77 results about "Calcium salts" patented technology

This invention relates to a detoxification method for simultaneously removing dioxins and heavy metals from waste incineration fly ash. The method includes fly ash pretreatment and simultaneous removal of dioxins and heavy metals. First, sodium and potassium salts are removed from the fly ash by immersion washing to avoid reducing the ability of the sintered products formed during high-temperature sintering to solidify heavy metals. Then, the pretreated fly ash is separated to obtain a solid phase, which is mixed with magnesium and / or calcium salts and subjected to high-temperature roasting. This allows the chlorine from the decomposition of dioxins in the fly ash to react with the heavy metals to form gaseous heavy metal chlorides, thus removing the heavy metals from the fly ash. During the high-temperature roasting process, the magnesium and / or calcium salts react with the ash in the fly ash to form calcium silicate and / or magnesium silicate, enhancing the solidification ability of the internal lattice of the fly ash sintered products. After detoxification treatment of waste incineration fly ash using this method, no heavy metals Hg, Pb, Cd, Cu, and Ni were detected in the fly ash leachate, significantly reducing the leaching risk of residual heavy metals in the fly ash.

This invention relates to the field of textile printing and dyeing, and discloses a high-colorfastness polyamide 56 fabric and its preparation method. The polyamide 56 fabric contains 70-100% polyamide 56 fiber and 0-30% spandex. The fabric has been dyed at least once, and the dye used for dyeing is a reactive dye. The polyamide 56 fabric dyed with reactive dyes of this invention has the advantages of higher dye uptake, wider pH adaptability, no need for large amounts of calcium salts for dyeing, and minimal or no use of color-fixing crosslinking agents.

Provided herein is a method for the manufacture of a compound of obicetrapib and salts thereof, such as calcium salts thereof. Also provided herein is amorphous obicetrapib hemicalcium. New intermediates for use in the synthesis of obicetrapib, and salts thereof, are also provided, including obicetrapib HCl and a mesylate salt for the use in the synthesis of obicetrapib and amorphous obicetrapib hemicalcium.

This invention discloses a high-strength microbial cemented backfill material for mining with high efficiency in CO2 sequestration and its preparation method. The material uses a composite carbonic anhydrase-producing microorganism composed of *Bacillus mucilaginosus* and *Bacillus halophilus* as its core, in conjunction with soluble calcium salts, porous hydroxyapatite, industrial solid waste aggregates, and an organic acid-nanoparticle composite inducer, to achieve efficient CO2 mineralization and high-strength cementation under extreme high-salt and medium-high temperature environments in mines. Experiments show that the material achieves a 7-day compressive strength of 16.3–20.2 MPa, a CO2 sequestration capacity of 82.6–101.3 g / kg, and a microbial survival rate exceeding 80%, achieving a synergistic improvement in strength and carbon sequestration efficiency. This material has a simple process, is environmentally friendly, and is suitable for mining engineering such as goaf backfilling and roadway support, providing a new path for the integration of green mining and carbon sequestration.

The invention discloses demineralized dentin remineralization mouthwash based on cp20k-p3 bionic polypeptide and an application of the demineralized dentin remineralization mouthwash. The mouthwash is prepared by mixing the polypeptide cp20k-p3 (the amino acid sequence is CNQKHPCWRRHGKKHRGLHRKFHGNACNC) derived from barnacle mucin 20K, an aqueous solution of calcium salt and an aqueous solution of phosphate. The polypeptide can specifically recognize and adsorb an organic matrix exposed on the surface of demineralized dentin, guide hydroxyapatite crystals to directionally deposit on the demineralized part of the dentin, and form a compact mineralized layer similar to a natural structure on the surface of the dentin. Compared with a calcium phosphate mixed aqueous solution without cp20k-p3, the preparation method is simple and convenient to operate, can form a compact mineralized layer with the surface of the re-demineralized dentin, and has excellent stability in an oral environment.

