Simple Steps for Synthesis of Silicon Oxide Mesoporous Materials Used as Template

Abstract

A novel methodology for the synthesis of silicon oxide mesoporous materials has been developed using soft reaction conditions, unlike other synthesis conditions present in the literature. The synthesis involves the use of the lyotropic liquid crystals formed by mixing the surfactant hexadecyltrimethylazanium (CTAB), sodium nitrate as catalyst, water and tetraethyl orthosilicate (TEOS) as the inorganic precursor. The silicon oxide samples were characterized by high-resolution transmission electron microscopy (HRTEM) and EDX analysis. The specific surface area of the powder and the pore size were determined by the BET method and were found to be 587 m 2 /g and 2-4 nm, respectively. The point of zero charge (pzc) determination using a zeta-meter apparatus was 3.1 showing the acid character of the surface. The template mesoporous SiO 2 samples can be used to prepare composite electrodes containing active mixed oxides, e.g. for lithium-ion batteries.

NADH Regeneration: A Case Study of Pt-Catalyzed NAD+ Reduction with H2

“…Pt/MgO exhibits a high pZC (10.3), which shows that it will be positively charged (due to a protonation process, Mg–OH 2 + ) under a reaction pH that is lower than 10.3. The pZC results are in agreement with the literature where the pZCs of SiO 2 , activated carbon and MgO were reported between 2.5 and 3.1, − 7.4 and 7.8, , and 10 and 12.5, respectively.…”

A Co and Fe bimetallic MOF with enhanced electrocatalytic oxygen evolution performance: exploring the electronic environment modifications upon Fe incorporation

“…S5, ESI†) with surface areas of 54.6, 40.5, 36.2, 20.9, and 60.2 m 2 g −1 for 2 : 1 Co–Fe-MOF, 1 : 1 Co–Fe-MOF, 1 : 2 Co–Fe-MOF, Co-MOF, and Fe-MOF respectively. 53,54 The pore diameters between 3 and 10 nm reveal the mesoporous nature of MOFs. 54,55…”

“…46 In order to analyze the changes that occurred during the OER, a post-catalysis XRD pattern was recorded after 1 h of amperometry at 1.60 V vs. Fe-MOF respectively. 53,54 The pore diameters between 3 and 10 nm reveal the mesoporous nature of MOFs. 54,55 To further decipher the composition, oxidation states of metals, and type of bonding present in the MOFs, XPS studies were performed for the Co-MOF, Fe-MOF, and 2 : 1 Co-Fe-MOF.…”

“…53,54 The pore diameters between 3 and 10 nm reveal the mesoporous nature of MOFs. 54,55 To further decipher the composition, oxidation states of metals, and type of bonding present in the MOFs, XPS studies were performed for the Co-MOF, Fe-MOF, and 2 : 1 Co-Fe-MOF. The survey spectrum of the Co-MOF, Fe-MOF, and 2 : 1 Co-Fe-MOF depicts the existence of Co, Fe, C, O, and N (ESI, † Fig.…”