Fabrication of magnetically responsive core–shell adsorbents for thiophene capture: AgNO3-functionalized Fe3O4@mesoporous SiO2 microspheres

Tan, Peng; Qin, Ju-Xiang; Liu, Xiaoqin; Yin, Xiaoqian; Sun, Lin‐Bing

doi:10.1039/c3ta14491g

Cited by 87 publications

(50 citation statements)

References 55 publications

(50 reference statements)

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“…The equilibrium adsorption isotherm can directly yield the conditional removal capacity to enable comparison between various adsorbents. 22 However, the removal capacity is affected by many factors, such as reaction time, competition ions, pH, and equilibrium concentration; the latter considerably affects the adsorption capacity because an increased adsorbate concentration implies a high driving force and an enhanced interaction process. 23 Too often, there is no comparison between the arsenic concentrations in natural water and those that are employed in various previously reported works.…”

Section: Resultsmentioning

confidence: 99%

Zeolitic Imidazolate Framework-8 with High Efficiency in Trace Arsenate Adsorption and Removal from Water

et al. 2014

J. Phys. Chem. C

209

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The development of highly efficient adsorbents, especially those aimed at the capture of trace (ppb, 10 −9 ) arsenate, is one of the principal challenges in the water treatment field. In this article, zeolitic imidazolate framework-8 (ZIF-8) was explored for the removal of trace arsenate from water. Results showed that ZIF-8 outperformed some other adsorbents and owned the first and highest reported adsorption capacity (76.5 mg g −1 ) at a low equilibrium concentration (9.8 μg L −1 ). Satisfactory adsorption properties (adsorption capacity, adsorption rate, adaptability to water environment, regeneration capacity) demonstrated the feasibility of using ZIF-8 as an efficient adsorbent for the removal of aquatic trace arsenate. In addition, Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra revealed the proposed mechanism of As(V) adsorption onto ZIF-8: producing large amounts of external active sites (Zn−OH) through the dissociative adsorption of water and subsequently forming an inner-sphere complex with the arsenate molecule. Insights into the adsorption process uncovered the key factors to the formation of this high removal efficiency: the hydration process to form a surface hydrogen group by dissociative adsorption of water; the high accessible surface area; and the cooperative interaction (e.g., van der Waals' force and hydrogen bonding) between As(V) species at low surface coverage.

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Section: Resultsmentioning

confidence: 99%

Zeolitic Imidazolate Framework-8 with High Efficiency in Trace Arsenate Adsorption and Removal from Water

et al. 2014

J. Phys. Chem. C

209

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“…[100,101] ADN is a process of selective adsorption of Ncompounds from fuel. [102] As adsorbents for denitrogenation activated carbon, [103 105] zeolites [106,107] and silica, [108,109] metal oxides [101,110] are usually used. The most efficient adsorbent for ADN is activated carbon, which showed the higher adsorption activity than others.…”

Section: Overview Of Methods Of Denitrogenationmentioning

confidence: 99%

Ionic liquids assisted desulfurization and denitrogenation of fuels

Zolotareva

Zazybin

Rafikova

et al. 2019

Vietnam Journal of Chemistry

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“…Despite Ag(I) species have been incorporated into various supports, like mesoporous silicas, and used as the active sites for p-complexation adsorption of organosulfur compounds, [41][42][43] the fabrication of such porous supports entails the use of costly soft-templating agents and a multi-step synthetic procedure, thus, hindering the potential of synthesizing these adsorbents on an industrial scale. As such, the development of facilely-made supports with excellent organosulfur adsorption is particularly important.…”

Section: Resultsmentioning

confidence: 99%

“…It has been proven that AgNO 3 could exist inside the frameworks of AgNO 3 -impregnated mesoporous adsorbents although the characteristic XRD diffraction peaks of AgNO 3 can not be observed. 41,42 Therefore, the majority of Ag(I) species within our polymeric skeleton should be in the form of AgNO 3 . In addition, the XRD pattern shown in Figure S2 further suggests the existence of some AgCl within the matrix.…”

Section: Resultsmentioning

confidence: 99%

“…However, no metallic Ag was detected from the corresponding UV-Vis diffuse reflectance spectrum. 41 Moreover, the incorporated Ag(I) species within the matrix are found to be uniformly dispersed with a diameter of less than 5 nm (Figure 3a). Consequently, the additional multiple-site p-complexation between the Ag(I) species and DBT molecules may account for such an excellent DBT capture performance of Ag(I)-TSPOP.…”

Section: Resultsmentioning

confidence: 99%

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Efficient adsorptive desulfurization by task‐specific porous organic polymers

Jin

Yang

et al. 2016

AIChE Journal

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A task-specific mesoporous organic polymer (TSPOP) with unique features like good porosity and rich aromatic phenyl groups was facilely made and utilized as a promising adsorptive desulfurization absorbent for the first time. The material exhibits an efficient saturated adsorption of dibenzothiophene (DBT), as high as 111.1 mg g 21. In addition, the intrinsic mesoporous skeleton of TSPOP gave rise to a facile incorporation of uniform Ag(I) species inside the network which facilitated the uptake of organosulfur compounds. A significantly higher saturated DBT adsorption for Ag(I)-loaded TSPOP reaches 203.7 mg g 21 via a multiple-site interaction. A detailed model study based on the density functional calculation provides a deeper understanding of the origin of this high activity. In addition to the p-p stacking between DBT and phenyl rings, there exists an additional p-complexation adsorption with Ag(I) ions, thus, significantly improving the DBT capture performance.

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Fabrication of magnetically responsive core–shell adsorbents for thiophene capture: AgNO3-functionalized Fe3O4@mesoporous SiO2 microspheres

Cited by 87 publications

References 55 publications

Zeolitic Imidazolate Framework-8 with High Efficiency in Trace Arsenate Adsorption and Removal from Water

Zeolitic Imidazolate Framework-8 with High Efficiency in Trace Arsenate Adsorption and Removal from Water

Ionic liquids assisted desulfurization and denitrogenation of fuels

Efficient adsorptive desulfurization by task‐specific porous organic polymers

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