299 results about "Biomass carbon" patented technology

The invention discloses a lycium ruthenicum biomass carbon dot as well as a preparation method and application thereof. The novel lycium ruthenicum carbon dots are prepared by taking lycium ruthenicum as a raw material and adopting a one-step hydrothermal method, and the novel lycium ruthenicum carbon dots are used for detecting residual herbicides in soil without being interfered by other substances. The method for detecting the herbicide residues in the soil by adopting the prepared novel carbon dots is superior to a large instrument, the detection method has the advantages of simplicity in operation, low cost, high sensitivity and the like, the source of the lycium ruthenicum is wide, and the preparation process is green and environment-friendly. Therefore, the prepared carbon dots provide a new method for detection of the fine phosphinate ammonium salt, and a thought and a method are provided for specific application in agricultural production.

The invention discloses a biomass-based hard carbon composite material quantitatively prepared based on a hard carbon pore volume and a method thereof, a negative electrode material and a battery. The method provided by the invention comprises the following steps: firstly, uniformly dispersing a pore-forming agent in biomass powder, pre-carbonizing, and washing to obtain a porous carbon matrix; according to the steps, pore forming is completed while pre-carbonization is completed, the porous carbon matrix with a certain pore volume is prepared, the dosage of the soft carbon precursor is designed based on the total pore volume in the subsequent steps, quantification and rationalization of the dosage of the soft carbon precursor can be achieved, the obtained product is good in performance consistency, and industrial production can be achieved. And the problem that subsequent soft carbon raw materials cannot be scientifically matched due to diversity of raw materials of biomass with different sources can also be avoided. Besides, by utilizing the chemical cross-linking reaction of asphalt and biomass carbon, not only is the carbon residue rate improved, but also a unique structure rich in closed pores and ultra-micropores is constructed, and the problems of low initial coulombic efficiency and insufficient platform capacity of traditional hard carbon are effectively solved.

The invention discloses a preparation method and application of a biomass-based hard carbon negative electrode material based on a microwave solvothermal method, and the preparation method comprises the following steps: fully mixing a pretreated biomass carbon source with a sulfuric acid solution, transferring into a microwave hydrothermal reaction kettle, and carrying out microwave hydrothermal treatment to obtain a hydrothermal reaction product; carrying out solid-liquid separation on a hydrothermal reaction product, collecting filter residues, cleaning until filtrate is neutral, and drying to obtain a hard carbon precursor; performing high-temperature carbonization on the hard carbon precursor under the protection of an inert atmosphere to obtain the biomass-based hard carbon negative electrode material; according to the method, a mixed system of the biomass carbon source and sulfuric acid is pre-carbonized in a microwave solvothermal mode, uniform deliming of the biomass carbon source is achieved under the controllable acidity condition, and the uniformity of the biomass carbon source is improved; the pre-carbonized biomass material is subjected to high-temperature carbonization in an inert atmosphere, so that a hard carbon material with a moderate extension interlayer spacing can be obtained, and the synergistic improvement of high-rate charge-discharge performance and long cycle stability is realized.

The invention relates to the technical field of heavy metal contaminated soil remediation, in particular to a plant-microorganism-passivator synergistic remediation method for a heavy metal contaminated farmland, which comprises the following steps: step 1, constructing a soil digital twinborn model; step 2, intelligent decision making and verification of a collaborative restoration scheme; 3, soil pretreatment before remediation; step 4, hierarchical collaborative restoration and dynamic regulation and control; 5, performing long-term verification on the repair effect and performing model iteration; physical heat treatment is used as strengthening pretreatment, the occurrence form of heavy metal is changed through high temperature, biomass charcoal is generated in situ, passivation immobilization-microbial strengthening-plant extraction three-stage collaborative operation is carried out according to the time sequence, pollutants are rapidly locked through a passivating agent, rhizosphere immobilization is strengthened through functional microorganisms, plant growth is promoted, and the quality of plants is improved. And the hyperaccumulator finally removes the heavy metals from the soil, so that the unification of short-term control and long-term reduction is realized.

