44results about How to "Efficient catalytic effect" patented technology

The invention discloses a preparation method and application of a supported metal catalyst. The supported metal catalyst comprises carrier framework materials and nano particles, loaded on the surfaces of the carrier framework materials, of metal or metal oxide, or metal ions chelated on the surfaces of the carrier framework materials, wherein the metal ions and nano particles of the metal or metal oxide are loaded on the surfaces of the carrier framework materials through the polymerization layers, adhered to the surfaces of the carrier framework materials, of catechol derivatives. The preparation method of the supported metal catalyst has the advantages that the method is simple, various carrier framework materials are used, one or more metal ions or nano particles can be loaded, and universality is achieved; the supported metal catalyst is good in active metal dispersity, large in carrier specific surface area, low in use amount, low in cost, and the like; the catalyst loaded with noble metal is catalyst material which is widely used and environmental friendly and is efficiently applicable to environmental chemical engineering fields such as dye wastewater decoloring, wastewater organic pollutant removing, car tail gas treatment, air purification, hydrogenation and reforming catalytic reaction, gas sensors and fuel cells.

The invention discloses a gold-MOFs-polymer composite membrane, and a production method and an application thereof, and belongs to the technical field of polymeric functional membranes. An MOFs-polymer composite membrane obtained through self assembling of a covalent bond driven NMOFs material and mercapto group-containing functional polysiloxane is adopted to load gold nano-particles as a matrix in order to obtain the gold-MOFs-polymer composite membrane material. The gold-MOFs-polymer composite membrane has a high catalysis effect on Knoevenagel condensation of 4-nitrobenzaldehyde at room temperature and reduction of 4-nitrophenol as a continuous flow-through membrane reactor. The composite membrane has great application prospect in the field of membrane catalysis.

The invention discloses a preparation method of polydivinylbenzene-ionic liquid-polyacid catalysts and an application thereof, and belongs to the technical field of catalyst preparation. Through polymerization reaction, an ionic liquid is loaded on polydivinylbenzene in a covalent combination manner, and then polyacid is combined with the ionic liquid in an electrostatic interaction effect to form a heterogeneous catalyst capable of efficiently catalyzing a long-chain fatty acid esterification reaction; and the potential application is to catalyze and prepare biodiesel. The catalyst has the advantages that an earlier stage processing is not needed before using, the catalyst can be used repeatedly, reaction containers are not corroded, and the catalytic activity is high and the like.

The invention discloses a compound photocatalyst and a preparing method and application thereof and belongs to the technical field of photocatalytic materials. Bombax ceiba serves as a biological template to prepare activated carbon fibers (ACFs), MoS2 and CoAl-LDH grow on the ACFs at the same time by the adoption of a hydrothermal method, and finally, the MoS2/CoAl-LDH/ACFs compound photocatalyst is obtained. The method is easy to operate, the technology is simple, the reaction condition is mild, and the obtained catalyst is novel and peculiar in morphology structure, and can effectively degrade organic pollutants in sewage under irradiation of simulated sunlight.

The invention relates to the process for preparing TiO2 photo-catalyst carrier on ceramic surface, wherein the compact ceramic carrier material is supported with TiO2 colloidal sol through sol-gal process, the TiO2 colloidal sol is prepared through dissolving butyl titanate or propyl titanate into acids, alcohols and water, washing and drying the finished ceramic carrier into TiO2 colloidal sol for 2-40 minutes, seasoning, sintering the carrying agent with carried colloidal sol in the furnace, elevating the temperature from room temperature to 80-250 deg. C, heat preserving for 10-80 minutes, elevating temperature again to 250-400 deg. C, heat preserving for 20-80 minutes, elevating the temperature to 450-550 deg. C, heat preserving for 40-90 minutes, furnace cooling to room temperature. A stabilized catalytic activity can be achieved by the invention.

