Biodiesel Production Using Lithium Metasilicate Synthesized from Non-Conventional Sources.

A facile and versatile process to produce lithium metasilicate (LiSiO) from non-conventional silicon sources (two different sand sources from the central area of México) was developed. The synthesis protocol based on a solid-state reaction followed by a hydrothermal treatment resulted in highly pure lithium metasilicate, as corroborated by XRD, SEM-EDS, and XPS analysis. Furthermore, lithium metasilicate was used as a heterogeneous catalyst for biodiesel production from soybean oil, where conversion yields were compared according to the silicon source used (based on chemical purity, stability, and yield efficiency).

Synthesis of sodium titanates and their use in the photocatalytic degradation of NO.

The synthesis and characterization of sodium titanates (ST), and their evaluation in the photocatalytic reduction of nitric oxide (NO) are described herein. The materials were synthesized by a hydrothermal route using 5 M NaOH as the mineralizer agent and a TiO content of 0.06 mg/mL (expressed as the mass ratio of TiO/mL of NaOH), at 170 °C for 48 h, resulting in sodium tri- and hexa-titanates.

Electrochemical degradation of amoxicillin in acidic aqueous medium using TiO-based electrodes modified by oxides of transition metals.

One of the most widely used antibiotics is amoxicillin (AMX), which is the most widely used in humans and animals, but it is discharged metabolically due to its indigestibility. Conventional biological and physicochemical methods for removing AMX from water are not enough to mineralize it; it is only concentrated and transferred to produce new residues that require further processing to remove the new residues. In this research, naked and modified surfaces with TiO nanotubes (TiO) electrophoretically modified with PbO, IrO, RuO, and TaO were used to evaluate their efficiency in the electrochemical degradation of AMX in acid media (0.

Mixed Matrix Membranes Based on Fluoropolymers with and -Terphenyl Fragments for Gas Separation Applications.

Novel mixed matrix membranes (MMMs) based on fluoropolymers with - and -terphenyl fragments and NaX zeolites were prepared. The fluoropolymers were synthesized by a one-pot, room-temperature, metal-free superacid-catalyzed stoichiometric and nonstoichiometric step polymerization of 2,2,2-trifluoroacetophenone with two multiring aromatic nonactivated hydrocarbons (-terphenyl and -terphenyl). MMMs were characterized by scanning electron microscopy (SEM) and infrared (Fourier transform infrared (FTIR)) spectroscopy and used in gas permeability tests.

Optimized Production of a Redox Metabolite (pyocyanin) by NEJ01R Using a Maize By-Product.

metabolizes pyocyanin, a redox molecule related to diverse biological activities. Culture conditions for the production of pyocyanin in a defined medium were optimized using a statistical design and response surface methodology. The obtained conditions were replicated using as substrate an alkaline residual liquid of cooked maize and its by-products.