An Accurate Growth Mechanism and Photocatalytic Degradation Rhodamine B of Crystalline Nb2O5 Nanotube Arrays

Catalysts

卷:10

Peng Gao¹  Wenjing Li¹  Libin Yang¹  Wei Guo¹  Zhiying Feng¹  Jinghao Lu¹ 

[1] Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China;

关键词: Nb₂O₅;    nanotube;    growth mechanism;    crystalline;    photocatalysis;   

DOI  :  10.3390/catal10121480

来源: DOAJ

【 摘 要 】

To effectively improve photocatalytic activity, the morphology and crystallinity of semiconductor photocatalysts must be precisely controlled during the formation process. Self-aligned Nb₂O₅ nanotube arrays have been successfully fabricated using the electrochemical anodization method. A novel growth mechanism of Nb₂O₅ nanotubes has been proposed. Starting from the initial oxidation process, the “multi-point” corrosion of fluoride ions is a key factor in the formation of nanotube arrays. The inner diameter and wall thickness of the nanotubes present a gradually increasing trend with increased dissociative fluorine ion concentration and water content in the electrolyte. With dehydroxylation and lattice recombination, the increased crystallinity of Nb₂O₅ represents a reduction of lattice defects, which effectively facilitates the separation and suppresses the recombination of photo-generated carriers to enhance their catalytic degradation activity.

【 授权许可】

Unknown