Flash induction calcination: A powerful tool for total template removal and fine tuning of the hydrophobic/hydrophilic balance in SBA-15 type silica mesoporous materials

Benamor, Taissire; Michelin, Laure; Lebeau, Bénédicte; Marichal, Claire

doi:10.1016/j.micromeso.2011.07.004

Cited by 33 publications

(37 citation statements)

References 26 publications

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“…As expected [51,52] due to the higher calcination temperature, the specific BET surface area of the Cu/SBA-r-700 sample (542 m 2 / g SiO2 ) is significantly lower than that of the Cu/SBA-r-500 adsorbent (826 m 2 / g SiO2 ). As discussed above, a higher calcination temperature leads to the contraction of the mesoporous network resulting in smaller pore size and volume (7.3 nm and 0.79 cm 3 / g SiO2 ), which is in agreement with the smaller lattice parameter deduced from low angle XRD patterns (figure 1).…”

Section: Characterization Of the Adsorbentssupporting

confidence: 69%

“…It must be emphasized that the diffraction peaks of the Cu/SBA-r-700 sample exhibit a slight shift towards higher angles which is characteristic of a smaller lattice parameter. This is attributed to the dehydroxylation reactions which occur at high temperature (700°C), resulting in the contraction of the mesoporous network as reported in the literature [51,52].…”

Section: Characterization Of the Adsorbentsmentioning

confidence: 52%

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CuO/SBA-15 materials synthesized by solid state grinding: Influence of CuO dispersion and multicycle operation on DeSO performances

Gaudin

Dorge

Nouali

et al. 2016

Applied Catalysis B: Environmental

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Section: Characterization Of the Adsorbentssupporting

confidence: 69%

Section: Characterization Of the Adsorbentsmentioning

confidence: 52%

CuO/SBA-15 materials synthesized by solid state grinding: Influence of CuO dispersion and multicycle operation on DeSO performances

Gaudin

Dorge

Nouali

et al. 2016

Applied Catalysis B: Environmental

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“…Upon increasing the treatment time to 10 h, the amount of carbon remaining drops to 0.19% for SBA-15 and 0.30% for KIT-6, indicating that the polymer remains in the mesoporous materials. Previous studies [51,55,69] have shown that, at 200 • C, the polymer decomposes and that, by calcining for 4 h at 300 • C or for 4 h at 350 • C, the polymer is removed; however, to the best of our knowledge, no work has quantified the residual polymer content. When comparing the results obtained at a higher temperature (500 • C) with those obtained at an intermediate temperature (400 • C), the difference in the amount of organic material removed is too small.…”

Section: Effect Of Calcination Temperature On the Quantity Of Polymermentioning

confidence: 99%

“…The choice of these MNS materials was based on two different factors. On the one hand, the SBA-15 is a heavily studied material, with many articles published on its functionalization [25,[56][57][58][59][60], and while KIT-6 is a relatively new material, it has already attracted much attention in studies worldwide, with some works about its functionalization [61][62][63][64][65][66][67][68]; on the other hand, the availability of silanol groups in KIT-6 has been less investigated, whereas it has already been reported for SBA-15 [51,56,[69][70][71].…”

Section: Introductionmentioning

confidence: 99%

Tunable Effect of the Calcination of the Silanol Groups of KIT-6 and SBA-15 Mesoporous Materials

et al. 2020

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The calcination process is a crucial step during SBA-15 and KIT-6 synthesis. It is used to completely remove the organic template and condense silanol groups, and it allows the determination of the textural and physical properties of these materials, depending on the adopted conditions. Moreover, calcination influences the number of silanols available on the surface of the material. The concentration of silanols is important if these materials were synthesized for use in adsorption or functionalization. To understand and optimize the silanol groups of SBA-15 and KIT-6, in this study, the temperature and time calcination parameters were varied. The experiments were performed at 300, 400, and 500 °C for 300, 400, and 500 min. The results show that the ideal temperature to preserve the silanol groups is 300 °C, but to optimize the textural properties, it is better to calcine these molecular sieves at 400 °C. A calcination for 10 h did not give better results than a calcination for 5 h, demonstrating that the former duration is excessive for use.

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“…Several researchers have reported the partial surfactant removal which is considered as sensitive step in the synthesis process [21][22][23]. Adjustment of calcination temperature and duration allowed tuning the hydrophobic/hydrophilic balance of the mesoporous MCM-41 silica materials [24]. Calcination under inert conditions was found to affect the pore structure as vacuum calcination (sublimation of pyrolysis) was favored compared to air calcination [21,25].…”

Section: Introductionmentioning

confidence: 99%

Performance of mesoporous organosilicates on the adsorption of heavy oil from produced water

Twaiq¹,

Nasser²,

Al-Ryiami³

et al. 2012

AIP Conference Proceedings

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Articles you may be interested inVisible light induced photocatalytic reduction of metals (Cr, Cu, Ni, and Zn) and its synergism with different pH, TiO2, and H2O2 doses in simulated wastewater Adsorptive removal of Zn(II) ion from aqueous solution using rice husk-based activated carbon AIP Conf.Abstract. The performance of mesoporous organosilicate materials in removal of soluble oil from wastewater is investigated. The aim of the study is to evaluate the oil adsorption over organosilicate prepared using pre-synthesis methods and compare the results with adsorption over pure siliceous mesoporous material. The materials were prepared using sol-gel technique using Dodecylamine (D) and Cetyltrimethylammonium bromide (CTAB) as surfactant templates, and Tetraethylorthosilicate (TEOS) as silica precursor. The as-synthesized mesoporous materials were treated using three different methods to remove the surfactant from the mesoporous silica including calcinations method for total removal of the surfactant, the water vapor stripping and ethanol vapor stripping were used for partial removal of the surfactants. The synthesized materials were characterized using X-ray diffraction (XRD) and nitrogen adsorption. The materials were tested for heavy oils removal from oil-water solution. The results showed that neutral surfactant organosilicates have less adsorption compare to cationic surfactant organosilicates. The results also showed that among organosilicates prepared using neutral surfactant, treated organosilicate by ethanol vapor have the highest activity in removing the oil from the oil-water solution.

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Flash induction calcination: A powerful tool for total template removal and fine tuning of the hydrophobic/hydrophilic balance in SBA-15 type silica mesoporous materials

Cited by 33 publications

References 26 publications

CuO/SBA-15 materials synthesized by solid state grinding: Influence of CuO dispersion and multicycle operation on DeSO performances

CuO/SBA-15 materials synthesized by solid state grinding: Influence of CuO dispersion and multicycle operation on DeSO performances

Tunable Effect of the Calcination of the Silanol Groups of KIT-6 and SBA-15 Mesoporous Materials

Performance of mesoporous organosilicates on the adsorption of heavy oil from produced water

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