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Synthesis of magnetic metal-organic framework (MOF) for efficient removal of organic dyes from water.

Zhao X, Liu S, Tang Z, Niu H, Cai Y, Meng W, Wu F, Giesy JP - Sci Rep (2015)

Bottom Line: Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1).This capacity was much greater than most other adsorbents reported in the literature.In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

ABSTRACT
A novel, simple and efficient strategy for fabricating a magnetic metal-organic framework (MOF) as sorbent to remove organic compounds from simulated water samples is presented and tested for removal of methylene blue (MB) as an example. The novel adsorbents combine advantages of MOFs and magnetic nanoparticles and possess large capacity, low cost, rapid removal and easy separation of the solid phase, which makes it an excellent sorbent for treatment of wastewaters. The resulting magnetic MOFs composites (also known as MFCs) have large surface areas (79.52 m(2) g(-1)), excellent magnetic response (14.89 emu g(-1)), and large mesopore volume (0.09 cm(3) g(-1)), as well as good chemical inertness and mechanical stability. Adsorption was not drastically affected by pH, suggesting π-π stacking interaction and/or hydrophobic interactions between MB and MFCs. Kinetic parameters followed pseudo-second-order kinetics and adsorption was described by the Freundlich isotherm. Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1). This capacity was much greater than most other adsorbents reported in the literature. In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

No MeSH data available.


Related in: MedlinePlus

Nitrogen adsorption-desorption isotherm of Fe3O4/Cu3(BTC)2 (inset is the pore size distribution of Fe3O4/Cu3(BTC)2).
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f4: Nitrogen adsorption-desorption isotherm of Fe3O4/Cu3(BTC)2 (inset is the pore size distribution of Fe3O4/Cu3(BTC)2).

Mentions: The porous properties and pore structure of particles of Fe3O4/Cu3(BTC)2 were investigated by measuring nitrogen adsorption isotherms (Fig. 4). The Brunauer–Emmett–Teller (BET) surface area and total pore volume of Fe3O4/Cu3(BTC)2 were determined to be 79.52 m2g−1 and 0.09 cm3g−1, respectively. The average pore size calculated from desorption in the N2 isotherm by Barrett-Joyner-Halenda (BJH) method was 4.4 nm. The properties of large specific surface area and high porosity could provide multiple accessible channels for MB immigrating.


Synthesis of magnetic metal-organic framework (MOF) for efficient removal of organic dyes from water.

Zhao X, Liu S, Tang Z, Niu H, Cai Y, Meng W, Wu F, Giesy JP - Sci Rep (2015)

Nitrogen adsorption-desorption isotherm of Fe3O4/Cu3(BTC)2 (inset is the pore size distribution of Fe3O4/Cu3(BTC)2).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493573&req=5

f4: Nitrogen adsorption-desorption isotherm of Fe3O4/Cu3(BTC)2 (inset is the pore size distribution of Fe3O4/Cu3(BTC)2).
Mentions: The porous properties and pore structure of particles of Fe3O4/Cu3(BTC)2 were investigated by measuring nitrogen adsorption isotherms (Fig. 4). The Brunauer–Emmett–Teller (BET) surface area and total pore volume of Fe3O4/Cu3(BTC)2 were determined to be 79.52 m2g−1 and 0.09 cm3g−1, respectively. The average pore size calculated from desorption in the N2 isotherm by Barrett-Joyner-Halenda (BJH) method was 4.4 nm. The properties of large specific surface area and high porosity could provide multiple accessible channels for MB immigrating.

Bottom Line: Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1).This capacity was much greater than most other adsorbents reported in the literature.In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

ABSTRACT
A novel, simple and efficient strategy for fabricating a magnetic metal-organic framework (MOF) as sorbent to remove organic compounds from simulated water samples is presented and tested for removal of methylene blue (MB) as an example. The novel adsorbents combine advantages of MOFs and magnetic nanoparticles and possess large capacity, low cost, rapid removal and easy separation of the solid phase, which makes it an excellent sorbent for treatment of wastewaters. The resulting magnetic MOFs composites (also known as MFCs) have large surface areas (79.52 m(2) g(-1)), excellent magnetic response (14.89 emu g(-1)), and large mesopore volume (0.09 cm(3) g(-1)), as well as good chemical inertness and mechanical stability. Adsorption was not drastically affected by pH, suggesting π-π stacking interaction and/or hydrophobic interactions between MB and MFCs. Kinetic parameters followed pseudo-second-order kinetics and adsorption was described by the Freundlich isotherm. Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1). This capacity was much greater than most other adsorbents reported in the literature. In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

No MeSH data available.


Related in: MedlinePlus