The invention discloses a decolorization treatment method for colored liquid waste. A loaded metal catalyst and a reducing agent are adopted, colored liquid waste can be rapidly decolored, no loaded metal catalyst is consumed in the decolorization process, and continuous colored liquid waste decolorization treatment can be maintained just by adding the reducing agent. After the loaded metal catalyst is inactivated, organic solvent or water can be adopted to conduct washing to remove pollutants attached to the surface of the catalyst, the loaded metal catalyst can have activity again, and the color of the colored liquid waste is removed rapidly together with the reducing agent. The decolorization treatment method for the colored liquid waste is simple in process, all raw materials are low in price, the quantity of treated colored liquid waste is large, large-scale application is achieved easily, the loaded metal catalyst can be cycled for a long time, and decolorization treatment of colored liquid waste is greatly lowered.

The invention belongs to the technical field of medical materials, and relates to preparation of drugs for catalytic treatment of tumors, in particular to a hyaluronic acid modified FeCo bimetal synergistic monatomic catalyst as well as a preparation method and application of the hyaluronic acid modified FeCo bimetal synergistic monatomic catalyst. The hyaluronic acid modified FeCo bimetal synergistic monatomic catalyst is prepared by the following steps: firstly, synthesizing a FeCo bimetal synergistic monatomic catalyst; the FeCo bimetal synergistic monatomic catalyst can play a synergistic role, so that the catalytic efficiency is remarkably improved. By adopting the hyaluronic acid coated FeCo bimetal synergistic monatomic catalyst, the antitumor activity is remarkably improved and the toxicity to normal tissues is effectively avoided while the catalytic activity is not influenced and the water solubility is increased, so that the biomedical application of the FeCo bimetal synergistic monatomic catalyst is expanded, efficient catalytic tumor treatment is realized, great potential and prospects are realized in the aspect of tumor treatment application.

The invention provides a method for catalyzing green cyanation of halogenated aromatic hydrocarbons by a supported Pd complex and belongs to the technical field of chemical engineering and catalysis.According to the method disclosed by the invention, a series of supported Pd catalysts are synthesized, and applied to a reaction for catalyzing cyanation of halogenated aromatic hydrocarbons. The method disclosed by the invention has the advantages that the preparation method of the series of supported ligands is simple, the cost is low, the Pd complex can realize complete transformation of bromobenzene, and the catalyst can be recycled for three times. The cyanide source used in the reaction is non-toxic yellow prussiate of potash, the reaction can be completed in a methylbenzene-water two-phase catalytic system, use of a high-boiling-point high-polarity organic solvent is avoided, and the whole reaction system is green and environmental-friendly.

The invention provides a method for greenly and efficiently recovering copper ions, which comprises the following steps: adding an alkali solution into a copper solution to regulate pH to an alkali state; then adding a proper amount of hydrogen peroxide to perform a reaction; and washing and drying obtained precipitates to obtain a recovered product. The obtained recovered product nano flake copper oxide is an efficient Fenton-like catalyst and can be used for degradation of organic pollutants. Compared with a conventional copper ion recovery method, the method provided by the invention has the advantages that 1, complex equipment is not required, so that recovery cost is reduced; 2, in the recovery process, toxic and harmful byproducts cannot be generated, so that the method is green andhas no pollution; 3, a recovery rate is high, and the recovery rate reaches 99% under optimal conditions; and 4, the recovered product does not need to be processed again, the processing process of the recovered product is reduced, and the recovered product is the efficient Fenton-like catalyst and can be used for degradation of the organic pollutants.

The invention discloses a pH sensitive catalyst for catalyzing an asymmetric Aldol reaction and a preparation method thereof. The preparation method comprises the following steps: taking a polyacrylic acid derivative as a shell and a mesoporous silica nano-carrier as a core; and activating a carboxyl group in a polyacrylic acid derivative, carrying out amidation coupling reaction and other coating processes on the activated carboxyl group and an amino group on a mesoporous silica nano-material carrier to prepare a core-shell type organic-inorganic nano-material, and loading a chiral bipyridine/biaryl proline derivative on the core-shell type organic-inorganic nano-material to obtain the pH sensitive catalyst used for catalyzing the asymmetric Aldol reaction. The pH sensitive catalyst provided by the invention not only can solve the problem of poor dispersibility of Z on mesoporous surfaces and the like caused by easy aggregation of the mesoporous silica nano-carriers in a solution, but also can achieve an efficient catalytic effect by intelligently releasing the loaded active species Z in different pH environments in a catalytic process.

