Zeolite-based photocatalysts immobilized on aluminum support by plasma electrolytic oxidation

TL;DR

This study explores the creation of zeolite-containing oxide coatings on aluminum via plasma electrolytic oxidation, highlighting how processing conditions and zeolite type influence photocatalytic and anti-corrosion performance.

Contribution

It introduces a novel method for immobilizing zeolites on aluminum using plasma electrolytic oxidation and evaluates how different zeolite types and processing times affect coating properties.

Findings

Ce-exchanged zeolites enhance photocatalytic activity.

Ce-exchanged 13X zeolite coatings show superior anti-corrosion properties.

Optimal processing in pulsed DC for 30 minutes yields highest photocatalytic performance.

Abstract

The preparation and properties of zeolite-containing oxide coatings obtained by plasma electrolytic oxidation are investigated and discussed. Pure and Ce-exchanged natural (clinoptilolite) and synthetic (13X) zeolites are immobilized on aluminum support from silicate-based electrolyte. Obtained coatings are characterized with respect to their morphology, phase and chemical composition, photocatalytic activity and anti-corrosion properties. It is observed that all mentioned properties of obtained coatings are dependent on processing time and type of immobilized zeolite. Coatings with Ce-exchanged zeolite show higher photocatalytic activity and more effective corrosion protection than those with pure zeolite. The highest photocatalytic activity is observed for coatings processed in pulsed a DC regime for 30 minutes containing Ce-exchanged 13X zeolite, followed by those containing Ce-exchanged clinoptilolite. Pronounced anti-corrosion properties feature almost all samples containing Ce-exchanged 13X zeolite.