Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1247, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2021.131329
Keywords
Bi4Ti3O12; Nitric acid activation; Oxygen vacancies center dot Photocatalytic reaction
Categories
Funding
- lanzhou university of technology [061701]
- National Youth Science Fund Project of National Natural Science Foundation of China [21802060]
- Program for Hongliu First class Discipline Construction in Lanzhou University of Technology
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The study investigated the performance of nitric acid-activated Bi4Ti3O12 and highlighted its advantages in photocatalytic degradation of RhB, TC, and Cr(VI). By removing Na+ and creating oxygen vacancies, the transport and separation efficiency of photocarriers were improved, leading to enhanced photo-redox reactions.
The first case of nitric acid-activated Bi4Ti3O12 (BTO) has been investigated. The activity of 1% molar ratio nitric acid-activated Bi4Ti3O12 (BTO-1) is 22.8 times, 2 times, and 2 times higher than BTO on photodegra-dation of rhodamine B (RhB), tetracycline hydrochloride (TC), and Cr (VI) solution, respectively. The ex-cellent improvement of the photo-redox reaction is due to the simultaneous removal of Na+ and the creation of oxygen vacancies on the photocatalyst surface, which can improve the transport and separa-tion efficiency of the photocarrier. In addition, BTO-1 has excellent photostability. This study may provide a general approach to improve the photocatalytic properties of titanates synthesized by the hydrothermal method with NaOH. (C) 2021 Elsevier B.V. All rights reserved.
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