19results about How to "Improve oxidation activity" patented technology

The invention discloses an electrochemical-catalyst dual-activated reactor for efficiently degrading azo dye by persulfate, which comprises: a reactor main body comprising a pretreatment chamber, a main reaction chamber and a post-treatment chamber which are mounted from bottom to top; the electrochemical unit comprises an anode, a cathode and a direct-current stabilized power supply, and the two ends of the direct-current stabilized power supply are electrochemically connected with the anode and the cathode; the catalyst unit is mounted at the bottom of the main reaction chamber; the liquid conveying system is used for sequentially conveying wastewater and a persulfate solution to the pretreatment chamber, the main reaction chamber and the post-treatment chamber, and the wastewater and the persulfate solution circularly flow in the chambers to finish pretreatment, degradation treatment and post-treatment; and the gas spraying system is used for uniformly inputting gas into the main reaction chamber. The reactor combines a dual activation mechanism of electrochemistry and a catalyst, generates active species with strong oxidizing property, remarkably improves the degradation effect of azo dyes, and has the advantages of high efficiency, simplicity and convenience in operation, wide applicability and the like.

The tooth whitening gel preparation machine is characterized in that the tooth whitening gel preparation machine comprises an activation reaction kettle, and the activation reaction kettle comprises an activation reaction kettle electrode driving plate unit, an activation reaction kettle electrode, a liquid inlet and outlet unit, a gas inlet and outlet unit and a liquid activation pool; the activation reaction kettle electrode driving plate unit is positioned at the upper part of the activation reaction kettle electrode; the liquid activation pool is positioned at the lower part of the activation reaction kettle electrode; and the liquid activation pool and the activation reaction kettle electrode form a closed cavity. The hydrogen peroxide liquid prepared by the invention not only has high oxidation activity, but also is mild, non-irritant and non-corrosive.

The invention provides a method for preparing hydrogen-rich low-carbon synthesis gas through chemical chain gasification of high-water-content biogas residues, and belongs to the technical field of solid waste treatment. The method comprises the following steps: mixing high-water-content biogas residues with an oxygen carrier, and carrying out chemical chain gasification reaction to obtain hydrogen-rich low-carbon synthesis gas; the moisture content of the biogas residues with high moisture content is 30-50%; the oxygen carrier is transition metal loaded lanthanum oxide. According to the method, the high-water-content biogas residues are subjected to chemical-looping gasification conversion by adopting the metal composite water carbon capture oxygen carrier material transition metal loaded lanthanum oxide, so that the water content tolerance of biogas residue chemical-looping gasification is improved, the quality of the synthesis gas is optimized, the hydrogen content in the synthesis gas is improved, and the CO2 content is reduced.

The invention belongs to the technical field of environmental functional materials, and discloses a sludge-based catalytic material as well as a preparation method and application thereof. The preparation method of the sludge-based catalytic material comprises the following steps: drying sludge to obtain sludge particles; mixing the sludge particles, EDTA (Ethylene Diamine Tetraacetic Acid), citric acid and water, and reacting to obtain modified sludge particles; mixing the modified sludge with a phosphomolybdic acid solution, and performing pyrolysis to obtain the sludge-based catalytic material. According to the invention, the EDTA and the citric acid are adopted to modify the sludge, metals in the sludge are distributed on the surface of the material in the subsequent pyrolysis process, and the citric acid also has a pore-forming effect to increase the specific surface area of the material and improve the adsorption capacity to pollutants; the sludge is modified by adopting phosphomolybdic acid, and abundant oxygen-containing functional groups are introduced to the surface of sludge carbon, so that the adsorption capacity and the catalytic degradation capacity of the sludge-based catalytic material are improved, and the sludge-based catalytic material has good catalytic performance.

