Preparation method of targeted adsorption in-situ regeneration hydrophilic nano molecularly imprinted material

Abstract

The invention relates to the field of molecularly imprinted materials, and discloses a preparation method of a targeted adsorption in-situ regeneration hydrophilic nano molecularly imprinted material.The preparation method comprises the following steps: preparing multi-group nano carbon spheres from syrup wastewater, synthesizing carbon and nitrogen co-doped nano TiO2 carbon spheres on the surfaces of the nano carbon spheres in situ by adopting a sol-gel method, and calcining to remove cores to form a hollow structure, thereby enhancing the yield and specific surface area of the surface molecularly imprinted polymer, and having multiple binding sites and high mass transfer rate; using sulfanilamide and nitrosamine pollutants as target molecules, using resorcinol and melamine as bifunctional monomers, using a formaldehyde aqueous solution and TiO2 as double cross-linking agents, and using acetonitrile i as a pore-forming agent to form a carbon nanosphere surface molecularly imprinted hollow material so that the specific surface area of the molecularly imprinted material is increased, higher targeted adsorption capacity is achieved, operation is easy, and the use amount of chemicalagents is small; with the use of C, N-TiO2 photocatalytic material in the material, visible light is directly utilized to catalyze and degrade target molecules, and in-situ regeneration and repeated utilization of the molecularly imprinted material are realized.

Description

technical field [0001] The invention relates to the field of molecularly imprinted materials, in particular to a preparation method for targeted adsorption in-situ regeneration hydrophilic nanometer molecularly imprinted materials. Background technique [0002] Traditional molecularly imprinted polymers have several disadvantages: [0003] 1. Reagents used for preparation such as functional monomers (such as methacrylic acid, ethylene glycol dimethacrylate, 5-vinyl-8-hydroxyquinoline or tetraethyl orthosilicate, etc.), crosslinking agents (such as 2,2-Azoisobutyronitrile, Ethylene Glycol Dimethacrylate, 1,4-Diacryloylpiperazine or N,N'-1,4-Phenyldiallylamine, etc.) and porogens (such as Tetrahydrofuran) etc. are all organic reagents; [0004] 2. The preparation process is complicated, and the prepared polymer has few sites and is easy to collapse. Due to the preparation in organic solvent, the hydrophilicity is poor, and the molecular recognition ability in aqueous solutio...

AI Technical Summary

Problems solved by technology

[0004] 2. The preparation process is complicated, and the prepared polymer has few sites and is easy to collapse. Due to the preparation in organic solvent, the hydrophilicity is poor, and the molecular recognition ability in aqueous solution is weak, which limits the application in the fields of food, biology and environment;

[0005] 3. Traditional molecularly imprinted polymers are blocky and need to be further ground and sieved to obtain particles of a certain size. The shape of the particles is irregular, the particles are large, the specific surface area is small, the recognition site is not easy to access, and the template molecules are difficult to elute;

[0007] 5. After the target molecule is adsorbed, it cannot be regenerated or needs to be regenerated with a solvent, and the process is complicated

[0008] Therefore, traditional molecularly imprinted polymers have low yield and binding capacity

Images