The invention provides a lithium-air battery positive electrode employing hydroxyl cobalt oxide as a catalyst. The positive electrode comprises a positive electrode base material and a positive electrode material coating coated on the positive electrode base material; the positive electrode material coating is prepared from the following components in percentage by mass: 5%-40% of hydroxyl cobalt oxide as a catalyst component, 50%-90% of a carbon material and the balance of an adhesive. The invention further provides a method for preparing the positive electrode of the lithium-air battery. The method comprises the following steps: mixing and grinding a formula amount of hydroxyl cobalt oxide and carbon material, and dissolving the adhesive into a solvent to obtain an adhesive solution; mixing the fully mixed and ground mixture and the adhesive solution to from uniformly dispersed slurry; and coating the positive electrode base material with the uniformly dispersed slurry, and carrying out drying and pressing to obtain a positive plate of the lithium-air battery. The discharge capacity of the lithium-air battery can be improved; battery polarization is reduced; and the cycle times of the battery are improved.

The invention provides a composite catalyst for aid-containing wastewater treatment. The composite catalyst consists of a catalyst A and a catalyst B, wherein the catalyst A is a ruthenium-based catalyst and comprises a carrier and an active component ruthenium which is supported by the carrier; the carrier is selected from one or more of a molecular sieve, aluminum oxide, titanium oxide and activated carbon; the catalyst B is an Mn-Co-Zn catalyst and comprises a carrier and active components Mn, Co and Zn supported by the carrier; and the carrier is a molecular sieve. Through compounding of the catalyst A and the catalyst B, the range of working temperatures can be widened, the catalysis effect can be ensured when the composite catalyst is applied to aid wastewater with a large concentration fluctuation range, the CODcr removal rate is 95% or greater, and the BOD5/CODcr is greater than 0.6 after treatment.

The invention provides a production method of copper-cone-shaped copper nicotinate micron materials. The copper nicotinate which is of a micron structure is produced by a one-step method, different shapes of micron structures can be obtained through control on the use of reactants, a quadrangle, a hexagon, an octagon and the like are formed along with different proportions of a reaction, the middle portion is hollow, the appearance is similar to a copper coin, and the particle parameter is within the range of 3 to 9 microns and the wall thickness is within the range of 1 to 5 micro nanometers through the representation of a scanning transmission electron microscopy. The copper-cone-shaped copper nicotinate micron materials can serve as a novel efficient recyclable catalyst so as to degrade the nitrophenol wastewater. The synthesis method is simple and easy to operate, the yield is high, the catalytic reaction is rapid, and the catalyst can be recycled.

The invention relates to a method for recycling heavy-metal-accumulated plants. The method is used for repairing plant tissues in heavy-metal-contaminated soil and treating NOx in the atmosphere by virtue of the plant tissues. The method comprises the steps of putting a heavy-metal-accumulated plant tissue sample into a corundum boat, putting the corundum boat into a tube type resistance furnace, ventilating nitrogen for 15 minutes, controlling the flow at 0.5Lmin<-1>, regulating and stabilizing the flow to be within 0.2-0.3Lmin<-1>, opening the resistance furnace, setting the required temperature to be 500-700 DEG C, starting timing after the resistance furnace is heated to the set temperature, carrying out heat treatment on the plant tissue sample for 6-8 hours, then continuously ventilating until the resistance furnace is cooled to the room temperature, taking out the sample, and grinding the sample. According to the method, the heavy-metal-accumulated plant tissues are prepared into a charcoal-base catalyst by virtue of a certain heat treatment technique, so that the quantities of hazardous wastes are substantially reduced, the subsequent transportation and backfill are facilitated, and the catalyst has an efficient catalytic effect on NO.

