Acidified mesoporous WO3/SiO2 multi-component colloidal sphere and application thereof

A colloidal ball, multi-component technology, applied in chemical/physical process, organic chemistry, carboxylate preparation, etc., to achieve the effect of less environmental pollution and high catalytic efficiency

Active Publication Date: 2014-09-24
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(Julien Polleux, et.al., Template-Free Synthesis and Assembly of Single-Crystalline Tungsten Oxide Nanowires and their Gas-SensingProperties, Angew.Chem.Int.Ed.2005, 44, 267-271.) The literature reports close to this patent have : Wu et al. (Effects of tungsten oxide on the activity and thermal stability of a sulfate-derived titania supported platinum catalyst for propane oxidation) prepared multicomponent Pt/WO by isometric impregnation 3 /TiO 2 Catalyst, Zhang et al. (L. Zhang, et.al., Facilesynthesis and photocatalytic activi

Method used

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  • Acidified mesoporous WO3/SiO2 multi-component colloidal sphere and application thereof
  • Acidified mesoporous WO3/SiO2 multi-component colloidal sphere and application thereof
  • Acidified mesoporous WO3/SiO2 multi-component colloidal sphere and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1# acidified mesoporous WO 3 / SiO 2 The concrete preparation steps of multi-component colloidal ball catalyst are as follows:

[0036] (1) Preparation of cetyltrimethylammonium phosphotungstate

[0037] Measure 100mL of absolute ethanol into a beaker, add 0.44g of cetyltrimethylammonium bromide (CTAB), stir until CTAB is completely dissolved, measure 50mL of absolute ethanol into another beaker, add 1.15g For phosphotungstic acid, stir with a glass rod until the phosphotungstic acid is completely dissolved. While stirring, use a dropper to add the phosphotungstic acid solution to the CTAB solution dropwise. After the addition is complete, continue to stir for half an hour to make it fully react. After filtering and drying, the product hexadecyltrimethylphosphotungstic acid quaternary ammonium was obtained, which was designated as W-6.

[0038] (2) WO 3 / SiO 2 Preparation of multi-component colloidal spheres

[0039] Weigh 200mg of W-6 and 110mg of CTAB into a rou...

Embodiment 2

[0045] 2# acidified mesoporous WO 3 / SiO 2 The concrete preparation steps of multi-component colloidal ball catalyst are as follows:

[0046] (1) Preparation of W-6

[0047] With the preparation method of W-6 among the embodiment 1.

[0048] (2) WO 3 / SiO 2 Preparation of multi-component colloidal spheres

[0049]Weigh 200mg of W-6 and 110mg of CTAB into a round bottom flask, add 20mL of absolute ethanol, disperse in ultrasonic wave for 30min, until the solid is completely dispersed, add 80mL of distilled water dropwise, and keep stirring at 28°C. After stirring for 6h, add 0.3mL ammonia water and 0.5mL TEOS, continue stirring at constant temperature for 16 hours, filter and dry to obtain WO 3 / SiO 2 Multi-component colloidal balls.

[0050] (3) Mesoporous WO 3 / SiO 2 Preparation of multi-component colloidal spheres

[0051] With the preparation method of step (3) in the embodiment 1.

[0052] (4) Acidified mesoporous WO 3 / SiO 2 Preparation of multi-component co...

Embodiment 3

[0055] 3# acidified mesoporous WO 3 / SiO 2 The concrete preparation steps of multi-component colloidal ball catalyst are as follows:

[0056] (1) Preparation of W-6

[0057] With the preparation method of W-6 among the embodiment 1.

[0058] (2) WO 3 / SiO 2 Preparation of multi-component colloidal spheres

[0059] Weigh 200mg of W-6 and 110mg of CTAB into a round bottom flask, add 20mL of absolute ethanol, disperse in ultrasonic wave for 30min, until the solid is completely dispersed, add 80mL of distilled water dropwise, and keep stirring at 28°C. After stirring for 6 hours, add 0.3mL ammonia water and 0.4mL TEOS, continue to stir at constant temperature for 16 hours, filter and dry to obtain WO 3 / SiO 2 Multi-component colloidal balls.

[0060] (3) Mesoporous WO 3 / SiO 2 Preparation of multi-component colloidal spheres

[0061] With the preparation method of step (3) in the embodiment 1.

[0062] (4) Acidified mesoporous WO 3 / SiO 2 Preparation of multi-compone...

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PUM

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Abstract

The invention discloses an acidified mesoporous WO3/SiO2 multi-component colloidal sphere, belonging to the field of chemical catalysts. An active component of the colloidal sphere is SO4<2->/WO3/SiO2 of which the structure is like a colloidal sphere; the active component has a mesoporous structure and is high in dispersion property; the particle size is 100-900nm, and the aperture is 3-5nm. The acidified mesoporous WO3/SiO2 multi-component colloidal sphere disclosed by the invention is used as the catalyst; during catalysis of the esterification reaction between different long-chain fatty acids and alcohols, the acidified mesoporous WO3/SiO2 multi-component colloidal sphere is excellent in catalyst performance and high in stability. During esterification reaction in which the long-chain fatty acids are oil acids and the alcohols are methanol, and when the using amount of the colloidal sphere catalyst is 3 percent, the esterification rate of the oil acid can reach 97.0 percent; after the oil acids are continuously and cyclically used for 5 times, the conversion rate of the oil acids can be still kept at about 97 percent.

Description

technical field [0001] The invention belongs to the field of chemical catalysts, in particular to an acidified mesoporous WO 3 / SiO 2 Multi-component nanocomposite material and its preparation technology, especially an acidified mesoporous WO with good dispersion, controllable shape and particle size 3 / SiO 2 Multi-component colloidal ball and its preparation technology. The acidified mesoporous WO prepared by the present invention 3 / SiO 2 Multi-component colloidal spheres are used as catalysts to catalyze the esterification of long-chain fatty acids, and have achieved good catalytic effects. Background technique [0002] Multi-component hybrid materials with controllable morphology and composition have great potential application value in the fields of catalysis, solar energy conversion and photoelectric technology (P.Li, et al.Au-ZnO Hybrid Nanopyramids and Their Photocatalytic Properties, J.Am.Chem.Soc.2011,133,5660-5663; T.Yu, et al.AqueousPhase Synthesis of Pt / Ce...

Claims

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Application Information

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IPC IPC(8): B01J27/053C07C67/08C07C69/24C07C69/58
Inventor 陈国昌肖标乔红斌裘小宁蒋伟峰吴胜华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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