This technology features a carbon nitride-nanoclay composite created by inserting carbon nitride monolayer nanosheets between layers of layered nanoclay, resulting in lower photocatalytic activity than bulk carbon nitride. It includes UV-blocking agents, UV-blocking products, and a two-stage thermal manufacturing process.
Inorganic UV blockers like zinc oxide and titanium dioxide reflect light, causing a white cast, and fail to block the full spectrum from UVA to UVC. While carbon nitride has excellent semiconductor properties, its photocatalytic activity has made it difficult to use as a blocking material.
This technology involves intercalating a mixture of nanoclay and carbon nitride precursors via low-temperature heat treatment, followed by high-temperature polymerization between the layers. The insulating nanoclay deactivates the carbon nitride's photocatalytic properties, enhancing chemical stability while absorbing UVA, UVB, and UVC rays and allowing visible light to pass through. It can be applied to cosmetics like sunscreen, polymer films, coatings, and paints, providing a transparent, non-whitening UV-blocking material for various products.
This invention was developed with support from the Ministry of Science, ICT and Future Planning for the development of organic/inorganic nanohybrid platforms capable of tumor imaging and therapy.
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