38results about How to "High catalytic degradation activity" patented technology

The invention discloses an anodization two-step preparation method of a cuprous oxide nanosheet powder material. The method comprises the following steps: anodization: using an ammonium chloride buffer solution as an electrolyte, regulating the pH value of the electrolyte to 4-10, and carrying out anodization reaction by using a copper foil as the anode and a graphite electrode or platinum electrode as the cathode; and foaming treatment: after the reaction finishes, cleaning the copper foil, drying, immersing the copper foil in a low-concentration oxydol solution, carrying out foaming reaction for 10-60 minutes, taking out, flushing, and drying to obtain the cuprous oxide nanosheet powder material which is attached to the copper foil substrate. The preparation technique disclosed by the invention is simple and easy to implement, has the advantages of low energy consumption, low cost and no pollution, is suitable for mass production, and has very important meanings for saving the energy sources and resources and improving the environment; and the prepared powder material has the advantages of large specific area and high catalytic activity, can be well attached to the substrate, and is convenient for recovery and reutilization.

The invention discloses an application of Ce(IO3)4, and provides an application example of the compound for the first time. As a catalyst, the Ce(IO3)4 can degrade organic dyestuff pollutants under a condition of completely lucifugal room temperature. The Ce(IO3)4 catalyzes and degrades the activity of Rhodamine B (RhB) and methyl orange (MO) dyestuff under a completely lucifugal condition, and is apparently superior to a commercial titanium dioxide (P25) photocatalyst under visible light irradiation. When the Ce(IO3)4 disclosed by the invention catalyzes and degrades dyestuff, illumination is not required; the activity is relatively high; the preparation method for the Ce(IO3)4 is simple; the preparation condition is mild; therefore, the Ce(IO3)4 is favorably popularized and applied.

The invention relates to a preparation method and application of a titanium-based nano-sheet composite catalyst. The preparation method comprises the following steps: taking tetrabutyl titanate as a titanium source and regulating and controlling hydrothermal synthesis conditions to prepare a TiO2 nano-sheet carrier capable of preferentially exposing a (001) crystal surface; loading manganese and cerium metal oxide active components to prepare the titanium-based nano-sheet composite catalyst. According to the catalyst prepared by the invention, the (001) crystal surface, which is preferentiallyexposed, of a TiO2 nano-sheet, and the manganese and cerium metal oxide active components have a strong mutual effect, and efficient catalytic oxidation on chlorinated aromatic hydrocarbon can be realized.

A SnS with S vacancies 2 The preparation of nanosheets and their application in photodegradation of Cr(VI) belong to the technical field of environmental protection and pollutant degradation. SnS obtained in step 1 2 The nanosheets were calcined at high temperature in a hydrogen / argon mixed gas, then cooled to room temperature, and the collected powder was SnS with S vacancies 2 Nanosheets. Photodegradation results reveal ultrathin SnS with abundant S vacancies within 1 h 2 The removal rate of the nanosheets for hexavalent chromium Cr(Ⅵ) reached 98%, which is much higher than that of SnS without S vacancies. 2 Nanosheets, the degradation rate is only 31%.

The invention relates to an ionic liquid regulation-control bio-enzyme, a method for degrading environmental hormone carbaryl by the same, and a method for determining the degradation rate. The ionic liquid regulation-control bio-enzyme comprises the mixed solution formed by adding chloroperoxidase, quaternary ammonium salt ionic liquids and H2O2 in a phosphate buffer solution with a pH value of 2-5, wherein in the mixed solution, the concentration of chloroperoxidase is 0.005-0.05mu mol.L<-1>, the concentration of ammonium salt ionic liquids is 0.06-0.20mol.L<-1>, and the concentration of H2O2 is 0.05-0.5mmol.L<-1>. According to the ionic liquid regulation-control bio-enzyme, the method for degrading environmental hormone carbaryl by the same, and the method for determining the degradation rate disclosed by the invention, the chloroperoxidase is used as a biocatalyst, the ammonium salt ionic liquids are used as regulation-control factors, the ammonium salt ionic liquids have a cosolvent effect on the chloroperoxidase, and can be used for improving the stability of the chloroperoxidase, increasing the enzyme catalysis speed and increasing the effective utilization rate of the chloroperoxidase; the ionic liquid regulation-control bio-enzyme is capable of effectively improving the solubility of carbaryl and increasing the degradation rate in case of being applied to degradation for carbaryl.

The invention discloses a method for preparing bowknot-shaped fluorine-oxygen-bismuth photocatalyst and an application of the catalyst. The method comprises the following steps that bismuth nitrate pentahydrate is added in water, the adding amount is 0.4g / 15mL to 0.5g / 15mL according to the volume of the water, stirring is conducted for 15 to 20 min, and stirring is conducted continuously for 5 to 15 min to form mixing solution; then the mixing solution is added into a linear made of teflon to conduct hydrothermal reaction; cooling is conducted after the reaction is finished, centrifugation is conducted, sediment is obtained, and the bowknot-shaped fluorine-oxygen-bismuth photocatalyst BI7F1105 is obtained by drying and washing. The method for preparing the bowknot-shaped fluorine-oxygen-bismuth photocatalyst has the advantages that the prepared bowknot-shaped fluorine-oxygen-bismuth photocatalyst can be existed stably, the form is good, the bowknot-like shape is not reported ever, and the ability of catalytic degradation on organic matters is higher than that of the normal TiO2 catalyst.

The invention relates to the field of environmental protection, and discloses a catalyst for degrading organic pollutants driven by a low-energy chemical field and an application thereof. The catalytic system of the invention can efficiently degrade various organic pollutants such as azo dyes and nitro compounds without providing external energy. The catalytic system uses formate as an auxiliary agent, and the catalytic material is mainly palladium, silver, gold, platinum, iridium, etc., which are loaded on the surface of the carrier oxide. When the root ion contacts with the transition noble metal interface, the C-H bond in the formate radical breaks to form active oxygen species. The active oxygen species include hydroxyl radicals, hydrogen peroxide radicals, carbonate radicals, etc., and the generated free radicals quickly absorb The organic matter is oxidized to naturally degradable small molecules, even non-toxic water, CO 2 Or carbonate, the organic pollutant degradation treatment method of the present invention has extremely high efficiency, low cost, and the catalytic system is stable and the recycling rate is high.

The present invention proposes a Z-mechanism Bi that is rich in oxygen vacancies 2 o 3 @CeO 2 A photocatalyst and its preparation method and application belong to the field of photocatalysis technology, and the method includes 1) preparing a reaction liquid; 2) preparing a catalyst precursor body liquid; 3) N 2 Preparation of Intermediate Bi@CeO by High Temperature Calcination in a Protected Tube Furnace 2 ; 4) Preparation of Z-mechanism Bi rich in oxygen vacancies 2 o 3 @CeO 2 Photocatalyst; the catalyst is nanosheet-like Bi 2 o 3 CeO attached to the curd 2 The curd structure formed on the particle, the oxygen-vacancy-rich Z-mechanism Bi prepared by the method of the present invention 2 o 3 @CeO 2 Photocatalysts can be applied to degrade NOx in the air under visible light conditions, which not only have high degradation rate and long activity retention time, but also the intermediate product NO 2 The yield is small, and the products formed by degradation are low or non-toxic, and will not cause secondary pollution to the air.