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NiTi hydrotalcite nanosheet catalyst responding to visible light, and preparation method of catalyst

A visible light, hydrotalcite technology, applied in chemical instruments and methods, physical/chemical process catalysts, oxygen preparation, etc., can solve the problems of catalyst nanocrystalline particle agglomeration, limited metal-oxygen-metal bonds, and limited applications, etc. Visible light catalytic performance, low cost, simple operation effect

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

AI Technical Summary

Problems solved by technology

However, its Zn has self-degradation and other reasons, which limits its further application.
The traditional method of synthesizing hydrotalcite adopts the co-precipitation method, and the synthesized catalyst has serious agglomeration of nanocrystalline particles, which provides limited metal-oxygen-metal bonds, which limits the further improvement of its performance.

Method used

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  • NiTi hydrotalcite nanosheet catalyst responding to visible light, and preparation method of catalyst
  • NiTi hydrotalcite nanosheet catalyst responding to visible light, and preparation method of catalyst
  • NiTi hydrotalcite nanosheet catalyst responding to visible light, and preparation method of catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Prepare 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, and stir; slowly add 1-butanol 2ml, stir until clear;

[0021] 2. Put 0.004mol Ni(NO 3 ) 2 ·6H 2 O is added to the microemulsion prepared in step 1. After the salt is dissolved, TiCl is added in a closed environment. 4 Solution 0.11ml, after the smoke disappears, add 1.200g urea, crystallization and reflux at 100℃ for 27h; TiCl added 4 The solution contains 0.001mol of titanium;

[0022] 3. After the reaction is completed, the product is filtered with suction, and washed 3 times by centrifugation with a mixed solution of deionized water and ethanol with a volume ratio of 1:1, and then washed 3 times with absolute ethanol. Visible light-responsive NiTi hydrotalcite nanosheet catalysts were obtained.

[0023] The chemical formula of the visible light-responsive NiTi hydrotalcite n...

Embodiment 2

[0027] 1. Prepare 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, and stir; slowly add 1-butanol 2ml, stir until clear;

[0028] 2. Put 0.004mol Ni(NO 3 ) 2 ·6H 2 O is added to the microemulsion prepared in step 1. After the salt is dissolved, TiCl is added in a closed environment. 4 Solution 0.11ml, after the smoke disappears, add 0.900g urea, crystallization and reflux at 100℃ for 27h; TiCl added 4 The solution contains 0.001mol of titanium;

[0029] 3. After the reaction is completed, the product is filtered with suction, and washed 3 times by centrifugation with a mixed solution of deionized water and ethanol with a volume ratio of 1:1, and then washed 3 times with absolute ethanol. Visible light-responsive NiTi hydrotalcite nanosheet catalysts were obtained.

[0030]The chemical formula of the visible light-responsive NiTi hydrotalcite na...

Embodiment 3

[0034] 1. Prepare 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, and stir; slowly add 1-butanol 1.5ml, stir until clear;

[0035] 2. Put 0.004mol Ni(NO 3 ) 2 ·6H 2 O is added to the microemulsion prepared in step 1. After the salt is dissolved, TiCl is added in a closed environment. 4 Solution 0.11ml, after the smoke disappears, add 0.900g urea, crystallization and reflux at 130℃ for 27h; TiCl added 4 The solution contains 0.001mol of titanium;

[0036] 3. After the reaction is completed, the product is filtered with suction, and washed 3 times by centrifugation with a mixed solution of deionized water and ethanol with a volume ratio of 1:1, and then washed 3 times with absolute ethanol. Visible light-responsive NiTi hydrotalcite nanosheet catalysts were obtained.

[0037] The chemical formula of the visible light-responsive NiTi hydrotalcite...

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Abstract

The invention belongs to the technical field of novel catalytic material preparation and discloses a NiTi hydrotalcite nanosheet catalyst responding to visible light and a preparation method of the catalyst. According to the invention, NiTi hydrotalcite nanosheets are synthesized by an anti-phase microemulsion method and show excellent catalytic performance by visible light. The preparation method realizes controllability of a microemulsion environment by adjusting and controlling the proportions of a surface active agent and water; and hydrotalcite is crystallized and grows in the microemulsion and the particle size of the hydrotalcite ranges from 30 nm to 80 nm. A solvent used in the method is low in cost and simple to operate and can be recycled. The obtained hydrotalcite nanosheet catalyst has the advantages of simple synthesizing conditions, cheap raw materials and easiness in large-scale industrial production. The NiTi hydrotalcite nanosheet catalyst prepared in the invention has an excellent characteristic of responding to visible light, is five times quicker than micron-sized hydrotalcite synthetized with a traditional codeposition method in water decomposition performance by visible light, and is hopefully expected to be widely applied to the fields like solar thermal utilization, adsorption and additives.

Description

technical field [0001] The invention belongs to the technical field of nano-catalysts, and particularly relates to a photocatalyst for water splitting by visible light of NiTi hydrotalcite nano-sheets and a preparation method thereof. Background technique [0002] From the aspect of solar energy utilization, visible light catalysis is of great significance. Among them, solar water splitting to produce oxygen and hydrogen has aroused widespread interest. As a half-reaction of photo-splitting water, compared with water reduction, water oxidation requires the utilization of four electrons and is more difficult to form O-O bonds, so it puts forward more stringent requirements on catalysts. Therefore, the development of suitable photocatalytic water splitting catalysts for the production of oxygen is crucial for understanding photototal water splitting. to TiO based 2 For the first time photo-splitting water, a large number of Ti-based catalysts have been applied to this field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232C01B13/02
Inventor 卫敏赵宇飞李蓓高娃段雪
Owner BEIJING UNIV OF CHEM TECH
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