2010 results about "Catalyst support" patented technology

The invention relates to the technical field of catalyst carriers, and relates to a modified alpha-alumina carrier, a preparation method thereof, a supported silver catalyst and application. The modified alpha-alumina carrier is an alpha-alumina carrier with a silane coupling structure on the surface, and silane is at least one of silane compounds containing 1-3-Si-O-C-structures and containing vinyl or amino. Preferably, the silane compound is selected from at least one of vinylmethoxysilane, 3-aminopropyltriethoxysilane and methylvinyldimethoxysilane. According to the modified alpha-alumina carrier, the silane solution is adopted to treat the alpha-alumina carrier, silane contains a-Si-O-C-structure, the group can form a relatively stable structure on the surface of the carrier after hydrolysis or dehydration condensation, and influence is generated for a long time in the use process of a silver catalyst, so that the performance of the catalyst is improved.

The invention relates to a preparation method of silica gel microspheres used as a catalyst carrier, which comprises the following steps of: adjusting the speed of converting acidified water glass into gel by means of controlling material temperature and material concentration, multiple times of acidification and the like, so that the acidified water glass is atomized to form liquid drops, and then the liquid drops are quickly converted into the gel; and carrying out aging, acid washing, water washing, supercritical carbon dioxide drying, roasting in an atmosphere furnace and the like to prepare the silica gel microspheres with high specific surface area and large pore volume. Compared with the prior art, the specific surface area of the obtained silica gel can reach 250-450 m < 2 > / g, the pore volume can reach 1.5-3.0 cm < 3 > / g, and the silica gel has good strength and fluidity.

The invention discloses a large-aperture aluminum oxide loaded copper-based catalyst as well as preparation and application thereof. The large-aperture alumina-loaded copper-based catalyst comprises a large-aperture alumina carrier, and copper oxide and lanthanum oxide loaded on the surface of the large-aperture alumina carrier, the large-aperture alumina-loaded copper-based catalyst is granular, the specific surface area is 250-500 m < 2 > / g, the pore volume is 1.0-2.0 cm < 3 > / g, the average aperture is 16-30 nm, and the pore diameter of the large-aperture alumina-loaded copper-based catalyst is 20-30 nm. The large-aperture alumina supported copper-based catalyst comprises the following components in percentage by mass: 79%-98.9% of a large-aperture alumina carrier, 0.1%-6% of copper oxide and 1%-15% of lanthanum oxide. The large-aperture aluminum oxide loaded copper-based catalyst disclosed by the invention shows relatively high catalytic activity and higher alcohol selectivity in a reaction for preparing higher alcohol from ethanol, and particularly has relatively high C6-C10 fatty alcohol selectivity.

The invention relates to a titanium oxide nanowire supported iridium catalyst as well as a preparation method and application thereof. The catalyst comprises a titanium oxide nanowire carrier and elemental iridium supported on the titanium oxide nanowire carrier. According to the catalyst, the titanium oxide nanowire is used as a carrier, and the catalyst prepared by loading elemental iridium on the titanium oxide nanowire is used as an anode catalyst, so that higher mass specific activity and lower oxygen evolution overpotential can be obtained; the membrane electrode prepared by using the composite material has the characteristics of low noble metal catalyst loading capacity and low electrolytic water decomposition voltage.

The invention discloses a high-oxygen-storage zirconium solid solution material and a preparation method, and belongs to the technical field of rare earth catalytic materials, and the method comprises the following steps: precursor preparation, ultrasonic dispersion, double-gradient precipitation, ultrasonic aging, solid-liquid separation, three-section roasting and furnace cooling. Through the synergistic effect of double-gradient precipitation and ultrasonic aging, coarse grains and non-uniform particle size distribution are avoided, and the material is not prone to abnormal growth of the grains and structural collapse in long-term high-temperature service. Meanwhile, according to the gradient roasting process, through step-by-step regulation and control of crystal densification and crystal lattice reconstruction, separation of a fluorite phase and a pyrochlore phase easily occurring in traditional low-temperature single-section roasting is reduced, a stable crystal phase structure is maintained, it is ensured that the material can still keep sufficient active surface and pore channel structures under the working conditions of high temperature and thermal shock alternation, and the performance of the material is improved. The oxygen storage capacity and the long-term durability of the catalyst carrier are obviously improved.

