Al/SBA-15 Mesoporous Material: A Study of pH Influence over Aluminum Insertion into the Framework.

Herein, ordered mesoporous materials like SBA-15 and Al/SBA-15 were prepared using the pH adjustment method. Thus, these materials were developed in different pH of synthesis, from the pH adjustment method using a KCl/HCl solution and varying the Si/Al molar ratio (5, 25, and 75). All the ordered mesoporous materials were characterized by FRX, Al NMR, SEM, XRD, N adsorption/desorption, and CO adsorption.

Synthesis, Characterization and Photocatalytic Activity of CoFeO/FeO Dispersed in Mesoporous KIT-6.

The present work aimed to synthesize and characterize a solid based on CoFeO/FeO-KIT-6 and evaluate its performance in the photocatalytic degradation of the remazol red ultra RGB dye. By analyzing XRD, N physisorption, and Mössbauer results, it was possible to identify that the desired CoFeO/FeO phase was achieved, which maintained its structural properties. The FTIR-pyridine indicated the presence of Lewis acid sites, while TPD-CO showed a large amount of weak basic sites.

Nanocomposites based on the graphene family for food packaging: historical perspective, preparation methods, and properties.

Nanotechnology experienced a great technological advance after the discovery of the graphene family (graphene - Gr, graphene oxide - GO, and reduced graphene oxide-rGO). Based on the excellent properties of these materials, it is possible to develop novel polymeric nanocomposites for several applications in our daily routine. One of the most prominent applications is for food packaging, offering nanocomposites with improved thermal, mechanical, anti-microbial, and barrier properties against gas and water vapor.

Sequential pore wall functionalization in covalent organic frameworks and application to stable camptothecin delivery systems.

Post-synthetic modification of covalent organic frameworks (COFs) is strongly demanded in order to provide additional functionalities to their structures. However, the introduction of functional groups during the synthesis of two dimensional COFs (2D COFs) is highly discouraged, as they can interfere with the π-π stacking forces, compromising framework integrity. Here, we show that direct incorporation of nucleophyllic groups (e.

Development of a Zeolite A/LDH Composite for Simultaneous Cation and Anion Removal.

Wastewater from the oil industry is a major problem for aqueous environments due to its complexity and estimated volume of approximately 250 million barrels per day. The combination of these petroleum pollutants creates risks to human health, and their removal from the environment is considered a major problem in the world today. Thus, this work has the objective of studying the treatment of this type of effluent through the adsorption method using the following exchange materials: cationic, anionic, their combination by a sequential method, and a composite material.