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Preparation method of composite material of mesoporous carbon-silica loaded nano-moo3 and nano-metal particles

A technology of nano metal particles and composite materials, applied in the field of inorganic nano material preparation, can solve the problems of slow hydrogen transfer catalysis rate of aryl nitro compounds, unconcentrated pore size distribution, complicated preparation process, etc., and achieves high activity and selectivity, operation Simple, easy-to-use effects

Inactive Publication Date: 2018-10-30
SHANGHAI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Most of the catalysts reported in the literature have a complicated preparation process, inconvenient operation or small specific surface area, and the pore size distribution is not concentrated, which is not conducive to the transfer of substances in the pores during the reaction process, and at the same time, the catalytic rate of the hydrogen transfer of aromatic nitro compounds is relatively slow.

Method used

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  • Preparation method of composite material of mesoporous carbon-silica loaded nano-moo3 and nano-metal particles
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  • Preparation method of composite material of mesoporous carbon-silica loaded nano-moo3 and nano-metal particles

Examples

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Embodiment 1

[0028] In this example, see Figure 1~3 , a mesoporous carbon-silica supported nano-MoO 3 The preparation method of the composite material with nano metal particles is characterized in that it comprises the following steps:

[0029] a. Using the mixed solution of ethanol and water as solvent, dissolve 0.3g nickel nitrate hexahydrate, 0.0334g ammonium molybdate tetrahydrate and 1g SBA-15 in 40ml water / ethanol (v / v=1:1) mixed solution , ultrasonically oscillating at room temperature for 30 minutes until SBA-15 is completely dispersed in the solution to obtain the first mixed solution;

[0030] b. Constantly stirring the first mixed solution prepared in the step a at 40°C, gradually evaporating the solvent to obtain a solid, and heating at 400°C for 2 h in an air atmosphere to obtain the first solid material;

[0031]c. Using a mixed solution of ethanol and water as a solvent, dissolve 0.5 g of the first solid material obtained in step b into 40 ml of a mixed solution of water ...

Embodiment 2

[0039] This embodiment is basically the same as Embodiment 1, especially in that:

[0040] In this example, see Figure 4~6 , a mesoporous carbon-silica supported nano-MoO 3 The preparation method of the composite material with nano metal particles is characterized in that it comprises the following steps:

[0041] a. Using a mixed solution of ethanol and water as a solvent, dissolve 0.3g of cobalt nitrate hexahydrate, 0.0334g of ammonium molybdate tetrahydrate and 1g of SBA-15 in 40ml of water / ethanol (v / v=1:1) mixed solution , ultrasonically oscillating at room temperature for 30 minutes until SBA-15 is completely dispersed in the solution to obtain the first mixed solution;

[0042] b. Constantly stirring the first mixed solution prepared in step a at 60° C., gradually evaporating the solvent to obtain a solid, and heating at 400° C. for 2 h in an air atmosphere to obtain the first solid material;

[0043] c. Dissolve 0.5 g of the first solid material obtained in the ste...

Embodiment 3

[0049] This embodiment is basically the same as the previous embodiment, and the special features are:

[0050] In this example, see Figure 7-9 , a mesoporous carbon-silica supported nano-MoO 3 The preparation method of the composite material with nano metal particles is characterized in that it comprises the following steps:

[0051] a. Using a mixed solution of ethanol and water as a solvent, dissolve 0.25g of ferric nitrate hexahydrate, 0.0334g of ammonium molybdate tetrahydrate and 1g of SBA-15 in 40ml of water / ethanol (v / v=1:1) mixed solution , ultrasonically oscillating at room temperature for 30 minutes until SBA-15 is completely dispersed in the solution to obtain the first mixed solution;

[0052] b. Constantly stirring the first mixed solution prepared in the step a at 50°C, gradually evaporating the solvent to obtain a solid, and heating at 400°C for 2 h in an air atmosphere to obtain the first solid material;

[0053] c. Dissolve 0.5g of the first solid materia...

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Abstract

The invention discloses a preparation method for preparing the composite material of mesoporous carbon-silicon oxide-loaded nano MoO3 and nano metal particles. According to the technical scheme of the invention, the method can be used for preparing a mesoporous MoO3-Ni(Co, Fe) / NG-C@SBA-15 catalyst high in specific surface area and applied to the selective hydrogen transfer reduction of aromatic nitro compounds. Based on the preparation method, the catalyst is prepared firstly through the simple secondary dipping process and then through the pyrolysis and reduction process. The preparation method is simple in equipment, and simple and convenient in operation. Based on the method, the mesoporous MoO3-Ni(Co, Fe) / NG-C@SBA-15 composite material, narrow in pore size distribution and high in specific surface area, can be prepared. The catalyst is higher in activity and selectivity for the selective hydrogen transfer reduction compared with a variety of conventional industrial aromatic nitro compounds.

Description

technical field [0001] The invention relates to a preparation method of a composite material catalyst, in particular to a mesoporous carbon-silicon oxide supported nano-nano composite material catalyst, which is applied in the technical field of inorganic nano-material preparation. Background technique [0002] According to the definition of the International Union of Pure and Applied Chemistry (IUPAC), porous materials can be divided into three categories according to their pore diameters: materials with pore diameters less than 2 nm are microporous materials; materials with pore diameters between 2 and 50 nm are Mesoporous materials (mesoporous materials); materials with a pore diameter larger than 50 nm are macroporous materials (macroporous materials). Mesoporous materials have the characteristics of extremely high specific surface area, good pore structure, narrow pore size distribution, and continuously adjustable pore size, making them widely used in adsorption, separ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/04B01J35/10
CPCB01J29/045B01J35/1004B01J2229/183
Inventor 汪学广黄海根丁伟中鲁雄刚尚兴付邹秀晶李旭盛瑶
Owner SHANGHAI UNIV
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