2results about How to "Increase active sites" patented technology

The application belongs to the technical field of catalytic materials, and particularly relates to an oxygen vacancy modified MnO2 / Mn3O4 heterojunction material and a preparation method and application thereof. The MnO2 / Mn3O4 heterojunction material is obtained by solvothermal reaction of MnO2 as a precursor in an organic alcohol solvent. By controlling the solvothermal temperature or the solvothermal time, the in-situ grown Mn3O4 forms the MnO2 / Mn3O4 heterojunction, the disorder structure generated in the lattice transformation process from MnO2 to Mn3O4 causes more oxygen vacancies to be formed on the interface, and the concentration of Mn 3+ is improved. The obtained MnO2 / Mn3O4 heterojunction material contains rich active sites (Mn 3+ and oxygen vacancies) for ozone adsorption and dissociation, has good catalytic activity, and can efficiently catalyze the degradation of organic pollutants in water by ozone.

The application discloses a preparation method of modified ion exchange resin and application thereof, and relates to the technical field of water treatment materials. Resin, EDC.HCl and L-arginine are proportionally immersed into a solution system with pH being 5 (the solution system with pH being 5 is obtained by adjusting 1% dilute hydrochloric acid), to obtain solution A, the solution A is heated to 35-45 DEG C and placed in a magnetic stirring pot, the stirring speed is set to 280-300 rpm, and the reaction is continuously carried out for 5-6 hours, to obtain resin B and residual liquid B, the resin B is washed with deionized water and anhydrous ethanol alternately for 5-6 times, until the filtrate is neutral; the resin B is placed in a vacuum drying box, the temperature is set to 55-60 DEG C, the vacuum degree is set to -0.09 MPa, and the drying is continuously carried out until the weight is constant, to obtain the modified ion exchange resin. The grafting of L-arginine increases more active sites of the resin, the nickel ions can be effectively combined with the resin, and the adsorption capacity of the resin for the nickel ions is improved.