The invention discloses a method for preparing activated carbon by using waste tire pyrolytic carbon black, which comprises the following steps of: selectively and dynamically screening and removing magnetic impurities, namely dynamically screening a pyrolytic product through an airflow grading device, separating out high-purity carbon black particles with the particle size of less than 10 microns, and removing metal impurities and residual steel wires by using a magnetic separation technology to obtain the activated carbon. And the purity of the carbon black reaches 95% or above. Therefore, the pore structure is optimized through combination of a wet method and high-temperature activation, the pore distribution is further maintained, regulated and controlled through freeze drying and solvent heat treatment, the specific surface area of the finally prepared activated carbon reaches 1500-2000 m < 2 > / g, and the pore volume retention rate reaches 90% or above; the technology not only effectively solves the problems of insufficient carbon black purity, unstable pore structure and high energy consumption in the prior art, but also remarkably improves the adsorption performance and chemical stability, so that the carbon black is widely applied to the fields of water treatment, gas adsorption, catalyst carriers and the like, and has the outstanding advantages of high efficiency, low consumption and environmental protection.

The invention relates to the technical field of catalyst materials, and particularly discloses a high-stability hydrogenation catalyst and a preparation method thereof. The invention relates to a preparation method of a high-stability hydrogenation catalyst, which comprises the following steps: preparing a hollow porous microsphere as an inner core from amino-terminated hyperbranched polyaryletherketone and polyvinyl alcohol, and then coating the porous microsphere with a mesoporous silicon dioxide intermediate layer by a sol-gel method; and finally, forming an Mg-Al hydrotalcite layer on the outermost side through a coprecipitation method, dipping and modifying with La (NO3) 3 and Ce (NO3) 3 solutions to obtain a catalyst carrier, dipping the catalyst carrier in an active metal dipping solution, and drying to obtain the catalyst. The high-stability hydrogenation catalyst provided by the invention has excellent mechanical properties and more reaction active sites, has high catalytic activity and catalytic efficiency, and is relatively long in catalytic life.

The present invention provides a method for preparing large-pore spherical alumina, and relates to the technical field of spherical alumina. The preparation method of the present invention comprises the following steps: mixing pseudo-boehmite powder with water to obtain a suspension, adding a peptizing agent for peptization to prepare an aluminum hydroxide sol; adding cross-linking molecules to the aluminum hydroxide sol to form a system to be cross-linked; adding a cross-linking agent to the system to be cross-linked to obtain a sol containing a prepolymer; and subjecting the sol to oil-ammonia column molding, drying and roasting to obtain large-pore spherical alumina. The present invention adopts an oil-ammonia column molding method, which does not require the addition of a pore-expanding agent or new equipment, and the preparation process is simple and does not introduce new impurities, so it is suitable for industrial production. The large-pore spherical alumina prepared by the present invention has a pore volume of up to 0.60cm 3 / g or more, and can be used as a propane dehydrogenation catalyst carrier.

The invention relates to the technical field of catalyst carriers, and discloses reticular porous spherical aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing an aluminum source, acid, a pore-forming agent, a surfactant and water to obtain pseudo sol; (2) performing ultrasonic treatment and oil ammonia column forming treatment on the pseudo sol obtained in the step (1) to obtain gamma-Al2O3 spherical gel beads; and (3) aging, washing, drying and calcining the gamma-Al2O3 spherical gel beads obtained in the step (2) to obtain the reticular porous spherical alumina. The spherical aluminum oxide prepared by the method has abundant communicated reticular pore channels, is obviously distributed in mesopore and macropore ranges, is beneficial to obviously improving dispersion and loading of a catalyst in an aluminum oxide carrier and improving the performance of petroleum reforming and propane dehydrogenation, and has industrial production utilization value and commercial value.