The invention relates to the field of lithium ion batteries, in particular to a biomass carbon / silicon / conducting polymer ternary composite negative electrode material with a hierarchical pore structure and a preparation method and application thereof. According to the material, active nano silicon is effectively limited by utilizing natural graded pore channels of biomass, and a conductive polymer layer with elastic strain buffering capability is prepared by combining a low-temperature in-situ polymerization process. According to the structure, biomass carbon pores are filled with the conductive polymer layer, the specific surface area of the material can be reduced, interface side reaction can be inhibited, and therefore the first coulombic efficiency and cycling stability of the material are improved.

The invention discloses a biomass carbon loaded manganese dioxide catalyst as well as a preparation method and application thereof. The biomass carbon loaded manganese dioxide catalyst comprises a carrier and MnO2 loaded on the surface of the carrier, and the carrier is carbonized biomass obtained by performing alkali treatment and hydrogen peroxide treatment on biomass and then carbonizing the biomass in an inert atmosphere. The supported catalyst prepared by the method has proper valence and morphology, a MnO2 mixed phase appears, more oxygen vacancies are generated, generation of free radicals in the activation process of peroxymonosulfate (PMS) is facilitated, PMS can be effectively activated to remove organic pollutants, and the activation efficiency of MnO2 on PMS and the operation stability of MnO2 in a packed column are greatly improved. Compared with a traditional method for adjusting the oxygen vacancy of MnO2, the method for loading the biochar is relatively controllable, simple in mode and low in cost.

The invention discloses a low-cost high-first-effect micron silicon negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: treating the surface of micron silicon by adopting an oxidant solution to form a silicon dioxide passivation layer, and then carrying out surface modification by using a silane coupling agent; the method comprises the following steps: performing acid-base alternate soaking treatment on a biomass carbon source to reduce the content of metal impurities; mixing the delimed biomass carbon source, the composite carbon source and the pretreated micron silicon, firstly adding a weak acid catalyst for hydrothermal reaction to form a hard carbon inner layer, then adding a weak base catalyst for regulating the pH value of the system to alkalescence in batches, and continuing hydrothermal reaction to form a soft carbon outer layer; and washing and drying the product, and carrying out carbonization treatment in an inert atmosphere to obtain the composite coated micron silicon material. The first efficiency of the material is greater than or equal to 92%, the 1C 1000-time circulation capacity retention ratio is greater than or equal to 82%, the raw material cost is low, the process is simple, and the material is suitable for lithium ion batteries in the fields of power, energy storage and consumer electronics.

The invention relates to a chromium-targeted adsorbing material as well as a preparation method and application thereof. The preparation method of the targeted chromium adsorption material comprises the following steps: S1, crushing, sieving and pyrolyzing stems of potassium-rich plants to obtain biomass carbon; s2, dispersing biomass carbon in a solvent, adding Cr < 6 + > template ions, Cr < 3 + > template ions, a functional monomer, a cross-linking agent and an initiator for reaction, and washing and drying after reaction to obtain an ion imprinted polymer; and S3, dissolving a reduction barrier agent in a solvent, adding the ion imprinted polymer, and reacting at room temperature to obtain the chromium-targeted adsorption material, the potassium-rich plants are plants with the total potassium mass content of 5%-8%. The long-acting reduction adsorption material for targeted remediation of heavy metal Cr < 6 + > / Cr < 3 + > polluted soil and underground water is prepared, has extremely high specific selectivity and efficient adsorbability, and has obvious advantages in the aspects of heavy metal treatment efficiency, continuity and acid interference resistance.

The invention belongs to the technical field of methyl red azo dye purification, and discloses a methyl red azo dye adsorbent with good adsorption performance on a methyl red azo dye adsorbent, and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a first precursor solution and a second precursor solution; the first precursor solution contains melamine, and the second precursor solution contains cyanuric acid and / or barbituric acid; (2) sequentially adding the first precursor solution and the second precursor solution into biomass carbon powder to form a reaction solution; enabling the supermolecule aggregate to grow in situ and coat the surface of the biomass carbon powder under a stirring condition to form a solid-liquid mixture; removing the solvent in the solid-liquid mixture, and drying to obtain a supramolecular composite precursor; (3) carrying out pressure molding on a mixture of the supramolecular composite precursor, silicate clay mineral and nickel salt to obtain a green body; and (4) carrying out heat treatment on the green body to obtain the methyl red azo dye adsorbent.

