TiO2@SnSexS2-x@SnO2 bifunctional composite structure and preparation method thereof

Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a TiO2@SnSexS2-x@SnO2 bifunctional composite structure and a preparation method thereof. The method comprises the following steps: dissolving a certain amount of stannic chloride, sodium selenite and thioacetamide in an ethanol and acetic acid solution, and then adding TiO2 nanotubes to form a mixed solution B; adding the prepared mixed solution B into a reaction kettle, putting the reaction kettle into a constant-temperature box, and reacting for several hours at a certain temperature to obtain a TiO2@SnSexS2-x tubular lamellar structure; and placing the obtained TiO2@SnSexS2-x tubular lamellar structure in a muffle furnace to be annealed for several minutes at a certain temperature to obtain the TiO2@SnSexS2-x@SnO2 bifunctional tubular lamellar composite structure. The method is simple in preparation process, and the obtained product is uniform, novel in morphology, large in specific surface area, adjustable in energy level, excellent in catalytic performance, excellent in heavy metal ion adsorption and catalytic performance and capable of meeting different applications.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a TiO 2 @SnSe x S 2-x @SnO 2 Bifunctional composite structure and preparation method thereof. Background technique [0002] At present, the environmental problems are relatively serious, and among many environmental treatment methods, catalyst is one of the more effective methods. Among many catalytic materials, TiO 2 There are more studies and more mature materials. But TiO 2 There are also disadvantages, such as its wide band gap, which is not conducive to photoabsorption catalysis. Although there are existing improvements aimed at the above problems, the effects are not good. For example, choose narrow bandgap SnS 2 instead, or SnO 2 , existing methods also use TiO 2 @SnO 2 Composite, or TiO 2 @SnS 2 Recombination, etc. to improve its band gap, but the effect is not good. [0003] Among the many improvements, transition metal sulfides are an MX 2 Type com...

AI Technical Summary

Problems solved by technology

But TiO 2 There are also disadvantages, such as its wide band gap, which is not conducive to photoabsorption catalysis

Although there are existing improvements to address the above problems, the effects are not good

For example, choose narrow bandgap SnS 2 instead, or SnO 2 , existing methods also use TiO 2 @SnO 2 Composite, or TiO 2 @SnS 2 Combination, etc. to improve its band gap, but the effect is not good

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