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Metal nanowire network/mesoporous silica core-shell structure catalyst preparation method

A technology of mesoporous silica and core-shell structure, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve complex preparation steps and difficult large-scale Commercial synthesis and other issues, to achieve the effect of simple operation and improved stability

Active Publication Date: 2015-06-17
ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, the above method has improved the stability of the catalyst to a certain extent, but there are still problems such as complicated preparation steps and difficulty in large-scale commercial synthesis.

Method used

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  • Metal nanowire network/mesoporous silica core-shell structure catalyst preparation method
  • Metal nanowire network/mesoporous silica core-shell structure catalyst preparation method
  • Metal nanowire network/mesoporous silica core-shell structure catalyst preparation method

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Experimental program
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Embodiment 1

[0040] Dissolve 145.78mg of cetyltrimethylammonium bromide in 10mL of chloroform, then add 10mL of 20mmol / L K 2 PtCl 4 Aqueous solution, stirring and reacting at 25°C for 2 hours, standing still, separating and removing the upper aqueous phase, then adding 90mL of deionized water, and adding 10mL of 300mmol / L NaBH at 1600 rpm 4 Aqueous solution, reacted for 5 minutes, finally added ammonia water to adjust the pH value to 10, and 144 μL tetraethyl orthosilicate, reacted for 1 hour at 35 ° C, transferred to a stainless steel reaction kettle with a polytetrafluoroethylene liner, in Crystallize at 100°C for 72 hours, wash, dry and calcinate to obtain a metal nanowire network / mesoporous silica core-shell structure catalyst.

[0041] The schematic diagram of this method is shown in figure 1 shown.

[0042] Such as figure 2 , compared with the sample without ethyl orthosilicate, the diameter of the wire mesh structure increased from 2nm to 3nm, indicating that a 0.5nm thick silico...

Embodiment 2

[0046] Embodiment 2: surfactant kind

[0047] Dissolve 115.35 mg of sodium cetyl sulfonate in 10 mL of chloroform, and then add 10 mL of 20 mmol / L K 2 PtCl 4 Aqueous solution, stirring and reacting at 25°C for 2 hours, standing still, separating and removing the upper aqueous phase, then adding 90mL of deionized water, and adding 10mL of 300mmol / L NaBH at 1600 rpm 4 Aqueous solution, reacted for 5 minutes, finally added ammonia water to adjust the pH value to 10, and 144 μL tetraethyl orthosilicate, reacted for 1 hour at 35 ° C, transferred to a stainless steel reaction kettle with a polytetrafluoroethylene liner, in Crystallize at 100°C for 72 hours, wash, dry and calcinate to obtain a metal nanowire network / mesoporous silica core-shell structure catalyst.

Embodiment 3

[0048] Embodiment 3: types of hydrophobic solvents

[0049] Dissolve 145.78mg of cetyltrimethylammonium bromide in 10mL of toluene, then add 10mL of 20mmol / L K 2 PtCl 4 Aqueous solution, stirring and reacting at 25°C for 2 hours, standing still, separating and removing the upper aqueous phase, then adding 90mL of deionized water, and adding 10mL of 300mmol / L NaBH at 1600 rpm 4 Aqueous solution, reacted for 5 minutes, finally added ammonia water to adjust the pH value to 10, and 144 μL tetraethyl orthosilicate, reacted for 1 hour at 35 ° C, transferred to a stainless steel reaction kettle with a polytetrafluoroethylene liner, in Crystallize at 100°C for 72 hours, wash, dry and calcinate to obtain a metal nanowire network / mesoporous silica core-shell structure catalyst.

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Abstract

The present invention relates to a preparation method, structure characteristics and applications of a metal nanowire network / mesoporous silica core-shell structure catalyst. The preparation method comprises: dissolving a surfactant in a hydrophobic solvent, adding a metal salt aqueous solution and a reducing agent, finally adding an orthosilicate compound, transferring to a stainless steel reaction kettle to crystallize, and carrying out washing, drying and calcining to obtain the metal nanowire network / mesoporous silica core-shell structure catalyst. With the preparation method of the present invention, the metal nanowire network catalyst having different metal composition and different mesoporous silica thicknesses can be obtained, the method has characteristics of simple operation, rapid reaction, easy surfactant removing, good stability, and easy synthesis amplifying, and the prepared nanometer catalyst can be used for the fields of petrochemical industry, pollution control, fuel cells and the like.

Description

technical field [0001] The invention belongs to the fields of petrochemical industry, pollution control and fuel cell, and specifically relates to a preparation method, structural characteristics and application of a metal wire mesh / mesoporous silica core-shell structure catalyst. Background technique [0002] Metal catalysts are widely used in traditional petrochemical industry (catalytic reforming), pollution control and fuel cells. However, such catalysts are prone to particle aggregation and deactivation under actual reaction conditions, so the stability of such catalysts is usually poor. In response to this problem, researchers at home and abroad have carried out a lot of fruitful work in this field. [0003] Xia et al. used electrospinning technology to first prepare polystyrene fibers, and loaded platinum nanoparticles on the surface, and then grew CeO on the surface. 2 , and finally the polystyrene was removed to obtain a series of platinum nanoparticles supported ...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/46B01J23/52B01J35/02
Inventor 宋玉江李书双王莹
Owner ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
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