35results about How to "Improved photocorrosion resistance" patented technology

The invention relates to a photocatalyst preparation method, in particular to a niobium nitride / cadmium sulfide composite nanoparticle photocatalyst preparation method and aims to solve problems of serious photocorrosion, poor stability, demand of precious metal promoters and low hydrogen production efficiency of cadmium sulfide photocatalysts prepared in the prior art. The method includes: firstly, preparing a niobium nitride precursor; secondly, preparing niobium nitride nanoparticles; thirdly, preparing a niobium nitride and cadmium salt solution; fourthly, adding a sulfur source into the niobium nitride and cadmium salt solution; fifthly, centrifugally separating and washing, and drying to obtain a niobium nitride / cadmium sulfide composite nanoparticle photocatalyst. After the niobium nitride / cadmium sulfide composite nanoparticle photocatalyst is illuminated for 4h, hydrogen yield reaches 409.6micromole per hour. By the preparation method, the niobium nitride / cadmium sulfide composite nanoparticle photocatalyst can be obtained.

A photocatalyst Pt-carried CdS / Ti-MCM-41 for generating H2 by optical catalytic reaction is prepared through providing CTAB as template agent, hydrothermal reaction to synthesize CTAB / Ti-MCM-41, ion exchange to obtain Cd / Ti-MCM-41, sulfurizing in HS gas to obtain CdS / Ti-MCM-41 and carrying Pt by optical reduction method. It has high H2 output rate.

The invention relates to a processing method of multifunctional coated fabric with hydrophobic and antibacterial functions. The processing method of the multifunctional coated fabric with hydrophobicand antibacterial functions comprises the steps as follows: 1) raw materials of an antibacterial coating are mixed and then stirred for 12-24 h, antibacterial coating slurry is obtained and uniformlyapplied to the surface of warp knit fabric, the warp knitted fabric is dried, and an antibacterial coating is formed on the surface of warp knitted fabric; b) raw materials except hydrophobic nanofiber for producing a hydrophobic coating are mixed and stirred at 50-80 DEG C for 1-3 h, and hydrophobic coating slurry is obtained, the stirred hydrophobic coating slurry is uniformly applied to the antibacterial coating obtained in step a, and warp knitted fabric with the hydrophobic coating is obtained; c) the hydrophobic nanofiber is planted on the surface of the hydrophobic coating obtained in step b with an electrostatic flocking method and the multifunctional coated fabric with hydrophobic and antibacterial functions is prepared.

The invention discloses a layered stromal HTiTaO5 / CdS Pt-carrying new-typed composite catalyst and making method, which comprises the following steps: mixing K2CO3, Ta2O5 and TiO2 at chemical gauge rate; sintering to obtain the KTiTaO5 product; proceeding KTiTaO5 to obtain catalyst layered stromal HTiTaO5 through nitric ion exchange; exchanging the stromal HTiTaO5 with saturated cadmium acetate ion through pile-supported propanamine; vulcanizing the exchanged stromal HTiTaO5 in the pipe-typed furnace hydrogen sulfide atmosphere at high temperature to produce HTiTaO5 / CdS; carrying Pt through photoreduction. The invention reaches the highest hydrogen-producing rate at 144umol / h and 6.3 percent quantum efficiency at 420 nm and 1.67 percent optical conversion efficiency for all-band of visible light, which improves the product activity.

The invention discloses a tent cloth with anti-ultraviolet function. The tent cloth is composed of warp knitted fabric and an anti-ultraviolet coating. The anti-ultraviolet coating is mainly prepared from PVC paste resin, an environment-friendly plasticizer, a stabilizer, filler, a flame retardant, a mildewproof agent, an antioxidant, an adhesive, anti-ultraviolet microspheres and the like, wherein the anti-ultraviolet microspheres are zinc oxide microspheres with a diameter of 0.01-0.1mm. The invention also discloses a processing method of the tent cloth with anti-ultraviolet function. The tent cloth prepared by the invention has good photocorrosion resistance, can reflect a lot of visible light, also can shield ultraviolet rays, and the use of hollow microsphere zinc oxide can play certain role in thermal insulation. The making method of the tent cloth is simple and quick, the effect is good, existing equipment can be used for preparation, and the industry reforming difficulty is small.

