42results about How to "Rich in active sites" patented technology

The invention belongs to the technical field of a nano titanium dioxide photocatalyst, and particularly relates to a copper and bismuth co-doped nano titanium dioxide photocatalyst and preparation and application thereof. In the photocatalyst, in molar fraction, the doping amount of copper is 0.2-3.0%, and the doping amount of titanium is 0.5-5.0%. The copper and bismuth co-doped nano titanium dioxide photocatalyst disclosed by the invention is in an anatase type, is used for the reaction for preparing methane, methanol, and the like by photocatalytic reduction CO2, has the advantages that the photon efficiency is high, specific surface area is large, and CO2 adsorption ability is strong, and simultaneously, has visual photocatalytic activity and high sunlight utilization rate.

The invention discloses an aluminum zirconium acid ester-doped titanium phosphate dual-component surface-modified ferric fluoride anode material and a preparation method. The method is characterized by comprising the following steps: loading aluminum zirconium acid ester, silicon / aluminium-doped titanium phosphate Li1.3Al0.1Ti1.9Si0.2P2.8O12, and a synthetic raw materials into a high-energy ball mill, ball-milling for a certain period, and performing heat treatment to obtain the FeF3 anode material. The aluminum zirconium acid ester is a bimetal coupling agent, has multiple active sites, and bonds with Li1.3Al0.1Ti1.9Si0.2P2.8O12 by hydrolysis of multiple alkoxyl groups into hydroxyl groups while having condensation polymerization with hydroxyl groups on the surface of the FeF3 anode material, and zirconium is an electron acceptor, can coordinate with fluorine ions on surfaces of FeF3 particles, therefore, under the action of the aluminum zirconium acid ester, doped titanium phosphate Li1.3Al0.1Ti1.9Si0.2P2.8O12 is bonded to the surfaces of the FeF3 anode particles with good contact between particles, and Li1.3Al0.1Ti1.9Si0.2P2.8O12 is a good lithium ion conductor, and the ionic conductivity of Li1.3Al0.1Ti1.9Si0.2P2.8O12 is 103-104 times of that of lithium cobalt oxide. Therefore, the defect that the FeF3 anode material has an extremely-low ionic conductivity can be overcome, and the electrochemical properties of the FeF3 material are improved.

The invention discloses a molybdenum diselenide / carbon nanotube array composite electrode, a preparation method and an application. Sodium molybdate, selenium powder and sodium borohydride are mixed according to a molar ratio of 1:3:1 and dissolved in deionized water. and anhydrous ethanol, then put the carbon nanotube array into the mixed solution, and conduct a hydrothermal reaction at 180-220°C for 36-48 hours to obtain a molybdenum diselenide / carbon nanotube array composite electrode; disselenide The molybdenum / carbon tube array composite electrode film is pressed on the current collector by pressure to obtain the supercapacitor electrode. In the present invention, molybdenum diselenide and carbon nanotube arrays are combined as an electrode material, and its specific surface area is greatly increased, and it has more abundant active sites, and these advantages enable its high theoretical specific capacity to be fully utilized. No binder is added when preparing the composite electrode, which not only reduces the weight of the entire electrode, but also makes the active component and the current collector directly and tightly combined, greatly reducing the contact resistance of the electrode.

The invention belongs to the field of the preparation of catalysts for stationary source tail gas denitration, and relates to the preparation of a catalyst by using a honeycomb metal carrier. Tabular and corrugated wire meshes attached with aluminum oxide coatings are stacked alternately and fixedly molded to form a catalyst carrier; a passage inside the carrier has a three-dimensional transparent structure. The preparation is characterized in that: the catalyst is prepared by loading the active components V2O5, WO3 and TiO2 on the surface of the catalyst carrier by a stepwise loading method;the mass sum of the V2O5, the WO3 and the TiO2 is 10-70 percent of the total weight of the aluminum oxide coatings and the V2O5, the WO3 and the TiO2; and the mass of V elements is 0.2-5.6 percent ofthe mass sum of the V2O5, the WO3 and the TiO2. The catalyst of the invention has low-temperature denitration activity and low-temperature sulfur and water resistant performance; and when the smoke temperature is 250 DEG C, the SO2 concentration is 600 ppm and the moisture content is 10%, the denitration efficiency of the catalyst is above 90%.

The invention discloses a foliar resistance control agent for suppressing cadmium pollution from atmospheric dust in wheat and a method for using the same, belonging to the technical field of environmental pollution control. 3 o 4 @C‑NH 2 0.2%, alkyl naphthalene sulfonate 1‑2%, lambda-cyhalothrin 0.5‑1%, water 91.8‑95.3%; spray the foliar inhibitor on wheat leaves during the filling stage of wheat, which can reduce The bioavailability of cadmium in the atmospheric dust adsorbed on the leaf surface directly cuts off the absorption of heavy metal cadmium in the atmospheric dust by the leaves, and then efficiently and significantly prevents the absorption of cadmium in the atmospheric dust and its transfer to the grain, reducing the cadmium content in the grain. It provides a new solution to control the cadmium pollution of wheat grains caused by cadmium in atmospheric dust.

