Removal of methylene blue from aqueous solutions by an adsorbent based on metal-organic framework and polyoxometalate

Liu, Xiaoxia; Luo, Jing; Zhu, Yating; Yang, Yun; Shui-jin, Yang

doi:10.1016/j.jallcom.2015.07.065

Cited by 97 publications

(31 citation statements)

References 54 publications

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“…1 Nowadays, MOFs have attracted significant research attention in many attractive fields because of their high surface areas, tunable structures and pore sizes, low framework densities, and high pore volumes relative to other porous matrices. 2,3 These unique and outstanding features of MOFs have resulted in a vast range of promising potential applications such as catalysis, 4 luminescence, 5 magnetism, 6 drug delivery, [7][8][9][10] chemical sensing, 11 ion exchange, 12 pollutant removal in aqueous media, [13][14][15][16] and gas storage and separation. 17,18 Furthermore, owing to their large surface areas and high pore volumes, MOFs can be utilized as hosts for encapsulating large molecules to construct novel multifunctional materials.…”

Section: Introductionmentioning

confidence: 99%

Dawson-Type Polyoxometalate Incorporated into Nanoporous MIL-101(Cr): Preparation, Characterization and Application for Ultrafast Removal of Organic Dyes

Jarrah

Farhadi²

2019

ACSi

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In this work, Dawson-type K 6 P 2 W 18 O 62 polyoxometalate salt (abbreviated as P 2 W 18) was successfully encapsulated into mesoporous MIL-101(Cr) metal organic framework. The as-prepared P 2 W 18 @MIL-101(Cr) nanohybrid was characterized by FT-IR spectroscopy, XRD, Raman spectroscopy, EDX, SEM, zeta potential measurements and BET surface area. The results demonstrated the successful loading of K 6 P 2 W 18 O 62 (~36 wt.%) into porous MIL-101(Cr) framework. Compared with the pristine MIL-101(Cr), the encapsulated sample demonstrated a significant decrease in both surface area and pore volume owing to the insertion of large Dowson-type POM into the cages of MOF. The resulting P 2 W 18 @MIL-101(Cr) was applied as a new adsorbent to remove methylene blue (MB), Rhodamine B (RhB) and methyl orange (MO) organic dyes from aqueous solutions. The effect of effective parameters such as adsorbent dosage, dye concentration, pH, and the temperature was studied on the dye removal process. Furthermore, the selective adsorption of the nanohybrid was investigated towards MB/MO, MB/RhB, MO/RhB and MB/MO/RhB mixed dye solutions. The nanohybrid showed rapid and selective adsorption for cationic MB and RhB dyes from mixed dye solutions. The results indicated that the dye adsorption followed Langmuir isotherm. The thermodynamic data showed that the adsorption is an endothermic process. This nanohybrid can function as a recyclable efficien adsorbent for the rapid removal of various cationic textile dyes from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Dawson-Type Polyoxometalate Incorporated into Nanoporous MIL-101(Cr): Preparation, Characterization and Application for Ultrafast Removal of Organic Dyes

Jarrah

Farhadi²

2019

ACSi

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“…In order to show the advantages of the present adsorbent, we compared the obtained results for the removal of MB from aqueous solution by the P 5 W 30 /MIL‐101(Cr) nanocomposite with those for some similar adsorbents reported in the literature . From Table , it is clear that with respect to the adsorption conditions of time, initial dye concentration and adsorption capacities, the present method is more suitable and/or superior.…”

Section: Resultsmentioning

confidence: 95%

Yolk–shell microspheres assembled from Preyssler‐type NaP₅W₃₀O₁₁₀¹⁴⁻ polyoxometalate and MIL‐101(Cr) metal–organic framework: A new inorganic–organic nanohybrid for fast and selective removal of cationic organic dyes from aqueous media

Hoseini

Farhadi

Zabardasti

2018

Applied Organom Chemis

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Novel inorganic–organic yolk–shell microspheres based on Preyssler‐type NaP5W30O11014− polyoxometalate and MIL‐101(Cr) metal–organic framework (P5W30/MIL‐101(Cr)) were synthesized by reaction of K12.5Na1.5[NaP5W30O110], Cr(NO3)3·9H2O and terephthalic acid under hydrothermal conditions at 200°C for 24 h. The as‐prepared yolk–shell microspheres were fully characterized using various techniques. All analyses confirmed the incorporation of the Preyssler‐type NaP5W30O11014− polyoxometalate into the three‐dimensional porous MIL‐101(Cr) metal–organic framework. The results revealed that P5W30/MIL‐101(Cr) demonstrated rapid adsorption of cationic methylene blue (MB) and rhodamine B (RhB) with ultrahigh efficiency and capacity, as well as achieving rapid and highly selective adsorption of MB from MB/MO (MO = methyl orange), MB/RhB and MB/RhB/MO mixtures. The P5W30/MIL‐101(Cr) adsorbent not only exhibited a high adsorption capacity of 212 mg g−1, but also could quickly remove 100% of MB from a dye solution of 50 mg l−1 within 8 min. The effects of some key parameters such as adsorbent dosage, initial dye concentration and initial pH on dye adsorption were investigated in detail. The equilibrium adsorption data were better fitted by the Langmuir isotherm. The adsorption kinetics was well modelled using a pseudo‐second‐order model. Also, the inorganic–organic hybrid yolk–shell microspheres could be easily separated from the reaction system and reused up to four times without any change in structure or adsorption ability. The stability and robustness of the adsorbent were confirmed using various techniques.

