Synthesis and surface characterization of ordered mesoporous silica SBA-15

Kokunešoski, Maja; Gulicovski, Jelena; Matović, Branko; Logar, Mihovil; Milonjić, Slobodan K.; Babić, Biljana

doi:10.1016/j.matchemphys.2010.08.066

Cited by 76 publications

(40 citation statements)

References 43 publications

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“…1e). Bare SBA-15 gives a PZC of 2.4 meanwhile copper oxide gives a higher value of 9.7, both values similar to those found in the literature [40][41][42][43]. The similitude between catalyst and SBA-15 is probably due to the poor copper oxide dispersion onto support surface.…”

Section: Catalyst Characterisationsupporting

confidence: 84%

CuO/SBA-15 catalyst for the catalytic ozonation of mesoxalic and oxalic acids. Water matrix effects

Petre

Carbajo

Rosal

et al. 2013

Chemical Engineering Journal

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Section: Catalyst Characterisationsupporting

confidence: 84%

CuO/SBA-15 catalyst for the catalytic ozonation of mesoxalic and oxalic acids. Water matrix effects

Petre

Carbajo

Rosal

et al. 2013

Chemical Engineering Journal

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“…5a. 53 The intensities of the bands related to the Si-OH and O-H groups for HMS were stronger than that of MOSF and SG, which was correspond to the corresponding titrated results of the densities of surface hydroxyl groups. The HMS presents the highest water vapor adsorption capacity of about 0.706 g g À1 owing to high density of surface hydroxyl (2.34 Â 10 20 g À1 ), which is higher than that of traditional SBA-15 and hollow spheres calcined at 550 C (0.643 g g À1 and 0.264 g g À1 , respectively, unpublished data).…”

Section: Static Adsorption and Desorption Propertiessupporting

confidence: 60%

Controlled synthesis of hexagonal mesostructure silica and macroporous ordered siliceous foams for VOCs adsorption

et al. 2015

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In this study, ordered hexagonal mesostructure siliceous materials and macroporous ordered siliceous foams were synthesized in pH ¼ 5 buffer solution by simply adjusting the reaction temperature with P123 (EO 20 PO 70 EO 20 ) as a structure-directing agent and tetramethoxysilane (TMOS) as the silica source. Increasing the reaction temperature from 15 to 35 C led to a structural evolution from ordered hexagonal mesostructure siliceous material with a pore size of 10 nm to macroporous ordered siliceous foam with a pore size of $100 nm. The adsorption and desorption performance of hexagonal mesostructure and macroporous ordered siliceous samples (HMS and MOSF) were investigated under static (water vapor, n-hexane and 93# gasoline) and dynamic (n-hexane) conditions. Compared with commercial silica gel (SG), activated carbon (AC) and HMS, MOSF show higher static adsorption capacity of n-hexane and 93# gasoline, higher dynamic n-hexane adsorption capacity, and more stable breakthrough time under dynamic adsorption conditions. The designed MOSF with highest volatile organic compounds (VOCs) removal capacity and recyclability show great potential for VOCs controlling.

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“…The registered signals are typical of a siliceous material. A very strong band was observed at 1070 cm −1 along with a shoulder at 1200 cm −1 , attributed to the asymmetrical stretching of Si–O–Si bonds . Signals at 806 cm −1 corresponding to the Si–O–Si symmetrical stretching mode could be identified, whereas peaks at 455 cm −1 were ascribed to bending vibrations of the mentioned bonds .…”

Section: Resultsmentioning

confidence: 94%

Solid phosphoric acid catalysts based on mesoporous silica for levoglucosenone production via cellulose fast pyrolysis

Santander

Álvarez

Gutierrez

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Biochemicals are interesting alternatives for biomass valorization owing to their much higher added value compared to biofuels and energy products. Several methods for the production of valuable chemicals such as levoglucosenone (LGO) via thermochemical processes over solid acid catalysts are being investigated due to their important advantages compared to conventional biomass acid impregnation techniques. The present work explores the synthesis of catalytic materials for the production of this platform molecule. RESULTS Aluminum‐loaded SBA‐15 mesoporous silica and the corresponding solid phosphoric acid (SPA) catalysts were prepared, characterized by TEM, FTIR, MAS NMR, NH3‐TPD, N2 adsorption, ICP‐AES and titration of ‘free H3PO4’, and tested in cellulose fast pyrolysis. Post‐synthesis Al deposition on the silica support produced an increase of bio‐oil yield and LGO amount in pyrolysis products. The presence of Al in SPA catalysts led to the formation of aluminum phosphates, decreasing the concentration of H3PO4 species in the surface and therefore the LGO levels. The SPAs presented relatively high LGO levels in the GC–MS detectable liquid products (up to 85 peak area%) which was found to be correlated with the amount of free H3PO4 in the solid catalysts. CONCLUSION Aluminum grafting over SBA‐15 is an effective way to increase the selectivity to the target anhydrosaccharide. In SPAs, the presence of Al reduced the easily leachable H3PO4 amount, which is desirable from the point of view of catalyst stability because deactivation is mainly caused by H3PO4 leaching, but also led to lower levels of LGO in bio‐oil. © 2018 Society of Chemical Industry

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Synthesis and surface characterization of ordered mesoporous silica SBA-15

Cited by 76 publications

References 43 publications

CuO/SBA-15 catalyst for the catalytic ozonation of mesoxalic and oxalic acids. Water matrix effects

CuO/SBA-15 catalyst for the catalytic ozonation of mesoxalic and oxalic acids. Water matrix effects

Controlled synthesis of hexagonal mesostructure silica and macroporous ordered siliceous foams for VOCs adsorption

Solid phosphoric acid catalysts based on mesoporous silica for levoglucosenone production via cellulose fast pyrolysis

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