The invention discloses a core-shell structure gradient layer sustained-release hydroxyapatite-PDRN / PN multiple compound as well as a preparation method and application thereof, and belongs to the technical field of biological materials. The preparation method comprises the following steps: S1, mixing a macromolecular solution with hydroxyapatite microspheres, and adjusting the pH value to be alkaline to obtain a suspension before in-situ mineralization; s2, mixing with calcium salt and phosphate, reacting, and carrying out solid-liquid separation to obtain an initial composite precipitate; s3, optionally, the initial composite precipitate is subjected to n times of coating circulation, and n is an integer ranging from 1 to 6; and S4, dispersing the initial composite precipitate or the final composite precipitate obtained after coating circulation in S3 into a solution containing PDRN or / and PN, so as to obtain a dispersion liquid of the core-shell structure gradient slow-release hydroxyapatite-PDRN / PN multiple compound. According to the method, the long-acting and stable hydroxyapatite-PDRN / PN multiple compound can be prepared, and the problems that in the prior art, a composite repairing material is not uniform in mixing, not matched in degradation behavior, short in biological activity maintaining time, low in cell utilization efficiency and the like are solved.

To provide a method for producing a hydraulic hardened body, which reduces the amount of energy consumption and the amount of CO2 discharge in material production and is excellent in producibility of a precast product.SOLUTION: A method for producing a hydraulic hardened body includes kneading and hardening a hydraulic composition containing a binder (A), an admixture (B), water, an aggregate, and an admixture, wherein the proportion of the admixture (B) in the total of the binder (A) and the admixture (B) is 2 mass% to 10 mass%. In the binder (A), the proportion of the high-early-strength portland cement is 20 mass% to 55 mass%, the proportion of the blast furnace slag fine powder is 45 mass% to 75 mass%, and the total of these two components accounts for 90 mass% or more of the whole. The admixture (B) contains organic calcium salts, inorganic calcium compounds, and inorganic sulfates, and has a CaO content of 53 mass% to 58 mass%, a SO3 content of 15 mass% to 20 mass%, a total alkali content of 2.5 mass% to 2.8 mass%, and an ignition loss of 20 mass% to 25 mass%.SELECTED DRAWING: None

This invention discloses a method for improving the physical properties of PVDF-based secondary battery slurry by adding calcium salts, relating to the field of battery slurry improvement technology. The method includes the following steps: Step 1: Weighing calcium salt and dissolving it in water to obtain a calcium salt solution, which is then mixed with an organic solvent; Step 2: Weighing PVDF and adding it to the solution while stirring to dissolve the binder in the organic solvent, resulting in a viscous liquid; Step 3: Weighing a conductive agent and adding it to the viscous liquid while stirring to mix the conductive agent and binder, resulting in a dispersion system; Step 4: Weighing an active material and adding it to the dispersion system while stirring to mix the active material with the conductive agent and binder, resulting in a battery slurry; Step 5: Coating the battery slurry onto a current collector, and then drying the coated electrode. By adding trace amounts of calcium salts to the slurry, the PVDF binder is rapidly dispersed in the organic solvent, effectively improving the adhesion between the battery slurry and the aluminum foil current collector.

The invention provides an organic metal calcium salt compound for relieving aluminum toxicity and application thereof, and belongs to the technical field of environmental restoration. The organic metal calcium salt compound is a folinate calcium salt hydrate (FCa), the chemical formula is C20H21CaN7O7. NH2O, and n is equal to 1-3. The folic acid analogue and the calcium salt are integrated to form a stable coordination structure, so that the bioavailability of Al < 3 + > in the environment is effectively reduced, the stress effect of aluminum toxicity on plants is relieved, and the compound has the characteristics of environment friendliness and remarkable slow-release effect, and is suitable for repairing and treating water bodies and acidified soil.

This invention discloses a microbial self-healing bio-aggregate, belonging to the field of concrete material technology. It is composed of microorganisms, low-alkali cement, synergistic repair components, and nano-active fillers. The microorganisms are *Bacillus pasteurellii*, the low-alkali cement is sulfoaluminate cement, the synergistic repair components include urea as a metabolic substrate and organic calcium salts as an external calcium source, and the nano-active fillers are nano-silica or nano-calcium carbonate. The internal pore pH value of the low-alkali cement stone is 9.0 to 11.0. When the bio-aggregate is incorporated into concrete as a functional aggregate and cracks form along with the concrete, and water enters the cracks, the microorganisms inside the low-alkali cement stone react with the synergistic repair components under the influence of water, forming mineralized deposits at the crack locations to achieve crack repair.

