ZnTi hydrotalcite nanosheet catalyst and application of catalyst in hydrogen preparation by photoactivating and decomposing water

A nanosheet and catalyst technology, which is applied in the field of ZnTi hydrotalcite nanosheet catalyst and its photocatalytic water splitting to produce hydrogen, can solve the problems of low photocatalytic efficiency, achieve excellent semiconductor characteristics, simple synthesis conditions, and easy large-scale industrial production Effect

Inactive Publication Date: 2013-01-16
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to further improve the catalytic performance of ZnTi hydrotalcite, improve its photocatalytic electron-hole separation efficiency, and reduce th

Method used

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  • ZnTi hydrotalcite nanosheet catalyst and application of catalyst in hydrogen preparation by photoactivating and decomposing water
  • ZnTi hydrotalcite nanosheet catalyst and application of catalyst in hydrogen preparation by photoactivating and decomposing water
  • ZnTi hydrotalcite nanosheet catalyst and application of catalyst in hydrogen preparation by photoactivating and decomposing water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Configure microemulsion: Based on a 100ml three-necked flask, add 50ml of isopropanol, 1.1ml of deionized water, and 1.08g of surfactant sodium lauryl sulfate into the three-necked flask, stir; slowly add 1-butanol 2ml, stir until the solution is clear;

[0018] 2. Add 0.002mol of Zn(NO 3 ) 2 ·6H 2 O was added to the microemulsion prepared in step 1, and after the salt was dissolved, TiCl was added in a closed environment 4 Solution 0.11ml, after the smoke disappears, add urea 0.900g, crystallize and reflux at 90°C for 24h; the added TiCl 4 The solution contains 0.001mol TiCl 4 ;

[0019] 3. After the reaction is completed, the product is suction-filtered, centrifuged and washed 3 times with a mixed solution of deionized water and ethanol with a volume ratio of 1:1, and then washed 3 times with absolute ethanol, and the filter cake is dried in an oven at 60°C for 12 hours to obtain ZnTi hydrotalcite nanosheet catalyst.

[0020] The chemical formula of the ZnTi...

Embodiment 2

[0024] 1. Configure microemulsion: Based on a 100ml three-necked flask, add 50ml of isopropanol, 1.1ml of deionized water, and 0.72g of surfactant sodium lauryl sulfate into the three-necked flask, stir; slowly add 1-butanol 2ml, stir until the solution is clear;

[0025] 2. Add 0.002mol of Zn(NO 3 ) 2 ·6H 2 O was added to the microemulsion prepared in step 1, and after the salt was dissolved, TiCl was added in a closed environment 4 Solution 0.11ml, after the smoke disappears, finally add urea 0.900g, crystallize and reflux at 90°C for 24h; the added TiCl 4 The solution contains 0.001mol TiCl 4 ;

[0026] 3. After the reaction is completed, the product is suction-filtered, centrifuged and washed 3 times with a mixed solution of deionized water and ethanol with a volume ratio of 1:1, and then washed 3 times with absolute ethanol, and the filter cake is dried in an oven at 60°C for 12 hours to obtain ZnTi hydrotalcite nanosheet catalyst.

[0027] The chemical formula of ...

Embodiment 3

[0031] 1. Configure microemulsion: Based on a 100ml three-necked flask, add 50ml of isopropanol, 1.1ml of deionized water, and 0.36g of surfactant sodium lauryl sulfate into the three-necked flask, stir; slowly add 1-butanol 1.5ml, stir until the solution is clear;

[0032] 2. Add 0.002mol of Zn(NO 3 ) 2 ·6H 2 O was added to the microemulsion prepared in step 1, and after the salt was dissolved, TiCl was added in a closed environment 4 Solution TiCl 4 0.11ml, after the smoke disappears, add urea 0.900g at last, crystallize and reflux at 90°C for 24h; the added TiCl 4 The solution contains 0.001mol TiCl 4 ;

[0033] 3. After the reaction is completed, the product is suction-filtered, centrifuged and washed 3 times with a mixed solution of deionized water and ethanol with a volume ratio of 1:1, and then washed 3 times with absolute ethanol, and the filter cake is dried in an oven at 60°C for 12 hours to obtain ZnTi hydrotalcite nanosheet catalyst.

[0034] The chemical f...

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Abstract

The invention discloses a ZnTi hydrotalcite nanosheet catalyst belonging to the technical field of novel catalytic material preparation and an application of the catalyst in hydrogen preparation by photoactivating and decomposing water. According to the invention, the ZnTi hydrotalcite nanosheet catalyst is synthesized through the anti-phase microelusion method and applied to the field of hydrogen preparation by decomposing water. The method realizes controllability of a microelustion environment by adjusting and controlling the proportions of surface active agent and water; the hydrotalcite is crystallizes and grows in microelusion; and the particle size of the hydrotalcite can be effectively controlled to range from 40 nm to 100 nm. The solvent used in the method is low in cost and simple to operate and can be recycled; and the hydrotalcite nanosheet catalyst has the advantages of simple synthesizing conditions, cheap raw materials and easiness in large scale industrial production. The ZnTi hydrotalcite synthesized according to the invention has an excellent semi-conductor property, is three times quicker than a traditional micron-sized powder catalyst in hydrogen preparation performance by decomposing water under full spectrum, and is hopefully expected to be widely applied to the fields like photoactivation, adsorption and additives.

Description

technical field [0001] The invention belongs to the technical field of nano-catalysts, and in particular relates to a ZnTi hydrotalcite nano-sheet catalyst and its application to photocatalytically decompose water to prepare hydrogen. Background technique [0002] Due to the increasingly serious energy crisis, the use of renewable energy to produce clean energy—hydrogen energy has become a research hotspot in various countries. The key to solving such problems is to find suitable high-performance catalysts. Hydrotalcites (LDHs) are an important class of anionic layered clay materials. The divalent and trivalent metal cations of the laminates are highly dispersed in the laminates and form an ordered main structure with covalent bonds with hydroxyl groups. The researchers adjusted different types of metal ions through rational design, which endowed the material with multifunctional properties. The ZnTi hydrotalcite formed by introducing Zn and Ti into the hydrotalcite laminat...

Claims

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Application Information

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IPC IPC(8): B01J31/38C01B3/04
CPCY02E60/364Y02E60/36
Inventor 卫敏赵宇飞高娃李蓓段雪
Owner BEIJING UNIV OF CHEM TECH
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