The invention relates to a self-heating catalysis propane partial oxidation reforming coupling tube type solid oxide fuel cell system and a preparation method of a catalyst and a carrier thereof. The system comprises a fuel cell tube and a honeycomb type catalyst carrier with the catalyst, the fuel cell tube comprises a cathode layer, an electrolyte tube and an anode layer; the anode layer is located on the inner wall of the electrolyte tube, and the cathode layer is located on the outer wall of the electrolyte tube; the honeycomb type catalyst carrier is mounted at a gas inlet end of a fuel cell tube and is communicated with an inner cavity of the fuel cell tube, the catalyst is a ruthenium-based active component, comprises RuO or metal Ru and is doped with CeO as a dispersing aid, the loading capacity of Ru is 0.5-5wt%, and the proportion of CeO is 0.5-3wt%. The method has the advantages that the mechanical stability is good, the influence of the anode reduction process on the starting time is eliminated, the influence of anode carbon deposition on the performance of the SOFC is reduced, and rapid heating and rapid power generation are realized.

The invention provides a preparation method and application of nitrogen-doped activated carbon for a ruthenium catalyst carrier, and the preparation method comprises the following steps: carrying out in-situ polymerization on aniline on the surface of nanocellulose by adopting an oxidative polymerization method to generate polyaniline, so as to obtain polyaniline-coated nanocellulose; the preparation method comprises the following steps: reacting phenol, an aminophenol derivative and a formaldehyde solution serving as raw materials under the action of a base catalyst to obtain modified A-stage phenolic resin; and uniformly mixing the polyaniline-coated nano cellulose with the modified resol, curing, crushing, carbonizing, activating, graphitizing, grinding and sieving to obtain the nitrogen-doped carrier activated carbon. The nanocellulose contains carbon, hydrogen and oxygen elements, gas can be generated in the preparation process of the activated carbon, and the pore structure of the activated carbon is expanded along with gas escape; a nitrogen-doped activated carbon pore wall is generated in situ by polyaniline around the occupation space of the nanocellulose, and the nitrogen element is beneficial to adjusting the size of active metal ruthenium particles and improving the activity and stability of the ammonia synthesis supported ruthenium catalyst prepared from the nitrogen-doped activated carbon pore wall.

The invention discloses a catalyst for catalytic synthesis of 2, 5-furandicarboxylic acid as well as a preparation method and application of the catalyst, and the preparation method of the catalyst comprises the following steps: (1) obtaining a molecular sieve modified by nitrogen species as a catalyst carrier; and (2) mixing transition metal salt with the molecular sieve modified by nitrogen species, and roasting at high temperature to obtain the transition metal oxide catalyst coated with the nitrogen modified molecular sieve. The 2, 5-furandicarboxylic acid is prepared by using 5-hydroxymethylfurfural as a raw material and using the catalyst for catalytic oxidation in a containing atmosphere, the method is simple to operate and mild in condition, the catalyst has high stability and good reusability, and the production process of the 2, 5-furandicarboxylic acid is economical and environment-friendly.

The invention discloses a carbon-based catalyst and a preparation method and application thereof to isomerization of glucose into fructose, the catalyst comprises an active component loaded on a carbon-based catalyst carrier and a chelating agent complexed with the active component, metal salts in the active component are Mg and K, the chelating agent is one or more of citric acid, triacetic acid, triethylamine ethylenediamine and potassium sodium tartrate. The chelating agent adjusts alkali active sites of a reaction system through acidic functional groups of the chelating agent, maintains an acid-base environment required by the reaction, and promotes an isomerization reaction from glucose to fructose. Meanwhile, the chelating agent and the metal ions form a stable complex to prevent metal salt from inactivation, and the metal ions are ensured to be uniformly distributed on the surface of the carrier and prevented from being agglomerated through the dispersity of the chelating agent, so that the activity and stability of the catalyst are improved. By controlling the dosage of the chelating agent and coordination of metal ions, the selectivity of the glucose isomerization reaction and the fructose yield are effectively improved, side reactions are inhibited, and the overall efficiency of the reaction is remarkably improved.

