30results about How to "Increased photodegradation rate" patented technology

The invention discloses a preparation method of a rutile phase titanium dioxide / graphene film, comprising the following steps: adding 20 ml of tetrabutyl titanate into 15 ml of absolute ethanol and stirring for 1 hour to form A solution; adding 1.8 ml of acetyl Add acetone and 2 ml of deionized water to 15 ml of absolute ethanol and mix and stir for 1 hour to form B solution; slowly inject B solution into A solution, stir at room temperature for 1 hour, and age in an oven at 60°C to obtain TiO 2 Sol; Spin-coat 4 layers of TiO on Cu substrate / graphene film layer 2 The sol was dried in an oven at 110°C for 15 minutes for each spin-coated layer, and then annealed in an Ar gas atmosphere with a flow rate of 200 sccm. The present invention uses a sol-gel method on a Cu substrate and a TiO 2 A graphene layer is inserted between the films, which effectively improves the TiO 2 Photocatalytic activity of thin films against methylene blue (MB) dye solution.

The invention discloses a preparation method of an 8-hydroxyquinoline iron organic dye photodegradation catalyst, and belongs to the field of metal-organic complexes. The method comprises the following steps: firstly, preparing a photodegradation catalyst reaction solution, dissolving ligands in N,N-dimethylformamide or methanol, dissolving an iron salt in methanol or N,N-dimethylformamide, mixingthe obtained two solutions, carrying out stirring at room temperature, heating the prepared reaction liquid to 60-80 DEG C for a reaction, slowly carrying out cooling to room temperature after the reaction is finished to obtain a brown black block crystal, then carrying out washing in methanol, and carrying out airing, so as to obtain the 8-hydroxyquinoline catalyst with catalytic activity. Themethod provided by the invention has simple operation, mild condition and low cost, and the efficiency is high when the catalyst is applied to organic dye photodegradation, so that the method providedby the invention has feasibility in industrial application.

The invention discloses a method for preparing bismuth-doped nano-titanium dioxide photocatalyst. The preparation steps are: 1) take tetrabutyl titanate and absolute ethanol into a beaker, stir evenly, and prepare A mixed solution; 2) take absolute ethanol , glacial acetic acid and deionized water into the beaker, stir evenly, weigh bismuth nitrate pentahydrate into the beaker, stir evenly; 3) under stirring, transfer the A mixed solution to the beaker and stir to prepare the B mixed solution; 4 ) Transfer the mixed solution of B to the reaction kettle, and place it at 60-70°C for 10 hours to form a sol-gel; 5) Take out the sol-gel and put it in a beaker, take polyethylene balls into the beaker and stir, then transfer to the reaction 6) Place the gel in a muffle furnace and calcinate it at 600°C in an oxygen environment to obtain a nano-titanium dioxide photocatalyst. The preparation method has simple steps, convenient operation, short time consumption, no pollution in the preparation process, and cheap and easy-to-obtain raw materials.

The invention discloses application of photocatalyst of TiO2 (titanium dioxide) loaded on a glass fiber fabric to treating microcystin. The glass fiber fabric serves as a catalyst carrier with a load of 0.8-1.2g / 200cm2, and the TiO2 loaded on the glass fiber fabric is of a P25 type. After the TiO2 is treated, hydroxyl radicals are obviously increased during photocatalysis, so that oxidative degradation of the microcystin by means of photocatalysis is improved. Besides, the TiO2 has high photocatalytic activity and is higher in reuse rate.

The invention relates to a preparation method of a vanadium and nitrogen co-doped titanium dioxide / activated carbon photocatalyst. The preparation method comprises the following steps: washing activated carbon which is dried and grinded and then adding into ethanol solution of titanate; stirring to form a titanium source, wherein the activated carbon and titanium dioxide are in the mass ratio of 1:(0.05-0.5), and the stirring time is 4 to 12 hours; adding citric acid and urea into the deionized water in sequence, and stirring to obtain a solution serving as a nitrogen source; adding oxalic acid and ammonium vanadate into the deionized water, and stirring to obtain a solution serving as a vanadium source; mixing the nitrogen source and the vanadium source to obtain an aqueous solution; dripping the aqueous solution into the titanium source dropwise; vigorously stirring, standing, ageing, drying and grinding, and roasting for 4 hours at 400 DEG C in a nitrogen atmosphere. According to the method, the process is simple; the prepared titanium dioxide photocatalyst is high in visible-light activity, high in degradation speed and low in cost.

The invention discloses a solid-gas interface Fenton reaction coupled carbon nitride photocatalytic material and preparation and application thereof. The surface of the photocatalytic material is grafted with hydroxyl groups, and ferrous ions or ferric ions or trivalent chromic ions capable of inducing the Fenton reaction are loaded. During preparation, melamine, alkali chloride and alkali containing alkali metal or alkaline-earth metal elements are adopted as raw materials, treatment is carried out in an electric furnace for a period of time at the temperature of 400 DEG C to 600 DEG C, the product is subjected to washing and suction filtration separation, the yellow carbon nitride photocatalytic material is obtained, and alkali chloride in washing liquid is recycled; the ferrous ions or the ferric ions or the trivalent chromic ions are loaded through a soaking method. According to the method, a catalyst forms a hydroxylated surface through a small amount of alkali, then a small number of ferrous ions or ferric ions or trivalent chromic ions are loaded through the soaking method, the modifying process is simple, easy to operate and low in cost, and the obtained product has excellent gas phase pollutant light degradation capacity.

The invention relates to the field of polymer materials, and specifically discloses a photodegradable polypropylene material, comprising the following raw materials in parts by weight: 100-120 parts of polypropylene resin, 0.1-1 part of a photodegradation agent, and the photodegradation agent is tungsten Iron acid. Ferric eleostearate contains three conjugated double bonds, and iron ions are used as photosensitizers. Ferric eleostearate can absorb most of the short-wavelength ultraviolet light and has outstanding absorption ability, so that eleostearate can absorb enough energy from light. After obtaining enough energy, ferric eleostate excites iron ions to form an excited state, and the excited state iron ions interact with polypropylene to promote polypropylene to generate a large number of free radicals, and the generated free radicals will promote the degradation rate of polypropylene. The excited state iron ions will return to the normal state of iron ions after promoting the generation of free radicals in polypropylene, and continue to cooperate with eleostearic acid to absorb ultraviolet light, and the cycle is carried out. The photodegradation rate of polypropylene is greatly improved.

The invention relates to a plastic waste degradation treatment agent and a preparation method thereof, belonging to the technical field of plastic waste treatment. In the present invention, polyhydroxy nanocellulose is firstly used as a raw material, mixed with sodium silicate, added with hydrochloric acid, reacted and filtered to obtain a filter residue, and then the filter residue is reacted at a high temperature to obtain a degradation agent matrix, and then the mussel mucin liquid and the degradation agent matrix are mixed After mixing, add catechol oxidase under alkaline conditions to obtain a modified degradation agent matrix, and finally mix and react the modified degradation agent base with ferric chloride and coal powder, filter, and dry to obtain a plastic waste degradation treatment agent ,with broadly application foreground.