A green and efficient synthesis method of copper-doped sba-15 mesoporous molecular sieve material

The technology of a mesoporous molecular sieve and a synthesis method is applied in the field of green and efficient synthesis of copper-doped SBA-15 mesoporous molecular sieve materials, which can solve the problems of difficult synthesis, short time and high efficiency, and achieve the effect of high synthesis efficiency and short time.

Active Publication Date: 2021-05-21
BAOJI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Summarizing the above method, it is found that the prior art has the following defects: (1) it is not easy to synthesize a single copper-doped SBA-15, because under strongly acidic conditions, the metal mainly exists in the form of cations, and it is difficult to form Cu-O-Si with Si (2) the reaction of the above-mentioned synthetic copper-doped SBA-15 is carried out in an acidic environment, and the follow-up waste liquid needs to be treated, which causes cost rise and is easy to cause environmental pollution; (3) the above-mentioned method is time-consuming Long, no less than 80h, there are defects of high energy consumption and low efficiency
[0005] By searching the existing technologies at home and abroad, there is no report on the synthesis method of copper-doped SBA-15 mesoporous molecular sieve materials under acid-free and alkali-free conditions, with low energy consumption, short time and high efficiency.

Method used

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  • A green and efficient synthesis method of copper-doped sba-15 mesoporous molecular sieve material
  • A green and efficient synthesis method of copper-doped sba-15 mesoporous molecular sieve material
  • A green and efficient synthesis method of copper-doped sba-15 mesoporous molecular sieve material

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Experimental program
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Effect test

Embodiment 1

[0044] 1. Copper-doped SBA-15 mesoporous molecular sieve material preparation:

[0045] Step 1: Add 0.05gNa 2 S 2 o 8 Dissolve in 15mL of water, add 4.3g of TEOS into a quartz tube, and stir for 1 hour under the irradiation of a UV lamp of 100W until the solution is clear without stratification to obtain M solution;

[0046] Step 2: Dissolve 2g P123 in 85mL water, stir for 4 hours until completely dissolved, then add 0.25g Cu(Ac) 2 ·H 2 O is stirred to obtain N solution;

[0047] Step 3: Mix and stir the M solution and the N solution, and form a blue suspension in a water bath at 40°C for 8 minutes, then react for 8 hours, transfer the reaction product and mother liquor to polytetrafluoroethylene for crystallization at 80°C for 12 hours, and filter and wash after cooling , dried, and calcined at 550°C for 6h to obtain a light blue copper-doped SBA-15 mesoporous molecular sieve material.

[0048] 2. Various characterizations of copper-doped SBA-15 mesoporous molecular sie...

Embodiment 2

[0064] Step 1: Add 0.01g Na 2 S 2 o 8 Dissolve in 15mL water, add 4.3g TEOS into a quartz tube, and stir for 40min under the irradiation of a UV lamp of 500W until the solution becomes clear and no stratification occurs to obtain the M solution;

[0065] Step 2: Dissolve 1.8g P123 in 85mL water, stir for 4 hours until completely dissolved, then add 0.6g Cu(Ac) 2 ·H 2 O is stirred to obtain N solution;

[0066] Step 3: Mix and stir the M solution and the N solution, form a suspension in a water bath at 25°C for 7 minutes, react for 12 hours, transfer the reaction product and mother liquor to polytetrafluoroethylene for crystallization at 110°C for 8 hours, wash with suction after cooling, and dry. Calcined at 550°C for 6h to obtain blue copper-doped SBA-15 mesoporous molecular sieve material.

[0067] The product was characterized by XRD, SEM, TEM, EDS, solid ultraviolet, physical adsorption and chemical adsorption analysis, which indicated that the copper-doped SBA-15 mes...

Embodiment 3

[0071] Step 1: Add 0.03g Na 2 S 2 o 8 Dissolve in 15mL of water, add 4.3g of TEOS into a quartz tube, and stir for 50min under the irradiation of a UV lamp of 300W until the solution is clear without stratification to obtain M solution;

[0072] Step 2: Dissolve 1.9g P123 in 85mL water, stir for 4 hours until completely dissolved, then add 1.0g Cu(Ac) 2 ·H 2 O is stirred to obtain N solution;

[0073] Step 3: Mix and stir the M solution and the N solution, form a suspension in a water bath at 35°C for 6 minutes, react for 10 hours, transfer the reaction product and the mother liquor to polytetrafluoroethylene at 100°C for crystallization for 10 hours, after cooling, filter, wash, and dry. Calcined at 550℃ for 6h to obtain dark blue copper-doped SBA-15 mesoporous molecular sieve material.

[0074] The product was characterized by XRD, SEM, TEM, EDS, solid ultraviolet, physical adsorption and chemical adsorption analysis, which indicated that the copper-doped SBA-15 mesopor...

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Abstract

The invention discloses a green and high-efficiency synthesis method of copper-doped SBA-15 mesoporous molecular sieve material. The method comprises the following steps: 1) adding Na 2 S 2 o 8 Dissolve in water, add TEOS and stir, and irradiate with ultraviolet light until the solution is clear to obtain M solution; 2) Dissolve P123 in water, add copper salt and stir to obtain N solution; 3) Mix M solution and N solution evenly to form a suspension Continue the reaction, transfer the reaction product and mother liquor to polytetrafluoroethylene for hydrothermal crystallization, filter, dry and calcinate to obtain a blue product after cooling. The present invention shortens the traditional reaction time of 48 hours to 16-24 hours, so that the energy consumption and time are less than the traditional method, and the efficiency is higher. At the same time, the whole reaction is carried out in a neutral environment, and the reaction process is green and pollution-free.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a green and efficient synthesis method of copper-doped SBA-15 mesoporous molecular sieve materials. Background technique [0002] SBA-15 mesoporous molecular sieve is often used in related fields such as catalysis, adsorption separation and ion exchange due to its regular pore structure, extremely high specific surface area, and narrow pore size distribution. However, the unactivated SBA-15 lacks chemical activity, and its application in the chemical industry is very limited. A convenient way to activate SBA-15 is to dope other atoms in its skeleton structure, so that it has ion exchange capacity, high density of acid centers, and various catalytic activities. In particular, copper-doped SBA-15 can generate high-density acid centers, exhibit good catalytic activity, and has a broad application prospect in the field of catalysis. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/08C01B39/46
CPCC01B39/08C01B39/46C01P2002/72C01P2002/80C01P2002/84C01P2004/04C01P2006/12C01P2006/17
Inventor 罗小林苗康康冯国栋肖珍裴霏潘哲
Owner BAOJI UNIV OF ARTS & SCI
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