4results about How to "Crystal structure intact" patented technology

The present disclosure relates to a kind of metal organic framework adsorption material and its preparation method and use, the method comprises: S1, the suspension of containing metal organic framework raw material is carried out ultraviolet irradiation treatment, obtain the light product;S2, the light product is carried out solid-liquid separation, obtain the solid product;Wherein, the wavelength of ultraviolet irradiation treatment is 200-400nm.The method provided in the present disclosure can efficiently and accurately regulate defect concentration, the crystal structure and morphology of the material prepared are intact, and have more active sites.The metal organic framework adsorption material provided in the present disclosure has excellent adsorption performance when used for adsorbing antibiotics.

The invention belongs to the technical field of new material preparation, and particularly discloses a high-entropy halogen-terminated MXene material and a preparation method thereof.The preparation method comprises the following steps that S1, a high-entropy MAX sample, an etching agent and molten salt raw materials are mixed according to the proportion, and then high-temperature annealing treatment is conducted under inert gas protection; s2, heating and washing with a washing solvent until impurities are removed, and then carrying out suction filtration and washing with ultrapure water until the solution is neutral; and S3, carrying out drying treatment to obtain the accordion-shaped multi-layer and single-end-group high-entropy MXene. According to the high-entropy halogen-terminated MXene material and the preparation method thereof, precise regulation and control of surface functional groups of high-entropy MXene are realized, and the application performance of the high-entropy halogen-terminated MXene material in the target fields of energy storage, catalysis and the like is improved by regulating and controlling the reaction temperature and the heat preservation time in the molten salt and directionally regulating and controlling the types of the surface functional groups of the product through the etching agent.

This invention proposes an ABX3 seed-induced crystallization perovskite thin film and a method for preparing the same for photovoltaic cells. The ABX3 seed-induced crystallization perovskite thin film contains potassium stannate. This ABX3 seed-induced crystallization perovskite thin film exhibits high crystallinity and good stability.

The application belongs to the technical field of functional materials and food safety, and particularly relates to a nano iron / titanium dioxide / cyclodextrin metal organic framework composite as well as a preparation method and application thereof. The gamma-cyclodextrin and alkali liquor are mixed in water to obtain a crystallization mother liquor of the cyclodextrin metal organic framework; then the nano ferroferric oxide and nano titanium dioxide are added into the crystallization mother liquor of the cyclodextrin metal organic framework, and ultrasonic mixing is performed to obtain a nano iron / titanium dioxide / cyclodextrin / potassium hydroxide composite solution; and then filtering and growth culturing are sequentially performed to obtain the nano iron / titanium dioxide / cyclodextrin metal organic framework composite. The nano iron / titanium dioxide / cyclodextrin metal organic framework composite exhibits significantly enhanced crystal growth kinetics characteristics, exhibits excellent renewable performance, and can be recycled through simple centrifugal separation, thereby overcoming the technical defects of the cyclodextrin metal organic framework material in the prior art.