Synthesis, characterization and sorption properties of silica modified with some derivatives of β-cyclodextrin

Швец, А. В.; Belyakova, L. A.

doi:10.1016/j.jhazmat.2014.10.012

Cited by 19 publications

(8 citation statements)

References 45 publications

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“…Among them, β-cyclodextrin is one of the most commonly used macromolecules for silica modification. In order to immobilize β-cyclodextrin onto silica, two main approaches were usually applied—postsynthesis modification of silica surfaces with oligosaccharide or its derivatives [9–27] or direct co-condensation of silicon alkoxides with β-cyclodextrin or β-cyclodextrin-containing silanes [28–37]. In the first of these approaches, the modification of β-cyclodextrin with p-toluenesulfonyl chloride to construct β-cyclodextrin derivative as an important intermediate for the preparation of modified silica is often used.…”

Section: Introductionmentioning

confidence: 99%

“…In the first of these approaches, the modification of β-cyclodextrin with p-toluenesulfonyl chloride to construct β-cyclodextrin derivative as an important intermediate for the preparation of modified silica is often used. For example, thereby nanoporous β-cyclodextrin-containing silicas which differ by functional substituents of wide edge of attached cyclic oligosaccharide molecules (alcohol, bromoacetyl, thiosemicarbazidoacetyl groups) have been synthesized [27]. It was shown that driving force of metal sorption on the surface of functional β-cyclodextrin-containing silicas is the formation of inclusion complexes.…”

Section: Introductionmentioning

confidence: 99%

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Structural Variety and Adsorptive Properties of Mesoporous Silicas with Immobilized Oligosaccharide Groups

2017

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In this research, we report on the synthesis of mesoporous silicas with various quantities of immobilized oligosaccharide groups and different pore ordering degree. The hydrothermal co-condensation of tetraethyl orthosilicate and β-cyclodextrin-containing organosilane in the presence of cetyltrimethylammonium bromide template was employed. The purpose of this investigation was to show the opportunity of increasing β-cyclodextrin content in silica matrix by changing the molar ratio of initial reagents during organosilane synthesis and to determine whether the enhancing of immobilized groups on the surface influences on model aromatic compound adsorption from water. It was prepared several β-cyclodextrin-organosilanes by modification of (3-aminopropyl)triethoxysilane with oligosaccharide (the molar composition of reaction mixtures were 1:1, 3:1, and 5:1) with using N,N′-carbonyldiimidazole as linking agent. Three types of MCM-41 materials were obtained with 0.018, 0.072, and 0.095 mmol g−1 β-cyclodextrin-group loading according to chemical analysis of silicas. The IR spectroscopy and potentiometric titration were also performed to confirm the presence of functional groups in the silica matrix. Nitrogen sorptometry experiments exhibited the decrease of high surface area (from 812 to 457 m2 g−1) and the average pore diameter (from 1.06 to 0.60 cm3 g−1) of synthesized silicas with increasing of immobilized oligosaccharide groups. The influence of β-cyclodextrin-organosilane presence on the forming of hexagonally arranged porous structure of silicas was evaluated by X-ray diffraction and TEM analyses. As the loading of oligosaccharide groups increases in obtained silicas, the (100) reflex in diffraction patterns is even less intense and broader, denoting the decrease of long-range pore ordering. Adsorption experiments were carried out to study the effect of β-cyclodextrin groups’ attendance in silica matrix on benzene uptakes from aqueous solutions. Experimental kinetic curves of benzene adsorption on synthesized silicas were compared with theoretical models of Lagergren and Ho-McKay for pseudo-first and pseudo-second-order processes. Langmuir and Freundlich isotherm models were used to evaluate adsorption processes and parameters. Obtained β-cyclodextrin-containing MCM-41 silicas demonstrate adsorption level performance of known samples and could be very promising for benzene uptakes from aqueous solutions in water treatment processes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Variety and Adsorptive Properties of Mesoporous Silicas with Immobilized Oligosaccharide Groups

2017

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“…Therefore, they can also enable relatively facile synthesis of innovative materials for applications in the field of pollution removal from various compartments of the environment such as water, air and soil. However, the preparation steps of the traditionally modified cyclodextrin are quite complicated, with large amounts of reagents used, the cost is relatively high, and the yield of the intermediate product is low [ 23 ]. The latest application of nanomaterials in wastewater treatment provided us with the idea to construct a kind of structure in accordance with the nanoscale adsorbent based on the covalent immobilization of β-CD [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Cyclodextrin-Functionalized Hybrid Silicon Wastewater Nano-Adsorbent Material and Its Adsorption Properties

Qiu

Fan

et al. 2018

Molecules

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A novel cyclodextrin-functionalized hybrid silicon nano-adsorbent material (6-EA-β-CD-Si) was synthesized via the nucleophilic substitution method. The structure was detected by Fourier transform infrared (FT-IR), X-ray, thermogravimetric analysis, and Brunauer-Emmett-Teller (BET) analysis. Results reveal that the BET surface area of 6-EA-β-CD-Si is 240 m2/g and the average pore size is 4.16 nm. The adsorption properties of 6-EA-β-CD-Si onto methylene blue (MB) were studied and fitted with adsorption kinetic models. Both the Freundlich adsorption isotherm model and pseudo-second-order model were fitted with well shows that the multi-layer adsorption with chemisorption and physisorption co-existing in the system. The maximum adsorption capacities are 39.37, 39.21, 36.90, and 36.36 mg/g at temperatures 303, 313, 323, and 333 K, respectively. The maximum removal rate of MB could reach 99.5%, indicating the potential application value of 6-EA-β-CD-Si in wastewater treatment. The adsorption mechanisms of 6-EA-β-CD-Si showed that the hydrophobic cave of β-CD plays an important role on the adsorption of MB.

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“…However, this relation is hardly true, since the material doesn't contain any functional inorganic groups. Other types of sorbents include inorganic matrix (silica [5][6][7], zirconia [8] or clay [9]) functionalized with organic fragments. Synthetic (for instance, double hydrated oxides [10]) and natural (clays [11][12][13], zeolites [13]) materials modified with surfactants can be related to intermediate types of sorbents.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles of zirconium hydrophosphate framed with a weakly-acidic cation-exchange polymer

Ponomaryova¹,

Dzyazko²,

Volfkovich³

et al. 2018

Him. Fiz. Tehnol. Poverhni

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Synthesis, characterization and sorption properties of silica modified with some derivatives of β-cyclodextrin

Cited by 19 publications

References 45 publications

Structural Variety and Adsorptive Properties of Mesoporous Silicas with Immobilized Oligosaccharide Groups

Structural Variety and Adsorptive Properties of Mesoporous Silicas with Immobilized Oligosaccharide Groups

A Novel Cyclodextrin-Functionalized Hybrid Silicon Wastewater Nano-Adsorbent Material and Its Adsorption Properties

Nanoparticles of zirconium hydrophosphate framed with a weakly-acidic cation-exchange polymer

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