Research progress on degradation of VOCs by metal ions doped titanium dioxide nanoparticles

The use of anatase nanotitanium dioxide (T1O₂) is a current research hotspot in this field due to its unique features such as chemical stability, non-toxicity, resistance to photocorrosion and low capital, etc., in the degradation of wastewater and photocatalytic degradation of VOCs. In this paper, the mechanism of VOCs degradation by titanium dioxide nanoparticles is studied, and it is found that this catalyst still has a small visible light absorption range and unstable crystalline shape, which limit its photocatalytic efficiency. Recent research results show that the modification of TiO₂ by ion doping can change its charge density, lattice structure and forbidden band width, which can effectively enhance the photocatalytic ability of TiO₂ nanoparticles and increase the utilization of visible light. In this paper, we summarize the research progress of titanium dioxide photocatalyst modification by metal ion doping and its application in production in recent years, compare and summarize different doping preparation methods, and outlook the development trend of rare metal ion doped titanium dioxide, in order to prepare highly stable and efficient titanium dioxide nanocatalysts in visible light. It provides a scientific basis and reference for the preparation of highly stable and efficient photocatalysts under visible light, and lays the foundation for the wide application in the field of VOCs degradation.