Minute-made and low carbon fingerprint microwave synthesis of high quality templated mesoporous silica

Chaignon, Jérémy; Bouizi, Younès; Davin, Laia; Calin, Nathalie; Albela, Belén; Bonneviot, Laurent

doi:10.1039/c5gc00038f

Cited by 22 publications

(27 citation statements)

References 45 publications

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“…It was synthesized using cetyltrimethylammonium tosylate surfactant and ultra-fast autoclaving under microwave heating at 180°C [26]. reflection, which is consistent with a partial coverage of the channel surface by organic moieties without the collapse of the pore structure.…”

Section: Resultsmentioning

confidence: 99%

Surface engineering and palladium dispersion in MCM-41 for methane oxidation

Zribi

Albela

Bonneviot

et al. 2015

Applied Catalysis A: General

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Section: Resultsmentioning

confidence: 99%

Surface engineering and palladium dispersion in MCM-41 for methane oxidation

Zribi

Albela

Bonneviot

et al. 2015

Applied Catalysis A: General

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“…The low-angle XRD patterns of samples in Figure 1 display three characteristic peaks corresponding to the (100), (110), and (200) plane diffractions, respectively, typical of the hexagonal structure (p6mm symmetry) of MCM-41 [ 21 , 22 ]. In addition to the broad peak originating from the amorphous SiO 2 at around 20° [ 23 ], no other obvious peaks were observed between 2θ of 10° and 70° ( Figure S1 ), showing the absence of any crystalline phase related to P species.…”

Section: Resultsmentioning

confidence: 99%

Metal-Free Phosphated Mesoporous SiO2 as Catalyst for the Low-Temperature Conversion of SO2 to H2S in Hydrogen

Gaber

Baker

et al. 2021

Nanomaterials

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Highly active metal-free mesoporous phosphated silica was synthesized by a two-step process and used as a SO2 hydrogenation catalyst. With the assistance of a microwave, MCM-41 was obtained within a 10 min heating process at 180 °C, then a low ratio of P precursor was incorporated into the mesoporous silica matrix by a phosphorization step, which was accomplished in oleylamine with trioctylphosphine at 350 °C for 2 h. For benchmarking, the SiO2 sample without P precursor insertion and the sample with P precursor insertion into the calcined SiO2 were also prepared. From the microstructural analysis, it was found that the presence of CTAB surfactant was important for the incorporation of active P species, thus forming a highly dispersed, ultrafine (uf) phosphate silica, (Si-P) catalyst. The above approach led to the promising catalytic performance of uf-P@meso-SiO2 in the selective hydrogenation of SO2 to H2S; the latter reaction is very important in sulfur-containing gas purification. In particular, uf-P@meso-SiO2 exhibited activity at the temperature range between 150 and 280 °C, especially SO2 conversion of 94% and H2S selectivity of 52% at 220 °C. The importance of the CTAB surfactant can be found in stabilizing the high dispersion of ultrafine P-related species (phosphates). Intrinsic characteristics of the materials were studied using XRD, FTIR, EDX, N2 adsorption/desorption, TEM, and XPS to reveal the structure of the above catalysts.

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“…e XRD patterns of the obtained materials are shown in Figure 1. All MnLUS catalysts revealed four well-resolved peaks corresponding to the diffraction caused by the lattice planes (100), (110), (200), and (210) which is characteristic of mesoporous silica with a well-ordered hexagonal porous array [27,28]. e distance between two adjacent pore centers in the hexagonal structure of LUS and the lattice parameters (a o ) are gathered in Table 1, and all the above results are in good agreement with the literature results [29,30].…”

Section: Resultsmentioning

confidence: 99%

Structural and Oxidative Properties of Manganese Incorporated Mesostructure Silica for Methane Oxidation

Dardouri

Gannouni

Zina

2019

Advances in Materials Science and Engineering

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Manganese catalysts containing templated mesostructured porous silica were prepared using different methods of preparation, namely, the direct hydrothermal (DHT), solid-state ion exchange (SSI), template ion exchange (TIE), and impregnation (Imp) methods. The physical-chemical properties of materials were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, FT-IR, TEM, EDX, UV-Vis, EPR, and H2 TPR techniques. The results of this study indicate that the obtained catalysts retained their hexagonal mesopore structure after introducing Mn into MCM-41. On the contrary, the crystalline phase of manganese oxide was stabilized on the external surface and inside the mesoporosity of the MCM-41 and seems to be dependent on the synthesis method used. Catalytic performances of synthesized materials were then investigated in methane oxidation at atmospheric pressure. The results showed that the metal loading and catalysts synthesis procedure influence the catalytic performance of the obtained materials. Moreover, the activity of the catalyst depends on the crystalline phase and particularly on the environment of the active phase.

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Minute-made and low carbon fingerprint microwave synthesis of high quality templated mesoporous silica

Abstract: International audienc

Cited by 22 publications

References 45 publications

Surface engineering and palladium dispersion in MCM-41 for methane oxidation

Surface engineering and palladium dispersion in MCM-41 for methane oxidation

Metal-Free Phosphated Mesoporous SiO2 as Catalyst for the Low-Temperature Conversion of SO2 to H2S in Hydrogen

Structural and Oxidative Properties of Manganese Incorporated Mesostructure Silica for Methane Oxidation

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