This application provides a method for recycling lithium-aluminum-silicon glass waste, relating to the field of solid waste resource utilization. The method includes: mixing lithium-aluminum-silicon glass waste powder with additives, calcining to obtain a calcined material, wherein the additives include sodium and calcium salts, the sodium salt including at least one of sodium sulfate and sodium bisulfate, and the calcium salt including at least one of calcium sulfate and calcium bisulfate. The molar amount of calcium in the additives is more than 0.4 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste, and the molar amount of sodium is more than 0.9 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste. The calcined material is then mixed with a leaching agent for leaching. The lithium-containing leaching solution of this application contains few types and amounts of impurities, and high-purity lithium compounds can be prepared after simple impurity removal treatment. This enables efficient recovery and reuse of valuable elements in low-value lithium-aluminum-silicon glass waste, solving the environmental pollution problem caused by glass waste stockpiling and reducing space occupation.

The utility model discloses a device for biologically solidifying construction waste, which relates to the technical field of constructional engineering and comprises a support, a humidity control maintenance bin is fixedly connected to the inner wall of the support, a solidifying mechanism is arranged on the support, a uniform spraying mechanism is arranged on the support, and the humidity control maintenance bin is fixedly connected to the inner wall of the support. By arranging the strain culture reactor, firstly, urease-producing bacteria are cultured in the strain culture reactor, a culture medium containing urea and calcium salt is supplied for proliferation, high-activity bacterial liquid is obtained, then to-be-cured building waste crushed aggregates such as waste bricks and stones and concrete particles are flatly laid in the humidity-control curing bin, and the humidity-control curing bin is used for curing the building waste. According to the mechanism, urea in a nutrient solution is promoted to be decomposed through urease generated by bacteria, carbonate ions are formed, then the carbonate ions are combined with calcium ions to precipitate calcium carbonate crystals, adjacent particles are cemented together, building waste stacks can be reinforced into blocks or roadbed materials without traditional cementing materials such as cement, the process is environmentally friendly, and the construction waste is recycled. And new engineering value is given to the construction waste.

This application provides a calcination auxiliary material for recycling lithium-aluminum-silicon glass waste, its preparation method, application, and application method in the resource recovery of lithium-aluminum-silicon glass waste, as well as the calcined clinker, relating to the field of solid waste resource recovery and treatment. The calcination auxiliary material for recycling lithium-aluminum-silicon glass waste includes sodium and calcium salts, wherein the sodium salt includes at least one selected from Na₂SO₄ and NaHSO₄, and the calcium salt includes at least one selected from CaSO₄ and Ca(HSO₄)₂. The molar amount of calcium in the auxiliary material is more than 0.4 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste, and the molar amount of sodium is more than 0.9 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste. Applying the calcination auxiliary material of this invention to the calcination of lithium-aluminum-silicon glass waste enables the efficient recovery and reuse of valuable elements in low-value lithium-aluminum-silicon glass waste.

To provide a method for reducing precipitation in bacterial fermentation processes. [Solution] A method comprising the steps of a) culturing host cells for bacterial growth in a batch phase using a batch medium, and b) culturing host cells in a fed batch phase to produce a fermentation product using a feed medium, wherein the feed medium and the batch medium are each non-precipitated medium solutions, i) the batch medium comprises calcium salts, magnesium salts, phosphates, and at least one chelating agent which is at least 5 mM citrate and / or citric acid and / or at least 1 mM EDTA, ii) the feed medium contains at least 1 mM of calcium salts which is at least 5 times higher than that of the batch medium, iii) the feed medium contains at least 3 mM of magnesium salts which is at least 2 times higher than that of the batch medium, and iv) the feed medium contains less than 90% of the amount of phosphates contained in the batch medium.

This invention belongs to the field of biomedical and health care technology. Specifically, this invention relates to a composition of metabiotics and calcium salts and its application. Our unit unexpectedly discovered, through extensive research, that *Lactobacillus delbrueckii* subsp. bulgaricus Lb-87 (… Lactobacillus delbrueckii subsp. Bulgaricus Lb-87 (a metabiotic) can synergistically work with calcium salts to significantly improve the absorption rate of calcium ions in the body, thereby effectively promoting calcium utilization and maintaining normal physiological functions. This discovery provides a new technical path and solution for developing foods, pharmaceuticals, health foods, and dietary supplements with highly efficient calcium absorption-promoting functions and multiple effects.

The present invention provides a solution for immersing a three-dimensional cell culture for transplantation, the solution comprising: one or more divalent metal salts selected from the group consisting of calcium salts, magnesium salts, and the like; and an aqueous solvent, wherein said solution satisfies at least one among the following (a)-(c), and has an osmotic pressure of 150-1,200 mOsm / L. (a) When calcium salts are contained, the content thereof is 5-700 ppm in terms of calcium ions. (b) When magnesium salts are contained, the content thereof is 5-1,000 ppm in terms of magnesium ions. (c) When other divalent metal salts are contained, the content thereof is 0.01-100 ppm in terms of metal ions.

