60results about How to "Wide absorption spectrum range" patented technology

The invention discloses a preparation method of bismuth oxyfluoride / graphene composite visible light catalyst. The main points of the technical scheme of the present invention are: configure Bi(NO 3 ) 3 ∙5H 2 The ethylene glycol solution of O and the ethylene glycol solution of NaF were mixed, and 100 mL of deionized water was added dropwise to obtain a white precipitate, which was dried by suction filtration and kept at 300°C for 2 hours to obtain spherical bismuth oxyfluoride with a particle size of 800 nm. Disperse graphene oxide in deionized water, add spherical bismuth oxyfluoride to the graphene oxide aqueous solution, add hydrazine hydrate, and reduce to polymer precipitation in a water bath at 80°C. The solution becomes clear. After the reaction, the solution is naturally cooled to room temperature and filtered. , washed with deionized water and ethanol three times respectively, and dried at 80°C in a constant temperature drying oven to prepare a bismuth oxyfluoride / graphene composite visible light catalyst. The bismuth oxyfluoride / graphene composite visible light catalyst prepared by the invention has the advantages of wide absorption spectrum range, stable performance, non-toxicity, high efficiency and low cost, and can be applied to the degradation of refractory organic pollutants.

The invention discloses a graphene-based bismuth tungstate composite photocatalyst and its preparation method and application. The invention uses bismuth nitrate pentahydrate, sodium tungstate dihydrate, glacial acetic acid and graphene oxide as raw materials, through low-temperature hydrothermal and hydrazine hydrate The flower-like bismuth tungstate nano-photocatalyst and graphene-based bismuth tungstate composite photocatalyst with three-dimensional structure were prepared by steps such as reduction. The preparation method of the invention is simple and easy to operate, low in cost, high in yield at low temperature, excellent in visible light activity, capable of large-scale production, and has strong applicability and broad market prospects.

An anti-blue light resin monomer and an anti-blue light resin material polymerized by the monomer, the monomer is composed of quinophthalone compound shown in formula A, nano-titanium dioxide with core-shell structure, ultraviolet absorber and optical resin monomer according to The weight ratio is (0.1-0.2): (0.5-3.0): (0.2-2.0): (100-150). The preparation method comprises: adding quinophthalone compound (formula A) solution, core-shell structure nano-titanium dioxide and ultraviolet absorber to the polymer monomer for preparing the optical resin and mixing. The anti-blue light resin monomer and the anti-blue light resin material of the present invention have the performance of distinguishing and absorbing blue light in different bands, so that the harmful blue light in the middle and short bands can maintain low transmittance, and the beneficial blue light in the long band and visible light in other bands can maintain high transmittance. , is beneficial to protect eyesight, and better solves the problem of damage to human eyes caused by ultraviolet light and blue light.

The invention provides a photocatalysis reduction method for CO2 in flue gas in an oxygen-enriched combustion power plant, which specifically comprises the following steps of: carrying out photocatalysis reduction reaction of CO2 in flue gas between the flue gas desulfurization and the CO2 compression in the oxygen-enriched combustion power plant, and collecting liquid products obtained by reduction reaction. The invention further provides a reduction device which comprises a reaction unit, a product collecting unit and a clapboard; the reaction unit comprises a reaction chamber, wherein two ends of the reaction chamber are respectively provided with a flue gas inlet and a flue gas outlet, the reaction chamber is internally provided with a plurality of baffle plates at intervals, gas channels are formed between the baffle plates and the wall of the reaction chamber, catalyst-loaded optical fiber bundles are fixed on the baffle plates, and the top end of the reaction chamber is provided with a quartz glass plate cover plate; and the product collecting unit comprises a collecting chamber arranged under the reaction chamber, the clapboard is arranged between the reaction chamber and the collecting chamber, and holes are arranged on the positions of the clapboard, which are in one-to-one corresponding to the optical fiber bundles. According to the invention, the CO2 emission reduction and the resource utilization can be realized, and the method and the device are higher in CO2 treatment capability, low in cost, free of pollution, and low in energy consumption.