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Dual-functional hollow nanocomposite oxide material and preparation and application thereof

A technology of composite oxides and hollow nanometers, which is applied in the direction of hydrocarbon oxidation to prepare oxygenated compounds, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., and can solve the problems of easy coking, low selectivity, and conversion Low efficiency and other problems, to achieve high activity and selectivity, improve over-reaction, and improve selectivity

Inactive Publication Date: 2013-09-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method generally has low conversion rate and low selectivity, resulting in waste of raw materials
Moreover, it is easy to coke, block the pipeline, and the catalyst is not easy to separate from the product, which increases the cost and causes environmental pollution and other problems.

Method used

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  • Dual-functional hollow nanocomposite oxide material and preparation and application thereof
  • Dual-functional hollow nanocomposite oxide material and preparation and application thereof
  • Dual-functional hollow nanocomposite oxide material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 Material A (Co-SiO 2 -Me) Preparation

[0021] Mix 8.00g Np-12, 15.00g cyclohexane and 3.00g n-octanol to obtain solution A; dissolve 0.02g cobalt acetate in 3.00g deionized water, and add 1.00g ammonia water to obtain solution B; 1.00g orthosilicate Methyl ester and 0.10g methyltrimethoxysilane are solution C; pour solution B into solution A to obtain solution D, add solution C to solution D under stirring, and age for 8 hours; then, add 7g of acetone, stir for 30min, Centrifuge to obtain a solid;

[0022] Add 20g of ethanol to the solid, heat and stir for 10min, and centrifuge; repeat this step 3-6 times until the surfactant is removed; dry at 80°C to obtain the final nanomaterial Co-SiO 2 -Me. Such as figure 1 As shown, it can be seen that the prepared material has a uniform particle size, good dispersion, a particle size of about 60nm, and a cavity diameter of 10nm.

Embodiment 2

[0023] The preparation of embodiment 2 material B-L

[0024] The preparation method of materials B-L is the same as that of material A, the difference lies in the types of metal sources or organosilanes, the specific types of metal sources and organosilanes used are shown in Table 1, and the obtained materials are listed in Table 1.

[0025] The type of metal source and organosilane used in the preparation of material B-L in table 1

[0026]

Embodiment 3

[0027] Embodiment 3 material K (Cu-SiO 2 -Ph) Preparation

[0028] Mix 2.00g sodium dodecylbenzenesulfonate, 10.00g n-hexane and 1.00g n-butanol to obtain solution A; dissolve 0.02g cupric chloride in 2.00g deionized water, and add 2.00g ammonia water to obtain solution B; 1.00g methyl orthosilicate and 0.30 phenyltrimethoxysilane as solution C; pour solution B into solution A to obtain microemulsion D, add solution C to solution D under stirring, and age for 18 hours; then, add 7g Acetone, stirred for 30min, and centrifuged to obtain a solid;

[0029] Add 20g of ethanol to the solid, heat and stir for 10min, and centrifuge; repeat this step 4 times until the surfactant is removed; dry at 80°C to obtain the final nanomaterial Cu-SiO2 -Ph.

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Abstract

The invention discloses a dual-functional hollow nanocomposite oxide material. In the dual-functional hollow nanocomposite oxide material, hollow silicon oxide is taken as a substrate, an inorganic metal oxide is highly dispersed into the hollow silicon oxide substrate, and an organic group is grafted on the surface of the hollow silicon oxide. An inorganic metal is one or more of Co, Cu, Ni, Zn, Ag, Au, Ir, Rh, Pt, Pd and Ru. The organic group is one or more of methyl, ethyl, propyl, vinyl, chloropropyl, phenyl, dodecyl, octadecyl, trifluoropropyl, perfluordecatyl and fluorophenyl. The hollow nanocomposite oxide material synthesized with the method is 20-500 nanometers in particle size, 5-20 nanometers in hollow size, and has the characteristics of adjustable particle size, uniform particle size, high dispersivity, easiness for operating, and the like. The dual-functional hollow nanocomposite oxide material serves as a catalyst for catalyzing cyclohexane oxidation, and shows high activity and high selectivity by taking molecular oxygen as an oxygen source.

Description

technical field [0001] The invention relates to a dual-functional hollow nano-composite oxide material and a preparation method thereof. The invention relates to the application of the above materials in the liquid-phase selective oxidation of cyclohexane. Background technique [0002] Hollow silica materials have the advantages of low density, high specific surface area, good stability, permeability, etc., and have high application prospects in the fields of catalysis, drug release, biomedicine, artificial cells, cosmetics, coatings, etc., which has attracted academic attention. wide attention from the world and industry. Pure hollow silica does not have a functional center, which limits its application in some aspects, such as the need for catalytic active centers in the field of catalysis. In order to further expand the practical application of hollow silica, the hollow silica can be functionalized. One method is to introduce metal active components to generate active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J35/10B01J23/75B01J23/80B01J23/06B01J23/755B01J23/50B01J23/52B01J23/46B01J23/66B01J23/44B01J23/42B01J23/89C07C27/12
Inventor 徐杰王敏陈晨马继平孙志强郑玺
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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