The invention discloses a composite basalt fiber carrier material and a preparation method thereof. The carrier material comprises the following components in parts by weight: 95.0-99.9 parts of basalt and 0.1-5.0 parts of phosphate. Phosphorus is introduced in basalt fibers to increase active sites on the surfaces of the basalt fibers and reduce surface energy, so that microorganisms can be easily loaded on the basalt fibers, an adhesive force is large, the loading amount of the microorganisms is large, the purifying efficiency of a microorganism purifying material which takes the basalt fibers as a carrier is improved, and popularization and application of the basalt fiber material in water purification are promoted.

The invention discloses a cation S and anion N double-doped one-dimensional nanostructure TiO2 photocatalyst. The preparation method is as follows: (1) using a hydrothermal method, nano-TiO2 powder, TiO2 colloid or Ti(OH)4 and alkali The solution is made into a mixed suspension for hydrothermal reaction; (2) cooling, filtering out the precipitate, and washing to obtain white hydrotitanic acid; (3) preparing a mixed suspension with hydrotitanic acid, thiourea and solvent, stirring After ultrasonic treatment, drying to obtain a homogeneous mixture of hydrotitanic acid and thiourea; (4) calcining the homogeneous mixture of hydrotitanic acid and thiourea to obtain cation S and anion N double-doped one-dimensional nanostructure TiO2 photocatalyst. The catalyst of the invention has a one-dimensional structure and abundant active sites, which is beneficial to the improvement of the reaction activity. It can accelerate the mass transfer of pollutants to the catalytic material, thereby improving the photocatalytic efficiency; the special one-dimensional structure and non-metal double doping make it have excellent visible light catalytic activity.

The invention discloses a gear-shaped biodiesel catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a Ca / Al / La biodiesel catalyst with a pore structure from graphite phase-like carbon nitride (g-C3N4) as a template agent, that is, roasting melamine so as to prepare g-C3N4, dispersing CaCl2, Al(NO3).9H2O, La(NO3)3.6H2O and g-C3N4 in water, after dispersion, slowly dropping a NaOH into a mixed solution, performing continuous reaction for a certain time, performing reaction in an oven, performing suction filtration, drying, and roasting, thereby obtaining the Ca / Al / La biodiesel catalyst. The catalyst disclosed by the invention is relatively large in specific surface area, rich in active site and very high in catalysis activity and can be repeatedly used, and the use amount of the catalyst only accounts for 0.5-2% of the mass of biomass oil.

The invention discloses a non-metallic N-doped one-dimensional nanostructure TiO2 visible light catalyst, which is prepared by the following method: (1) adopting a hydrothermal method to prepare nano-TiO2 powder, TiO2 colloid or Ti(OH)4 with an alkali solution into a mixed suspension for hydrothermal reaction; (2) after the hydrothermal reaction is completed, cool, filter out the precipitate, and wash to obtain white hydrotitanic acid; (3) mix hydrotitanic acid, doped nitrogen source and water into a mixed suspension, ultrasonically treated after stirring, and dried to obtain a uniform mixture of hydrotitanic acid and doped nitrogen source; (4) calcining the homogeneous mixture of hydrotitanic acid and doped nitrogen source to obtain non-metallic N-doped one-dimensional nano Structure TiO2 Visible Light Catalyst. The catalyst of the present invention has a one-dimensional structure with rich active sites, which can accelerate the mass transfer of pollutants to the catalytic material, thereby improving the photocatalytic efficiency; the special one-dimensional structure and the doping of non-nitrogen metal make it have excellent visible light catalytic activity .

The invention discloses a preparation method of a double-quantum dot modified flower-like three-dimensional graphene and a photocatalytic material. Specifically, the method includes: preparing three-dimensional graphene on foam nickel; preparing an electrodeposition precursor solution containing Au; and preparing an Au@TiO2@3DGFs composite material by electrochemical deposition: putting a three-dimensional graphene into the precursor solution to serve as a working electrode for deposition of TiO2 and noble metal Au double quantum dots, thus forming flower-like three-dimensional graphene with Au and TiO2 double quantum dots evenly distributed on the surface in the electrochemical deposition process. The three-dimensional graphene electron-hole pair prepared by the method provided by the invention has the characteristics of low recombination rate, high photoelectrocatalytic activity, and high sunlight utilization.