Hydrothermal synthesis, structure, and antibacterial studies of a nanosized iron zeolite

TL;DR

This study synthesizes nanosized iron zeolite using hydrothermal methods from rice husk silica, analyzes its structure, and evaluates its antibacterial activity against various bacteria and fungi.

Contribution

It introduces a novel hydrothermal synthesis method for Fe ZSM 5 from rice husk silica and investigates its structural and antibacterial properties.

Findings

Fe ZSM 5 has a typical ZSM 5 structure with iron silicate phases.

Fe incorporation affects surface chemistry and pore structure.

Fe ZSM 5 shows selective antibacterial activity.

Abstract

The present research explores the effects of Percentage Fe incorporation on the structure and antibacterial activity of Fe ZSM 5. Silica extracted from local rice husk straw (white particles) by applying NaOH and HCl solutions for consecutive chemical treatment was used for hydrothermal synthesis of FeZSM 5 with constant Si(Fe plus Al) ratios. The chemical and physical changes of ZSM 5 and Fe ZSM 5 surfaces were investigated by X ray diffraction analysis (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV Vis spectroscopy, differential scanning calorimetry (DSC), and pore structure analysis by N2 adsorption at 196 . XRD analysis revealed the typical ZSM 5 structure with new diffraction lines attributed to the iron silicate phase. FTIR spectral analysis of ZSM 5 samples containing iron display a new band at 656 cm that is ascribed to the SiOFe group. The antibacterial activity of such coatings towards different kinds of bacteria, such as S. pneumonia, B. subtilis, E. coli and P. aeruginosa, and fungi, such as A. fumigatus and C. albicans, for investigated ZSM 5 and Fe (20 and 100 percentages) samples showed selective antibacterial actions.