Thermal and hydrothermal stability of amino-functionalized SBA-16 and promotion of hydrophobicity by silylation

Wei, Jianwen; Shi, Jingjin; Pan, Hua; Su, Qingfa; Zhu, Jun; Shi, Yao

doi:10.1016/j.micromeso.2008.08.003

Cited by 48 publications

(27 citation statements)

References 33 publications

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“…As an example, aminopropyl (AP) [49] and ethylene-diamine (ED) [50] were heated up to 700°C at a rate of 10°C/min in air atmosphere. The results obtained did not show any mass decrease due to a possible organic degradation in the range 200-250°C, so that the stability of these molecules was claimed.…”

Section: Infrared Spectroscopy Analysismentioning

confidence: 99%

Influence of Drying Conditions on Amine-Functionalized SBA-15 as Adsorbent of CO2

et al. 2011

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Adsorption of pure CO 2 on amine-functionalized SBA-15 mesoporous silica materials has been studied. Adsorbent materials were prepared by grafting the silica surface with aminopropyl (AP), ethylene-diamine (ED) and diethylene-triamine (DT) organosilane molecules. Materials so obtained were dried under air atmosphere at 110°C and at room temperature. CO 2 adsorption isotherms were carried out at 45°C, showing that grafted materials are very efficient for CO 2 removal at atmospheric pressure when samples are dried at 20 8 C. However, when the drying step is carried out at 110°C in air, CO 2 adsorption capacity is low. DRIFTS analysis has shown that amino groups can undergo oxidation to oxime or imine species during drying. Adsorption capacity of the materials was found to be unchanged after some consecutive adsorptiondesorption cycles, being the regeneration step performed at 110°C under vacuum.

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Section: Infrared Spectroscopy Analysismentioning

confidence: 99%

Influence of Drying Conditions on Amine-Functionalized SBA-15 as Adsorbent of CO2

et al. 2011

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“…Aminofunctionalization is one of the most commonly used modifications, which is often realized by using silane coupling agents, like (3-aminopropyl)triethoxysilane (APTES), to generate terminal amino groups (ANH 2 ) and form covalent bonds with functional groups on the surface of the modified material. Up to now, much work has been done to incorporate amino groups on the surface of mesoporous silicas like HSM, MCM-41, SBA-15, and so forth [37][38][39][40][41]. However, to our knowledge, rare efforts have been made to modify the surface of magnetically recoverable core-shell mesoporous silica composite and further study its applications in being support for HPAs.…”

Section: Introductionmentioning

confidence: 99%

Phosphotungstic acid anchored to amino–functionalized core–shell magnetic mesoporous silica microspheres: A magnetically recoverable nanocomposite with enhanced photocatalytic activity

Zhao

Chi

Yuan

et al. 2013

Journal of Colloid and Interface Science

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“…The mesoporosity of the support remains preserved after the silylation though there is a decrease in pore surface area and pore volume. Silylation also increases the hydrophobicity of the support [25,26]. Table 1 shows the characteristics of the immobilized and soluble laccase.…”

Section: Properties Of Immobilized Laccasementioning

confidence: 99%

Covalently Immobilized Laccase for Decolourization of Glucose-Glycine Maillard Products as Colourant of Distillery Wastewater

Singh

Basu

Vankelecom

et al. 2015

Appl Biochem Biotechnol

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Maillard reaction products like melanoidins are recalcitrant, high-molecular-weight compounds responsible for colour in sugarcane molasses distillery wastewater. Conventional biological treatment is unable to break down melanoidins, but extracellular laccase and manganese peroxidase of microbial origin can degrade these complex molecules. In this work, laccase was covalently immobilized on alumina pellets activated with aminopropyltriethoxysilane (APTES). The immobilization yield was 50-60 %, and the enzyme activity (886 U/L) was 5-fold higher compared to the soluble enzyme (176 U/L). The immobilized enzyme also showed higher tolerance to pH (4-6) and temperature (35-60 °C), as well as improved storage stability (49 days) and operational stability (10 cycles). Degradation of glucose-glycine Maillard products using immobilized laccase led to 47 % decolourization in 6 h at pH 4.5 and 28 °C. A comprehensive treatment scheme integrating enzymatic, microbial and membrane filtration steps resulted in 90 % decolourization.

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Thermal and hydrothermal stability of amino-functionalized SBA-16 and promotion of hydrophobicity by silylation

Cited by 48 publications

References 33 publications

Influence of Drying Conditions on Amine-Functionalized SBA-15 as Adsorbent of CO2

Influence of Drying Conditions on Amine-Functionalized SBA-15 as Adsorbent of CO2

Phosphotungstic acid anchored to amino–functionalized core–shell magnetic mesoporous silica microspheres: A magnetically recoverable nanocomposite with enhanced photocatalytic activity

Covalently Immobilized Laccase for Decolourization of Glucose-Glycine Maillard Products as Colourant of Distillery Wastewater

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