The invention relates to a system and a process for preparing an efficient carbon-based fertilizer by carbonizing agricultural and forestry biomass, which are applied to the technical field of carbon-based fertilizer preparation, and the system comprises a raw material pretreatment unit, a biomass granulation unit, a biomass carbonization unit, a biomass charcoal activation unit, a finished product post-treatment unit and a volatilization inhibition composite unit, the volatilization-inhibiting composite unit comprises a mixed base preparation module and a wrapping volatilization-inhibiting module; the wrapping volatilization-inhibiting module comprises a rotary drum granulator, a base material feeder, a nitrogen source feeder, a humidity adjusting mechanism and a granulation control module; based on the design of the volatilization-inhibiting composite unit, a graded volatilization-preventing granulation strategy of firstly preparing a nitrogen-free core and then wrapping a nitrogen fertilizer is adopted, so that direct and large-area contact between high-pH-value biochar and volatile nitrogen source components in the granulation process is thoroughly isolated from physical space and time sequence; therefore, generation and dissipation of a large amount of ammonia gas are avoided from the source, and the utilization efficiency of the fertilizer is remarkably improved.

The invention discloses a preparation method and application of a double-biomass carbon source coated ammonium polyphosphate intumescent flame retardant with a core-shell structure. Ammonium polyphosphate is used as a core, composite coating of chitosan and zinc stannate is achieved through an ion exchange reaction and a chelation reaction, then a lignin shell layer is introduced through a Mannich reaction, and the lignin and chitosan double-carbon-source coated intumescent flame-retardant antibacterial synergist is obtained. The flame retardant disclosed by the invention is simple and convenient in preparation process and high in safety, most of the raw materials are derived from green renewable biomass materials with low cost, and the flame retardant has environment-friendly characteristic and excellent polymer compatibility. The microcapsule surface modification technology enhances the interfacial interaction between the additive and the polymer matrix, systematic optimization of the flame retardant property of the composite material is realized, and when the flame retardant is used for modifying the TPU material, the molten drop phenomenon and a large amount of dense smoke generated in the combustion process can be effectively inhibited, and the TPU composite material can be endowed with excellent long-acting antibacterial property.

The invention relates to a uniform carbon-coated mesoporous silicon carbon negative electrode material and a preparation method and application thereof.The preparation method comprises the steps that a product obtained after pyrolysis and carbonization of a biomass carbon source is subjected to alkali activation treatment, acid pickling, drying, smashing, passivation, water washing and drying are conducted to obtain a mesoporous carbon matrix, nanometer silicon particles are deposited in pores of the mesoporous carbon matrix, and the uniform carbon-coated mesoporous silicon carbon negative electrode material is obtained. Then selecting a low-temperature carbonization material and polyethylene glycol to perform pre-carbonization and complete carbonization treatment on the mesoporous silicon carbon material to obtain a carbon coating layer, and finally obtaining the uniform carbon-coated mesoporous silicon carbon negative electrode material. When the uniform carbon-coated mesoporous silicon carbon negative electrode material is applied to a lithium battery, the mesoporous skeleton can effectively inhibit volume expansion of silicon in a battery circulation process, and the uniform carbon-coated layer can effectively reduce the risk of direct contact between the negative electrode material and an electrolyte, so that a stable SE I film is formed to reduce the occurrence of side reactions; and the first coulombic efficiency and the cycle performance of the battery are further improved.

The invention provides a metal-doped biomass carbon negative electrode material and a preparation method thereof.The preparation method comprises the steps that an acid activating agent is added into biomass powder for soaking, then a pore inducer is added for high-temperature activating treatment, and activated porous carbon is obtained; preparing a mixed metal salt solution, adding the activated porous carbon into the mixed metal salt solution, sequentially stirring and standing, and performing suction filtration and drying to obtain an intermediate; and putting the intermediate into a vapor deposition reaction cavity, heating under the protection of nitrogen, introducing a silicon source gas and a germanium source gas for a deposition reaction, and cooling after the deposition reaction is completed to obtain the metal-doped biomass carbon negative electrode material. According to the process, through collaborative integration of structural design and element functions, the comprehensive electrochemical performance of the metal-doped biomass carbon negative electrode material is remarkably improved, and the problem that a traditional doped material is insufficient in stability and capacity utilization rate is solved.

