Mesoporous material SBA-15 of hexagonal structure was synthesised and its usefulness as a carrier for a poorly soluble drug--lacidipine (LA)--was tested. The source of silica was tetraethyl orthosilicate (TEOS) and the structure ordering agent was non-ionic surfactant Pluronic P123. SBA-15 with encapsulated LA was characterised by X-ray diffraction (XRD), infrared spectroscopy (FTIR), thermogravimetry (TG), differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). Adsorption of the therapeutically active substance was performed in anhydrous environment (chloroform). The content of the therapeutic substance in SBA-15 estimated from TG measurements reached 9%. The properties of the compound obtained were compared with those of a physical mixture of the components.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.3109/02652048.2012.692401 | DOI Listing |
J Environ Manage
January 2025
Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong 723000, PR China.
Sulfur-containing gases produced during the utilization of petroleum fuels are the main cause of air pollution. To remove organic sulfur-containing compounds from simulated gasoline, magnetic hydrophobic Cu-containing SBA-15 mesoporous molecular sieves (PMS-Cu) were prepared by magnetization of the sample, loading and reduction of copper ion and hydrophobic treatment of the sample. The composition and structure of the synthesized composites were characterized by XRD, FTIR, SEM, TEM, and XPS, which proved the successful preparation of the adsorbent PMS-Cu.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Krakow, Poland.
The resistivity of the silica SBA-15 type can be significantly improved by forming a thin layer of carbon on the pore surface. This is possible through the carbonization reaction of a surfactant used as a structure-directing agent in the synthesis of mesostructured silica materials. The synthesis of this type of silica-carbon composite (SBA-C) is based on the use of sulfuric acid to create a carbon layer from surfactant molecules encapsulated in silica mesopores.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Department of Physical Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Square 3, 20-031 Lublin, Poland.
In this article, we report on the research on the synthesis of composites based on a porous, highly ordered silica material modified by a metallic nanophase and chitosan biofilm. Due to the ordered pore system of the SBA-15 silica, this material proved to be a good carrier for both the biologically active nanophase (highly dispersed silver nanoparticles, AgNPs) and the adsorption active phase (chitosan). The antimicrobial susceptibility was determined against Gram-positive ATCC 25923, Gram-negative bacterial strains ( ATCC 25922, ATCC 700603, and ATCC 27853), and yeast ATCC 90028.
View Article and Find Full Text PDFHeliyon
December 2024
The Petroleum and Petrochemical College, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand.
Glycerol, a by-product of biodiesel production through transesterification, presents an opportunity for biodiesel industries to transform surplus glycerol into high-value chemical products. This study focuses on the development of a series of propyl sulfonic acid functionalized (PrSOH) SBA-15 catalysts, synthesized by direct synthesis of 3-mercaptopropyltrimethoxysilane (MPTMS) and tetraethoxysilane (TEOS) in an acidic medium. The catalysts were evaluated for acetylation of glycerol with acetic acid under conditions optimized through response surface methodology.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Chemical and Environmental Engineering Group, Rey Juan Carlos University, Tulipan Street s/n., 28933 Mostoles, Madrid, Spain.
Mesoporous materials with high surface area, large pore volume, and adjustable pore size are promising in the fields of adsorption and heterogeneous catalysis. In this work, ordered mesoporous ceria structures were successfully prepared via nanocasting using SBA-15 as a template, with Ce(NO)·6HO or CeCl·7HO as ceria precursors. The materials were characterized before and after template removal.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!