The invention discloses a preparation method and application of a catalytic wet oxidation catalyst containing rare earth metal, and belongs to the technical field of catalyst preparation and acrylic acid wastewater treatment. According to the present invention, with the method of self-propagating combustion after the metal precursor and the comburent are mixed, the high-stability porous high-entropy oxide as the catalyst carrier can be synthesized in one step, and the noble metal active component loaded heterogeneous catalyst can be further synthesized; the preparation method is simple, the yield is high, the thermal stability and chemical stability are good, the porous structure is rich, and meanwhile lattice distortion, structural defects and electronic effects caused by the unique high-entropy effect are achieved. When the catalyst prepared by the method provided by the invention is used for treating acrylic acid wastewater, the service life of the catalyst can be remarkably prolonged, and the degradation effect of organic matters in the wastewater is improved.

The invention relates to the technical field of catalyst recovery, and discloses a method for non-destructively recovering a waste catalyst carrier and noble metal. The present invention uses a noble metal leaching agent comprising an oxidizing agent, a ligand precursor, and water for recovering spent catalyst supports and noble metals. The method comprises the following steps: after roasting and reducing the waste catalyst, leaching the waste catalyst in the precious metal leaching agent, and carrying out first solid-liquid separation and washing to respectively obtain a waste catalyst carrier and precious metal. According to the method, a form of firstly reducing and then oxidizing is adopted, a compound leaching system is used for replacing a traditional leaching system based on hydrochloric acid, acid gas volatilization during leaching reaction is reduced, environmental pollution is reduced, and the operation environment is improved.

The production line comprises a preheating furnace, a tubular furnace and a cooling furnace which are connected in sequence, the preheating furnace comprises a first furnace body, a rack, a first feeding pipe, a first discharging pipe, a preheating device and a first driving mechanism, the first furnace body is rotationally connected to the rack, and the second furnace body is rotationally connected to the rack; the two ends of the first furnace body are rotationally connected with the first feeding pipe and the first discharging pipe correspondingly, a first preheating conveying blade is arranged in the first furnace body, a material guiding barrel is arranged in the first preheating conveying blade, a second preheating conveying blade is arranged on the inner side wall of the material guiding barrel, and the preheating device and the first driving mechanism are installed on the rack. The preheating device preheats the first furnace body, and the first driving mechanism drives the first furnace body to rotate. Compared with the prior art, the catalyst carrier has the advantages that preheating and drying can be performed during preparation of the activated carbon, carbonization and activation effects are improved, carbonization and activation processes in the production process of the activated carbon can be effectively controlled, and the catalyst carrier with large aperture and high specific gravity is obtained.

The invention belongs to the technical field of molecular sieve catalysts, and discloses a catalyst for preparing isobutene through acetone conversion and a preparation method and application thereof.The preparation method comprises the steps that firstly, an HBeta molecular sieve is treated with concentrated nitric acid to prepare a dealuminated Beta molecular sieve; then loading the hafnium oxychloride octahydrate in the dealuminated Beta molecular sieve by an impregnation method; putting the obtained sample into a tetraethylammonium hydroxide solution, and fully stirring; and drying, centrifuging, washing to be neutral, drying, and roasting to obtain the Hf / Beta catalyst. The catalyst shows excellent catalytic activity and selectivity in the reaction of preparing isobutene through acetone conversion, is good in stability, and can obtain high-efficiency isobutene yield; the catalyst carrier and the metal precursor salt are cheap and easy to obtain, and the preparation process is simple; therefore, a new effective way is provided for production of isobutene, and the situation that isobutene mainly depends on traditional energy at present is effectively relieved.

