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Preparation method for ZnO nanomaterial with hierarchical porous structure

A nanomaterial, hierarchical porous technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex reaction and high cost, and achieve uniform macropore distribution, low cost and low cost. Effect

Inactive Publication Date: 2015-10-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction is complicated and the cost is high

Method used

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  • Preparation method for ZnO nanomaterial with hierarchical porous structure
  • Preparation method for ZnO nanomaterial with hierarchical porous structure
  • Preparation method for ZnO nanomaterial with hierarchical porous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of the ZnO nanometer material with hierarchical porous structure provided by the invention, concrete operation steps are as follows:

[0035] Step 1, preparation of pore-forming agent

[0036] Sodium chloride is selected as the macroporous pore-forming agent, and sodium chloride is placed in a crucible for sintering, and the sintered sodium chloride is fully ground with a mortar, and the ground sodium chloride is sub-sieved to obtain 100 -120 purpose spare;

[0037] Step 2, alloy melting

[0038] Weigh 40g of industrial pure Al and 60g of industrial pure Zn, place the configured raw materials in a crucible and heat them in a heating furnace at 700°C for alloy melting, stir continuously to mix the molten alloy evenly, and keep it in a molten state for later use;

[0039] Step 3, Alloy Suction Casting

[0040] Put the treated 100-120 mesh sodium chloride obtained in step 1 into a glass tube, and perform suction casting with a vacuum pump un...

Embodiment 2

[0048] A kind of preparation method of the ZnO nanometer material with hierarchical porous structure provided by the invention, concrete operation steps are as follows:

[0049] Step 1, preparation of pore-forming agent

[0050] The macroporous pore-forming agent is sodium chloride, which is placed in a crucible for sintering, and the sintered sodium chloride is fully ground with a mortar, and the ground sodium chloride is sub-sieved to obtain < 100 purpose spare;

[0051] Step 2, alloy melting

[0052] Weigh 70g of industrially pure Al and 30g of industrially pure Zn, place the configured raw materials in a crucible and heat the alloy at 700°C in a heating furnace, stir continuously to mix the molten alloy evenly, and keep it in a molten state for later use;

[0053] Step 3, Alloy Suction Casting

[0054] Put the treated <100 mesh sodium chloride obtained in step 1 into a glass tube, and use a vacuum pump to suction-cast the alloy liquid in molten state until the molten al...

Embodiment 3

[0062] A kind of preparation method of the ZnO nanometer material with hierarchical porous structure provided by the invention, concrete operation steps are as follows:

[0063] Step 1, preparation of pore-forming agent

[0064] Sodium chloride is selected as the macroporous pore-forming agent, and sodium chloride is placed in a crucible for sintering, and the sintered sodium chloride is fully ground with a mortar, and the ground sodium chloride is sub-sieved to obtain 100 -150 purpose spare;

[0065] Step 2, alloy melting

[0066] Weigh 60g of industrial pure Al and 40g of industrial pure Zn, place the configured raw materials in a crucible and heat them in a heating furnace at 700°C for alloy melting, stir continuously to mix the molten alloy evenly, and keep it in a molten state for later use;

[0067] Step 3, Alloy Suction Casting

[0068] Put the treated 100-150 mesh sodium chloride obtained in step 1 into a glass tube, and perform suction casting with a vacuum pump un...

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Abstract

The invention discloses a preparation method for a ZnO nanomaterial with a hierarchical porous structure. The preparation method is characterized in that pure Zn metal and pure Al metal are smelted to obtain a smelted substance, the smelted substance is sucked into a pore-forming agent for suction casting molding, the molded substance is placed in a corrodent after being cleaned to be freely corrode to dealloy, and finally, the dealloyed substance is subjected to oxidation and sintering to obtain the ZnO nanomaterial with the hierarchical porous structure. The ZnO nanomaterial is prepared from non-noble metals and amphoteric metal Zn and amphoteric metal Al are used as two phases of an alloy. The melting points of the two metals are both low, the melting difficulties of the two metals are low, and the costs of the two metals are low; sodium chloride is subjected to sintering, grinding and sieving to form a macroporous pore-forming agent, the operation is simple and convenient, and the cost is low; a NaOH solution is taken as a corrodent during the process of freely corroding to dealloy; the ZnO nanomaterial with the hierarchical porous structure is prepared by adopting a method for freely corroding to dealloy; macropores in the prepared material are uniformly distributed, and the material is integral and complete and owns a certain mechanical property; the product is stable in air, and low in possibility of degeneration.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-inorganic non-metallic semiconductor materials, and in particular relates to a preparation method of ZnO nano-materials with hierarchical porous structure. Background technique [0002] Zinc oxide has a bandgap width of 3.37eV and an exciton binding energy of 60meV. It is a wide-bandgap semiconductor material that is widely used. It is currently widely used in plastics, synthetic rubber, silicate products, paints, sunscreens, adhesives, etc. Mixture, catalysis and other fields. Zinc oxide also has important application value in piezoelectric materials and gas sensing materials. Hierarchical porous ZnO refers to a porous ZnO material with a special structure that has a large number of fine pores with smaller diameters and uniform distribution on the pore wall of porous ZnO. Compared with ordinary porous ZnO, it has the high passability of general macroporous ZnO and the high specific ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00
Inventor 颜国君白剑张雄
Owner XIAN UNIV OF TECH
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