Deactivation and Regeneration of NaTaO3 Photocatalyst in Co-operating Dehydrogenation Coupling of Isopropanol and Hydrogenation Coupling of Acetone Reaction System

Abstract

Photocatalyst activity is influenced by many factors, such as adsorption of by-products, runoff of surface hydroxyl groups, and carriers. In this study, a simple and efficient photocatalyst regeneration method was developed. Results indicated that NaTaO₃ photocatalyst lost its photo-activity after three cycles of reaction that involves coupling of isopropanol and hydrogenation coupling of acetone reaction system. Runoff of Na on the surface was the main reason for the deactivation of NaTaO₃ photocatalyst. After hydrothermal treatment of the deactivated NaTaO₃ with 10 M NaOH at 180 °C for 12 h, its photocatalytic activity was restored to the original level. The photocatalytic activity remained stable even after 10 cycles

This article is protected by copyright. All rights reserved.