This application specifically relates to a zero-discharge treatment process for fluoride-containing wastewater. The process is as follows: In the pretreatment stage, a three-stage reaction sedimentation process is employed. First, the pH is adjusted and calcium salts are added for initial fluoride removal via coagulation sedimentation. Then, a second stage of coagulation sedimentation is performed, adding a composite defluorinating agent for deeper fluoride removal. Finally, a third stage of hardness removal is conducted, adding sodium carbonate and sodium hydroxide to remove hardness and adjust the pH. In the softening stage, the pretreated effluent undergoes sand filtration and resin exchange softening treatment sequentially to further purify the water. In the membrane concentration stage, after ultrafiltration, the effluent enters a two-stage reverse osmosis system. The desalinated water is directly reused, while the concentrated water is further concentrated. In the evaporation and crystallization stage, the reverse osmosis concentrate is introduced into an MVR evaporation and crystallization system to obtain crystalline salts. The evaporated desalinated water is simultaneously reused, achieving zero wastewater discharge. This application reduces the risk of membrane scaling through dual protection, achieves a total system recovery rate exceeding 99%, and the MVR system is more energy-efficient than traditional processes. Fully automated control improves operational stability and enables efficient sludge dewatering.

The invention discloses a waste incineration fly ash washing liquid calcium chloride extraction system which comprises an air stripping tower, a pH adjusting tank, a filter press, a second-effect forced circulation evaporator, a first-effect forced circulation evaporator, a DTB crystallizer, a drying machine, a single-effect forced circulation evaporator, a fluidized bed, an electrostatic separator, a heating furnace and three groups of centrifugal machines, the three groups of centrifugal machines are respectively a first centrifugal machine, a second centrifugal machine and a third centrifugal machine. The method has the advantages that interference of impurity ions on follow-up salt separation is reduced through deamination pretreatment, particle characteristics are improved through high-temperature drying, surface charges are optimized through low-temperature complexing, accurate separation of potassium, sodium and calcium salts is achieved through electrostatic separation, and carbon emission is reduced by combining an ammonia gas recycling technology.

This invention relates to the field of foundation technology for foundation formation on frozen ground, and discloses a method for hardening temporary roadbeds in seasonally frozen soil. This invention rationally utilizes the characteristic that temporary roads only need to prevent thaw subsidence, not frost heave. Using a mobile grouting device, soluble calcium salts and sodium silicate are injected together into the frozen seasonal soil. The soluble calcium salts not only melt the frozen soil at low temperatures, similar to de-icing salt, allowing the frozen soil to participate in the subsequent solidification process, but also react with sodium silicate to solidify the melted frozen soil into a grout-filled aggregate. This allows for rapid and cost-effective reinforcement of seasonally frozen soil, preventing further thaw subsidence. Furthermore, the use of the mobile grouting device is separate from the freezing and solidification process; steps requiring large construction machinery are performed entirely while the frozen soil is in a solidified state, unaffected by thawing.

This invention proposes a Bifida ferment lysate, its preparation method, and its application, belonging to the field of cosmetic technology. The first fermentation product is obtained by enzymatic fermentation of Ganoderma lucidum, Poria cocos, Nostoc commune, oats, lactoferrin, and ginseng. Konjac gum hydrolysate and collagen and glycosaminoglycans extracted from tilapia skin are added, and fermentation continues to obtain a second fermentation product. Modified lysozyme is added for enzymatic hydrolysis, followed by centrifugation. The supernatant is collected, and copper and calcium salts are added and stirred to obtain a Cu-Ca chelated fermentation lysate. The product is then encapsulated to obtain the Bifida ferment lysate, which has excellent whitening, moisturizing, antibacterial, soothing, skin-repairing, and pH-regulating effects on the skin. It is safe, non-toxic, non-irritating to the skin, highly absorbable by the skin, and has a long shelf life, showing broad application prospects.

