Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Sn4+ and S2− co-doped N–TiO2−x nanoparticles for efficient and photocatalytic removal of contaminants

Author affiliations

Abstract

N–TiO2−x nanoparticles (NPs) were selected as a basic construction unit because there are many Ti3+ and O vacancies on its surface. When S2− and Sn4+ are co-doped into the N–TiO2−x lattice, the O2− and Ti4+ atoms can be replaced, respectively. The formation of dopant energy levels from Sn4+ and S2− in Sn4+/S2−/N–TiO2−x causes an obvious red shift to the visible light region. The recombination rate of the e/h+ pairs was significantly reduced due to the fast migration and separation of the electrons as a result of the energy level doping from Sn4+ and S2− and the formation of electron traps with Sn4+. The N–TiO2−x NP band gap was significantly narrowed from 3.07 eV to 0.77 eV upon co-doping with Sn4+ and S2−, resulting in the superior photocatalytic activity of the Sn4+/S2−/N–TiO2−x NPs. The photocatalytic reduction rate of Cr(VI) increased by 11.6 times and the photodegradation rate of doxycycline hydrochloride (DH) achieved about 5.7 times that of the original N–TiO2−x NPs. This study provided a simple approach to preparing metal and non-metal co-doped N–TiO2−x NPs, which could greatly improve the removal efficiency of contaminants via their synergistic effect.

Graphical abstract: Sn4+ and S2− co-doped N–TiO2−x nanoparticles for efficient and photocatalytic removal of contaminants

Back to tab navigation

Supplementary files

Article information


Submitted
08 Mar 2020
Accepted
14 Jun 2020
First published
15 Jun 2020

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Sn4+ and S2− co-doped N–TiO2−x nanoparticles for efficient and photocatalytic removal of contaminants

J. He, J. Ye, K. Ge, J. Cao, C. Fu, Z. Li, Y. Zhang and Y. Yang, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/D0CY00463D

Social activity

Search articles by author

Spotlight

Advertisements