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- Title
Citric acid-pyrolysis synthesis of bismuth titanate series compounds and their photocatalytic degradation.
- Authors
Yu ying Mo; Biyang Tuo; Jianli Wang; Guanghua Nie; Yun Tang
- Abstract
Bismuth titanate based photocatalytic materials with different Bi/Ti ratios were synthesized by citric acid-pyrolysis method and used for the treatment of dye wastewater containing tartar yellow (TA). X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy were used to analyze the performance of bismuth titanate based photocatalytic materials before and after the treatment of wastewater. The results showed that Bi12TiO20 prepared at a Bi/Ti ratio of 12:1, a metal ion to citric acid substance ratio of 1:1 and a roasting temperature of 600°C had a high photocatalytic activity and was able to achieve a degradation rate of 96.18% for TA and conformed to the proposed first order kinetic equation. The vacancies and superoxide radicals are the main active substances in the photocatalytic degradation process. Bi12TiO20 (Bi/Ti = 12:1) has a loose and porous mesh structure with good crystallinity and a forbidden band width of 2.41 eV. Bi12TiO20 (Bi/Ti = 12:1) has excellent stability and is expected to provide theoretical basis and guidance for TA dye wastewater treatment industry.
- Subjects
BISMUTH; TITANATES; BISMUTH titanate; PHOTODEGRADATION; X-ray photoelectron spectroscopy; REFLECTANCE spectroscopy; WASTEWATER treatment
- Publication
Desalination & Water Treatment, 2023, Vol 293, p160
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.29532