The invention belongs to the technical field of catalyst carriers, and particularly relates to a high-strength catalyst carrier and a preparation method thereof.The high-strength catalyst carrier is prepared from, by weight, 60-100 parts of molecular sieve raw powder, 40-80 parts of pseudo-boehmite and 15-30 parts of reinforcing adhesive; the reinforced adhesive comprises the following components in parts by weight: 10-20 parts of nano silicon dioxide slurry; 11 to 19 parts of modified graphene oxide; 3-5 parts of an anti-cracking agent; the nano silicon dioxide and the modified graphene oxide are used as reinforcing main bodies, the strength of the molecular sieve is effectively improved, the pseudo-boehmite colloid is uniformly coated on the surface of the molecular sieve to form a coating body, and the active state of the pore structure of the molecular sieve can be maintained.

The invention provides a silicon oxide loaded platinum-based high-entropy intermetallic compound catalyst for a propane catalytic dehydrogenation reaction. The catalyst is composed of a silicon oxide carrier and active metal nanoparticles loaded on silicon oxide. The preparation method of the catalyst comprises the following steps: fully drying a silicon oxide material to obtain a catalyst carrier; then, soluble metal salt is used as a precursor, and the heterogeneous catalyst is obtained through equivalent-volume impregnation, drying and reduction. A PtSn intermetallic compound is used as a substrate, the high-entropy intermetallic compound catalyst is prepared through a multi-metal doping strategy, the stability of the catalyst is greatly improved through a high-entropy structure, the electronic state of Pt can be adjusted through introduction of rare earth metal, desorption of propylene is promoted, the particle size of active components is reduced, and the catalytic activity of the catalyst is improved. The conversion rate and the stability of the catalyst are obviously improved. The catalyst shows good catalytic activity and selectivity at high temperature, shows excellent stability, and provides a novel high-activity and high-stability catalytic system for propylene preparation through propane dehydrogenation.

The invention discloses an electrically driven reactor based on a conductive heating integral honeycomb structure, which comprises a cylinder, an integral honeycomb structure heater capable of generating Joule heat under a power-on condition is arranged in the cylinder, the honeycomb structure heater is cylindrical, longitudinal fluid channels which are regularly arranged are formed in the honeycomb structure heater, and catalyst particles are filled in the channels; a thermal insulation material is filled between the outer wall of the honeycomb structure heater and the inner wall of the cylinder body; an upper sealing head and a lower sealing head are respectively arranged at the upper end and the lower end of the cylinder body; a gas distributor is arranged between the upper sealing head and the cylinder body, and a catalyst supporting plate is arranged between the lower sealing head and the cylinder body; a strip-shaped drainage conductor is arranged on the outer wall of the honeycomb structure heater and is led out of the reactor through a wire interface to be connected with an external power supply. The invention also discloses an application of the electrically driven reactor. The electrically-driven reactor is simple in structure, convenient to operate, energy-saving, environment-friendly and beneficial to popularization and application in production practice.

The invention provides a carbonyl sulfide hydrolysis catalyst and a preparation method thereof. The preparation method comprises the following steps: respectively preparing a K-containing alkaline solution and a samarium salt aqueous solution for later use; dipping the catalyst carrier in a K-containing alkaline solution, and then carrying out a first reaction under a certain condition to obtain a K-loaded catalyst precursor; immersing the catalyst precursor in a samarium salt aqueous solution for a second reaction, and further loading samarium; the carbonyl sulfide hydrolysis catalyst is prepared by the preparation method, and in the carbonyl sulfide hydrolysis catalyst, the mass fraction ratio of K to samarium is (8: 1)-(12: 1). The preparation method provided by the invention has the advantages that the raw materials are cheap and easy to obtain, the method is simple and easy to popularize, a large amount of organic solvents are prevented from being used in the preparation process, the method is more environment-friendly, and the prepared catalyst has the characteristics of higher activity, stronger stability and difficulty in poisoning when being used for catalytic hydrolysis of COS.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method and application of a humic acid-based carbon material supported bimetallic catalyst. The catalyst is prepared from 0.1 weight percent to 10 weight percent of Pt, 0.4 weight percent to 10 weight percent of second metal (Fe, Ni, Co or Mo) and 80 weight percent to 99.5 weight percent of a humic acid-based carbon material carrier. The preparation method comprises the following steps: grinding humic acid and an accelerant, roasting at high temperature to obtain a humic acid-based carbon material, and loading the second metal (Fe, Ni, Co or Mo) and Pt on the surface of the humic acid-based carbon material by a step-by-step impregnation loading method. The catalyst can efficiently catalyze hydrogenation of 5-hydroxymethylfurfural (5-HMF) in a tetrahydrofuran solvent to prepare 2, 5-dimethylfuran (2, 5-DMF). The humic acid-based carbon material is used as a carrier, the catalyst is simple in preparation process, low in cost and high in catalytic activity, efficient conversion of the biomass-based platform compound 5-HMF can be achieved under mild reaction conditions, and the catalyst has remarkable industrial application value.