The application relates to the technical field of soil remediation, and particularly discloses a composite soil remediation agent, a preparation method and application thereof.A composite soil remediation agent comprises modified calcined oyster shell, plant biomass carbon, bone charcoal, compost, microbial preparation and ferrous sulfide; the preparation of the modified calcined oyster shell comprises the following steps: crushing, calcining oyster shell, and then adding a modified solution prepared from urea, rhamnolipid, iminodisuccinic acid tetrasodium and sodium dodecylbenzenesulfonate to modify the calcined oyster shell, so that the modified calcined oyster shell is obtained.The composite soil remediation agent can effectively adsorb and fix heavy metals in slightly heavy metal contaminated soil, reduce the mobility and bioavailability of the heavy metals, and thus reduce the harm of the heavy metals to soil and crops.

The invention relates to the technical field of adsorption materials, in particular to a high-performance seaweed carbon fiber material based on microsphere phase change and a preparation method of the high-performance seaweed carbon fiber material. The method comprises the following steps: carrying out component separation on a seaweed raw material to construct a core-shell structure microsphere phase change unit which takes calcium alginate microspheres as a shell and seaweed active polysaccharide as a phase change medium, introducing sulfonic cellulose nanocrystals and polyacrylonitrile to be blended to prepare a composite spinning solution, dispersing the microsphere phase change unit into the composite spinning solution, and preparing the composite spinning solution. After electrostatic spinning, catalytic carbonization and water vapor activation, the seaweed carbon fiber material is finally prepared, a sulfonic acid group effectively catalyzes a polyacrylonitrile cyclization reaction in the carbonization process, the compactness of a carbon skeleton is remarkably enhanced, and the sulfonic acid group and a microsphere phase change unit generate a multi-stage synergistic enhancement effect, so that the material has ultrahigh strength and high adsorbability at the same time; the technical problem that the mechanical property and the adsorption property of the biomass carbon fiber are difficult to consider at the same time is solved.

The invention discloses a tomato peel biomass carbon-based wave-absorbing material as well as a preparation method and application thereof, and belongs to the technical field of wave-absorbing materials, the preparation method sequentially comprises the following steps: drying and grinding, pre-carbonizing, activating and activating and carbonizing; in the step of drying and grinding, the tomato peel residues are dried, ground and sieved, and tomato peel residue powder is obtained; the pre-carbonization comprises the step of carrying out pre-carbonization treatment on the tomato peel residue powder to obtain a pre-carbonized material; mixing the activated and pre-carbonized material with KOH powder, stirring, centrifugally washing and drying to obtain an activated pre-carbonized material; in the step of activation and carbonization, the activated pre-carbonized material is subjected to activation and carbonization treatment, and the tomato peel biomass carbon-based wave-absorbing material is obtained. The prepared tomato peel biomass carbon-based wave-absorbing material is low in cost, good in wave-absorbing performance, free of pollution in the preparation process and diverse in pore form.

The invention discloses a modified activated carbon adsorption material with carboxyl functionalization and grading holes and a preparation method of the modified activated carbon adsorption material, and belongs to the technical field of adsorption materials. A biomass carbon raw material is subjected to hydrothermal carbonization and then mixed with KOH for activation, a solid-phase material is collected, dried and then mixed with HNO3, the mixture is heated in a water bath, the modified activated carbon adsorption material with carboxyl functionalization and graded pores is obtained, introduction of oxygen-containing functional groups and coordinated regulation of a pore structure are achieved, and the adsorption efficiency is improved. A hierarchical pore channel system and a polar surface are formed, so that the physical adsorption and chemical fixation capabilities of the modified activated carbon material on formaldehyde molecules are greatly improved. The specific surface area of the modified activated carbon adsorption material provided by the invention can reach 1454.8 m < 2 > / g, and the pore volume can reach 0.86 cm < 3 > / g; under a dynamic condition, an efficient adsorption state can be kept for a long time, and the saturated adsorption capacity can reach 650mu g / g.

