Surface immobilization of β-cyclodextrin on hybrid silica and its fast adsorption performance of p-nitrophenol from the aqueous phase

Shen, Hai‐Min; Zhu, Gong-Yuan; Wu, Yu; Wu, Hong‐Ke; Ji, Hongbing; Shi, Hang; Zheng, Yifan; She, Yuanbin

doi:10.1039/c5ra15592d

Cited by 23 publications

(12 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These easy-to-prepare and reusable materials expect to be the promising for the treatment of aqueous solutions not only from benzene but also from its derivatives. For the last years, it was shown high adsorption efficiency of β-CD-containing adsorbents in the absorption of different aromatic compounds from water [14, 18, 24–26, 29, 35, 36, 45, 46]. Nowadays, there is an increasing interest in the research and development of adsorbent with satisfying adsorption capacity, high mechanical strength, high reusability, and ready availability, especially the adsorbent based on natural products for their ready availability and excellent biocompatibility, which will not cause additional environmental pollution in their application [26, 45, 46].…”

Section: Resultsmentioning

confidence: 99%

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

2017

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

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

2017

View full text Add to dashboard Cite

show abstract

“…These phenomena can be explained as follows. In the acidic condition, both β‐CD units of the CA‐β‐CD and NAs molecules become protonated, and the electrostatic repulsion between them interfered with the efficiently adsorption of the NAs onto the CA‐β‐CD . As the pH increased, the protonation became weaker and the hydrogen bond interaction between the β‐CD units of the CA‐β‐CD and NAs molecules promoted the adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…In the acidic condition, both b-CD units of the CA-b-CD and NAs molecules become protonated, and the electrostatic repulsion between them interfered with the efficiently adsorption of the NAs onto the CA-b-CD. [36] As the pH increased, the protonation became weaker and the hydrogen bond interaction between the b-CD units of the CAb-CD and NAs molecules promoted the adsorption. Similarly, the slight reduction in the removal percentage to 67.2 % for pH 9 was believed to be the result of charge shielding.…”

Section: Effect Of System Initial Ph On the Adsorption Capacitymentioning

confidence: 99%

Adsorption of naphthenic acids from oil sand process‐affected water with water‐insoluble poly(β‐cyclodextrin‐citric acid)

Liang

Zou

2019

Can J Chem Eng

View full text Add to dashboard Cite

With polyvinyl alcohol as the main chain, a water‐insoluble poly(β‐cyclodextrin‐citric acid) was prepared as a supramolecular adsorbent for the treatment of oil sand process‐affected water (OSPW) containing naphthenic acids (NAs). FT‐IR, TGA, and SEM were used for the characterization of adsorbent, and an automatic infrared oil analyzer was used to monitor the concentration change of NAs in the water. The adsorption behaviour and mechanism were explored by adsorption kinetics and thermodynamic studies. The results showed that the adsorption process could be described well with the Langmuir isothermal adsorption model and quasi‐second‐order kinetic model, which indicated that the host‐guest interaction of β‐cyclodextrin promoted the adsorption of NAs. The discussion regarding pH indicated that the neutral condition (pH = 7) was considered the best. In addition, a molecular dynamics simulation was carried out using a Materials Studio package purchased from Accelrys to verify that the structure with polyvinyl alcohol as main chain was beneficial to adsorption. The excellent adsorption capacity (qmax was 193.42 mg · g−1) and reusability of the poly(β‐cyclodextrin‐citric acid) indicated its potential as practical adsorbent for the treatment of OSPW.

show abstract

“…Methemoglobin forms when the ferrous (Fe 2+ ) ions in heme are oxidized to the ferric (Fe 3+ ) state, and the molecule will be unable to carry oxygen to tissues. MHb can form either spontaneously or be induced to form by many substances, including chlorites, phenolic compounds and heavy metals such as copper, zinc and cobalt [37][38][39]. Normally, methemoglobin is reconverted to hemoglobin spontaneously by an enzymatic reduction within the cells.…”

Section: Blood Compatibility Testsmentioning

confidence: 99%

Structural, optical, magnetic, photocatalytic activity and related biological effects of CoFe2O4 ferrite nanoparticles

Yalçın

Özçeli̇k

İçi̇n

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Surface immobilization of β-cyclodextrin on hybrid silica and its fast adsorption performance of p-nitrophenol from the aqueous phase

Abstract: Fast adsorption of p-nitrophenol was achieved through surface immobilization of β-cyclodextrin onto hybrid silica and maintenance of its hydrophobic cavity.

Cited by 23 publications

References 79 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

Adsorption of naphthenic acids from oil sand process‐affected water with water‐insoluble poly(β‐cyclodextrin‐citric acid)

Structural, optical, magnetic, photocatalytic activity and related biological effects of CoFe2O4 ferrite nanoparticles

Contact Info

Product

Resources

About