The invention relates to a low-temperature sintered self-reinforced mullite whisker porous ceramic and a preparation method thereof. According to the preparation technology disclosed by the invention, the sintering temperature is successfully reduced while the toughening performance of the material is remarkably improved, which has an extremely important influence on reduction of the production cost and optimization of the material performance. The porous ceramic with an in-situ mullite whisker skeleton is prepared by combining an in-situ whisker generation method, a pore-forming agent adding method and a sintering aid method. The optimal synthesis process of the mullite ceramic is obtained by accurately regulating and controlling the raw material ratio, the sintering temperature and the pore-forming agent type. In addition, growth of mullite crystal nucleuses is promoted through the synergistic effect of the sintering aid and the whisker catalyst, and low-temperature sintering of the mullite ceramic is achieved. The invention aims to explore and realize an optimization method for low-temperature sintering, toughening and strengthening, so as to promote the development and application of the porous mullite ceramic in a plurality of application fields such as sound absorption, heat preservation, filtration and catalyst carriers.

The invention relates to the technical field of spherical catalyst carrier drying, in particular to a drying device and method for a spherical catalyst carrier after rolling forming, and the drying device is characterized in that a bearing mechanism is arranged in a drying oven, a material overturning mechanism is arranged in the drying oven and on the bearing mechanism, and a positioning mechanism is arranged on the drying oven; through cooperation of the bearing mechanism and the material turning mechanism, the spherical catalyst carrier in the material tray can be automatically and continuously turned in the drying process, and the spherical catalyst carrier originally wrapped in the material tray can be continuously turned to the surface layer, so that the spherical catalyst carrier is directly in contact with hot air flowing at a high speed in the drying oven; in addition, through the bearing mechanism, all layers of trays on the bearing frame can be independently lifted layer by layer, the heights of all layers of trays can be adjusted layer by layer, and therefore when the trays are taken and placed, it can be guaranteed that the taking and placing heights of the corresponding trays can be stably kept below the safe height all the time.

The invention provides a supported monatomic catalyst as well as a preparation method and application thereof, and the preparation method of the monatomic catalyst comprises the following steps: dipping a nano-porous metal oxide in a precursor solution of metal salt to obtain the metal salt supported on the nano-porous metal oxide; and carrying out heat treatment on the metal salt loaded on the nano-porous metal oxide, and decomposing to obtain the metal monatomic catalyst loaded on the nano-porous metal oxide. Metal salt loaded on the porous metal oxide is subjected to heat treatment, so that chemical bonds on the surfaces of metal atoms are not completely broken, the metal atoms are kept in a relatively isolated state to form single atoms, and meanwhile, the metal atoms are anchored through oxygen bonds on the surface of the nano porous metal oxide carrier; the metal single atom formed by the method is isolated by depending on the surface incompletely broken chemical bond and does not depend on the number of defect sites on the surface of the carrier, so that the metal single atom has relatively high loading capacity.

The invention relates to the field of catalysts, and discloses an alumina carrier composition, an alumina carrier and a preparation method and application thereof, the alumina carrier composition contains pseudo-boehmite and fluoride, and does not contain acid with a pKa value of-16 to 4. The preparation method of the alumina carrier provided by the invention comprises the following steps: 1) performing first molding on the alumina carrier composition provided by the first aspect of the invention to obtain a first product; and (2) carrying out second forming and roasting on the first product obtained in the step (1) and a forming aid. According to the alumina carrier provided by the invention, a large amount of NOx or hydrogen chloride and other atmospheric pollutants cannot be formed in the preparation process, the alumina carrier is more environment-friendly and safer, and the side pressure strength and the specific surface area of the catalyst carrier can be increased.