The invention discloses a preparation method of high-performance porous carbon. The preparation method comprises the following steps: raw material pretreatment, activator mixing, slurry drying, heat treatment and post-treatment. Biomass carbon waste is selected as a carbon source, resource utilization of the waste is achieved, the production cost is reduced, environmental problems caused by waste incineration or landfill are reduced, a green activating agent composed of sodium citrate and monopotassium phosphate is adopted to replace a traditional high-corrosivity activating agent, and the environment-friendly effect is achieved. The preparation method has the advantages that equipment corrosion and environmental pollution are avoided, the subsequent washing process is simple, a strong corrosive reagent is not needed, the operation risk and cost are reduced, carbonization and activation can be synchronously completed through one-step heat treatment, the process steps are simplified, the preparation period is shortened, and meanwhile, the energy consumption is reduced by optimizing the heating rate and the heat treatment temperature.

The invention provides a preparation method of a carbon-coated hard carbon material used as a sodium ion battery negative electrode material. The preparation method comprises the following steps: S1, pre-carbonizing a biomass base material for 1-5 hours under the condition of 300-600 DEG C, and crushing the obtained substance to obtain a biomass charcoal material; s2, uniformly mixing the biomass charcoal material obtained in the step S1 with asphalt according to a mass ratio of 1: (0.01-0.15) to obtain a hard carbon precursor; and S3, carrying out carbonization and heat preservation on the hard carbon precursor obtained in S2 in inert gas at 1000-1400 DEG C for 1-5 hours, then cooling to 30-200 DEG C, and screening to obtain the carbon-coated hard carbon material. According to the carbon-coated hard carbon material, the surface of the biomass charcoal material prepared from a biomass base material is coated with a layer of asphalt in situ, and the carbon-coated hard carbon material is prepared by taking the asphalt as a precursor through a high-temperature carbonization one-step method, so that the specific surface area and the micropore proportion of the material can be effectively improved; and relatively high reversible capacity and first-circle coulombic efficiency are obtained in a low-cost and high-production-efficiency manner.

The invention provides Cr (VI) ion imprinted biomass carbon aerogel microspheres and a preparation method and application thereof.The preparation method comprises the steps that a bubble-rich mixed solution of gelatin, chitosan, glacial acetic acid, sodium bicarbonate and lauryl sodium sulfate is dripped into alkali liquor, and Cr (VI) ion imprinted biomass hydrogel microspheres are obtained through a surface ion imprinting technology; and carrying out freeze drying and high-temperature carbonization to prepare the Cr (VI) ion imprinted biomass carbon aerogel microspheres. The inner part of the large-hole interconnected thin-wall structure is of a three-dimensional interpenetrating network structure. When the pH value is equal to 2, the Cr (VI) ion imprinting biomass carbon aerogel microsphere has a Cr (VI) ion removal rate of 99% or above, has a wide pH working range, and has a Cr (VI) ion removal rate of 70% or above when the pH value is equal to 1-5. In the presence of interfering ions, the selectivity coefficient K value of the Cr (VI) ion imprinted biomass carbon aerogel microspheres to Cr (VI) ions is far greater than 1, and the Cr (VI) ion imprinted biomass carbon aerogel microspheres have a relatively large relative selectivity coefficient K'value, and still show the highest adsorption capacity to the Cr (VI) ions in the coexistence of various heavy metal ions.

The invention provides a medium-entropy doped sodium ion battery positive electrode material and a preparation method and application, the medium-entropy doped sodium ion battery positive electrode material comprises a matrix and a carbon coating layer on the surface of the matrix, the chemical formula of the matrix is Na4Fe3-x-y-zMnxMgyCuz (PO4) 2P2O7, 0.05 < = x < = 0.15, 0.01 < = y < = 0.05, 0.01 < = z < = 0.05, and the carbon coating layer is derived from a biomass carbon source. According to the medium-entropy-doped sodium ion battery positive electrode material, Mn, Mg and Cu with specific contents are doped, so that the iron redox reversibility can be enhanced, the charge transfer resistance can be reduced, the sodium ion diffusion coefficient can be improved, the band gap and the sodium ion migration barrier can be reduced, the lattice volume change can be reduced, and the crystal structure can be stabilized; meanwhile, by coating the carbon coating layer derived from the biomass carbon source, the conductivity of the material can be improved, and the cost is reduced.

