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Hierarchical pore SiO2 microsphere material as well as preparation method and application thereof

A technology of hierarchical pores and microspheres, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problem of increasing the production cost of hierarchical porous SiO2 and restricting the development of hierarchical porous SiO2 materials. , the problem of high raw material prices, to achieve the effect of facilitating industrial expansion of production, slowing down the rate of hydrolysis, and simple operation

Pending Publication Date: 2021-09-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Hierarchical porous SiO 2 On the one hand, the preparation method of the raw material is expensive and polluted heavily; on the other hand, it requires harsh experimental conditions (high temperature or high pressure), and the synthesis steps are complicated, which improves the performance of multi-level porous SiO. 2 The production cost greatly limits the hierarchical porous SiO 2 material development
Therefore, how to design a route with mild synthesis conditions, simple operation, and favorable industrial production to prepare hierarchically porous SiO with large pore volume, specific surface area, and high thermal stability 2 Microsphere materials still have certain challenges

Method used

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  • Hierarchical pore SiO2 microsphere material as well as preparation method and application thereof
  • Hierarchical pore SiO2 microsphere material as well as preparation method and application thereof
  • Hierarchical pore SiO2 microsphere material as well as preparation method and application thereof

Examples

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preparation example Construction

[0044] Preferably, the hierarchical porous SiO of the present invention 2 The preparation method of microsphere material comprises the following steps:

[0045] S1, the collagen and the surfactant extracted from the tanning solid waste (extracted according to the mature existing extraction method technology) are respectively dissolved in distilled water to obtain the solution A containing collagen and the surfactant containing solution B, and fully stir solution A and solution B at room temperature to obtain mixed solution A;

[0046] S2, add catalyst, alcohol solvent and distilled water into solution C into the mixed solution obtained in step S1, stir to make the catalyst fully hydrolyzed, and obtain mixed solution B; when preparing solution C, the consumption ratio of catalyst, alcohol solvent and distilled water is 1 ~3mL:5mL:10mL.

[0047] S3, the solution D prepared by the silicon source precursor, the pore expander and the alcohol solvent is added dropwise to the mixed...

Embodiment 1

[0055] A Hierarchical Porous SiO 2 The preparation method of microsphere material is as follows:

[0056] Weigh 1.3667g (0.015mol) CTAB and dissolve it in 20mL distilled water, weigh 0.5g (0.001mol) collagen and dissolve it in 15mL distilled water, mix the aqueous solution of CTAB and the aqueous solution of collagen, stir under air for 20min, then add Mixed solution of 0.5mL ammonia water, 5mL distilled water and 10mL ethanol, after stirring for 30min, add 2mL tetraethyl orthosilicate and 10mL ethanol mixed solution, continue stirring for 6h to obtain SiO 2 sol, which will subsequently contain SiO 2 After the sol was washed with alcohol, it was transferred to a petri dish, and aged in an oven at 40°C for 24 hours until the sample was dry to promote the non-metallic SiO 2 solution evaporated self-assembled, the dried SiO 2 The solid microspheres were transferred to a corundum crucible, and calcined at a high temperature in a muffle furnace. The temperature was raised to 550...

Embodiment 2

[0061] The hierarchical porous SiO provided by this embodiment 2 The preparation method of the microsphere material is the same as that of Example 1, except that the amount of mesitylene (TMB) in Example 1 is 0.7 g (the mass ratio of TMB:CTAB is 0.5).

[0062] Example 2 Synthesis of Hierarchical Porous SiO 2 Sample N 2 Adsorption-desorption isotherms and pore size distribution diagrams are shown in Figure 4 shown, from Figure 4 It can be seen that the synthesized SiO 2 It has a wide range of pore distribution (1.9-110nm), and the average pore size of the sample calculated by the BJH method is mainly concentrated at 4.6nm. According to the IUPAC classification, the N of the synthetic sample 2 The adsorption and desorption isotherms are type IV isotherms, and have a H2 hysteresis loop, which represents the mesoporous structure in the sample.

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Abstract

The invention discloses a hierarchical porous SiO2 microsphere material as well as a preparation method and an application thereof, and belongs to the technical field of preparation of hierarchical porous non-metallic oxide microsphere materials. According to the method, a silicon source precursor is used as a raw material, collagen extracted from solid tanning waste is used as a biomass template, a surfactant is used as a structure-directing agent, and the hierarchical porous SiO2 microsphere material is synthesized through a one-pot method under the condition that high-temperature hydrothermal is not needed. The hierarchical pore SiO2 microsphere material with large pore volume, large specific surface area and excellent thermal stability is prepared by the preparation method which is mild in condition, simple to operate and beneficial to industrial production. The hierarchical pore SiO2 microsphere material has good adsorption performance on lysozyme biological macromolecules.

Description

technical field [0001] The invention belongs to the technical field of preparation of multi-level porous non-metal oxide microsphere materials, and relates to a kind of multi-level porous SiO 2 Microsphere material and its preparation method and application. Background technique [0002] The porous microsphere material has a unique pore structure. The adjustable pore size can not only interact with atoms, ions and molecules on its surface, but also realize material transport in the pore structure inside the material. Therefore, in ion exchange, adsorption and catalysis Extensive research has been done in traditional application fields such as In practical applications, materials with single pores (micropores, mesoporous or macropores) have certain limitations. For example, the pore size of microporous materials is too small, which is not conducive to the transmission of substances. Poor thermal stability, the pore structure of macroporous materials is easily damaged, etc. ...

Claims

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Application Information

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IPC IPC(8): C01B33/18B01J20/10B01J20/28B01J20/30
CPCC01B33/18B01J20/103B01J20/28021B01J20/28011C01P2004/62C01P2004/32C01P2006/16C01P2002/72C01P2004/03
Inventor 强涛涛朱润桐
Owner SHAANXI UNIV OF SCI & TECH
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