Manipulating the Structure and Characterization of Sr1-xLaxTiO3 Nanocubes toward the Photodegradation of 2-Naphthol under Artificial Solar Light
| Autor: | Thi-Que-Phuong Phan, Van-Huy Nguyen, Vy Anh Tran, Ngoc-Quoc-Duy Vo, Minh-Vien Le, Chao-Wei Huang, Quoc-Cuong Le |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Photoluminescence
Materials science Scanning electron microscope 02 engineering and technology TP1-1185 010402 general chemistry 01 natural sciences Catalysis La-doped SrTiO3 X-ray photoelectron spectroscopy 2-naphthol degradation Physical and Theoretical Chemistry Photodegradation QD1-999 perovskite Perovskite (structure) Dopant photocatalyst Chemical technology 021001 nanoscience & nanotechnology 0104 chemical sciences Chemistry Chemical engineering hydrothermal method Photocatalysis 0210 nano-technology Visible spectrum |
| Zdroj: | Catalysts, Vol 11, Iss 564, p 564 (2021) Catalysts Volume 11 Issue 5 |
| ISSN: | 2073-4344 |
| Popis: | Effective La-doped SrTiO3 (Sr1-xLaxTiO3, x = 0–0.1 mol.% La-doped) nanocubes were successfully synthesized by a hydrothermal method. The influence of different La dopant concentrations on the physicochemical properties of the host structure of SrTiO3 was fully characterized. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) revealed that the Sr2+ in the crystal lattice of SrTiO3 was substituted by La3+. As a result, the absorption region of the Sr1-xLaxTiO3 could be extended to visible light. Scanning electron microscopy (SEM) images confirmed that their morphologies are associated with an increased surface area and an increased La-doping concentration. The decrease in the photoluminescence (PL) intensity of the dopant samples showed more defect levels created by the dopant La+3 cations in the SrTiO3 structure. The photocatalytic activities of Sr1-xLaxTiO3 were evaluated with regard to the degradation of 2-naphthol at typical conditions under artificial solar light. Among the candidates, Sr0.95La0.05TiO3 exhibited the highest photocatalytic performance for the degradation of 2-naphthol, which reached 92% degradation efficiency, corresponding to a 0.0196 min−1 degradation rate constant, within 180 minutes of irradiation. Manipulating the structure of Sr1-xLaxTiO3 nanocubes could produce a more effective and stable degradation efficiency than their parent compound, SrTiO3. The parameters remarkably influence the Sr1-xLaxTiO3 nanocubes’ structure, and their degradation efficiencies were also studied. Undoubtedly, substantial breakthroughs of Sr1-xLaxTiO3 nanocube photocatalysts toward the treatment of organic contaminants from industrial wastewater are expected shortly. |
| Databáze: | OpenAIRE |
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