The invention discloses a nano zero-valent iron core-shell composite material regulated and controlled by solid-state phase change of oxygen-containing groups as well as a preparation method and application of the nano zero-valent iron core-shell composite material, and belongs to the field of treatment of new pollutants in organic wastewater. The method comprises the following steps: co-dissolving biomass carbon, a metal iron source and an oxygen-containing functional group additive in deionized water, carrying out stirring reaction at room temperature, and then centrifugally collecting precipitate; carrying out vacuum drying on the obtained precipitate to obtain an iron-based precursor; under an inert atmosphere, roasting the iron-based precursor to 600-900 DEG C at a heating rate of 2-10 DEG C / min, and keeping the temperature for 2-4 hours to obtain black magnetic powder; and stirring and etching the black magnetic powder in an acid solution with the pH value of 1-3 for 1-2 hours, and drying to obtain the nano zero-valent iron-based material with the core-shell structure.

The invention relates to the technical field of sodium ion battery manufacturing, in particular to a preparation method for applying a bamboo asphalt-based composite material to a sodium ion battery, which comprises the following steps: (1) dissolving citric acid in deionized water to prepare a citric acid solution; (2) uniformly mixing bamboo powder with asphalt; (3) pouring ethanol and a citric acid solution into the asphalt and bamboo powder mixture, and magnetically stirring; (4) drying the mixture, and performing primary carbonization; (5) further performing secondary carbonization on the sample; and finally collecting the sample. The influence of different carbonization temperatures and pre-oxidation steps on the hard carbon material is discussed, the asphalt and the biomass carbon material are mixed to prepare the hard carbon material, the cycling stability of the material is improved, meanwhile, the yield is increased, and the cost is reduced.

The invention provides a traditional Chinese medicine residue resource utilization process which comprises the following steps: collecting traditional Chinese medicine residues, classifying and storing the traditional Chinese medicine residues, chopping and drying the traditional Chinese medicine residues, and evaporating water to complete pretreatment of the traditional Chinese medicine residues; the pretreated traditional Chinese medicine residues are subjected to biomass gasification treatment in a biomass gasification treatment mode; combustible gas generated in the biomass treatment process is completely combusted by a gas generator to generate heat and electric energy; the residues obtained after biomass gasification treatment are subjected to carbonization treatment, and the residues achieve the effect of biomass carbon. The traditional Chinese medicine residues are subjected to chopping and drying pretreatment and then subjected to biomass treatment, so that combustible mixed gas containing hydrogen, carbon monoxide, methane and the like is generated from the traditional Chinese medicine residues, the gas can form new energy to serve as boiler production power, zero emission of production waste is achieved, pollution to the environment is reduced, the residues are subjected to carbonization treatment, and the production cost is reduced. And the residue reaches the effect of biomass carbon, so that resource recycling is realized, and the method is economical and practical.

The invention relates to a biomass low-temperature carbonization accelerant as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out water washing pretreatment on powder obtained by crushing a biomass raw material, and then carbonizing in an inert atmosphere to obtain biomass carbon powder; acidizing the biomass carbon powder to obtain carbon-based solid acid; the carbon-based solid acid and a transition metal salt auxiliary agent are mixed and ground, and the biomass low-temperature carbonization accelerant is prepared. The biomass low-temperature carbonization accelerant is a composite catalyst composed of carbon-based solid acid and transition metal salt; wherein the carbon-based solid acid is used as a main catalytic substrate, provides abundant Bronsted acid loci-SO3H, and is mainly used for catalyzing the dehydration reaction of biomass; transition metal ions are used as Lewis acid sites and generate a synergistic effect with the carbon-based solid acid to jointly catalyze depolymerization, dehydrogenation and aromatization reactions, so that deep carbonization can be initiated and completed at a relatively low temperature of 250-400 DEG C, and the carbonization rate is remarkably higher than that of an existing carbonization catalyst.