The invention relates to a method for suppressing photocorrosion of bismuth oxyhalide, which belongs to the technical field of photocatalytic materials. Pure bismuth oxyhalide will generate a passivation layer (Bi 2 o 3 ), severely hampered the expression of its photocatalytic performance. In the present invention, through in-situ photodeposition of cobalt nitrate, the generated cobalt oxide co-catalyst has an alloying effect with halogen atoms to form cobalt bismuth trioxide (BiCoO 3 ) alloy, which wraps bismuth oxyhalide, effectively inhibits its photocorrosion and improves its photocatalytic performance. The preparation method provided by the invention has cheap materials, simple process and controllable conditions, and the obtained bismuth cobalt trioxide (BiCoO 3 ) alloy can effectively improve the photoelectrochemical properties of bismuth oxyhalide, promote its charge separation, and improve its photocatalytic performance.

The invention discloses a Ni 2 P / Mn 0.3 Cd 0.7 S photocatalytic water splitting composite catalyst and its preparation method and application. The method comprises: uniformly mixing red phosphorus with a solvent, and grinding to obtain pretreated red phosphorus; 0.3 Cd 0.7 S catalyst is added to the ethanol solution to make Mn 0.3 Cd 0.7 The S catalyst is evenly dispersed to obtain a suspension; the NiCl 2 ·6H 2 O and pretreated red phosphorus are added to the suspension, subjected to solvothermal reaction, filtered, and dried to obtain the Ni 2 P / Mn 0.3 Cd 0.7 S photocatalytic water splitting composite catalyst. The composite photocatalyst provided by the invention has a rod-like structure, has a large aspect ratio, is beneficial to the transfer and separation of photogenerated carriers, can significantly improve the problem of serious photocorrosion of sulfide catalysts, and has a higher photocatalytic hydrogen production rate. In addition, the catalyst preparation method provided by the invention is simple to operate, and the preparation process is environmentally friendly and non-toxic.

The invention discloses a method for preparing Ag by using bovine bone, graphene oxide and silver nitrate 3 PO 4 The method of / GO / HAP composite photocatalyst uses phosphate in bovine bone as the phosphorus source of silver phosphate photocatalyst, which belongs to the field of high-value resource utilization of animal husbandry solid waste. It includes the following steps: breaking the bovine bone into small pieces, boiling it with deionized water for several hours and washing it several times until the grease and collagen are removed, and then putting it into a muffle furnace to pyrolyze it to obtain biomass calcium hydroxyphosphate, which is After ball milling, react with silver nitrate solution dispersed with graphene oxide in the dark under ultrasonic conditions, then wash, centrifuge, and vacuum dry to prepare Ag 3 PO 4 / GO / HAP composite photocatalyst. Biomass calcium hydroxyphosphate is made from bovine bone with a wide range of sources and low price. The prepared catalyst product has high photocatalytic activity in the visible light region, good photocatalytic stability and photocorrosion resistance, and can be used for degradation in industry, agriculture and life. The discharge of organic pollutants in wastewater has good economic and environmental benefits.

A process for preparing the Pt-carried cadmium sulfide as photocatalyst used to prepare H2 includes such steps as thermal decomposition of cadmium acetate at 300-600 deg.C to obtain cadmium oxide, thermal sulfurizing at 200-400 deg.C to obtain cadmium sulfide and carrying Pt by optical reduction method. Its advantages are high activity to generate H2 and high stability for resisting surface oxidization and optical corrosion.

