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a kind of sio 2 ‑mos 2 Mesoporous composite nanomaterials and their preparation methods and applications

A composite nanomaterial, mesoporous technology, applied in chemical instruments and methods, lubricating compositions, chemical/physical processes, etc., to achieve the effects of less by-products, good photocatalytic performance, and simple process

Active Publication Date: 2018-01-16
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For SiO 2 -MoS 2 The properties of mesoporous composite nanomaterials and their preparation methods have not been reported in the relevant literature so far.

Method used

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  • a kind of sio <sub>2</sub> ‑mos <sub>2</sub> Mesoporous composite nanomaterials and their preparation methods and applications
  • a kind of sio <sub>2</sub> ‑mos <sub>2</sub> Mesoporous composite nanomaterials and their preparation methods and applications
  • a kind of sio <sub>2</sub> ‑mos <sub>2</sub> Mesoporous composite nanomaterials and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0029] Preparation Example 1: Preparation of SiO 2 -MoS 2 Mesoporous Composite Nanomaterials

[0030] (1) Dissolve the soluble molybdate in the acetic acid-distilled water system, stir magnetically at room temperature for 2 minutes to fully dissolve it to obtain a colorless solution a, and the molar ratio of acetic acid to distilled water is 0.25:15. figure 1 It is an optical photograph of the reaction precursor solution prepared at room temperature. It can be seen that the solution is yellow and has Tyndall effect, indicating that the obtained solution a is a colloidal solution.

[0031] (2) Slowly add tetraethyl orthosilicate (TEOS) into solution a, and continue magnetic stirring for 2 minutes to obtain yellow solution b. The pH value of the control system is 3, the molar ratio of soluble molybdate to tetraethyl orthosilicate (TEOS) is 0.5:10, and the volume ratio of tetraethyl orthosilicate (TEOS) to the distilled water added in the previous step is 1:10.

[0032] (3) Pu...

preparation Embodiment 2

[0038] Preparation Example 2: Preparation of SiO 2 -MoS 2 Mesoporous Composite Nanomaterials

[0039] (1) Dissolve the soluble molybdate in the acetic acid-distilled water system, stir magnetically at room temperature for 1 minute to fully dissolve to obtain a colorless solution a, and the molar ratio of acetic acid to distilled water is 0.1:5.

[0040] (2) Slowly add tetraethyl orthosilicate (TEOS) into solution a, and continue magnetic stirring for 1 minute to obtain yellow solution b. The pH of the control system is 4, the molar ratio of soluble molybdate to tetraethyl orthosilicate (TEOS) is 0.1:10, and the volume ratio of tetraethyl orthosilicate (TEOS) to the distilled water added in the previous step is 1:10.

[0041] (3) Put the solution b into a blast drying oven, and heat-treat at 60°C for 30 hours.

[0042] (4) First, grind the gel block c into fine powder (the particle size of the fine powder is 0.5-10 μm). Then put the fine gel powder into a reaction vessel fi...

preparation Embodiment 3

[0044] Preparation Example 3: Preparation of SiO 2 -MoS 2 Mesoporous Composite Nanomaterials

[0045] (1) Dissolve the soluble molybdate in the acetic acid-distilled water system, stir magnetically at room temperature for 3 minutes to fully dissolve it to obtain a colorless solution a, and the molar ratio of acetic acid to distilled water is 0.5:25.

[0046] (2) Slowly add tetraethyl orthosilicate (TEOS) into solution a, and continue magnetic stirring for 3 minutes to obtain yellow solution b. The pH value of the control system is 5.5, the molar ratio of soluble molybdate to tetraethyl orthosilicate (TEOS) is 1:10, and the volume ratio of tetraethyl orthosilicate (TEOS) to the distilled water added in the previous step is 1:10.

[0047] (3) Put solution b into a blast drying oven, and heat-treat at 100°C for 6 hours.

[0048] (4) First, grind the gel block c into fine powder (the particle size of the fine powder is 0.5-10 μm). Then put the gel fine powder into a reaction v...

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Abstract

A SiO 2 ‑MoS 2 A mesoporous composite nanomaterial and its preparation method and application relate to the technical field of mesoporous composite nanomaterials. Flower-like MoS 2 Nanoparticles grown on mesoporous SiO 2 On the substrate, mesoporous SiO 2 The pore diameter of the matrix is ​​5-8nm, and the specific surface area (BET) of the composite nanomaterial is 521m 2 / g. Dissolve the soluble molybdate in the acetic acid-distilled water system, stir at room temperature to obtain a colorless solution a, slowly add tetraethylorthosilicate to the solution a, continue stirring to obtain a yellow solution b, and pass the solution b through The solid gel block c is obtained by heat treatment, the gel block c is ground into fine powder, and put into a reaction vessel filled with excess thiourea aqueous solution for vulcanization treatment. It has good dispersibility, good fluidity and adsorption, excellent photocatalysis and acid resistance, and can be used in mechanical lubrication and photocatalytic degradation of pollutants, etc., and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of mesoporous composite nanomaterials, in particular to a SiO 2 -MoS 2 Mesoporous composite nanomaterials and their preparation methods and applications. Background technique [0002] Mesoporous silica (SiO 2 ) can be used as adsorbent and catalyst due to its stable structure, low cost and high specific surface area, and has important application value in the fields of catalysis, medicine and biology. At present, hydrothermal method and sol-gel method are the current methods for synthesizing mesoporous SiO 2 main method. The product prepared by the hydrothermal method has good thermal stability, high crystallinity, and convenient operation, but the hydrothermal crystallization time is longer. Although the sol-gel synthesis temperature is not high, post-treatment processes such as calcination are required, and the purity of the obtained product is low. [0003] Molybdenum disulfide (MoS 2 ) as a transi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051C02F1/30C10M125/00C10N30/06
Inventor 韩成良沈寿国张凌云姚李胡坤宏
Owner HEFEI UNIV