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Bi-base-mesoporous silica composite material and preparing method and application thereof

A technology of mesoporous silica and composite materials, applied in the fields of photocatalytic material technology and environmental sanitation analysis, can solve the problems of complex synthesis, high price and high detection cost of multi-layer carbon nanotubes, and achieve excellent photocatalytic activity and electrochemical performance. The effect of improving photocatalytic activity and easy control of conditions

Inactive Publication Date: 2017-08-25
NANJING MEDICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] These methods have good sensitivity for measuring lead and a wide range of linear response concentration. However, methods such as atomic absorption need to use relatively expensive large-scale instruments, and the detection cost is high. At the same time, the analysis time is long, and professional personnel are required to carry out analysis and detection in the laboratory. , which is not conducive to the on-site detection of heavy metal lead; the sample pretreatment process of other detection methods is relatively complicated, and the detection sensitivity needs to be further improved to meet the requirements of the sanitary standard for drinking water (GB5749 2006); the fifth method uses mercury as a modification material for human body There are safety hazards in both health and environmental protection; biosensor methods need to utilize the biological characteristics of bioactive molecules, which have strict environmental requirements and need to maintain their activity during storage, transportation, and testing, thus limiting their application
The synthesis of multilayer carbon nanotubes reported in the literature is complex and relatively expensive. The production of screen-printed electrodes requires supporting equipment and high cost. At present, some technologies are not yet mature and cannot be widely used.

Method used

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  • Bi-base-mesoporous silica composite material and preparing method and application thereof
  • Bi-base-mesoporous silica composite material and preparing method and application thereof
  • Bi-base-mesoporous silica composite material and preparing method and application thereof

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Effect test

Embodiment 1

[0043] 1). Add 2mol Bi(NO 3 ) 3 ·5H 2 Dissolve O in ethylene glycol solution, heat and stir at 30°C to dissolve, add 0.2mol KIT-6, continue heating and stirring for 0.5 hour, add 20mol NaCl solid, stir and mix well.

[0044] 2). Transfer the suspension obtained in step 1 into an autoclave and heat it with water at 150°C for 10 hours, cool and centrifuge to obtain a sediment, wash it twice with ultrapure water, and dry to obtain the new material BiOCl-KIT-6.

[0045] The scanning electron microscope image of the new material BiOCl-KIT-6 is as follows figure 1 As shown, it can be seen from the figure that the BiOCl-KIT-6 composite material is a string structure composed of BiOCl microspheres, with a size of about 5-10 microns. The transmission electron microscope image of the obtained product is as figure 2 As shown, it can be clearly seen from the figure that the BiOCl-KIT-6 composite material has a typical mesoporous network structure of mesoporous silica (KIT-6) and a cr...

Embodiment 2

[0053] 1). Add 1.5mol BiCl 3 Dissolve in ethylene glycol solution, heat and stir at 15°C to dissolve, add 0.75mol KIT-6, continue heating and stirring for 2 hours, add 1.5mol NaCl solid, stir and mix evenly.

[0054] 2). Transfer the suspension obtained in step 1 into an autoclave and heat it with water at 200°C for 5 hours, cool and centrifuge to obtain a sediment, wash 5 times with ultrapure water, and dry to obtain the new material BiOCl-KIT-6.

[0055] The new material BiOCl-KIT-6 is a string structure composed of BiOCl microspheres, with a size of about 5 microns; it has the typical mesoporous network structure of mesoporous silicon oxide (KIT-6) and the crystal structure of BiOCl, It can be directly proved that the obtained product is BiOCl-KIT-6. KIT-6 was used as a cross-linking agent to link BiOCl microspheres into strings.

[0056] 3). Before grinding, place the glassy carbon electrode in water to ultrasonically remove the dirt on the electrode surface to ensure th...

Embodiment 3

[0062] 1). Add 1.6mol Bi(NO 3 ) 3 Dissolve in ethylene glycol solution, heat and stir at 20°C to dissolve, add 0.2mol KIT-6, continue heating and stirring for 2 hours, add 10mol NaCl solid, stir and mix evenly.

[0063] 2). Transfer the suspension obtained in step 1 into an autoclave and heat it with water at 170°C for 6 hours, cool and centrifuge to obtain a sediment, wash with ultrapure water for 3 times, and dry to obtain the new material BiOCl-KIT-6.

[0064] The new material BiOCl-KIT-6 is a string structure composed of BiOCl microspheres with a size of about 10 microns; it has the typical mesoporous network structure of mesoporous silicon oxide (KIT-6) and the crystal structure of BiOCl, It can be directly proved that the obtained product is BiOCl-KIT-6. KIT-6 was used as a cross-linking agent to link BiOCl microspheres into strings.

[0065] 3). Weigh 0.03g of KIT-6, BiOCl and the BiOCl-KIT-6 composite material obtained in step 2 respectively in a test tube, add 30ml...

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Abstract

The invention relates to a BiOCl-KIT-6BiOCl-KIT-6 composite material and a preparing method and application thereof, and belongs to the field of photocatalytic material technologies and environmental health analysis. According to the BiOCl-KIT-6BiOCl-KIT-6 composite material and the preparing method and application thereof, the adopted material is a novel environment-friendly material obtained in the mode that mesoporous silica KIT-6 and BiOCl are subjected to in-situ compositing with the hydrothermal synthesis method, namely, BiOCl-KIT-6; the preparing method includes the steps that the mesoporous silica KIT-6 is synthesized; the BiOCl is synthesized on the surface of the KIT-6 in an in-situ mode, and the composite material of a string-shaped special structure is obtained. The photocatalytic activity and the electrochemical activity are improved, and the BiOCl-KIT-6BiOCl-KIT-6 composite material and the preparing method and application thereof have quite-large application prospects in the aspects of degrading organic dye and detecting heavy metal.

Description

technical field [0001] The present invention relates to a bismuth-based mesoporous silicon oxide composite material and its preparation method and application, in particular to a preparation method of BiOCl-KIT-6 and its application in photocatalysis and electrochemical detection of heavy metals, belonging to photocatalysis Fields of materials technology and environmental health analysis. Background technique [0002] In 1992, Kresge and Beck of Mobil Corporation in the United States first synthesized the MCM-41 ordered mesoporous silica material. Since then, researchers have successively synthesized a series of other ordered mesoporous silica materials with different spatial structures. Among them, mesoporous silica (KIT-6) has a narrow pore size distribution, regular pore structure, large specific surface area, and low cost. It has certain advantages in stability, hydrophilicity and catalytic activity. field has important application value. [0003] Bismuth (Bi) has an a...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/36G01N27/48G01N21/31
CPCG01N27/308G01N21/31G01N27/36G01N27/48
Inventor 陈进宋翌琰
Owner NANJING MEDICAL UNIV