The invention provides a waterproof and bacteriostatic canopy fabric and a processing method thereof. The canopy fabric consists of a warp-knitted fabric and a waterproof and bacteriostatic coating, wherein the waterproof and bacteriostatic coating is prepared from, by weight, 100 parts of PVC paste resin, 50-80 parts of environmentally friendly plasticizer, 15-20 parts of bamboo fibers, 0.5-2 parts of wasabi extract, 2-5 parts of stabilizer, 0-60 parts of packing, 0-20 parts of flame retardant, 0-5 parts of mildew preventive, 0-5 parts of antioxidant, 0-10 parts of adhesive and 40-70 parts of hydrophobic nano fibers. The added bamboo fibers are beneficial to increase of the strength and toughness of the canopy fabric, the wasabi extract and the bamboo fibers mainly play mildew-preventing and bacteriostatic functions through combined usage, and the waterproof and bacteriostatic properties of the canopy fabric are greatly improved by the waterproof and bacteriostatic coating.

The invention discloses Ni-doped Cd0.1Zn0.9 S microsphere photocatalyst and the preparation method thereof, the particle shape of the produced photocatalyst is a microsphere formed by nanometer crystals, and the doping amount of Ni is 0.1 percent to 0.5 percent of the weight of the catalyst. The invention has the preparation method that zinc sulfate, cadmium sulfate, nickel nitrate, and thioacetamide are taken as raw materials to form mixed solution which is sealed in a hydrothermal caldron and then laid in a baking oven to be insulated, naturally cooled to the room temperature, a resultant is obtained through cleaning, drying, and grinding. The Ni-doped Cd0.1Zn0.9S microsphere photocatalyst is prepared by the invention, and the anti-surface oxidation capability in air and the photo-corrosion resistant capability in the photocatalytic reaction are evenly enhanced greatly. Because the particle of the photocatalyst is microsphere-shaped, the photocatalytic activity for photocatalytic water splitting into hydrogen of visible light of the catalyst is greatly enhanced, and the highest hydrogen production rate reaches 191.01 micromole / (g*h). The quantum efficiency reaches 6.77 percent at the 420 nm position. After Pt of 0.6 wt percent is loaded, the highest hydrogen production rate reaches 585.45 micromole / (g*h), which is three times than the hydrogen production rate when the Pt is not loaded. The quantum efficiency reaches 15.9 percent at the 420 nm position, the activity is high, and the stability is good.

The invention discloses an advertising cloth with photocorrosion resistance. The advertising cloth is composed of a grid cloth, a PVC laminating layer and a photocorrosion resisting layer, wherein the PVC laminating layer is produced from PVC paste resin, an environmentally-friendly plasticizer, a stabilizer, a filler, a flame retardant, a mildew inhibitor, an antioxidant and an adhesive; and the photocorrosion resisting layer is composed of micro-nano zinc oxide fibers. The invention also discloses a processing method of the advertising cloth with photocorrosion resistance. The advertising cloth has good photocorrosion resistance, can reflect a large amount of visible lights, and also can shield ultraviolet rays; and the above production method of the advertising cloth has the advantages of simplicity, fastness, good effect, realization of production by using present devices, and small difficulty in industry reconstruction.

The invention provides a preparation method of a photocatalytic composite material, and relates to the technical field of catalysts. The preparation method comprises the following steps: (1) carryingout soaking pretreatment on plant leaves, thus obtaining template biomass; (2) mixing a molybdenum source-sulfur source water solution with the template biomass obtained in step (1), and immersing, thus obtaining a composite material precursor; (3) calcining the composite material precursor obtained in step (2), thus obtaining the photocatalytic composite material. The photocatalytic composite material is prepared from needle-like molybdenum sulfide and biomass carbon, wherein the needle-like molybdenum sulfide is loaded on the surface of the flaky biomass carbon; the content of the biomass carbon is 70 to 90 percent, and the content of the molybdenum sulfide is 10 to 30 percent. The photocatalytic hydrogen production performance of the photocatalytic composite material prepared by the invention is superior to that of a pure molybdenum sulfide material, excellent photocorrosion resistance is obtained, and the hydrogen production efficiency is just reduced by about 10 percent after circulating for thrice.