Hydrothermal Synthesis of Bi‐Doped WO3⋅0.5H2O Material with Tetragonal Pyramid‐Like Structure and Its Enhanced Photocatalytic Activity

A novel Bi‐doped WO3⋅0.5H2O nanomaterial with a tetragonal pyramid‐like structure was synthesized for the first time by a convenient and green hydrothermal method. The Bi‐doped WO3⋅0.5H2O material were successfully obtained and confirmed by XRD, XPS and EDX. Bi‐doped tetragonal pyramid‐like WO3⋅0.5H2O material exhibits excellent photocatalytic performance. The 1 mol% of Bi‐doped WO3⋅0.5H2O exhibits optimal degradation efficiency for MO, reaching 99.5% after 75 min. The enhancement of photocatalytic activity could be attributed to the doping of Bi. This is because the doping of Bi affects the morphology of WO3⋅0.5H2O, improves the crystallinity of the material, expands the light absorption range of the material and causes a slightly increase in oxygen vacancies and carrier density. In addition, the material exhibits excellent reusability under light irradiation. This study not only provides a simple strategy for constructing new metal ion doped composite materials, but also enhances the application potential of WO3‐based photocatalytic materials in the decomposition of harmful organic dyes in wastewater. In this work, we synthesized a novel Bi‐doped WO3⋅0.5H2O nanomaterial with a tetragonal pyramid‐like structure for the first time by a convenient and green hydrothermal method. The Bi‐doped WO3⋅0.5H2O material were successfully obtained and confirmed by XRD, XPS and EDX. The 1 mol% of Bi‐doped WO3⋅0.5H2O exhibits optimal degradation efficiency for MO, reaching 99.5% after 75 min. Moreover, the material exhibits excellent reusability