The invention discloses a waste lithium battery pyrolysis tail gas purifying agent and a preparation method and application thereof. The waste lithium battery pyrolysis tail gas purifying agent comprises a salt compound, clay minerals and sodium alkyl benzene sulfonate, wherein the salt compound comprises calcium salt or magnesium salt; the purifying agent comprises the following components in percentage by mass: 20-75% of salt compound; 20%-60% of clay mineral; and 5%-20% of sodium alkyl benzene sulfonate. According to the purifying agent, volatile organic compounds such as carbonic esters, hydrocarbons and alcohols in the waste lithium battery pyrolysis tail gas can be effectively removed by adjusting the dosage and proportion of all the components of the purifying agent, acid fluorine-phosphorus gas can be removed, the purpose of short-range treatment of the pyrolysis tail gas is achieved, the purifying effect of the purifying agent for treating the pyrolysis tail gas is good, and the purifying agent is suitable for industrial production. The preparation method is simple, and the compound raw materials for preparing the purifying agent are cheap and easy to obtain.

The invention discloses a medicine tablet as well as a preparation method and application thereof. The medicine tablet is an amorphous tablet; the medicine tablet comprises an inorganic mineral and an active medicine, wherein the inorganic mineral is a combination of one or more than two inorganic calcium salts, and the structural water content of the inorganic mineral is 1-16%; the active medicine is solid, the content of the active medicine is less than or equal to 10%, and the percentage is the mass percentage of the active medicine in the medicine tablet. The medicine tablet is an amorphous tablet, and the medicine is uniformly distributed in the medicine tablet, so that the activity of the medicine is kept, and the effect of long-acting release of the medicine driven by an inorganic mineral crystallization process is also realized.

The subject of the application is an oil for hot heat treatment of steel, which contains 80.5% - 92.0% (m / m) of base oil containing I) 20.0% - 60.0% (m / m) of wax - modified lanolin having a kinematic viscosity at 40°C of 485.0 - 598.0 mm2 / s and a pour point of 2°C - 16°C and characterized by a distillation range such that less than 5% V / V distils to 458°C and at least 95% V / V distils to 645°C, II) 20.0% - 45.0% (m / m) of mineral oil having a kinematic viscosity at 40°C of 28.0 - 39.0 mm2 / s and a pour point of -8°C to -18°C and which is characterized by a distillation range such that less than 5% V / V distills to 315°C and at least 95% V / V distills to 470°C, III) 5.0 - 40.0 (m / m) of Brightstock base oil, having a kinematic viscosity at 40°C of 470.0 - 560.0 mm2 / s and a pour point of -5°C to -12°C, and which is characterized by a distillation range such that,that less than 5% V / V distils up to 440°C and at least 95% V / V distils up to 675°C and contains two packages of improvers in the amount of: a) 1.5% - 6.0% (m / m) of a package of improvers containing, calculated on the total weight of this package, 5% - 9.9% (m / m) bis(nonylphenyl)amine and 5% - 9.9% (m / m) sulphurised calcium salts and alkyl derivatives of phenols, mainly dodecylphenol and 0.5% - 0.99% (m / m) tetrapropenylphenol isomers dissolved in mineral base oil, the content of which in the package is from 30% to 60% (m / m), b) 1.5% - 8% (m / m) of a package of improvers containing, in calculated on the total weight of this package, a mixture of 70% (m / m) hydrocarbon resins with 30% (m / m) non-aromatic hydrocarbons obtained from the vacuum residue after distillation of crude oil or by separating the raffinate - oil in the process of deasphalting the vacuum residue, and additionally contains 2 refining additives with different functions, in amounts of c) 0.2% - 4,0% (m / m) of ashless dispersant, type mono- and / or bis-polybutenesuccinimides, with a base number of not more than 18 mg KOH / g and a viscosity at 100°C of not more than 330 mm2 / s, d) 0.2% - 3.0% (m / m) of viscosity modifier - polymer of esters of acrylic acid and methacrylic acid with aliphatic alcohols (C1-C18), dissolved in mineral base oil and with a viscosity of the entire mixture at 100°C in the range from 660 mm2 / s to 980 mm2 / s,

A fluidic hemostat agent comprising a solid hemostatic additive suspended in a silanol carrier fluid to form a heterogeneous mixture that exhibits sufficient flowability to allow for injection and proliferation, while simultaneously having sufficient adhesive and viscoelastic characteristics to remain at the application site and enable the clotting cascade time to form a thrombus. The silanol carrier fluid preferably comprises liquid silanol-bearing POSS molecules, while the solid hemostatic additive preferably is selected from the group consisting of kaolin, chitin, chitosan, cellulose, keratin pectin, acetylated glucosamine, dry fibrin, gelatin, and calcium salts. A preferred silanol species is iso-octylPOSS trisilanol having the molecular representation [(i-ocylSiO1.5)4(i-octyl(OH)SiO1.0)3]Σ7.

