Abstract: Water contamination with various contaminants, including organic species, is a global concern. Reclamation by safe, economic and technically feasible methods is imperative. Two perovskites, zinc titanate (ZnTiO₃) and manganese titanate (MnTiO₃), mixed with TiO₂ phases, have been prepared as nano-powders and nano-films. The materials have been characterized and used as catalysts in photodegradation of aqueous methylene blue, as a hazardous model contaminant, using solar simulated radiation. Effects of various reaction conditions on the photodegradation have been examined. The kinetics indicate the suitability of using the process at various contaminant concentrations and catalyst loadings. Both powder and film catalysts, completely remove the contaminant in less than 6 h. Powder and film forms of MnTiO₃ mixture are more efficient than ZnTiO₃ counterparts. In both perovskite mixtures, the films exhibit higher catalytic efficiency than the powders. The film materials exhibit high catalytic efficiency in both continuous flow and batch processes. Waters contaminated with various methylene blue concentrations can be treated by the film catalysts that can be recovered and reused with no technical difficulties. The results open new horizons for larger scale water purification processes.

Title

Processes

Publisher

MDPI

Publisher Country

Switzerland

Indexing

Thomson Reuters

Impact Factor

3.5

Publication Type

Both (Printed and Online)

Volume

11

Year

2023

Pages

2378