Turkish Journal of Chemistry
Abstract
To decrease the band gap of TiO2 and enhance its photocatalytic performance, in this work, N-doped nanocrystalline TiO2 is synthesized successfully through a simple sol-gel synthesis process with dicyandiamide used as N source. The N-doped TiO2 photocatalysts have been characterized in detail by means of powder X-ray diffraction, Raman spectroscopy, infrared spectroscopy, UV-vis spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscope. The photocatalytic activities of N-doped TiO2 to different organic pollutants are significantly different. Using 2 × 10-5 mol/L methylene blue as the target pollutant, N-doped TiO2 can produced approximately 100% conversion within 40 min, the photocatalytic degradation ability of which is equal or superior to commercial or bare TiO2. The ameliorated photocatalytic activity of N-doped TiO2 photocatalysts is attributed to the appropriate crystallinity, good dispersibility, modified Zeta potential, and increased absorption.
DOI
10.3906/kim-2103-7
Keywords
Photocatalysis, nanocrystals, nitrogen doping, titanium oxide, organic pollutants
First Page
1366
Last Page
1374
Recommended Citation
YU, X, & LV, Q (2021). N doping of TiO2 nanocrystal for efficient photodegradation of organic pollutants underultraviolet and visible light irradiation. Turkish Journal of Chemistry 45 (5): 1366-1374. https://doi.org/10.3906/kim-2103-7