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High specific surface area mesoporous zinc oxide nano-cluster and preparation method thereof

A zinc oxide nanotechnology, high specific surface area technology, applied in zinc oxide/zinc hydroxide, nanotechnology and other directions, can solve the problems of difficult to synthesize zinc oxide powder materials, complicated and tedious reaction steps, high reaction temperature, etc. Catalytic degradation characteristics, good experimental repeatability, good thermal stability

Active Publication Date: 2017-07-28
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as we know, although people have effectively improved the specific surface area, stability and catalytic activity of zinc oxide powder materials by constructing hollow and mesoporous structures, it is still difficult to synthesize ZnO powders with a specific surface area greater than 50 sq. m / g zinc oxide powder material, and the existing zinc oxide hollow, mesoporous microsphere preparation method usually requires complex and cumbersome reaction steps, higher reaction temperature or longer reaction time

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  • High specific surface area mesoporous zinc oxide nano-cluster and preparation method thereof
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  • High specific surface area mesoporous zinc oxide nano-cluster and preparation method thereof

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Embodiment 1

[0028] Preparation of Mesoporous ZnO Nanoclusters with High Specific Surface Area

[0029] First, add 6 ml of deionized water to 32 ml of ethylene glycol solution, stir well to obtain a mixed solution of ethylene glycol and water; Add 0.5 ml of 4 mol / L zinc nitrate aqueous solution, 1 ml of 10 mol / L sodium hydroxide aqueous solution, and 0.5 ml of 2 mol / L sodium chloride aqueous solution in sequence to obtain a reaction precursor for preparing mesoporous zinc oxide nanoclusters with high specific surface area solution, wherein the volume ratio of ethylene glycol and water in the precursor is 80:20, and the concentrations of zinc nitrate, sodium hydroxide, and sodium chloride are respectively 0.05 mol / liter, 0.25 mol / liter, and 0.025 mol / liter; finally The prepared reaction precursor solution was reacted under stirring at room temperature for 1 hour to obtain the following: figure 1 The color shown in a is a milky white mesoporous zinc oxide nanocluster colloidal solution; aft...

Embodiment 2

[0031] Preparation of Mesoporous ZnO Nanoclusters with Different Scales and High Specific Surface Area

[0032] First, take 4 parts of 32 ml ethylene glycol solution and add them to 4 50 ml centrifuge tubes respectively, and mark them as A, B, C, D, and then add them to the centrifuge tube A sequentially under the condition of rapid stirring (800 rpm). Add 7.2 ml deionized water, 0.1 ml 4 mol / L zinc nitrate aqueous solution, 0.2 ml 10 mol / L sodium hydroxide aqueous solution, 0.5 ml 2 mol / L sodium chloride aqueous solution; add 4.5 ml deionized Water, 1 mL 4 mol / L zinc nitrate aqueous solution, 2 mL 10 mol / L sodium hydroxide aqueous solution, 0.5 mL 2 mol / L sodium chloride aqueous solution; add 1.5 mL deionized water, 2 mL 4 / L zinc nitrate aqueous solution, 4 ml 10 mol / L sodium hydroxide aqueous solution, 0.5 ml 2 mol / L sodium chloride aqueous solution; add 6 ml 10 mol / L sodium hydroxide aqueous solution, 1.5 ml 8 mol / L sodium hydroxide aqueous solution to centrifuge tube D 1...

Embodiment 3

[0034] Preparation of High Specific Surface Area Mesoporous ZnO Nanoclusters in Mixed Solutions with Different Volume Ratio of Ethylene Glycol and Water

[0035] Take four 50ml centrifuge tubes and mark them as A, B, C, D respectively, then add 34ml ethylene glycol, 4ml deionized water, 0.5 ml 4 mol / L zinc nitrate aqueous solution, 1 ml 10 mol / L sodium hydroxide aqueous solution, 0.5 ml 2 mol / L sodium chloride aqueous solution; add 32 ml ethylene glycol, 6 ml deionized water, 0.5 ml 4 mol / L zinc nitrate aqueous solution, 1 ml 10 mol / L sodium hydroxide aqueous solution, 0.5 ml 2 mol / L sodium chloride aqueous solution; add 30 ml ethylene glycol, 8 ml deionized water, 0.5 ml 4 mol / L zinc nitrate aqueous solution, 1 ml 10 mol / L sodium hydroxide aqueous solution, 0.5 ml 2 mol / L sodium chloride aqueous solution; add 24 ml ethylene glycol, 14 ml deionized water, 0.5 milliliters of 4 moles / liter zinc nitrate aqueous solution, 1 milliliter of 10 moles / liter sodium hydroxide aqueous so...

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Abstract

The invention relates to a high specific surface area mesoporous zinc oxide nano-cluster and a preparation method thereof. The obtained mesoporous zinc oxide nano-cluster is characterized by being formed by assembling and stacking hollow nanoparticles with the scale of 3-5 nm and the wall thickness of 1-2nm, and has the characteristics of high specific surface area, excellent photocatalytic performance and the like. The preparation method comprises the following steps: (1) mixing and stirring deionized water and ethylene glycol solution so as to obtain a mixed solution of ethylene glycol and water; (2) adding zinc nitrate, sodium hydroxide and sodium chloride aqueous solution into the mixed solution of ethylene glycol and water under rapid stirring conditions, and obtaining a reaction precursor solution for preparing the mesoporous zinc oxide nano-cluster; (3) reacting the reaction precursor solution for 1-10 hours while stirring at a room temperature, performing high-speed centrifugal separation and ultrasonic cleaning, drying, and calcining, so as to obtain the mesoporous zinc oxide nano-cluster. The high specific surface area mesoporous zinc oxide nano-cluster disclosed by the invention has important application values on aspects of photocatalytic degradation, drug delivery, bacteria resistance, environmental governance and protection and the like.

Description

technical field [0001] The invention relates to a high specific surface area mesoporous zinc oxide nanocluster formed by assembling and stacking hollow zinc oxide nanoparticles and a preparation method thereof. Background technique [0002] As an important functional oxide semiconductor, ZnO not only has unique physical and chemical properties and good biocompatibility, but also has a large band gap (3.37 eV) and exciton binding energy (60 meV) at room temperature. These characteristics make it have important application value and broad application prospects in many aspects such as photocatalytic pollutant degradation, photocatalytic hydrogen production, solar cells, antibacterial disinfection, drug delivery, environmental governance, gas sensing, photoelectric devices, etc. . Therefore, in recent years, people have made a lot of attempts and efforts to control the synthesis of zinc oxide nanomaterials with different morphologies and structures, and developed hydrothermal m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y40/00
CPCC01G9/02C01P2002/72C01P2002/84C01P2004/01C01P2004/04C01P2004/45C01P2006/12C01P2006/16
Inventor 韦云威李村成姜春雪韩晓楠徐波
Owner UNIV OF JINAN
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