The invention discloses novel high-efficiency catalyst equipment for polyolefin. The novel high-efficiency catalyst equipment comprises a bottom plate and a reaction kettle, wherein the reaction kettle comprises a sealing box body, wherein a reaction space is arranged in the sealing box body; a feeding port is arranged at the upper side of the right end surface of the sealing box body; a rotary shaft in the vertical direction is arranged in the reaction space; a plurality of stirring blades are distributed circumferentially on a shaft body of the rotary shaft; a transmission box is arranged atthe upper side of the left end surface of the sealing box body; an energy conversion box is fixedly connected with the lower side of the left end surface of the sealing box body; an energy conversionpipe is spirally wound at the lower side of the columnar wall of the reaction space; a discharging pipe is arranged at the lower end of the right end surface of the sealing box body. The novel high-efficiency catalyst equipment disclosed by the invention has the advantages that in working, high-pressure steam blows pneumatic blades to rotate, so that the stirring blades are driven to rotate and stir liquid in the reaction space, further the contact of a catalyst and olefin monomer is more uniform, and the catalytic effect is more efficient; the heat produced by chemical reaction is recycled,so that the energy-saving and environment-friendly effects are facilitated.

The invention discloses a method for generating 2-acetyl-3-methylpyrazine with 2-ethyl-3-methylpyrazine as a raw material through oxidation. According to the method, the 2-ethyl-3-methylpyrazine and tert-butyl hydroperoxide serve as raw materials, and a catalyst and a ligand are added to serve as a catalyzing system; the 2-ethyl-3-methylpyrazine and the tert-butyl hydroperoxide react under the catalytic effect, and the 2-acetyl-3-methylpyrazine is obtained through one-step oxidation. The method has the advantages that the synthesis technology is economical and environmentally friendly, products such as water and tert butyl alcohol are free of pollution, reaction conditions are mild and simple, a large amount of toxic waste generated by a traditional technology is avoided, the selectivity for the 2-acetyl-3-methylpyrazine can reach 90% or above, and the method provides a new technology for preparing the 2-acetyl-3-methylpyrazine, and has broad industrial prospects.

The invention relates to a ferric alginate-sodium citrate gel material as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) preparing a sodium alginate aqueous solution and a mixed aqueous solution of FeSO4.7H2O and sodium citrate; 2) dropwise adding a sodium alginate aqueous solution into a mixed aqueous solution of FeSO4.7H2O and sodium citrate, and then conducting standing for reaction; and 3) after the reaction is finished, carrying out post-treatment to obtain the ferric alginate-sodium citrate gel material. During application, the gel material and hydrogen peroxide are added into phenol wastewater to degrade phenol. Compared with the prior art, the ferric alginate-sodium citrate gel material prepared by the invention has an efficient catalytic effect in phenol wastewater treatment, and the gel material is spherical, is easy to separate from pollutants, and can be recycled; and compared with a noble metal catalyst, raw materials such as sodium citrate are cheap and easy to obtain, and the preparation method is simple.

The invention provides a method for rapidly synthesizing poly (butylene succinate) or a copolymer thereof, which comprises the following steps: modifying solid nano silicon dioxide by using chlorosulfonic acid to obtain solid nano silicon dioxide grafted with sulfonic acid groups on the surface, and marking as a catalyst A; in the presence of the catalyst A, carrying out microwave treatment on polymerization monomers at 200-240 DEG C to carry out esterification reaction, wherein the polymerization monomers comprise butanediol and a binary acid, and the binary acid at least comprises succinic acid; after the esterification reaction is finished, adding a polymerization catalyst and an assistant B, wherein the assistant B is used for forming sulfonate with the sulfonic acid group of the catalyst A; vacuumizing and carrying out microwave treatment, and carrying out condensation polymerization at 220-260 DEG C to obtain the polybutylene succinate or the copolymer thereof. The method disclosed by the invention overcomes the problems that the molecular weight of the copolymer prepared by the traditional process is lower and the molecular weight is increased by using a toxic chain extender, and remarkably shortens the reaction time, so that the production of the poly (butylene succinate) and the copolymer thereof is more efficient and economic, and is more beneficial to industrialization.