The invention provides a catalyst for preparing aviation fuel oil through synergistic conversion of a biomass liquefaction light component and a coking diesel oil light component and a preparation method of the catalyst. According to the catalyst, multi-metal phosphate ZrHfTaP is used as a carrier, transition metal Ni and alkaline earth metals Ca, Mg, Ba and Sr are used as active components, the specific surface area of the catalyst is 121-226 cm < 2 > / g, the loading capacity of the catalyst Ni is 3-10 wt%, and the loading capacity of the alkaline earth metals is 15 wt%. The ZrHfTaP carrier is constructed through a coprecipitation method, a complexing agent assisted hydrothermal method is combined, a catalyst structure of the Ni semi-core-Ni alkaline earth metal interface transition layer-alkaline earth metal semi-shell loaded ZrHfTaP carrier is realized by regulating and controlling reaction conditions, and the problems that active metal is easy to inactivate and the selectivity of a target product is low are obviously solved. The catalyst is applied to the synergistic conversion process of biomass liquefaction light components and coking diesel oil light components, the yield of aviation fuel oil is 80%-95%, the efficient utilization rate of biomass carbon atoms is 70%-85%, and the obtained product meets the key quality index requirements of low-condensation aviation fuel.

This invention discloses a self-cleaning radiative cooling coating based on biomass carbon quantum dots, its preparation method, and its application. The coating comprises a polymer film-forming resin, carbon quantum dots, and hollow glass microspheres; wherein the mass ratio of the polymer film-forming resin to the filler is 1:(0.1-0.5), and the mass ratio of the hollow glass microspheres to the carbon quantum dots is 1:(0.05-0.2). This invention synergistically enhances solar reflectivity through the photoluminescence properties of carbon quantum dots and the scattering properties of hollow glass microspheres, while simultaneously utilizing the synergistic effect of fluorinated resin and modified hollow glass microspheres to endow the coating with superhydrophobic self-cleaning function. A single layer of this coating can achieve a solar reflectivity >92%, mid-infrared emissivity >94%, and contact angle >150°, possessing both efficient daytime radiative cooling and long-lasting self-cleaning performance. It is particularly suitable for passive heat dissipation of outdoor equipment such as new energy vehicle charging piles, and features simple process, environmental friendliness, and excellent performance.

The invention relates to a method for preparing high-purity porous silicon carbide ceramic from a biomass aerogel precursor. The method comprises the following specific steps: (1) preparing precursor sol; (2) gelatinizing, aging and forming a three-dimensional network structure; (3) solvent replacement; (4) performing supercritical drying to obtain biomass carbon-silicon dioxide composite aerogel; (5) carrying out carbon thermal reduction reaction to generate porous silicon carbide ceramic; and (6) decarbonizing and purifying to obtain the high-purity porous silicon carbide ceramic. The prepared porous silicon carbide ceramic material has high specific surface area, uniform pore size distribution and good mechanical strength, can effectively filter impurities such as particulate matters and harmful gases in gas, and shows excellent gas filtering performance. The material can be used in the fields of air purification, industrial waste gas treatment and the like, and has a wide application prospect.

The application discloses a kind of positive charge biomass carbon dots and preparation method and application thereof, belong to biomass carbon dot technical field.The application provides a kind of method for preparing nanoscale biomass carbon dots with positive charge using agricultural waste-tomato seedling, and the preparation method is simple and easy to operate, and the equipment requirement is low, material source is extensive, cheap and easy to obtain, no toxic chemical reagent is used, and it is environment-friendly, and the preparation cost is low;A new way for high-value utilization of tomato seedling is provided;The biomass carbon dots prepared are approximately spherical in shape, uniform in size, well dispersed, and have no aggregation phenomenon, with an average diameter of 10 nm and an average potential of +42.03 mV;Good hydrophilicity, strong stability;With blue, green, red and other fluorescent properties.

The invention belongs to the technical field of new energy materials, and particularly relates to a composite hard carbon material based on red mud and lignin as well as a preparation method and application of the composite hard carbon material. The preparation method comprises the following steps: respectively pretreating red mud and lignin, then preparing a red mud and lignin composite precursor, and then carrying out carbonization treatment and acid pickling post-treatment to obtain the composite hard carbon material. According to the method, the red mud and the lignin are compounded to prepare the hard carbon for the first time, the utilization rate of the red mud and the lignin is remarkably increased through cooperative regulation and control of a metal oxide template effect and a biomass carbon source, and the production cost of the hard carbon is reduced; the graded porous structure improves the ion transmission rate and the electrochemical performance; metal salt can be recycled from pickling waste liquid, and no toxic by-product is generated in the whole process.