The evolution of structure, chemical state and photocatalytic performance of α-Fe/FeTiO3/TiO2 with the nitridation at different temperatures. (November 2017)

• Record Type: Journal Article
• Authors: Zhang, S.T.; Ruan, Y.R.; Liu, C.; Wang, P.; Ma, Y.Q.
• Is Part Of: Materials research bulletin. Volume 95(2017)
• Page Start: 503
• Page End: 508
• Publication Date: 2017-11
• Subjects: Photocatalyst -- FeTiO3/TiO2 -- Nitrogen doping -- Chemical state; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.08.042
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: FeTiO3 /TiO2 has the high degradation efficiency to the methylene blue. It is observed that the nitridation of FeTiO3 /TiO2 diminishes oxygen vacancies. The extra chemical states Fe-O-Ti and Fe-N-Ti of the Ti element are observed. Our results support that Ti 3+ and oxygen vacancy are key factors to degradation. Abstract: α-Fe/FeTiO3 /TiO2 was synthesized through the reduction of Fe3 O4 @TiO2 at 800 °C, and subsequently nitrided in NH3 atmosphere at the nitridation temperature T N = 400, 600, 800 and 1000 °C. In the crystal lattice of TiO2, with increasing T N, the N element itself exhibits the chemical states of TiO2-x Nx, TiN and interstitial N, and simultaneously it induces the complex variation of the chemical state of the Ti and O elements. The photocatalytic performance of the nitrided samples is not determined only by the chemical states of the N element but by the synergistic effects of chemical states of the N, Ti and O elements.