The application discloses a method for degrading organic pollutants in water by using molybdenum disulfide activated potassium permanganate, which comprises sequentially adding molybdenum disulfide powder and potassium permanganate into water containing trace organic pollutants, treating for 10-90 minutes, and then removing unreacted potassium permanganate and molybdenum disulfide powder through coagulation, sedimentation and filtration in sequence; when the concentration of the trace organic pollutants in the water is 0.1-5 muM, the adding amount of the potassium permanganate is 50-300 mu mol / L, and the adding amount of the molybdenum disulfide is 25-150 mg / L; when the concentration of the trace organic pollutants in the water is greater than 5 muM, the adding amount of the potassium permanganate is 150-500 mol / L, the adding amount of the molybdenum disulfide is 50-200 mg / L, and the adding ratio of the molybdenum disulfide to the potassium permanganate is 1:(0.4-0.8). The method can enhance the degradation capacity of the potassium permanganate by adding the molybdenum disulfide, improve the removal rate of the organic pollutants, reduce the adding amount of the potassium permanganate agent, finally reduce the cost of water treatment, and effectively alleviate the chroma problem caused by a high adding amount of the potassium permanganate.

The application belongs to the technical field of catalysts, and particularly relates to an oxidation catalyst, a preparation method and application thereof, and a preparation method of propenal. The catalyst comprises an active component of general formula MoBi a Fe b X c Y d Z e Q f O j ·g NiMoO4; wherein X is at least one selected from Mg, Co, Ca, Cu, Zn and Mn; Y is at least one selected from Nb, Sb and W; Z is at least one selected from K, Rb, Na, Li and Cs; and Q is at least one of La, Ce and Sm. The catalyst is used in an olefin oxidation reaction, such as propylene oxidation to prepare propenal, and has the advantages of high total yield of propenal and propenoic acid, and good stability of the catalyst structure.

The present invention relates to a core-shell structured carbon-supported PtSn4 / Pt nanoparticle catalyst and a preparation method and application thereof. The present invention uses PtSn4 intermetallic compound nanoparticles as cores, adopts a two-step growth method to reduce and grow a Pt metal salt solution on PtSn4 nanoparticles, and grows Pt in an island structure on the surface of the PtSn4 nanoparticles serving as the core, thereby obtaining a core-shell structured PtSn4 / Pt nanomaterial, which is finally loaded on carbon black to obtain core-shell structured carbon-supported PtSn4 / Pt nanoparticles, which have excellent electrocatalytic ethanol oxidation performance and excellent CO poisoning resistance performance.

The application belongs to the technical field of automobile exhaust purification catalytic materials, and particularly relates to a kind of oxygen defect Pt (111 / 200) composite crystal face atomic level PtM supported rod-shaped La-Al2O3 catalytic materials and its preparation method and application, wherein the catalytic material includes carrier and its supported active ingredient, the carrier is rod-shaped La-Al2O3;Active ingredient is atomic level PtM composite material, Pt and M in it exist in the form of nano-particle, single atom, diatomic and few atom cluster;And Pt exists 111 and 200 composite crystal face;M includes at least one of Pd, Co, Mn and Cu;The carrier and / or active ingredient has oxygen defects.The catalyst improves the molecular activation capacity, low-temperature catalytic oxidation activity and anti-aging stability, and can improve the automobile exhaust catalytic oxidation treatment effect.

The invention discloses a graded multilayer water-resistant low-temperature rare-earth-based denitration catalytic fiber material and a preparation method and application thereof, the catalytic fiber material takes PAN fiber as a carrier and an MOF / MOF material formed by Ce-UiO-66 and ZIF-8 as an active component, and the surface of the active component is modified by pentafluorobenzene. According to the method, graded multi-layer synthesis of active components is controlled by adopting a special pore channel chip, pentafluorobenzene is taken as a surface modifier and an acid site enhancer, and the Ce-UiO-66 / ZIF-8-coated PAN catalytic fiber material is synthesized in one step by combining micro-fluidic electrostatic spinning with reaction self-heating. The catalyst synthesized by the method has a hierarchical multilayer MOF / MOF structure, is high in hydrophobicity and large in specific surface area, and can efficiently and stably realize the denitration target under the low-temperature flue gas working condition in the non-electric industry.

