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Ni(OH)2 nanoparticle modified SrTiO3 composite catalyst and preparation method and application thereof

A nanoparticle modification and composite catalyst technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as limiting practical applications, and achieve excellent production Hydrogen activity, good photochemical stability, high yield effect

Active Publication Date: 2019-11-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its practical application is severely limited due to its own band gap (3.2 eV) requiring near-ultraviolet (UV) irradiation (approximately 4% of the solar spectrum) for effective photocatalysis.

Method used

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  • Ni(OH)2 nanoparticle modified SrTiO3 composite catalyst and preparation method and application thereof
  • Ni(OH)2 nanoparticle modified SrTiO3 composite catalyst and preparation method and application thereof
  • Ni(OH)2 nanoparticle modified SrTiO3 composite catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example is Ni(OH) 2 The preparation method of the composite catalyst with a molar content of 0.5%, it may further comprise the steps:

[0032] Accurately weigh 0.507g SrTiO 3 , dispersed in the prepared sodium hydroxide solution 50ml, ultrasonic 30min. After the sonication, 276 μl of the prepared nickel nitrate solution was slowly added dropwise under the condition of magnetic stirring, and then kept stirring for 4 hours at room temperature. Finally get 0.5% Ni(OH) 2 / SrTiO 3 Composite catalyst. Finally, wash with ethanol and deionized water for 6 times, and dry in an oven at 60° C. for 12 hours.

Embodiment 2

[0034] This example is Ni(OH) 2 The preparation method of the composite catalyst that molar content is 5%, it may further comprise the steps:

[0035] Accurately weigh 0.507g SrTiO 3 , dispersed in the prepared sodium hydroxide solution 50ml, ultrasonic 30min. After the sonication, under the condition of magnetic stirring, 2.9ml of the prepared nickel nitrate solution was slowly added dropwise, and then kept stirring at room temperature for 4h. Finally get 5% Ni(OH) 2 / SrTiO 3 Composite catalyst. Finally, wash with ethanol and deionized water for 6 times, and dry in an oven at 60° C. for 12 hours.

Embodiment 3

[0037] This example is Ni(OH) 2 The preparation method of the composite catalyst that molar content is 10%, it comprises the following steps:

[0038] Accurately weigh 0.507g SrTiO 3, dispersed in the prepared sodium hydroxide solution 50ml, ultrasonic 30min. After the sonication, under the condition of magnetic stirring, 6.14ml of the prepared nickel nitrate solution was slowly added dropwise, and then kept stirring at room temperature for 4h. Finally got 10%Ni(OH) 2 / SrTiO 3 Composite catalyst. Finally, wash with ethanol and deionized water for 6 times, and dry in an oven at 60° C. for 12 hours.

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Abstract

The invention belongs to the technical synthesis field of nano materials, and discloses a Ni(OH)2 / SrTiO3 composite catalyst and a preparation method and application thereof in photolysis of aquatic hydrogen. SrTiO3 serves as a primary catalyst, Ni(OH)2 serves as a cocatalyst, and the Ni(OH)2 nanoparticle modified SrTiO3 composite catalyst is synthesized through a simple preparation method. The preparation method is easy to operate and control, the product obtained through the preparation method is good in stability, and the photocatalytic effect of SrTiO3 is greatly improved. In an experiment,the molar ratio of Ni(OH)2 in the Ni(OH)2 / SrTiO3 composite is 0%, 0.5%, 5%, 10%, 20% and 25% respectively and is labeled as N0, N0.5, N5, N10, N20 and N25 respectively. The result shows that the composite amount of Ni(OH)2 reaches 20% (molar ratio) under UV-vis radiation, the optimal photocatalytic activity for producing H2 in a methanol solution is 1461.7 micromol h(-1) g(-1), which is about 15times that of the hydrogen production rate of SrTiO3 before treatment, and the hydrogen production rate of SrTiO3 before treatment is 97.7 micromol h(-1) g(-1).

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, in particular to a Ni(OH) compound prepared by a simple deposition method. 2 Nanoparticle-modified SrTiO 3 Composite catalyst and its application in the direction of hydrogen production by photolysis of water. Background technique [0002] With the rapid development of the global economy, a large amount of fossil fuels are over-consumed, and the problem of environmental pollution is imminent. [0003] Facing the challenge of reducing fossil fuels, human beings urgently need a sustainable energy economy. while hydrogen (H 2 ) is considered to be a clean, renewable and abundant energy source. Therefore, photocatalytic water splitting to generate hydrogen has become one of the most effective ways to solve future energy shortages. Titanium dioxide (TiO 2 ) is one of the earliest, well-studied, and most representative materials for photocatalytic water splitting. Compared with th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C01B3/04
CPCB01J23/78C01B3/042C01B2203/0277C01B2203/1058B01J35/39Y02E60/36
Inventor 唐量陈文倩张美琪徐玲吴明红
Owner SHANGHAI UNIV
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