The invention relates to the technical field of catalysts, and discloses a preparation method and application of a catalyst for preparing olefin through carbon dioxide hydrogenation. The preparation method comprises the following steps: fully dipping graphite in a mixed solution of dodecane and hexadecane, and taking out to obtain a catalyst carrier; and loading the Fe element and the Mg element into the catalyst carrier by adopting a method of co-precipitating and then roasting to obtain the catalyst for preparing olefin by hydrogenation of carbon dioxide. The catalyst prepared by the preparation method has high stability when being used in a reaction for preparing olefin through hydrogenation of carbon dioxide, can maintain high catalytic activity after long-term use, and has high olefin selectivity at the same time.

The invention discloses an electrocatalyst for biomass conversion and plastic degradation as well as a preparation method and application of the electrocatalyst. According to the catalyst, a carbon-based material serves as a catalyst carrier, multi-component metal and multi-component metal oxide are loaded to prepare the catalyst of a binary metal interface structure, and the catalyst is recorded as NM / TMOx / C, NM is one or more of precious metal Au, Ag, Ir, In, Pd, Pt, Ru and Rh, TM is one or more of transition metal Co, Cu, Mn, Ni, Fe and Ti, the loading amount of NM is 0.5 wt%-35 wt%, and the loading amount of TM is 1 wt%-30 wt%; the invention also provides a preparation method and an application method of the catalyst. The catalyst NM / TMO / C is high in reaction rate of electrocatalytic oxidation of biomass and plastic degradation under low potential, high in selectivity of corresponding multi-electron products, good in CO toxicity resistance, good in stability and high in repeatability.

The invention belongs to a preparation method of a chemical intermediate, and particularly relates to a preparation method of dimethyl 1, 4-cyclohexanedicarboxylate, which comprises the following steps: carrying out hydrogenation reaction on dimethyl p-toluene in a solvent in a hydrogen atmosphere under the catalysis of a cerium dioxide loaded ruthenium monometal catalyst to obtain the dimethyl 1, 4-cyclohexanedicarboxylate, the invention discloses a method for preparing dimethyl 1, 4-cyclohexanedicarboxylate from dimethyl terephthalate through hydrogenation, which comprises the following steps: under the catalysis of a ruthenium-containing catalyst taking cerium dioxide as a carrier, carrying out hydrogenation reaction on dimethyl terephthalate in a solvent in a hydrogen atmosphere to obtain dimethyl 1, 4-cyclohexanedicarboxylate, and separating the dimethyl 1, 4-cyclohexanedicarboxylate from dimethyl terephthalate to obtain dimethyl 1, 4-cyclohexanedicarboxylate. And after the reaction is completed, the high-purity dimethyl 1, 4-cyclohexanedicarboxylate can be obtained only by filtering out the catalyst and concentrating to remove the solvent, and the operation is simple and convenient.

The invention relates to the field of novel environment-friendly composite materials, in particular to an attapulgite biochar graphite phase carbon nitride composite photocatalytic body as well as a preparation method and application thereof. Attapulgite, corn straw and dicyandiamide are blended, the mixture is subjected to high-temperature pyrolysis, and an attapulgite / biochar / graphite-phase carbon nitride composite photocatalytic system is constructed. The surface structure of attapulgite is modified by organic functional groups generated in the biomass pyrolysis process to prepare the attapulgite / biochar composite material with excellent Cr (VI) adsorption performance, the attapulgite / biochar composite material is used as a catalyst carrier, the dispersity of g-C3N4 on the surface of the carrier is increased by using the large specific surface area of the carrier, photocatalytic active sites are increased, and the photocatalytic activity of the catalyst is improved. The light response range of the g-C3N4 is widened, Cr (VI) is adsorbed, and Cr (VI) is subjected to in-situ visible light catalytic reduction under the visible light condition.