Preparation method for fast-responding Pd-TiO2 nano-particle hydrogen-sensitive material

A nano-particle and fast-response technology, which is applied in the fields of analyzing materials, chemical instruments and methods, and material analysis through electromagnetic means, can solve the problems of difficult hydrogen safe storage and transportation, inability to be sensed by the human body, and fast diffusion speed. Achieve the effect of wide range of hydrogen concentration, fast response and recovery, and small size

Active Publication Date: 2019-05-17
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since hydrogen is a colorless, odorless, flammable and explosive gas, it is also light in weight, elusive, fast in diffusion, requires low temperature liquefaction, and cannot be sensed by the human body, so the safe storage and transportation of hydrogen is not easy

Method used

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  • Preparation method for fast-responding Pd-TiO2 nano-particle hydrogen-sensitive material
  • Preparation method for fast-responding Pd-TiO2 nano-particle hydrogen-sensitive material
  • Preparation method for fast-responding Pd-TiO2 nano-particle hydrogen-sensitive material

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Embodiment 1

[0028] A Fast Response Pd-TiO 2 A method for preparing a nanoparticle hydrogen-sensitive material, comprising the following steps:

[0029] a. Add concentrated hydrochloric acid to deionized water and stir evenly to prepare a 20mM dilute hydrochloric acid solution;

[0030] B, measure the 20mM dilute hydrochloric acid solution of 5ml, add 0.017g palladium chloride, stir to obtain palladium chloride solution;

[0031] c. Slowly add 5ml of tetra-n-butyl titanate and 0.5ml of hydrofluoric acid solution while stirring, and stir until uniform;

[0032] d. Pour the above solution into the lining of the polytetrafluoroethylene reactor, put it into the stainless steel shell, and heat it with water at 180°C for 24h;

[0033] e. After the water heating, let the reactor cool down naturally, centrifuge the obtained precipitate, filter it with suction, and dry it at 60°C for 12 hours to obtain Pd-TiO 2 Nanoparticle hydrogen sensitive materials;

[0034] f. Coating the obtained composit...

Embodiment 2

[0036] A Fast Response Pd-TiO 2 A method for preparing a hydrogen-sensitive material of nanoparticles, comprising the following steps:

[0037] a. Add a certain volume of concentrated hydrochloric acid to a certain volume of deionized water and stir evenly to prepare a 20mM dilute hydrochloric acid solution;

[0038] B, measure the 20mM dilute hydrochloric acid solution of 4ml, add 0.0136g palladium chloride, stir to obtain palladium chloride solution;

[0039] c. Slowly add 5ml of tetra-n-butyl titanate and 0.4ml of hydrofluoric acid solution while stirring, and stir until uniform;

[0040] d. Pour the above solution into the lining of the polytetrafluoroethylene reactor, put it into the stainless steel shell, and heat it with water at 180°C for 24h;

[0041] e. After the water heating, let the reactor cool down naturally, centrifuge the obtained precipitate, filter it with suction, and dry it at 60°C for 12 hours to obtain Pd-TiO 2 Nanoparticle hydrogen sensitive material...

Embodiment 3

[0044] A Fast Response Pd-TiO 2 A method for preparing a hydrogen-sensitive material of nanoparticles, comprising the following steps:

[0045] a. Add a certain volume of concentrated hydrochloric acid to a certain volume of deionized water and stir evenly to prepare a 20mM dilute hydrochloric acid solution;

[0046] B, measure the 20mM dilute hydrochloric acid solution of 6ml, add 0.017g palladium chloride, stir to obtain palladium chloride solution;

[0047] c. Slowly add 5ml of tetra-n-butyl titanate and 0.6ml of hydrofluoric acid solution while stirring, and stir until uniform;

[0048] d. Pour the above solution into the lining of the polytetrafluoroethylene reactor, put it into the stainless steel shell, and heat it with water at 180°C for 24h;

[0049] e. After the water heating, let the reactor cool down naturally, centrifuge the obtained precipitate, filter it with suction, and dry it at 60°C for 12 hours to obtain Pd-TiO 2 Nanoparticle hydrogen sensitive material;...

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Abstract

The invention provides a preparation method for a fast-responding Pd-TiO2 nano-particle hydrogen-sensitive material. The preparation method for the fast-responding Pd-TiO2 nano-particle hydrogen-sensitive material comprises the following steps: 1) adding a certain amount of palladium chloride into a diluted hydrochloric acid solution and uniformly stirring, thereby acquiring a palladium chloride solution; 2) dropping in tetra-n-butyl titanate and hydrofluoric acid solution while stirring, and then uniformly stirring; 3) pouring the solution uniformly stirred in step 2) into a reaction kettle for performing hydrothermal reaction; 4) naturally cooling the reaction kettle after hydrothermal reaction, centrifuging the acquired sediment, performing suction filtration, drying and annealing, thereby acquiring a Pd-TiO2 nano-particle hydrogen-sensitive composite material. The invention has the beneficial effects that the Pd-TiO2 nano-particle hydrogen-sensitive material prepared according to the preparation method for the fast-responding Pd-TiO2 nano-particle hydrogen-sensitive material is short in hydrogen responding time and recovery time and is wide in range of detectable hydrogen concentration.

Description

【Technical field】 [0001] The invention belongs to the field of semiconductor nanomaterials, in particular to a fast response Pd-TiO 2 Preparation method of nano particle hydrogen sensitive material. 【Background technique】 [0002] In recent years, fossil fuels (coal, oil, natural gas) have been depleted, and global issues such as environmental pollution caused by burning fossil fuels have attracted people's attention. Hydrogen energy is recognized as an environmentally friendly, renewable and pollution-free new energy because of its high combustion value and the combustion product is water. However, because hydrogen is a colorless, odorless, flammable and explosive gas, it is also light in weight, elusive, fast in diffusion, requires low temperature liquefaction, and cannot be sensed by the human body, so the safe storage and transportation of hydrogen is not easy. When the volume of hydrogen in the air exceeds 4%, an explosion will occur when encountering an open flame. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30G01N27/00
Inventor 范佳杰马梦君刘自豪陈一文翟进生范向伟
Owner ZHENGZHOU UNIV
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