46results about How to "Preparation method simple green" patented technology

The invention discloses a method for preparing near-infrared carbon quantum dots by using fuchsin as a carbon source. The method comprises the following steps: weighing 1.0000g of yellow ginger extraction residues, putting into a 50mL hydrothermal reaction kettle, adding 40mL of secondary water, putting in a drying box, reacting at 200 DEG C for 2 hours, after the reaction finishes, cooling to room temperature, and filtering to obtain the carbon quantum dot solution; dissolving 0.01507g of fuchsin, and adding the solvent to a constant volume in a 50mL volumetric flask to obtain a 1.0*10<-3> mol / L fuchsin solution; adding the fuchsin solution and carbon quantum dot solution into a 50mL reaction kettle, uniformly mixing, adding secondary water until the total reaction volume is 40mL, putting in a drying box, and reacting at 220 DEG C for 4 hours; and after the reaction finishes, cooling to room temperature, and filtering to obtain the near-infrared carbon quantum dots. The near-infrared carbon quantum dots prepared by the method have the advantages of stable properties and high fluorescence intensity, and have application prospects in the fields of biological imaging, sensing, drug transfer, photocatalysis, biological living imaging and the like.

The invention relates to a boron / nitrogen co-doped gelatin-based two-dimensional carbon plate and a preparation method and application thereof. The preparation method comprises the following steps of: dissolving and mixing gelatin and boric acid which serve as raw materials, carrying out evaporation-induced assembly, co-pyrolysis and boiling water backflow to prepare the two-dimensional carbon plate; mixing the boron / nitrogen co-doped two-dimensional carbon plate, carbon black and polytetrafluoroethylene according to a proportion to prepare a carbon pole piece serving as a supercapacitor electrode piece; or mixing with the carbon black and polyvinylidene fluoride according to a proportion to prepare a slurry serving as an electrode piece of a button lithium ion battery. The obtained carbon plate has high content of nitrogen and boron, pore size distribution is concentrated, and the carbon plate is large in size and thin in thickness; such carbon plate has a series of advantages of high specific capacitance, high rate performance and the like when serving as the electrode materials of a supercapacitor and the lithium ion battery; and moreover, the electrode has high cycling stability. The preparation method has the advantages of simplicity and greenness in process, short consumed time and the like, and the device is simple and available.