A kind of molecular sieve supported type mno2-zno ozone catalyst and preparation method thereof

Abstract

The invention relates to a molecular sieve loaded MnO2-ZnO ozone catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing loaded MnO2 by virtue of an in-situ method, soaking a molecular sieve into Zn(NO3)2.6H2O in a certain mass ratio, slowly and dropwise adding a hexamine solution, uniformly mixing to obtain a solution, then transferring the solution into a polytetrafluoroethylene reaction kettle, reacting at 150 DEG C for 12 hours to obtain a product, and washing, filtering and drying the product, so as to obtain a molecular sieve loaded MnO2 nanorod; and carrying out in-situ hydro-thermal synthesis by taking the MnO2 nanorod loaded molecular sieve as a carrier and KMnO4 as a manganese source, namely mixing the carrier with KMnO4 in a certain proportion to obtain a mixture, reacting at 140 DEG C for 12 hours, washing, drying, and burning the mixture in a muffle furnace for 2 hours, so as to obtain molecular sieve loaded MnO2-ZnO ozone catalyst particles. According to the molecular sieve loaded MnO2-ZnO ozone catalyst, the utilization ratio of ozone is effectively increased, and the removal efficiency of COD is effectively improved.

Description

technical field [0001] The invention relates to a water pollution control material in the field of environmental purification and a preparation method thereof, in particular to a molecular sieve-loaded MnO 2 - ZnO ozone catalyst and preparation method thereof. Background technique [0002] The increasingly serious water pollution not only reduces the use function of water bodies, further exacerbates the contradiction of water shortage, but also seriously threatens the drinking water safety and health of urban residents. The advanced treatment methods commonly used at home and abroad include: flocculation precipitation method, ozone oxidation, reverse osmosis method, activated carbon method, demulsification, membrane separation method, biological denitrification, dephosphorization method, etc. These technologies have played a certain role in the removal of refractory organic matter, but there are also certain deficiencies, such as the difficulty in the treatment of reverse o...

AI Technical Summary

Problems solved by technology

Pd, Ru, Pt and other precious metal complexes are used as the catalytic active component of ozone. Although the catalytic activity is good, there are disadvantages such as high economic cost.

Now ozone catalytic oxidation, as an efficient, fast, and non-secondary pollution water treatment technology, has been applied in engineering applications in drinking water, printing and dyeing wastewater, tannery wastewater and other related fields, and has also received more and more attention in the research field. , but the ozone catalytic oxidation technology has not yet been widely promoted and applied in the advanced treatment of industrial wastewater. The main reason is that the preparation of an efficient ozone catalyst is the core and difficult problem of the ozone catalytic oxidation technology.