Black phosphorus quantum dots, titanium dioxide/black phosphorus quantum dot composite material, production methods of black phosphorus quantum dots and titanium dioxide/black phosphorus quantum dot composite material and application of titanium dioxide/black phosphorus quantum dot composite material

Abstract

The invention discloses a production method of a titanium dioxide / black phosphorus quantum dot composite material. The production method of the titanium dioxide / black phosphorus quantum dot compositematerial comprises the steps of (1) dispersing titanium tetrabutoxide and glycerin in ethyl alcohol respectively, then mixing obtained solutions, stirring an obtained mixture evenly, transferring themixture into a reaction kettle for reaction to obtain white powder, and then annealing the obtained white solid powder in a muffle furnace to obtain titanium dioxide micrometer flower; and (2) mixingthe titanium dioxide micrometer flower obtained in the step (1) and black phosphorus, conducting full grinding, then adding a ground mixture into a saturated aqueous solution of nitrogen, under the action of an ice-water bath, placing mixed liquid in a reaction kettle for hydrothermal treatment, and conducting centrifugal drying to obtain the titanium dioxide / black phosphorus quantum dot compositematerial. The titanium dioxide / black phosphorus quantum dot composite material can completely degrade dye methyl orange in 150 minutes, has photocatalytic activity higher than those of other photocatalysts relative to black phosphorus quantum dots under the same condition, and has the advantages of environmental protection, low consumption, high efficiency and good industrial prospects.

Description

technical field [0001] The invention belongs to the technical field of quantum dot materials, and in particular relates to a black phosphorus quantum dot, a titanium dioxide / black phosphorus quantum dot composite material and a preparation method and application thereof. Background technique [0002] Black phosphorus quantum dots (BP QDs) have become one of the most promising new energy materials due to their unique photoelectric properties, good biocompatibility, and fast carrier mobility. Since 2015, the liquid-phase exfoliation method using N-methylpyrrolidone (NMP) and water as solvents has been successively developed as the main method for preparing black phosphorus quantum dots. However, the pure liquid phase exfoliation method prepares quantum dots in aqueous solution with low yield, poor size controllability and stability; while the method with high yield and uniform size has cumbersome steps, high energy consumption, and relies heavily on The toxic organic solvent ...

AI Technical Summary

Problems solved by technology

However, the pure liquid phase exfoliation method prepares quantum dots in aqueous solution with low yield, poor size controllability and stability; while the method with high yield and uniform size has cumbersome steps, high energy consumption, and relies heavily on Toxic organic solvent N-methylpyrrolidone (NMP); and black phosphorus quantum dots agglomeration phenomenon is relatively serious, which greatly limits the improvement of its photocatalytic activity

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