▎ 摘　　要

NOVELTY - A nanocomposite coating with porous bridging structure comprises a continuous and stable carbon nitride/graphene/titanium dioxide porous bridging structure. The carbon nitride and graphene form an irregular network bridging structure, which is evenly distributed on the surface of the composite coating. The titanium dioxide is bridged by carbon nitride and graphene, and is embedded in the irregular network bridging network inside and around the nanopores of the porous bridging structure having multi-level pores of 50-500 nm. USE - The nanocomposite coating is useful for preparing composite material used for inactivating virus including single-stranded DNA virus, double-stranded DNA virus, DNA and RNA retrovirus, double-stranded RNA virus, single-stranded RNA virus, naked RNA virus, viroids, influenza virus, hemagglutinin type 1 and neuraminidase type 1 (H1N1), avian influenza viruses, severe acute respiratory syndrome, norovirus, African swine fever and/or coronavirus in daily goods or public goods (all claimed). ADVANTAGE - The nanocomposite coating has ability to inactivate more than 99.5% of viruses within 1 minute, preferably 10-30 seconds under the excitation of visible light or UV light, and uses nanopores to enhance the enrichment effect of free radicals released by titanium dioxide. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a composite material, which comprises a substrate and the nanocomposite coating; and (2) preparation of the composite material, which involves (1) mixing water-soluble nitrogen-containing organic small molecules, graphene oxide, and nano-sized titanium dioxide, and evenly dispersing in water to form a mixed solution, and (2) spraying the mixed solution on the surface of the substrate, and sintering at 520-780 degrees C.