The invention relates to the technical field of contact material coatings, and particularly discloses a contact material surface coating and a treatment method thereof. The surface plating layer is obtained through sintering chemical plating and electroplating and comprises the following steps that (S01) sintering chemical plating is conducted, specifically, an alloy bar is taken to be pretreated, slurry is sprayed through a spray gun, then heat treatment is conducted in the argon protective gas environment, and standing is conducted overnight at the room temperature to obtain a first plating layer; and (S02) electroplating: placing the alloy bar subjected to sintering chemical plating in an electrolytic tank as a cathode, taking a silver sheet as an anode, and electroplating in a plating solution to obtain a second plating layer. The treatment slurry is prepared by mixing the following raw materials in parts by mass: 50-75 parts of a mixed solvent, 10-15 parts of magnesium diboride micro powder, 0.5-1 part of sodium silicate and 0.01-0.02 part of graphene oxide. The surface coating of the prepared contact material has good self-lubrication performance, and the arc oxidation behavior of a copper-tungsten contact can be inhibited.

The invention discloses a method for removing metal pollutants by advanced oxidation enhanced filtration, which comprises the following steps: mixing raw water to be treated containing manganese pollutants with peroxymonosulfate, carrying out ultraviolet radiation, and carrying out oxidation reaction to obtain an oxidized water body; the oxidized water body is filtered through quartz sand, manganese pollutants are removed through reaction, and the purified water body is obtained. By adopting a method of coupling peroxymonosulfate, ultraviolet radiation and quartz sand filtration, the originally mild peroxymonosulfate can be converted into a relatively active oxidation system, the efficient oxidation of the manganese pollutants is realized, the required treatment time is short, and the treatment cost is low. The deep removal of manganese pollutants in low-concentration raw water can be realized under the conditions that a complexing agent is not added, an expensive special adsorbent is not used and a complex filter material is not used.

The invention discloses a high-performance two-dimensional platinum-cerium cluster catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. According to the invention, (NH4) 2Ce (NO3) 6 and Pt (NO3) 2 are used as precursors, dihydrazine oxalate is used as a combustion improver, and the FC-Pt / CeO2 catalyst is synthesized by a solution combustion method. According to the present invention, the synthesized catalyst has the unique flat cluster structure, and is different from the traditional body cluster catalyst, the FC structure provides the wide reaction interface, such that the desorption of NH3 and the product thereof is promoted, and the NH3 oxidation activity of Pt on CeO2 is substantially improved; the method not only optimizes the low-temperature activation of NH3, but also effectively converts the generated nitrous oxide (N2O) into nitric oxide (NO), and further participates in enhancing the selective catalytic reduction process to generate N2, thereby improving the overall NH3 oxidation efficiency. Meanwhile, compared with the existing commercial catalyst, the catalyst has excellent water resistance.

The present invention proposes a microbial composition for enhancing sewage denitrification based on quorum sensing and its application, which belongs to the technical field of sewage biological treatment, and is composed of a quorum sensing bacterial composition that coexists with anaerobic ammonia oxidation, an adhesive and a biological carrier. Among them, the quorum sensing bacterial composition is composed of three quorum sensing bacteria, namely, Sinorhizobium CH9, Brucella CH10 and Burkholderia CH12. The microbial composition prepared by the present invention can continuously stabilize signal molecules, improve the denitrification efficiency of sewage treatment reactors, shorten the startup time of anaerobic ammonia oxidation reactors, and has broad application prospects in the field of sewage denitrification.

The present invention relates to a method for preparing formic acid by catalytic oxygen oxidation of carbohydrates in a separate manner of catalyst reduction and reoxidation. 40 Using H8PV5Mo7O as a catalyst, the carbohydrates are first selectively oxidized in water to produce formic acid with ultra-high yield, and the catalyst is reduced at the same time. Then, the reduced catalyst is regenerated with oxygen as an oxidant for the next round of carbohydrate oxidation. Compared with the traditional method of preparing formic acid, this method uses biomass carbohydrates as raw materials, avoids environmental pollution, and is sustainable; the reaction conditions are mild and the formic acid yield is high. 40 As a catalyst, it not only has high oxidation activity and good selectivity, but also has high reoxidation activity. Compared with the general method of preparing formic acid by catalytic oxygen oxidation of carbohydrates, this method can significantly improve the selectivity of formic acid and improve the carbon atom utilization rate of carbohydrates.

