by Lidiane A. Morais  , Francisco L. Castro  , Glauber J.T. Fernandes  , Marcio D.S. Araujo  , Mirna F. Farias  , Ana P.M.A. Guedes  , Valter J. Fernandes Jr  and Antonio S. Araujo

Received: 17 August 2022;  Published: 30 May 2023;  doi: 10.21926/cr.2302017

The TiO₂/MCM-41 nanomaterials were synthesized by impregnation with an excess solvent with different percentages of titanium dioxide. They were used for catalytic degradation of Benzene Toluene Ethylbenzene and Xylenes (BTEX) in the presence of hydrogen peroxide in aqueous media. The obtained materials were characterized by X-ray Diffraction, nitrogen adsorption-desorption using the BET method and Fourier Transform Infrared Spectroscopy. The nanostructured phase of the hex [...]

by Luana Góes Soares  and Annelise Kopp Alves

Received: 14 December 2022;  Published: 17 April 2023;  doi: 10.21926/cr.2302016

The synthesis of fibers by electrospinning allows for obtaining nanostructures of one-dimensional materials with good flexibility, optical and catalytic properties, high surface area and porosity. They can be used in applications such as: catalysts, solar cells, fuel cells, membranes, and hydrogen batteries, among others. Here we emphasize that few reports in the literature describe the existing synergism between the optical and photocatalytic properties of TiO₂, and the i [...]

by Erivaldo Genuíno Lima  , Fabiana Medeiros Nascimento Silva  , Tellys Lins Almeida Barbosa  and Meiry Gláucia Freire Rodrigues

Received: 20 December 2022;  Published: 07 April 2023;  doi: 10.21926/cr.2302015

This work prepared mordenite using seeds and without organic structure-directing agents (OSDAs). The Mo/Mordenite was prepared through wet impregnation and the catalysts’ performance was checked for transesterification of soybean oil with methanol. The mordenite zeolite was prepared through hydrothermal crystallization under static conditions with a molar composition of 6Na₂O:Al₂O₃:30SiO₂:780H_{2 [...]}