期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 258, 期 -, 页码 647-655出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2017.11.031
关键词
Perovskite; Tantalate; Photocatalysis; Visible light; Dye degradation
资金
- Department of Science and Technology, India under Water Technology Initiative scheme [DST/TM/WTI/2k16/258(G)]
- MHRD, New Delhi
- Deanship of Scientific Research at King Saud University, Saudi Arabia [RG-1438-078]
Nitrogen containing potassium tantalate perovskite material has been synthesized by the solvothermal method using urea (CH4N2O) as a nitrogen source. The as-prepared sample was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS). The particle size of nitrogen containing KTaO3 observed from SEM images was found to be 100-150 nm. Doping KTaO3 with nitrogen causes reduction of band gap from 3.5 to 2.54 eV. The incorporation of Nitrogen into the crystal lattice of KTaO3 not only extended the absorption of light from UV (ultraviolet) region to visible region and also enhanced the photocatalytic activity. As prepared nitrogen containing KTaO3 samples exhibit cubic-like morphology and noticed efficient photocatalytic activity towards methylene blue dye degradation under visible light illumination. The intermediates formed during photode-gradation were identified by mass spectrometry (GC-MS) and proposed suitable degradation pathway.
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