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A kind of preparation method and application of zno porous material with multi-core-shell structure

A technology of porous material and shell structure, applied in the analysis of materials, material resistance, microsphere preparation, etc., can solve the problems of poor selectivity, achieve the effects of increased specific surface area, low selectivity sensitivity, and enhanced gas permeability

Active Publication Date: 2020-06-09
NANJING TECH UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the lack of selectivity of current ZnO sensing materials, the purpose of the present invention is to provide a preparation method and application of a multi-core-shell structure ZnO porous material. The preparation method adopts a very simple one-step hydrothermal method and no template self-assembly growth The construction of multi-core-shell porous ZnO microspheres overcomes the disadvantage of poor selectivity of ZnO, and in hydrogen (H 2 ), methane (CH 4 ), propane (C 3 h 8 ), carbon monoxide (CO), carbon dioxide (CO 2 ), Methanol (CH 3 OH), acetone (CH 3 COCH 3 ) among these gases, it has excellent selectivity and high sensitivity to acetone

Method used

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  • A kind of preparation method and application of zno porous material with multi-core-shell structure
  • A kind of preparation method and application of zno porous material with multi-core-shell structure
  • A kind of preparation method and application of zno porous material with multi-core-shell structure

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Embodiment 1

[0021] Embodiment 1 The mol ratio of zinc acetate and salicylic acid is 1.25:1

[0022] A preparation method of a ZnO porous material with a multi-core-shell structure, comprising the following steps:

[0023] Step 1, 0.137g zinc acetate dihydrate (Zn(AC) 2 2H 2 O) be dissolved in 15mL methanol solution, after magnetic stirring for 10min, ultrasonic treatment for 10min, then continue magnetic stirring for 10min, as solution A;

[0024] Step 2, 0.069g salicylic acid (C 7 h 6 o 3 ) was dissolved in methanol solution, magnetically stirred for 20min, as solution B;

[0025] Step 3, mix solution A and solution B, stir magnetically for 10 minutes, add 20 mg of polyvinylpyrrolidone (PVP) and continue stirring for 10 minutes, then transfer the mixed solution to a 50mL reaction kettle, and place the reaction kettle in an oven at 160°C for reaction After 24 hours, the reaction product was centrifuged and washed with ethanol and water for 3 times, and then dried in an oven at 60°C ...

Embodiment 2

[0027] Example 2 The molar ratio of zinc acetate and salicylic acid is 1.5:0.75

[0028] A preparation method of a ZnO porous material with a multi-core-shell structure, comprising the following steps:

[0029] Step 1, 0.164g zinc acetate dihydrate (Zn(AC) 2 2H 2 O) be dissolved in 15mL methanol solution, after magnetic stirring for 10min, ultrasonic treatment for 10min, then continue magnetic stirring for 10min, as solution A;

[0030] Step 2, 0.052g salicylic acid (C 7 h 6 o 3 ) was dissolved in methanol solution, magnetically stirred for 20min, as solution B;

[0031] Step 3, mix solution A and solution B, stir magnetically for 10 minutes, add 20 mg of polyvinylpyrrolidone (PVP) and continue stirring for 10 minutes, then transfer the mixed solution to a 50mL reaction kettle, and place the reaction kettle in an oven at 160°C for reaction After 24 hours, the reaction product was centrifuged and washed with ethanol and water for 3 times, and then dried in an oven at 60°C...

Embodiment 3

[0033] Example 3 The molar ratio of zinc acetate and salicylic acid is 1:1.25

[0034] A preparation method of a ZnO porous material with a multi-core-shell structure, comprising the following steps:

[0035] Step 1, 0.109g zinc acetate dihydrate (Zn(AC) 2 2H 2 O) be dissolved in 15mL methanol solution, after magnetic stirring for 10min, ultrasonic treatment for 10min, then continue magnetic stirring for 10min, as solution A;

[0036] Step 2, 0.086g salicylic acid (C 7 h 6 o 3 ) was dissolved in methanol solution, magnetically stirred for 20min, as solution B;

[0037] Step 3, mix solution A and solution B, stir magnetically for 10 minutes, add 20 mg of polyvinylpyrrolidone (PVP) and continue stirring for 10 minutes, then transfer the mixed solution to a 50mL reaction kettle, and place the reaction kettle in an oven at 160°C for reaction After 24 hours, the reaction product was centrifuged and washed with ethanol and water for 3 times, and then dried in an oven at 60°C f...

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Abstract

The invention discloses a preparation method and application of a ZnO porous material adopting a multi-core-shell structure. The preparation method comprises the following steps: 1, dissolving zinc acetate dehydrate in a methanol solution, magnetically stirring for 10min, performing ultrasonic treatment for 10min, and then continuing to magnetically stir for 10min to obtain a solution A; 2, dissolving salicylic acid in a methanol solution, and magnetically stirring for 20min to obtain a solution B; 3, mixing the solution A and the solution B, magnetically stirring for 10min, then transferringa mixed solution to a reaction kettle, and placing the mixed solution together with the reaction kettle in a drying oven, reacting for 24 hours at 160 DEG, washing a reaction product for three times by using ethanol and water respectively, and then drying at 60 DEG C for 12 hours in the drying oven to obtain pale yellow powder; 4, calcinating the pale yellow powder for 2h to obtain the ZnO porousmaterial adopting the multi-core-shell structure. The preparation method is simple, and the obtained ZnO porous material adopting the multi-core-shell structure is wide in application field.

Description

technical field [0001] The invention belongs to the technical field of gas-sensitive materials, and in particular relates to a preparation method and application of a ZnO porous material with a multi-core-shell structure. Background technique [0002] Human exhaled breath contains thousands of different volatile organic compounds (VOCs) from the body's metabolic processes, and in diabetics, the body produces excess ketones, such as acetone, because the body uses fat instead of glucose to produce The energy is then exhaled during the breath. Acetone has been successfully used as a biomarker for diabetes, especially type 1 diabetes. At present, the concentration of acetone can be quantitatively analyzed by gas analysis technology to diagnose diabetes in patients. Many studies have reported the use of gas chromatography (GC-MS), Ion Mobility Spectrometry (IMS), Selected Ion Flow Tube Mass Spectrometry (SIFT-MS) and Proton Transfer-Mass Spectrometry (PTR-MS). Although these te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B01J13/02G01N27/12
CPCB01J13/02C01G9/02C01P2004/32C01P2004/61G01N27/125
Inventor 章伟闵信杰杜薇全文静胡烨伟胡雪峰
Owner NANJING TECH UNIV
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