35results about How to "Efficient oxidative degradation" patented technology

The invention provides a method for degrading azo dye by cooperatively activating PMS through Cl<-> and a CNT.The method comprises the steps that a certain amount of sodium chloride (NaCl), the carbon nano tube (CNT) and peroxymonosulfate (PMS) are added into a water body containing the azo dye (OG), the pH of a system is regulated to be and keeps within 2-10, reacting under continuous stirring is performed for 45 min at a certain revolving speed and certain temperature, and the azo dye (OG) is removed through oxidative degradation.According to the method, two mechanisms are related, that are, Cl<-> and PMS are subjected to a non-free-radical reaction to generate HOCl to oxidatively degrade the azo dye, the CNT activates PMS to generate a free radical reaction, a sulfate radical SO4<-> is generated to oxidatively degrade the azo dye, and the two mechanisms jointly act to achieve efficient degradation on the azo dye; the azo dye can be quickly and efficiently oxidatively degraded at normal temperature, the suitable pH range is wide, and the method is very suitable for treatment of industrial dye wastewater with the high salt content.

The invention discloses an OMS-2 catalytic material, a preparation method and application thereof. The preparation method comprises: calcining the solid mixture of manganese carbonate and additives at 300-500° C. for 1-5 hours, and then acid-treating the calcined solid mixture at 50-100° C. for 0.1-12 hours with an acid solution containing potassium salt, Obtain OMS‑2 catalytic material. The OMS-2 catalytic material prepared by the present invention has a single α-MnO 2 Crystal phase, higher than 100m 2 It has the advantages of specific surface area per g and increased pore volume; at the same time, the preparation method provided by the invention is simple to operate, the preparation route is green and environmentally friendly, the raw materials are cheap and easy to obtain, and the repeatability is good, which is convenient for large-scale production.

The invention discloses a CuO x Nanoclusters and their application as ozone catalysts. The CuO x Nano-clusters are mixed with aminated high specific surface area carrier and copper ion solution, then undergo a complexation reaction. After the reaction is completed, the reaction liquid is filtered to obtain a solid, which is washed and dried, and finally calcined at 300-500°C for 2- 8h, obtained after cooling. CuO of the present invention x The nanoclusters first functionalize the support with amino groups, form active riveting points on the surface of the support that are complexed with copper ions, and then perform a complex reaction with copper ions, thereby controllably integrating Cu 2+ Highly and uniformly dispersed on the surface of the carrier, CuO can be obtained after calcination x nanoclusters; the CuO x The preparation process of nanoclusters is simple and controllable, and the obtained CuO x Nanoclusters possess abundant dangling bonds (unsaturated coordination) and can be used as ozone catalysts to efficiently catalyze the oxidation of ozone to degrade organic pollutants.

The invention discloses a free radical controllable release defect coordination metal organic framework, a preparation method and an application. In the preparation method, when the ferrous ion is coordinated with the polycarboxylic acid organic ligand, a monocarboxylic acid is partially substituted for the polycarboxylic acid organic ligand to participate in the synthesis of the skeleton structure, and then the monocarboxylic acid is removed by washing and vacuum thermal activation to obtain defects. The metal-organic framework material with adjustable content of coordination-catalytically active iron centers realizes the controllable release of free radicals generated during catalytic activation of persulfate by regulating the exposure of defect-coordinated active sites. The invention prepares a high-proportion defect coordination metal organic framework material, and the content of defect coordination iron catalytic active centers can be adjusted. The synthesized metal-organic framework material is used as a catalyst for heterogeneous activation of persulfate, which can efficiently treat a variety of refractory organic wastewater. It has the advantages of simple synthesis steps, controllable release of free radicals, high catalytic activity, stability and recycling. Good sex and other advantages.