Selective anion exchange with nanogated isoreticular positive metal-organic frameworks

Zhao, Xiang; Bu, Xianhui; Wu, Tao; Zheng, Shou‐Tian; Wang, Le; Feng, Pingyun

doi:10.1038/ncomms3344

Cited by 353 publications

(210 citation statements)

References 52 publications

Supporting

Mentioning

207

Contrasting

Unclassified

Order By: Relevance

“…Thiol/thio-functionalized adsorbents, including clays 10 , resins 11 , mesoporous silica [12][13][14][15][16] , activated carbons 17 , mesorporous carbons 18 and chalcogenides 19,20 , are considered very effective sorbents for Hg(II) removal from aqueous solutions due to the soft-soft interaction 21 . Recently, metal-organic frameworks (MOFs) [22][23][24][25][26][27][28] have been explored as a new type of adsorbents for mercury removal [29][30][31][32][33][34] due to their high surface areas, but they usually suffer from instability in water 29,30 or aqueous solutions with a wide pH range 34 and possess low adsorption capacity and weak affinity for Hg(II).…”

mentioning

confidence: 99%

Mercury nano-trap for effective and efficient removal of mercury(II) from aqueous solution

et al. 2014

View full text Add to dashboard Cite

Highly effective and highly efficient decontamination of mercury from aqueous media remains a serious task for public health and ecosystem protection. Here we report that this task can be addressed by creating a mercury 'nano-trap' as illustrated by functionalizing a high surface area and robust porous organic polymer with a high density of strong mercury chelating groups. The resultant porous organic polymer-based mercury 'nano-trap' exhibits a recordhigh saturation mercury uptake capacity of over 1,000 mg g À 1 , and can effectively reduce the mercury(II) concentration from 10 p.p.m. to the extremely low level of smaller than 0.4 p.p.b. well below the acceptable limits in drinking water standards (2 p.p.b.), and can also efficiently remove 499.9% mercury(II) within a few minutes. Our work therefore presents a new benchmark for mercury adsorbent materials and provides a new perspective for removing mercury(II) and also other heavy metal ions from contaminated water for environmental remediation.

show abstract

mentioning

confidence: 99%

Mercury nano-trap for effective and efficient removal of mercury(II) from aqueous solution

et al. 2014

View full text Add to dashboard Cite

show abstract

“…AO7 has a molecular weight of 350.32 g mol À1 and maximum diameter of 1.6 nm. [46] Humic acid has a molecular weight of between 1000 and 10 000 g mol À1 and a diameter of 0.5-3.3 nm. [47] It is, therefore, proposed that a greater number of the smaller AO7 molecules can penetrate into the ppAA film and, therefore, indicate an increase in the number of positively charged groups with polymerization time due to the increases in film thickness.…”

Section: Influence Of Polymerization Time On Surface Chemistry and Humentioning

confidence: 99%

Optimizing Humic Acid Removal by Modifying the Surface Chemistry of Plasma Polymerized Allylamine Coated Particles

Jarvis

Majewski

2016

Plasma Processes & Polymers

View full text Add to dashboard Cite

Plasma polymerized allylamine films were deposited onto quartz particles at low pressure to optimize humic acid removal by varying the plasma power, flow rate, and polymerization times. Increasing the plasma power increased the number of positively charged groups and humic acid removal. Increasing the allylamine flow rate increased the number of positively charged groups but maximum humic acid removal was observed at 6.48 sccm due to humic acid removal by positively charged and uncharged crosslinked species. Longer polymerization times increased the number of positively charged groups while similar humic acid removal resulted as the larger humic acid molecule cannot penetrate as readily into the film as the acid orange 7 used to determine the number of positively charged groups. Manipulation of the plasma parameters has shown to provide significant control over humic acid removal.

show abstract

“…Results revealed that RhB was also preferably adsorbed on the composite material from the MO/RhB mixture as illustrated in Figure 12(b), which may imply that the uptake of dyes is heavily influenced by molecule size along with charges. 72,73 To further validate this point, a ternary mixture of MB, RhB, and MO (50 mL, C 0(MB) = C 0(MO) = C 0(RhB) = 25 mg/L) with 25 mg of the adsorbent was investigated. As exhibited in Figure 12(c), the representative peaks of MB and RhB all disappeared quickly in mixed dyes and only the characteristic absorption peaks of MO were left, suggesting that Fe 3 O 4 /GO-NH 2 /H 3 PMo 12 O 40 could selectively capture cationic dyes when utilized in the corresponding ternary mixture.…”

Section: Selective Adsorption Ability Of the Hybrid Nanomaterials For mentioning

confidence: 99%

Magnetically Recyclable Fe3O4/GO-NH2/H3PMo12O40 Nanocomposite: Synthesis, Characterization, and Application in Selective Adsorption of Cationic Dyes from Water

Farhadi¹,

Hakimi²,

Maleki³

2017

ACSi

View full text Add to dashboard Cite

In this study, the PMo 12 O 40 3− polyanion was immobilized chemically on amino functionalized magnetic graphene oxide nanosheets. The as-prepared ternary magnetic nanocomposite (Fe 3 O 4 /GO-NH 2 /H 3 PMo 12 O 40 ) was characterized by powder X-ray powder diffraction (XRD), fourier transformation infrared spectroscopy (FTIR), Raman spectroscopy, energy dispersive spectroscopy (EDX), field emission scanning electron microscopy (FESEM), BET surface area measurements, magnetic measurements (VSM) and atomic force microscopy (AFM). The results demonstrated the successful loading of H 3 PMo 12 O 40 (~36.5 wt.%) on the surface of magnetic graphene oxide. The nanocomposite showed a higher specific surface area (77.07 m 2 /g) than pure H 3 PMo 12 O 40 (≤10 m 2 /g). The adsorption efficiency of this nanocomposite for removing methylene blue (MB), rhodamine B (RhB) and methyl orange (MO) from aqueous solutions was evaluated. The nanocomposite showed rapid and selective adsorption for cationic dyes from mixed dye solutions. The adsorption rate and capacity of Fe 3 O 4 /GO-NH 2 /H 3 PMo 12 O 40 were enhanced as compared with GO, GO-NH 2 , Fe 3 O 4 /GO-NH 2 , and H 3 PMo 12 O 40 samples due to enhanced electrostatic attraction and hydrogen-bonding interactions. The nanocomposite is magnetically separated and reused without any change in structure. Thus, it could be a promising green adsorbent for removing organic pollutants in water.

show abstract

Selective anion exchange with nanogated isoreticular positive metal-organic frameworks

Cited by 353 publications

References 52 publications

Mercury nano-trap for effective and efficient removal of mercury(II) from aqueous solution

Mercury nano-trap for effective and efficient removal of mercury(II) from aqueous solution

Optimizing Humic Acid Removal by Modifying the Surface Chemistry of Plasma Polymerized Allylamine Coated Particles

Magnetically Recyclable Fe3O4/GO-NH2/H3PMo12O40 Nanocomposite: Synthesis, Characterization, and Application in Selective Adsorption of Cationic Dyes from Water

Contact Info

Product

Resources

About