Thiol group functionalization of mesoporous SiO 2 SBA-15 using supercritical CO 2

Tenorio, Maria; Morère, Jacobo; Carnerero, C.; Torralvo, M.J.; Pando, Concepción; Cabañas, Albertina

doi:10.1016/j.micromeso.2017.07.056

Cited by 19 publications

(25 citation statements)

References 47 publications

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“…This indicates that an increase in reaction time could promote the infiltration of the precursor into the silica pores. Similar results were obtained in our previous studies for the surface modification of silica SBA-15 with DMAPTS and TMS in scCO2 [19,46]. The effect of the AEAPTS molar fraction on the grafting density was also studied at 12.5 MPa and 313 K for both cosolvents, methanol and ethanol.…”

Section: Functionalization Of Silica Sba-15 With Aeaptssupporting

confidence: 83%

Functionalization of Silica SBA-15 with [3-(2-Aminoethylamino)Propyl] Trimethoxysilane in Supercritical CO2 Modified with Methanol or Ethanol for Carbon Capture

et al. 2020

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The CO2 adsorption process using amine-grafted silica is a promising technology for reducing the CO2 emissions from the power and industry sectors. In this work, silica SBA-15 was functionalized using [3-(2-aminoethylamino)propyl] trimethoxysilane (AEAPTS) in supercritical CO2 (scCO2) modified with 10% mol methanol or ethanol. The functionalization experiments were carried out at 323 K and 12.5 MPa, and with reaction times of 2 and 3 h. The molar fraction of AEAPTS in scCO2 plus 10% mol alcohol ranged from 0.5 × 10−3 to 1.8 × 10−3. It was found that as the molar fraction of AEAPTS increased, the amino-grafting density steadily rose, and the pore volume, surface area and pore size of the functionalized silica SBA-15 also decreased gradually. The scCO2 functionalization method was compared to the traditional toluene method. The diamine-SBA-15 prepared in the scCO2 process shows a slightly lower amine-grafting density but a higher surface area and pore volume than the ones obtained using the traditional method. Finally, the excess CO2 adsorption capacity of the materials at different temperatures and low pressure was measured. The diamine-silica SBA-15 displayed moderate excess CO2 adsorption capacities, 0.7–0.9 mmol∙g−1, but higher amine efficiency, ca. 0.4, at 298 K, due to the chemisorption of CO2. These findings show that diamine-grafted silica for post-combustion capture or direct air capture can be obtained using a media more sustainable than organic solvents.

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Section: Functionalization Of Silica Sba-15 With Aeaptssupporting

confidence: 83%

Functionalization of Silica SBA-15 with [3-(2-Aminoethylamino)Propyl] Trimethoxysilane in Supercritical CO2 Modified with Methanol or Ethanol for Carbon Capture

et al. 2020

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“…The precursor molar ratio was the metal NPs. The size of the support pores is between 6-7 nm, which agrees well with the pore size determined from N2-adsorption (6.4 nm) [39]. Average particle sizes obtained from the TEM images are reported in Table 3.…”

Section: Metal Depositionsupporting

confidence: 82%

Green preparation of PtRu and PtCu/SBA-15 catalysts using supercritical CO 2

Sánchez-Miguel

Tenorio

Morère

et al. 2017

Journal of CO2 Utilization

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“…Firstly, the FTIR spectra of the original and heated fibers were compared and shown in Figure 8. The vibrational band at 1726 cm À1 was due to deformation vibrations of adsorbed water molecules (Hoang et al, 2010;Tenorio et al, 2018). The bands nearby 833.88, 974.56, and 1451.3 cm, were ascribed to the asymmetric and symmetric Si-O stretching vibration and Si-O-Si bending vibrations respectively (Hao & Yu, 2009a;Salunkhe et al, 2018).…”

Section: Changes Of Structural Characteristics Of Superfine Glass Fibersmentioning

confidence: 99%

Effect of heat treatment on the morphology, diameter and mesoporous of superfine glass fiber

Wang

Liang³

et al. 2020

The Journal of The Textile Institute

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Superfine glass fibers have high-temperature resistance, but they are rarely used and investigated at high temperature. In this article, the morphology, diameter and mesoporous are investigated by treating the superfine glass fiber felt during 400-650 C. The result shows that the surface of heated fiber is smoother than original one; the diameter increases at 400 C, then decreases with the increasing temperature, finally decreases by 14% at 600 C; the mean mesoporous size increases with the increasing temperature, except at 500 C, it increases 5.13 times at 600 C. During heat treatment, the sizing agents gradually melt, decompose, and finally accumulate in very tinier areas on the surface of fiber; however, inside the fiber, the residual stress is released, the carbonate decomposes and melts. The released residual stress contributes to the increase of diameter, while thermal decomposition and thermal contraction cause the diameter to decrease and the mesoporous size to increase. The fiber stays in a metastable state, and has weight gain phenomenon when heated during 400-550 C, while in a stable state at 600 C, finally are destroyed at 650 C.

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Thiol group functionalization of mesoporous SiO 2 SBA-15 using supercritical CO 2

Cited by 19 publications

References 47 publications

Functionalization of Silica SBA-15 with [3-(2-Aminoethylamino)Propyl] Trimethoxysilane in Supercritical CO2 Modified with Methanol or Ethanol for Carbon Capture

Functionalization of Silica SBA-15 with [3-(2-Aminoethylamino)Propyl] Trimethoxysilane in Supercritical CO2 Modified with Methanol or Ethanol for Carbon Capture

Green preparation of PtRu and PtCu/SBA-15 catalysts using supercritical CO 2

Effect of heat treatment on the morphology, diameter and mesoporous of superfine glass fiber

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