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“…Consequently, treatment of dye-contaminated wastewaters with decontamination processes is necessary before their discharge. Adsorption of dyes on inexpensive and efficient solid supports especially on activated carbon (AC) and AC composites is one of the simplest and most economical methods for removing dyes from wastewater [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]; however, the disposal of residues is still a problem. Advanced oxidation processes (AOPs) are widely accepted as an efficient method for dye-contaminated wastewater due to complete degradation of organics into carbon dioxide and water.…”

Section: Introductionmentioning

confidence: 99%

Selective Adsorption and Photocatalytic Degradation of Dyes Using Polyoxometalate Hybrid Supported on Magnetic Activated Carbon Nanoparticles under Sunlight, Visible, and UV Irradiation

Taghdiri

2017

International Journal of Photoenergy

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In this study, magnetic activated carbon (MAC) nanoparticles were coated with an organic hybrid of silicotungstic acid that makes MAC suitable for adsorption and photocatalytic degradation of dyes. The prepared composite was characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, thermal analyses, scanning electron microscopy, vibrating sample magnetometer, and N 2 adsorption-desorption isotherms. Dye adsorption and photocatalytic properties of composite were examined by studying the decolorization of model dyes methylene blue (MB), methyl orange (MO), rhodamine B (RhB), and their mixture solutions. The results show that the composite can selectively adsorb MB molecules from binary mixtures of MB/MO or MB/RhB, and its adsorption capacity is enhanced as compared with the MAC. The composite is also, unlike MAC, a good photocatalyst in the degradation of dyes under sunlight, visible, and UV irradiation and can be separated by magnet, recovered and reused. Removal is via combination of adsorption and then photocatalytic degradation through direct oxidation by composite or indirect oxidation by• OH radicals. While the sunlight is not able to degrade alone MO and RhB solution in the presence of composite, it degrades the MO and RhB mixed with MB solution.

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Removal of methylene blue from aqueous solutions by an adsorbent based on metal-organic framework and polyoxometalate

Cited by 97 publications

References 54 publications

Dawson-Type Polyoxometalate Incorporated into Nanoporous MIL-101(Cr): Preparation, Characterization and Application for Ultrafast Removal of Organic Dyes

Dawson-Type Polyoxometalate Incorporated into Nanoporous MIL-101(Cr): Preparation, Characterization and Application for Ultrafast Removal of Organic Dyes

Yolk–shell microspheres assembled from Preyssler‐type NaP₅W₃₀O₁₁₀¹⁴⁻ polyoxometalate and MIL‐101(Cr) metal–organic framework: A new inorganic–organic nanohybrid for fast and selective removal of cationic organic dyes from aqueous media

Selective Adsorption and Photocatalytic Degradation of Dyes Using Polyoxometalate Hybrid Supported on Magnetic Activated Carbon Nanoparticles under Sunlight, Visible, and UV Irradiation

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Removal of methylene blue from aqueous solutions by an adsorbent based on metal-organic framework and polyoxometalate

Cited by 97 publications

References 54 publications

Dawson-Type Polyoxometalate Incorporated into Nanoporous MIL-101(Cr): Preparation, Characterization and Application for Ultrafast Removal of Organic Dyes

Dawson-Type Polyoxometalate Incorporated into Nanoporous MIL-101(Cr): Preparation, Characterization and Application for Ultrafast Removal of Organic Dyes

Yolk–shell microspheres assembled from Preyssler‐type NaP5W30O11014− polyoxometalate and MIL‐101(Cr) metal–organic framework: A new inorganic–organic nanohybrid for fast and selective removal of cationic organic dyes from aqueous media

Selective Adsorption and Photocatalytic Degradation of Dyes Using Polyoxometalate Hybrid Supported on Magnetic Activated Carbon Nanoparticles under Sunlight, Visible, and UV Irradiation

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Yolk–shell microspheres assembled from Preyssler‐type NaP₅W₃₀O₁₁₀¹⁴⁻ polyoxometalate and MIL‐101(Cr) metal–organic framework: A new inorganic–organic nanohybrid for fast and selective removal of cationic organic dyes from aqueous media