P-doped TiO2 nanoparticles film coated on ground glass substrate and the repeated photodegradation of dye under solar light irradiation

► Loading of photocatalyst. ► P-doped TiO2 nanoparticles coating on ground glass. ► Recycle of photocatalyst. ► A compact TiO2 film showed high photacatalytic reaction efficiency in the degradation of dye. The convenient reuse of photocatalysts is essential to the practical application in the degradation of organic pollutant. In this study, compact P-doped TiO2 film coated on ground glass substrate was easily achieved by layer-by-layer assembly technique. Thus such an elaborate complex system exhibited very convenient in recycling photocatalyst in the degradation of dye with high catalytic activity. The excellent performance of P-TiO2 film coated on ground glass substrates endows the assembled route potential in purifying waste water.