Deactivation and Regeneration of NaTaO3 Photocatalyst in Cooperating Dehydrogenation Coupling of Isopropanol and Hydrogenation Coupling of Acetone Reaction System. (25th March 2018)

• Record Type: Journal Article
• Authors: Cao, Baoyue; Yu, Yan; Xu, Shan; Wang, Xiangting; Zhang, Li; Wang, Zhijian; Wang, Shumin; Zhang, Guochun
• Is Part Of: Photochemistry and photobiology. Volume 94:Number 3(2018)
• Page Start: 466
• Page End: 471
• Publication Date: 2018-03-25
• Subjects: Photochemistry -- Periodicals; Light -- Physiological effect -- Periodicals; 541.35
• DOI: 10.1111/php.12856
• Languages: English
• ISSNs: 0031-8655

Abstract

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 photoactivity 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 10m 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. Abstract : Photocatalyst activity is influenced by many factors: adsorption of by‐products, runoff of surface hydroxyl groups, and carriers. We developed a simple and efficient photocatalyst regeneration method. Results indicated that NaTaO3 photocatalyst lost its photoactivity after three reaction cycles 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 deactivated NaTaO3 with 10m 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.