There is disclosed a composition comprising one or more calcium salts, for use in a treatment or augmenting treatment of non-thermal ablation, the treatment comprising: administering an effective amount of said composition to the subject via a systemic route of administration; delivering non-thermal ablative energy to the target tissue. There is further disclosed ablation equipment for delivering non-thermal energy to treat target regions of tissue in organs, wherein a single power source is configured to generate electric sinusoidal voltage signals to energize each electrode of the equipment; and wherein the single power source is configured to supply at least first and second electrodes that are adjacent to each other on said ablation catheter, with sinusoidal electric voltage signals in phase or out of phase with each other to generate a unipolar electric field and / or a bipolar electric field for delivering the non-thermal energy to the tissue to be treated.

A razor blade with a substrate having a cutting edge and a soft coating disposed on at least a portion of the substrate or on an intermediate layer itself disposed on at least a portion of the substrate. The soft coating including a lubricious material and an antibacterial additive selected from the group consisting of one or more metals, one or more metal salts, and mixtures thereof. The metal is selected from the group consisting of silver, copper, zinc, cobalt, nickel, zirconium, and molybdenum. The metal salt is selected from the group consisting of silver salts, copper salts, zinc salts, and calcium salts.

A chemical-based energy storage system, including a porous matrix structure impregnated with a thermochemical material. The thermochemical material stores and releases thermal energy though a reversible chemical reaction. The thermochemical material desirably includes a salt hydrate, wherein the thermochemical material absorbs thermal energy during a dehydration reaction and discharges stored energy through a hydration reaction. The salt hydrate can be an inorganic salt selected from calcium salts, magnesium salts, sodium salts, strontium salts, lithium salts, and combinations thereof.

This invention relates to the field of road engineering, specifically to a process for constructing a road without a subbase using refined slag and converter slag. The process involves crushing converter slag as the skeleton aggregate and mixing it with refined slag as the fine aggregate. Pasteurella multocida inoculum solution and a cementing solution containing soluble calcium salts and urea are alternately sprayed into the mixture in stages and mixed. After paving, compaction, and curing, the mixture is covered and left to stand. Microbial metabolism generates calcium carbonate crystals in situ at the contact points between steel slag particles, forming a microscopic cementing network. This process, through in-situ mineralization and physical coating, blocks the contact between free calcium oxide and moisture inside the converter slag, eliminating local expansion stress caused by delayed hydration of free calcium oxide in the subbase structure, preventing the expansion and fracture of microcracks within the base layer, and cementing the steel slag mixture into a monolithic load-bearing slab.

The invention provides mineralized hydrogel as well as a preparation method and application thereof. The preparation method of the mineralized hydrogel provided by the invention comprises the following steps: firstly, preparing a calcium salt-loaded electrostatic spinning fiber by using a calcium salt, polylactic acid and polyoxyethylene; secondly, mixing the electrostatic spinning fibers loaded with the calcium salt with a hydrogel precursor solution containing phosphate, initiating the hydrogel precursor solution to generate a cross-linking reaction, and combining calcium ions released from the electrostatic spinning fibers with phosphate ions in the hydrogel in a network to form a mineralized core; finally, the pre-mineralized hydrogel is sequentially subjected to mineralization treatment in a solution containing calcium ions and a solution containing phosphate ions, a large number of mineralized particles are formed, and the mineralized hydrogel is obtained. The preparation method provided by the invention is beneficial to improving the Young modulus of the hydrogel and balancing the relationship between the rigidity of the hydrogel and the mineralization speed, and provides a solution thought for taking the rigidity-enhanced hydrogel as a bone defect repair material.

This invention discloses a method for preparing Ca-doped ZnO nanosheet photocatalyst mediated by cactus juice. The method uses cactus juice simultaneously as a calcium source, morphology modifier, and green solvent, and obtains nanosheets through a room-temperature co-precipitation-calcination process. This method requires no additional inorganic calcium salts, is simple, low-cost, and environmentally friendly. Ca-doped ZnO nanosheets were successfully prepared using this method, and these materials exhibit excellent photocatalytic hydrogen production performance under visible light irradiation, with a peak activity reaching 889 μmol·g⁻¹. ‑1 ·h ‑1 It has an efficiency of about 4 times that of pure ZnO and can be widely used in fields such as solar photocatalytic hydrogen production and optoelectronic devices.