Lamellar macroporous-mesoporous ZnO nano material and preparation method and application thereof

Abstract

The invention discloses a lamellar macroporous-mesoporous ZnO nano material which is of layered porous lamellar structure and in the form of wurtzite.The material is 10-20 Mum in lamella thickness, 300-600 nm in macropore diameter and 15-30 nm in mesopore diameter; the material is prepared by: using polystyrene-methylmethacrylate-3-sulfopropyl methacrylate potassium spheres as a template and ZnO nanocrystalline as a filler, preparing polystyrene-methylmethacrylate-3-sulfopropyl methacrylate potassium template sphere solution and ZnO nanocrystalline solution respectively, suction filtering layer by layer alternately, and carrying out suction filtering, drying and calcining.The lamellar macroporous-mesoporous ZnO nano material is lamellar, has controllable macropore diameter, good crystallinity and high purity and can avoid nanoparticle aggregation problem; compared with bulk stacked structures, the material enables the utilization rate of its internal material to be effectively increased; the material is applicable to the fields such as photocatalysis and gas-sensitive materials.

Description

technical field [0001] The invention belongs to the field of inorganic nano functional materials, in particular to a lamellar three-dimensional macroporous-mesoporous ZnO nano material and a preparation method thereof. Background technique [0002] In the past ten years, the problem of environmental pollution has become more and more serious, and it has become a problem that needs to be solved urgently, including water pollution, air pollution, soil pollution and so on. In order to solve these problems, researchers have done a lot of research. ZnO, as a semiconductor compound of Group IIB-VIA, has a bandgap of 3.37eV and a high binding energy (60meV), and is recognized as a potential semiconductor material. At present, there have been many researches and applications in the fields of photocatalysis, solar cells, nanogenerators, biosensors and gas sensors. [0003] According to literature reports, zinc oxide nanoparticles, nanowires, nanospheres, nanobelts, three-dimensiona...

AI Technical Summary

Problems solved by technology

However, although the synthesis and preparation technology of porous ZnO has become mature, the synthesis of three-dimensional porous ZnO powder materials with controllable pore size is still a technical problem.

For example, the porous ZnO three-dimensional superstructure synthesized in the patent CN103318941A is a porous zinc oxide nanostructure stacked by nanosheets, and the size is not uniform, and because of the pores formed by stacking, there is a problem of uncontrollable pore size; the coral-shaped superstructure synthesized in the patent CN102583509B The macroporous-mesoporous ZnO material has an obvious macroporous-mesoporous structure, but the pore size is different, which limits the research on the effect of pore size on macroporous-mesoporous ZnO nanomaterials

So far, the synthesis of three-dimensional macroporous-mesoporous ZnO structures with controllable pore size is mostly in the form of thin films, and the preparation and synthesis of three-dimensional macroporous-mesoporous ZnO structures with controllable pore size in powder form has rarely been reported.

Images