Work

Preparation of Red TiO2 with Excellent Visible Light Absorption from Industrial TiOSO4 Solution for Photocatalytic Degradation of Dyes

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide At present, it is still difficult to significantly reduce the bandgap of TiO 2 to promote its visible light absorption. Herein, we first synthesized sulfur-doped TiO 2 from industrial TiOSO 4 and then successfully synthesized red TiO 2 nanoparticles by calcination with the N source melamine. Theoretical calculations show that predoped S could markedly decrease the formation energy and substitution energy of N-doped TiO 2, especially in high N/Ti ratios. The red TiO 2 nanoparticles have a low bandgap (2.10 eV) and exhibit remarkable visible light absorption capacity. Electron paramagnetic resonance measurements show that the red TiO 2 has abundant oxygen vacancies and Ti 3+ . The synergetic effect of Ti 3+, oxygen vacancies, and nonmetallic element doping leads to the bandgap of TiO 2 significantly being reduced. In addition, the red TiO 2 exhibits great photocatalytic activity in the visible light degradation of rhodamine B (Rh.B) and methylene blue (MB). This study provides a new idea for the preparation of TiO 2 with high visible light absorption.

Source: ACS Omega

DOI: 10.1021/acsomega.4c09262

Authors: Hong Pu, Congxue Tian, Hui Zhang

Institutions: Southwest Petroleum University, Panzhihua University, State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization

Language: English

Topic: TiO2 Photocatalysis and Solar Cells

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,935

Funders: Natural Science Foundation of Sichuan Province, Applied Basic Research Program of Sichuan Province