67results about How to "Reduce photocatalysis" patented technology

The invention relates to a synthesis method of a supported silver iodide nanoparticle visible light photocatalyst, which comprises the following steps: adding 1g of Ag2WO4 nanorods into a prepared 25ml potassium iodide solution, stirring uniformly, standing in a dark room at room temperature for 1-24 hours, filtering to obtain a yellow precipitate, respectively washing with deionized water and anhydrous alcohol, and finally, carrying out vacuum drying to obtain the supported silver iodide nanoparticle visible light photocatalyst. The invention is very simple to operate: the silver tungstate nanorod are added into the prepared potassium iodide solution at room temperature, and the solution is kept for some time without adding various organic surface active agents, additives, templates and the like; since the whole reaction process only needs beakers and other common glass apparatuses, so the facility request is low; and the invention does not need various expensive processing and synthesizing facilities or high-temperature high-pressure reactors, and can easily implement mass synthesis.

The invention discloses a titanium dioxide composite material and a preparation method thereof, a photo-anode and an application of the photo-anode. The titanium dioxide composite material comprises a titanium dioxide carrier, cuprous sulfide and cadmium sulfide, wherein the cuprous sulfide and the cadmium sulfide are loaded on the surface of the titanium dioxide carrier. The preparation method comprises loading of the cadmium sulfide and loading of the cuprous sulfide. The preparation method disclosed by the invention has the advantages that the operation process is simple and the loading amount is easy to control; and the prepared titanium dioxide composite material has the advantages of being simple in preparation process, high in photoelectric conversion efficiency, fast in photoresponse, wide in photoresponse degree range, high in corrosion resistance and good in stability, and relatively high photo-generated current can be generated. The photo-anode disclosed by the invention comprises the titanium dioxide composite material, can be used for photoelectric catalysis cracking of water for hydrogen production, and has the advantages of being high in stability, long in service life, high in photoresponse degree, high in photo-generated current, high in photoelectric catalysis cracking capability on water and high in photoelectric conversion efficiency.

The invention discloses a preparation method of a nano-cellulose-induced titanium dioxide composite ultraviolet shielding material. The method comprises the following steps: adding 0.1-1 part by massof sodium lignin sulfonate into 5-15 parts by mass of 0.5-1.5% nano-cellulose suspension, stirring, adding 20-30 parts by mass of anhydrous ethanol, performing quick stirring for 3-8 minutes, performing heating to 70-90 DEG C, and keeping stirring for 25-35 minutes to obtain a nano cellulose template-induced reactant; adding 3-8 parts of butyl titanate into the reactant, performing stirring in thewhole dropwise adding process, and continuously performing stirring for 15-25 minutes after dropwise adding to form a mixed solution of a titanium dioxide precursor and the template-induced reactant;and slowly dropwise adding 1-5 parts of sulfuric acid solution with a mass concentration of 15-25% into the mixed solution, inducing lignin to be separated out to form lignin-coated suspension, and finally transferring the lignin-coated suspension into a reaction kettle for reaction to obtain a finished product. The ultraviolet shielding material prepared by the method is not easy to agglomerate,has good compatibility with various organic solvents, and has excellent ultraviolet resistance.

Antibacterial ABS resin includes, by weight, 100 parts of ABS and 0.2-0.4 parts of a composite antibacterial agent which is composed of the following components: zeolite powder, nano titanium dioxide, nano silver oxide and polyhexamethylene guanidine phosphate. The antibacterial ABS resin has the following advantages: 1) a titanium dioxide photocatalysis technology and silver ion sterilization are combined for inorganic sterilization, and as well as the polyhexamethylene guanidine phosphate which has strong sterilization effect, so that the sterilization effect is greatly improved due to combination of both inorganic and organic sterilization; and 2) with the zeolite powder as the carrier for supporting the nano titanium dioxide and the like, the nano titanium dioxide is free of caking, which reduces the effect of photocatalysis.

Provided are a self-cleaning coating, a self-cleaning fiber, a self-cleaning carpet and uses thereof. The self-cleaning coating is provided with a porous structure where pores communicate with one another; the volume of the pores comprised in the coating makes up 20%-98% of the total volume of the coating; and the pore diameter of the pores in the porous structure is between 0.5nm-50nm. The self-cleaning coating is mainly prepared from host materials; the host materials are one or more of titanium oxide, zirconia, titanium nitride, silicon oxide, tungsten oxide, g-C3N4 semiconducting polymer,perovskite semiconductor, silver, iron, gold, aluminum, copper, zinc, tin and platinum. The self-cleaning coating has a strong self-cleaning effect and can markedly prolong the service life of a corresponding product.

The invention relates to a preparation method of a cadmium sulfide self-doped titanium dioxide composite catalyst, which mainly solves the problems of insufficient light absorption and utilization rate and poor H2S photocatalytic decomposition activity of the traditional photocatalyst, and comprises the following steps that a mixed solution E is formed by mixing titanate, low-carbon alcohol, cadmium salt, water, a non-mandatory titanate hydrolysis inhibitor, an organic sulfur compound capable of being hydrolyzed to generate negative divalent sulfur and alkali metal borohydride. According to the technical scheme in which the mixed solution E is subjected to solvothermal reaction, the technical problem is better solved, and the preparation method can be used for production of the cadmium sulfide self-doped titanium dioxide composite photocatalyst.