BET), temperature programmed desorption (TPD), temperature programmed reduction (TPR), field-emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), thermogravimetric analysis (TGA), and energy dispersive X-ray (EDX) have been undertaken to determine the characteristics of synthetic catalysts and activated carbons. Once an appropriate catalyst has been synthesized on the basis of the experimental analyses, its performance for hydrodesulfurization of heavy naphtha has been investigated and has been compared to the efficiency of a catalyst with a commercial activated carbon support. The obtained results reveal that the sulfur conversions of heavy naphtha containing 900 ppm sulfur compounds at atmospheric pressure and at 340 °C are around 78 and 55% for the desulfurization process using the synthesized catalyst in the present work and the used commercial catalyst, respectively. It has also been found that a combination of grape branches and oil palm trunks contributes to an efficient mesoporous carbon structure, an acceptable thermal stability, and the development of a cost-effective support for the synthesis of an industrially viable HDS catalyst.

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“…The POMs were synthesized using the method reported in the literature [40,42,43]: Taking Cu(ClO 4 ) 2 ·6H 2 O (0.093 g, 0.25 mmol) and pyridine-2-carboxamide (0.061 g, 0.5 mmol) in a beaker, and adding 15 mL of distilled water to prepare a solution, and stirring at 50 °C for 0.5 h. After cooling to room temperature, 10 mL aqueous solution of Na 2 MoO 4 ·2H 2 O (0.242 g, 1.0 mmol) was added to the solution, the pH was maintained at 3 by dropwise addition of concentrated H 3 PO 4 , and then the mixture was stirred for 0.5 h at room temperature and filtered. The blue precipitate obtained by filtration was dried by heating to obtain POMs.…”

Section: Methodsmentioning

confidence: 99%

“…We previously synthesized Fe 3 O 4 /POMs nanocomposites processing excellent adsorbability for cationic dyes. The magnetic Fe 3 O 4 /POMs nanocomposites are beneficial for the separation of adsorbents after processing [40]. In this work, Fe 3 O 4 , Ag, and POMs three materials are combined into a single entity by nanoengineering, the final nanostructure performing the unique properties of Fe 3 O 4 , Ag, and POMs, simultaneously, would bring out novel collective phenomena due to the interaction of Fe 3 O 4 , Ag, and POMs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe3O4/Ag/Polyoxometalates Ternary Nanocomposites

Zhan

Tian

et al. 2019

Nanomaterials

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The ternary nanocomposites Fe3O4/Ag/polyoxometalates (Fe3O4/Ag/POMs) with core–shell–core nanostructure were synthesized by coating [Cu(C6H6N2O)2(H2O)]H2[Cu(C6H6N2O)2(P2Mo5O23)]·4H2O polyoxometalates on the surface of Fe3O4/Ag (core–shell) nanoparticles. The transmission electron microscopy/high resolution transmission electron microscopy (HR-TEM) and X-ray powder diffraction (XRD) analyses show that the Fe3O4/Ag/POMs ternary nanocomposites reveal a core–shell–core nanostructure, good dispersibility, and high crystallinity. The vibrating sample magnetometer (VSM) and physical property measurement system (PPMS) demonstrated the good magnetic properties and superparamagnetic behavior of the nanocomposites at 300 K. The UV–vis spectroscopy displayed the broadband absorption of the Fe3O4/Ag/POMs with the maximum surface plasmon resonance of Ag nanostructure around 420 nm. The dye removal capacity of Fe3O4/Ag/POMs was investigated using methylene blue (MB) as a probe. Through adsorption and photocatalysis, the nanocomposites could quickly remove MB with a removal efficiency of 98.7% under the irradiation of visible light at room temperature. The removal efficiency was still as high as 97.5% even after six runs by magnetic separation of photocatalytic adsorbents after processing, indicating the reusability and high stability of the nanocomposites. These Fe3O4/Ag/POMs photocatalytic adsorbents with magnetic properties will hopefully become a functional material for wastewater treatment in the future.

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Synthesis and adsorption properties of [Cu(L)₂(H₂O)]H₂[Cu(L)₂(P₂Mo₅O₂₃)]·4H₂O/Fe₃O₄ nanocomposites

Abstract: Multifunctional [Cu(L)2(H2O)]H2[Cu(L)2(P2Mo5O23)]·4H2O/Fe3O4 (HL = pyridine-2-carboxamide) nanocomposites were successfully synthesized by combining [Cu(L)2(H2O)]H2[Cu(L)2(P2Mo5O23)]·4H2O and Fe3O4 nanoparticles.

Cited by 23 publications

References 44 publications

Preparation of Fe3O4@polyoxometalates Nanocomposites and Their Efficient Adsorption of Cationic Dyes from Aqueous Solution

Preparation of Fe3O4@polyoxometalates Nanocomposites and Their Efficient Adsorption of Cationic Dyes from Aqueous Solution

Effectiveness Study of Mesoporous Size, Acidity, and Precursor Type on Characterization of Activated Carbon as an Fe–Mo Catalyst Support for Hydrodesulfurization of Heavy Naphtha

Synthesis, Characterization and Dye Removal Behavior of Core–Shell–Shell Fe3O4/Ag/Polyoxometalates Ternary Nanocomposites

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