Technical introduction The process flow chart of long-acting nano-photocatalytic ceramics and coatings used under visible light conditions is shown in Figure 1, and the cost list of this project is shown in Table 1. It can be seen from Table 1 that the cost price per kilogram is about 120 yuan, and an area of 5-8 square meters can be coated. The microscopic image of the composite nanoparticles and their UV-visible attraction spectra are shown in Figure 2, the degradation performance of antibiotics is shown in Figure 3, the photocatalytic degradation effect of methyl blue reagent is shown in Figure 4, and the porous photocatalytic nanoceramic is shown in Figure 5. Performance indicators Bulk density: 2.10g/cm2; apparent porosity: 49%; compressive strength: > 2MPa. At present, this technology has entered the biological trial stage, and the comparison with similar products in Japan is shown in Table 2 and Figure 6. This technology is suitable for use in the construction/building materials industry and the coatings industry.