1results about How to "Improve photon quantum efficiency" patented technology

This invention provides a visible light responsive titanium dioxide photocatalyst, its preparation method, and its application. The photocatalyst has a core-shell structure or a heterojunction interface structure and includes the following components: matrix material: modified nano-titanium dioxide; modifying material: chiral carbon quantum dots; the chiral carbon quantum dots are grown in situ or grafted onto the surface of the matrix material through Ti-O-C chemical bonds or strong electrostatic interactions; the photocatalyst utilizes the spin filtering effect generated by the CISS effect of the chiral carbon quantum dots, so that the photogenerated electrons injected into the matrix and the remaining holes are in a spin-forbidden state, thereby inhibiting recombination; this invention uses physical laws rather than simple energy level matching to inhibit recombination, significantly improving the quantum efficiency; the long-lived electrons and holes can continuously generate active free radicals, effectively overcoming the difficult-to-degrade VOCs containing benzene ring structures such as toluene, and reducing the generation of intermediate products; the raw materials used are all inexpensive chemical products, free from heavy metal pollution, and suitable for large-scale industrial production.