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Preparation method of HEPES (hydroxyethylpiperazine ethane sulfonic acid) molecule guided porous zinc oxide microspheres

A technology of porous zinc oxide and microspheres, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of increasing process complexity and environmental pollution, and achieve the effects of low price, good repeatability and convenient operation

Active Publication Date: 2014-01-01
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of porous zinc oxide microspheres by the solvothermal method often requires the addition of templates or porogens, such as the porous layered zinc oxide reported in The Journal of Physical Chemistry C, 2011, 115, 7145-7152 and Chinese patent CN200910259658.3 The preparation method of the spheres is all samples prepared by the template method. After the reaction is completed, these samples need further post-processing to remove the template agent, which increases the complexity of the process and environmental pollution.

Method used

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  • Preparation method of HEPES (hydroxyethylpiperazine ethane sulfonic acid) molecule guided porous zinc oxide microspheres
  • Preparation method of HEPES (hydroxyethylpiperazine ethane sulfonic acid) molecule guided porous zinc oxide microspheres
  • Preparation method of HEPES (hydroxyethylpiperazine ethane sulfonic acid) molecule guided porous zinc oxide microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 A preparation method for porous zinc oxide microspheres, comprising the steps of:

[0024] Dissolve 2 mmol of zinc acetate in 30 mL of triethylene glycol (TEG), sonicate for 10 min to completely disperse the zinc acetate, then add 5 mmol of hydroxyethylpiperazineethanesulfonic acid (HEPES) and place the reaction mixture in the liner 100 mL polytetrafluoroethylene stainless steel autoclave, at 150 o C under reaction for 6 hours; after centrifugal washing to remove residual solvent and HEPES, the product was placed at 60 o C and dried for 24 hours, after cooling, porous zinc oxide microspheres with high specific surface area can be obtained. The specific surface area of ​​this sample is 51.9 m 2 / g, the average pore diameter is 30 nm.

[0025] figure 1 It is the diffraction pattern of the sample of Example 1 obtained by Bruker axs D8 type X-ray diffraction analyzer (XRD). It can be seen from the spectrum that the diffraction peaks of the spectrum corresp...

Embodiment 2

[0029] Example 2 A preparation method for porous zinc oxide microspheres, comprising the steps of:

[0030] Dissolve 4 mmol of zinc acetate in 50 mL of diethylene glycol (DEG), sonicate for 10 min to completely dissolve the zinc acetate, then add 8 mmol of hydroxyethylpiperazineethanesulfonic acid (HEPES) and place the reaction mixture in the liner 100 mL polytetrafluoroethylene stainless steel autoclave, at 150 o Reaction at C temperature for 15 hours; after centrifugal washing to remove residual solvent and HEPES, the product was placed at 60 o C and dried for 24 hours, after cooling, porous zinc oxide microspheres with high specific surface area can be obtained. The specific surface area of ​​this sample is 63.1 m 2 / g, with an average pore size of 5 nm.

[0031] Figure 5 It is a topography diagram of the sample of Example 2 observed by a Hitachi S4800 scanning electron microscope (SEM). It can be seen from the figure that the synthesized zinc oxide is spherical wi...

Embodiment 3

[0032] Example 3 A preparation method for porous zinc oxide microspheres, comprising the steps of:

[0033] Dissolve 3 mmol of zinc acetate in 40 mL of dimethylformamide (DMF), sonicate for 10 min to completely dissolve the zinc acetate, then add 6 mmol of hydroxyethylpiperazineethanesulfonic acid (HEPES), and place the reaction mixture in In a stainless steel autoclave lined with 100 mL polytetrafluoroethylene, at 150 o Reaction at C temperature for 12 hours; after centrifugal washing to remove residual solvent and HEPES, the product was placed at 60 o C and dried for 24 hours, after cooling, porous zinc oxide microspheres with high specific surface area can be obtained. The specific surface area of ​​this sample is 56.9 m 2 / g, the average pore diameter is 32 nm.

[0034] Image 6 It is a topography diagram of the sample of Example 3 observed by a Hitachi S4800 scanning electron microscope (SEM). It can be seen from the figure that the synthesized zinc oxide is spheri...

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Abstract

The invention discloses a preparation method of HEPES (hydroxyethylpiperazine ethane sulfonic acid) molecule guided porous zinc oxide microspheres. The preparation method comprises the specific experimental steps of taking HEPES molecules as a guide agent and organic zinc salt as a zinc source, reacting under a solvent heat condition at 150 DEG C, performing centrifugal washing to remove the residual solvent and HEPES modules, and drying the product to obtain porous zinc oxide microspheres with high specific areas. According to the preparation method disclosed by the invention, nontoxic HEPES molecules are used, the synthetic temperature is low, the operation is simple, and the repeatability is good. The prepared porous zinc oxide microspheres have the advantages of uniform size, multistage pore structure, large specific area and the like, and can be used as a photo-catalyst and a gas-sensitive element.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to a preparation method of porous zinc oxide microspheres guided by HEPES molecules. Background technique [0002] As a II-VI semiconductor compound, zinc oxide has a band gap of 3.37 eV and an exciton binding energy of 60 meV. Due to its special piezoelectric and optical properties, it is widely used in many fields, such as solar cells, sensors, piezoelectric Sensitive resistors, piezoelectric materials, antibacterial agents and photocatalytic fields, etc. The morphology and size of zinc oxide have an important impact on its performance and application, especially porous zinc oxide microspheres, due to their low density, high specific surface and other properties, have shown great promise in the fields of catalysts, gas sensors, and drug delivery. Broad application prospects. At present, different methods have been reported to synthesize porous ZnO microspheres, such as high-temp...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor 陈嵘李琴杨浩吕中
Owner WUHAN INSTITUTE OF TECHNOLOGY
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