Preparation and Photocatalytic Properties of Anatase TiO₂ with Hollow Hexagonal Frame Structure

Titanium dioxide (TiO₂) has been widely used to solve energy and environmental pollution problems due to its excellent properties. In this study, the precursor (HTiOF₃) with a spherical structure composed of hexagonal prisms was prepared via a simple solvothermal method using tetrabutyl titanate, hydrofluoric acid, glacial acetic acid and isopropanol as raw materials. Then, the calcination time and temperature of the precursor were controlled to prepare anatase TiO₂ with different morphologies, and the photocatalytic performance of the prepared catalysts was studied. When the precursor was calcined at 600 °C for 7 h, the prepared TiO₂ had a unique hexagonal framework structure and exhibited excellent photocatalytic performance. The degradation rate of the RhB solution was 98.58% at 40 min and the rate of hydrogen evolution was 2508.12 μmol g^-1 h^-1.