Comparative Study of Tributyltin Adsorption onto  Mesoporous Silica Functionalized with Calix[4]arene,  p-tert-Butylcalix[4]arene and p-Sulfonatocalix[4]arene

Alahmadi, Sana M.; Mohamad, Sharifah; Maah, Mohd Jamil

doi:10.3390/molecules19044524

Cited by 10 publications

(5 citation statements)

References 54 publications

(72 reference statements)

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“…The catalyst shows an isotherm very similar to type IV, characteristic of mesoporous materials. 65,66 The hysteresis loop is of type H2, which is typical of those materials having a bulky organic group located in the pore channel, thereby rendering a bottleneck constriction. 66 Hence, a distorted isotherm is observed with low surface area.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…65,66 The hysteresis loop is of type H2, which is typical of those materials having a bulky organic group located in the pore channel, thereby rendering a bottleneck constriction. 66 Hence, a distorted isotherm is observed with low surface area. The large hysteresis loop (in the 0.1 to 1.0 P/P 0 range) indicates multilayer adsorption followed by capillary condensation in the high relative pressure region.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Biogenic Nano-CuO-Catalyzed Facile C–N Cross-Coupling Reactions: Scope and Mechanism

Halder

Islam

Ansari

et al. 2016

ACS Sustainable Chem. Eng.

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We demonstrate here a green and efficient biogenic synthesis of copper(II) oxide nanoparticles using easily available Ocimum Sanctum leaf extract at room temperature. The biogenic copper oxide nanoparticles have shown excellent activity on N-arylation of cyclic and acyclic amides with aryl and styryl halides. Broad substrate scope, excellent functional group tolerance, and high yields were observed. This protocol is also extended for the N-arylation of substituted aryl amines and nitrogen heterocycles including pyrole, indole, imidazole, benzimidazole, and carbazole. The catalyst was characterized by EPR, UV, FT-IR, BET, AAS, TGA analysis, XPS, XRD, and HR-TEM.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Biogenic Nano-CuO-Catalyzed Facile C–N Cross-Coupling Reactions: Scope and Mechanism

Halder

Islam

Ansari

et al. 2016

ACS Sustainable Chem. Eng.

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“…Koble-Carrigan isotherm model is a three-parameter equation which incorporates both Langmuir and Freundlich isotherms for representing equilibrium adsorption data [55]. The linear form of this module is represented by the following equation [56]:…”

Section: Koble-carrigan Isothermmentioning

confidence: 99%

Modelling and Interpretation of Adsorption Isotherms

Ayawei

Ebelegi

Wankasi

2017

Journal of Chemistry

1,924

885

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The need to design low-cost adsorbents for the detoxification of industrial effluents has been a growing concern for most environmental researchers. So modelling of experimental data from adsorption processes is a very important means of predicting the mechanisms of various adsorption systems. Therefore, this paper presents an overall review of the applications of adsorption isotherms, the use of linear regression analysis, nonlinear regression analysis, and error functions for optimum adsorption data analysis.

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“…The values of p 1 revealed that the adsorption reaction stoichiometry would be 1 solute molecule per free adsorbent site. 36 These results suggested that BzP was mainly adsorbed onto MIP(MAA-b-CD) by 1 : 1 mechanism (monolayer sorption). Meanwhile, the Koble-Corrigan model did not fit to MIP(MAA) equilibrium data, revealing that the MIP(MAA) only participated in homogeneous uptake, referring to the results obtained from the Langmuir model.…”

Section: Adsorption Isothermsmentioning

confidence: 76%

Influence of polymer morphology on the adsorption behaviors of molecularly imprinted polymer‐methacrylic acid functionalized β‐cyclodextrin

Asman

Mohamad

Sarih

2015

J of Applied Polymer Sci

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The influence of molecularly imprinted polymer-methacrylic acid functionalized b-cyclodextrin (MIP(MAA-b-CD)) morphology on the adsorption behavior studies towards benzylparaben (BzP) was explored. The effects of time, concentration, and temperature towards BzP uptake were extensively evaluated. The adsorption performance of MIP(MAA-b-CD) was compared with that on the molecularly imprinted polymer-methacrylic acid (MIP(MAA)) synthesized without b-CD. The MIP(MAA-b-CD) was synthesized to obtain a spherical and spongy-porous texture with a broad pore size distribution. The MIP(MAA-b-CD) showed fast kinetic and the intra-particle diffusion model demonstrated a three step (surface and pore) adsorption process. The Koble-Corrigan isotherm was the most suitable model for data fitting, which indicated that MIP(MAA-b-CD) had homogeneous and heterogeneous surfaces. This finding clearly demonstrated that the large uptake and strong affinity of MIP(MAA-b-CD) did not only probably result from the monomer-template interactions, but also due to the morphological MIP(MAA-b-CD) structure. In contrary to MIP(MAA-b-CD), MIP(MAA) synthesized with uniform morphology and narrow pore size distribution had lower adsorption capacities and its kinetic data fitted the pseudo-second order diffusion model, indicating a two-step (surface only) adsorption process. The MIP(MAA) adsorption process followed the Langmuir isotherm model referred to solely homogeneous uptake. The calculated thermodynamic parameters showed that the BzP uptake was exothermic, spontaneous, and physisorption process onto MIPs, which supported the results of kinetics and isotherm adsorption data. This study clearly revealed that the presence of b-CD improved the morphology of synthesized MIP, and automatically enhanced the adsorption behavior of MIP.

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Comparative Study of Tributyltin Adsorption onto Mesoporous Silica Functionalized with Calix[4]arene, p-tert-Butylcalix[4]arene and p-Sulfonatocalix[4]arene

Cited by 10 publications

References 54 publications

Biogenic Nano-CuO-Catalyzed Facile C–N Cross-Coupling Reactions: Scope and Mechanism

Biogenic Nano-CuO-Catalyzed Facile C–N Cross-Coupling Reactions: Scope and Mechanism

Modelling and Interpretation of Adsorption Isotherms

Influence of polymer morphology on the adsorption behaviors of molecularly imprinted polymer‐methacrylic acid functionalized β‐cyclodextrin

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