The application discloses a kind of cobalt molybdenum oxide nanosheet self-supporting electrocatalyst and its preparation method and application, it is related to electrocatalytic biomass conversion technical field.The catalyst with foam metal is conductive base, CoMoO4 Nanosheet is uniformly grown on its surface, and open pore network is formed by interweaving Nanosheet each other, and part is self-assembled into three-dimensional micron flower hierarchical structure.The application is realized by hydrothermal and reduction atmosphere heat treatment synergic control, and the integration self-supporting electrode construction is realized, and the obtained catalyst is rich in oxygen vacancy, and 5-hydroxymethylfurfural (HMF) can be electrocatalytically oxidized to prepare 2,5-furan dicarboxylic acid under extremely low driving potential, which shows excellent large current activity and high selectivity, significantly inhibits oxygen evolution competition reaction, and has long-term catalytic stability, and has wide industrialization prospect in biomass high value utilization.

The invention relates to the technical field of catalysts, in particular to a preparation method of an electric heating synergistic noble metal-perovskite catalyst, which comprises the following steps: S1, directly mixing samarium salt, cobalt or manganese salt and citric acid in a certain proportion with a small amount of deionized water, and stirring for a period of time to form sticky slurry to obtain a mixture; and S2, directly putting the mixture obtained in the S1 into a muffle furnace for calcining, heating to a certain temperature at a certain heating rate, and maintaining for a period of time to obtain the conductive cobalt-based or manganese-based perovskite, and S3, adding the cobalt-based or manganese-based perovskite obtained in the step S2 into a noble metal salt solution, stirring for 5-10 minutes, adding ethanol and 30% hydrogen peroxide, continuously stirring, filtering, drying and roasting to obtain the conductive noble metal-perovskite composite catalyst. The prepared catalyst has efficient catalytic activity under low voltage and low power, the efficient low-temperature purification capacity of VOCs is achieved, and the catalyst has good application prospects and economic benefits in the field of electric heating waste gas treatment.

The application discloses application of an orange bony fish bone antioxidant peptide in preparation of antioxidant products and belongs to the technical field of antioxidant active peptides.The amino acid sequence of the orange bony fish bone antioxidant peptide is shown as SEQ ID NO.3-14, the 12 polypeptides are proposed to have antioxidant activity for the first time, the ABTS activity and ORAC activity of the polypeptides are 1.70-4.29 times and 2.79-5.90 times of Trolox respectively.The polypeptides are proposed to activate the enzyme and non-enzyme antioxidant system in zebra fish by regulating the Keap1-Nrf2 pathway, so that the resistance of the body to oxidative stress is enhanced.The potential application of the orange bony fish bone antioxidant peptide in functional products has important significance.

The present invention relates to a sea cucumber active polypeptide and a preparation method and application thereof. The amino acid sequence of the sea cucumber active polypeptide is shown in SEQ ID NO: 1. The total protein is extracted by ammonium sulfate precipitation method, and then the sea cucumber polypeptide is obtained by enzymatic hydrolysis and gel chromatography separation and purification method. The separated and purified product is identified by high performance liquid phase technology, and is identified by mass spectrometry to prepare the sea cucumber active polypeptide. It is tested that the sea cucumber active polypeptide has good whitening, anti-wrinkle and anti-oxidation effects.

The invention discloses a high-activity, self-sodium-modified and self-crosslinked calcium bentonite-based barrier material as well as a preparation method and application thereof, and belongs to the technical field of geotechnical engineering materials. The calcium bentonite-based barrier material comprises the following raw materials: in-situ soil, calcium bentonite, sodium persulfate, ferrous sulfate, citric acid and carboxymethyl cellulose in a mass ratio of (80-90): (10-20): (2-4): (0.1-0.2): (0.02-0.04): (2-4). The calcium bentonite is directly used as a raw material, high activity, self-sodium modification and self-crosslinking effects can be realized, so that the anti-seepage performance is improved, a certain repairing and degrading effect is achieved, the whole preparation process is simple, direct and simple mixing is achieved, and complex processes such as high temperature and grinding are not needed.