The effect of structure modifying agents in the SBA-15 for its application in the biomolecules adsorption

Santos, Sandra; Cecilia, Juan Antonio; Vilarrasa-García, Enrique; Silva, Ivanildo J.; Rodríguez‐Castellón, Enrique; Azevedo, Diana C. S.

doi:10.1016/j.micromeso.2016.06.004

Cited by 48 publications

(37 citation statements)

References 77 publications

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“…The sharp peak at 1646 cm -1 indicates that the formed -OH groups (H-O-H) [15,25]. The bands at the peak 3468 cm -1 were defined to the band group H-O-H (H 2 O molecules) [26]. In fact, the characterization of SBA-15 samples is identified with similar spectra in the mesostructure of the various synthesized of SBA-15.…”

Section: Ftir Spectroscopy Analysismentioning

confidence: 78%

Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol

Thahir¹,

Wahab

Nafie

et al. 2019

Open Chemistry

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The high surface area of mesoporous silica SBA-15 has been synthesized successfully by hydrothermal treatment with direct addition of PVA, triblock copolymer (P123) as a direct structure agent and tetraethyl orthosilicate (TEOS) as a precursor. The mesoporous silica SBA-15 have been characterized with nitrogen physisorption, scanning electron microscopy, Fourier transformed infrared spectroscopy, and x-ray diffraction. Measurement of nitrogen sorption indicated that with the addition of PVA, the surface area is increased but the pore volume and pore diameter is not significantly. The short time of hydrothermal treatment (20 h) and using x-ray diffraction, showed that the morphological structure of silica SBA-15 can be changed to a orthorhombic crystal system. The result of the FTIR and SEM-EDX characteristic indicated the functional groups and morphology of the SBA-15 with a narrow pore size distribution. The BET method has exhibited the largest surface area 1726 m2/g, pore volume 1.4 cm3/g, and pore diameter 3.2 nm. It can be suggested that the silica mesoporous SBA-15 will have potential application prospect in catalysis, storage, and adsorbent.

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Section: Ftir Spectroscopy Analysismentioning

confidence: 78%

Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol

Thahir¹,

Wahab

Nafie

et al. 2019

Open Chemistry

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“…It can be observed how the reflections of the SBA-100 are significantly more intense than those shown for MCF-100, which reveals that the SBA-15 presents a more ordered structure than the MCFs. Regarding this evidence, several authors (Nguyen et al, 2008;Santos et al, 2016) have pointed out that the incorporation of a swelling agent, as TMB, causes an increase of the volume occupied by the hydrophobic template in the micelle core. This gives rise to structures with larger pore size, as suggested by the shift of the (100) reflection at lower 2θ values in the case of the MCF-100; however, this also leads to a partial loss of the typical hexagonal arrangement of SBA-15.…”

Section: Characterization Of the Mcfsmentioning

confidence: 99%

“…The synthesis of the MCFs was carried out following the procedure described by Santos et al with slight modifications (Santos et al, 2016). Briefly, the template (P123) and NH 4 F were dissolved in an acid solution of HCl 1.7 molL −1 by stirring at 40 • C. After total dissolution of the template, TMB, used as pore expanding agent, was added to the mother solution dropwise.…”

Section: Synthesis Of the Porous Silicas (Mcfs)mentioning

confidence: 99%

Assessing CO2 Adsorption on Amino-Functionalized Mesocellular Foams Synthesized at Different Aging Temperatures

et al. 2020

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A wide variety of solid sorbents has recently been synthesized for application in CO 2 adsorption. Among them, mesoporous silicas deserve attention because of their ability to accommodate large concentrations of different chemicals as a consequence of their surface chemistry and tunable pore structure. Functionalized materials exhibit promising features for CO 2 adsorption at high temperatures and low CO 2 concentrations. This work aimed to assess the influence of the textural properties on the performance of CO 2 adsorption on functionalized mesoporous silica. With this goal, several mesoporous silica foams were synthesized by varying the aging temperature, obtaining materials with larger pore diameter. Thus, the synthesized materials were functionalized by grafting or impregnation with 3-aminopropyltriethoxysilane, polyethylenimine, and tetraethylenepentamine as amine sources. Finally, the amino functionalized materials were assessed for CO 2 capture by means of equilibrium adsorption isotherms at 25, 45, and 65°C. Among the most outstanding results, high aging temperatures favor the performance of impregnated materials by exposing greater pore diameters. Low or intermediate temperatures favor grafting by preserving an appropriate density of silanol groups.

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“…We can compare our adsorption results with those obtained by other authors for the silica materials with pore sizes in the range of 3.9-19.2 nm. The lysozyme adsorption isotherms on SBA-15 with different pore sizes (9.8-19.2 nm) at pH = 10.6 have been reported by Santos et al [33] the adsorbed amounts were equal to 0.2 g/g (pore size 9.8 nm), 0.28 (11.7 nm), 0.47 (17.3 nm) and 0.79 (19.2 nm). In another study, MCM-41 (pore size 3.9 nm) and SBA-15 (8.8 nm) were used and LYS adsorption capacity was estimated to be 0.19 and 0.38, and 0.41 and 0.48 g/g at pH = 6 and 10.5, respectively [34].…”

Section: Adsorption Equilibrium and Kineticsmentioning

confidence: 67%

Mesocellular Silica Foams (MCFs) with Tunable Pore Size as a Support for Lysozyme Immobilization: Adsorption Equilibrium and Kinetics, Biocomposite Properties

Chrzanowska

Deryło–Marczewska

Wasilewska

2020

IJMS

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The effect of the porous structure of mesocellular silica foams (MCFs) on the lysozyme (LYS) adsorption capacity, as well as the rate, was studied to design the effective sorbent for potential applications as the carriers of biomolecules. The structural (N2 adsorption/desorption isotherms), textural (SEM, TEM), acid-base (potentiometric titration), adsorption properties, and thermal characteristics of the obtained lysozyme/silica composites were studied. The protein adsorption equilibrium and kinetics showed significant dependence on silica pore size. For instance, LYS adsorption uptake on MCF-6.4 support (pore diameter 6.4 nm) was about 0.29 g/g. The equilibrium loading amount of LYS on MCF-14.5 material (pore size 14.5 nm) increased to 0.55 g/g. However, when the pore diameter was larger than 14.5 nm, the LYS adsorption value systematically decreased with increasing pore size (e.g., for MCF-30.1 was only 0.27 g/g). The electrostatic attractive interactions between the positively charged lysozyme (at pH = 7.4) and the negatively charged silica played a significant role in the immobilization process. The differences in protein adsorption and surface morphology for the biocomposites of various pore sizes were found. The thermal behavior of the studied bio/systems was conducted by TG/DSC/FTIR/MS coupled method. It was found that the thermal degradation of lysozyme/silica composites was a double-stage process in the temperature range 165–420–830 °C.

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The effect of structure modifying agents in the SBA-15 for its application in the biomolecules adsorption

Cited by 48 publications

References 77 publications

Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol

Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol

Assessing CO2 Adsorption on Amino-Functionalized Mesocellular Foams Synthesized at Different Aging Temperatures

Mesocellular Silica Foams (MCFs) with Tunable Pore Size as a Support for Lysozyme Immobilization: Adsorption Equilibrium and Kinetics, Biocomposite Properties

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