| dc.description.abstract | With a strong oxidizing capability, ozone (O3) is a non-residual decontamination agent. In recent years, ozone has been widely used in many areas such as chemical synthesis, semiconductor surface treatment, water disinfection, food processing and medical treatment. However, ozone generators on the market are expensive and require a lot of energy to operate, which is the bottleneck for the wide application. TiO2 is a multifunctional material with various applications such as solar cells and pollutant removal. However, due to its large energy gap (3.0-3.2 eV), TiO2 can only absorb ultraviolet light, resulting in low photocatalytic efficiency. Several methods have been used to extend the absorption spectrum of TiO2 to the range of visible light, such as thermal treatment under a hydrogen atmosphere. However, it is well known that working with hydrogen is dangerous and requires special maintenance. In this study, we prepared N-TiO2-B by calcining UR-LTiO2 at 550°C under a nitrogen atmosphere, which has the same properties as black-TiO2 prepared under hydrogen atmosphere. N-TiO2-B prepared is used for ozone synthesis in combination with a plasma system to develop a novel and energy efficient ozone generation reactor by means of optimizing catalyst parameter and reactor design. The results show that N-TiO2-B as a catalyst has the highest ozone yield of 53.9 gO3/m3 with an energy efficiency of 509.32 gO3/kWh, which is about 12% higher than that before the nitrogen treatment and has a good stability. In this study, the best energy efficiency of 346 g/kWh is achieved by coating N-TiO2-B photocatalyst in the cylinder reactor, which was not as good as the packed-bed reactor energy efficiency, but still better than most studies. Therefore, this catalyst can effectively improve the performance of the plasma to enhance the ozone generation rate. | en_US |