Synthesis of C-N-S-Tridoped TiO2 from Vietnam Ilmenite Ore and Its Visible Light-Driven-Photocatalytic Activity for Tetracyline Degradation

In this study, C-N-S-tridoped TiO2 composite was fabricated from TiO2 prepared from ilmenite ore and thiourea by means of hydrothermal method. The obtained material was characterized by X-ray diffraction, Raman scattering spectroscopy, UV-Vis diffuse reflectance spectroscopy, nitrogen adsorption-des...

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Bibliographic Details
Published in:Journal of nanomaterials 2020, Vol.2020 (2020), p.1-14
Main Authors: Quang Khieu, Dinh, Van Thang, Bui, Nhiem, Dao Ngoc, Phi Hung, Nguyen, An, Hoang Duc, Anh, Vo Hoang, Nguyen Thi, Lan, Khac Lieu, Pham
Format: Article
Language:English
Subjects:
Antibiotics
Aqueous solutions
Catalysts
Catalytic activity
Chloromycetin
Decomposition
Electron microscopy
Ilmenite
Light
Liquid chromatography
Mass spectrometry
Methods
Methylene blue
Nanomaterials
Nitrogen
Photocatalysis
Photodegradation
Photoelectrons
Raman spectra
Reaction kinetics
Rhodamine
Surface water
Titanium dioxide
Wastewater treatment
X ray photoelectron spectroscopy
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Summary:In this study, C-N-S-tridoped TiO2 composite was fabricated from TiO2 prepared from ilmenite ore and thiourea by means of hydrothermal method. The obtained material was characterized by X-ray diffraction, Raman scattering spectroscopy, UV-Vis diffuse reflectance spectroscopy, nitrogen adsorption-desorption isotherms, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). It was found that C-N-S-tridoped TiO2 material has a large specific surface area, showing good photocatalytic activity on the degradation of antibiotic tetracycline in visible light region. The study on the mechanism of tetracycline photodegradation using the liquid chromatography with mass spectrometry was performed. It was found that tetracycline has been degraded over C-N-S-tridoped TiO2 catalyst into many different intermediates which can eventually be converted into CO2 and H2O. The kinetics of photocatalytic decomposition of tetracycline were investigated. In addition, the obtained material could catalyze well the degradation of other antibiotics (ciprofloxacin and chloramphenicol) and dyes (rhodamine-B, methylene blue, and organe red). The catalyst was stable after five recycles with slight loss of catalytic activity, which indicates great potential for practical application of C-N-S-tridoped TiO2 catalyst in treatment of wastewater containing tetracycline in particular or antibiotics in general.
ISSN:1687-4110
1687-4129
DOI:10.1155/2020/1523164