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Cobalt titanate doped titanium nitride photocatalyst for hydrogen production and preparation method

A technology of titanium nitride and cobalt titanate, which is applied in the field of cobalt titanate doped titanium nitride photocatalyst and preparation, can solve the problems of small specific surface area, weak visible light absorption ability, complicated synthesis process, etc., and achieves the improvement of hydrogen production efficiency , good photoresponsivity, and the effect of improving photocatalytic efficiency

Inactive Publication Date: 2018-06-12
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its synthesis process is relatively complicated, its specific surface area is small, and its ability to absorb visible light is weak.

Method used

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  • Cobalt titanate doped titanium nitride photocatalyst for hydrogen production and preparation method

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Embodiment 1

[0030] Cobalt titanate-doped titanium nitride composite photocatalyst preparation method for hydrogen production, in a closed container with a nitrogen concentration of 80%, titanium dioxide nanotubes and metal magnesium particles are placed in a reactor at a mass ratio of 2:1 Among them, the particle size of nanoparticles composed of titanium dioxide nanotubes is 30nm, and the particle size of metal magnesium particles is 0.2mm, and then react at a high temperature of 900°C to obtain titanium nitride, and the prepared titanium nitride is added to the deionized A suspension is formed in a solution composed of hydrated ethanol. The mass fraction of titanium nitride in the suspension is 35%, and the mass fraction of ethanol is 50%. Add cobalt titanate to the liquid so that the mass fraction of cobalt titanate in the mixed suspension is 6%. The mixed suspension is stirred and reacted, centrifuged, permeated and filtered, finally dried at 600°C for 5 hours, and laser sintered to ob...

Embodiment 2

[0032]Cobalt titanate-doped titanium nitride composite photocatalyst preparation method for hydrogen production, in a closed container with a nitrogen concentration of 65%, titanium dioxide nanotubes and metal magnesium particles are placed in a reactor at a mass ratio of 1:1 Among them, the particle size of nanoparticles composed of titanium dioxide nanotubes is 20nm, and the particle size of metal magnesium particles is 0.1mm, and then react at a high temperature of 800°C to obtain titanium nitride, and the prepared titanium nitride is added to the deionized hydration A suspension is formed in a solution composed of ethanol. The mass fraction of titanium nitride in the suspension is 30%, and the mass fraction of ethanol is 40%. The suspension is incubated for 3 hours at a temperature of 80°C, and finally added to the suspension Cobalt titanate was added to the mixed suspension so that the mass fraction of cobalt titanate in the mixed suspension was 5%, the mixed suspension wa...

Embodiment 3

[0034] Preparation method of cobalt titanate-doped titanium nitride composite photocatalyst for hydrogen production. In a closed container with a nitrogen concentration of 70%, titanium dioxide nanotubes and metal magnesium particles are placed in a reactor at a mass ratio of 1:1 Among them, the particle size of nanoparticles composed of titanium dioxide nanotubes is 25nm, and the particle size of metal magnesium particles is 0.2mm, and then react at a high temperature of 1000°C to obtain titanium nitride, and the prepared titanium nitride is added to the deionized hydration A suspension is formed in a solution composed of ethanol. The mass fraction of titanium nitride in the suspension is 35%, and the mass fraction of ethanol is 50%. The suspension is incubated for 4 hours at a temperature of 85°C, so that in the mixed solution The mass fraction of cobalt titanate was 6%. The mixed suspension was stirred and reacted, centrifuged, permeated and filtered, and finally dried at 80...

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Abstract

The invention belongs to the field of photocatalysts, and provides a cobalt titanate doped titanium nitride photocatalyst for hydrogen production and a preparation method. The preparation method comprises the following steps: firstly, putting titanium dioxide nanotubes and metal magnesium particles in a reaction kettle for carrying out high-temperature reaction in a nitrogen atmosphere, thus obtaining titanium nitride; then, adding the titanium nitride into an aqueous solution prepared from deionized water and ethanol, thus forming a suspension solution; finally, adding cobalt titanate into the suspension solution, and carrying out centrifuging, filtering and drying / laser sintering after stirring reaction, thus obtaining the cobalt titanate doped titanium nitride composite photocatalyst. According to the preparation method disclosed by the invention, by utilizing the advantages of narrower band gap and good photo-responsiveness in a visible light zone of the cobalt titanate, a p-n heterojunction photocatalyst is formed by compounding the cobalt titanate with the titanium nitride, so that the photo-responsiveness of the titanium nitride is broadened, the photocatalytic efficiency ofthe titanium nitride is increased, and the hydrogen production efficiency is also increased.

Description

technical field [0001] The invention belongs to the field of photocatalysts, and in particular relates to a cobalt titanate-doped titanium nitride photocatalyst for hydrogen production and a preparation method. Background technique [0002] The traditional hydrogen production method needs to consume a huge amount of conventional energy, making hydrogen energy too expensive, which greatly limits the promotion and application of hydrogen energy. So scientists quickly thought of using the inexhaustible and cheap solar energy as the primary energy in the process of hydrogen energy formation, making hydrogen energy development show a broader prospect. Scientists have discovered that photocatalytic materials can be used as a "medium" to split water into oxygen and hydrogen necessary for fuel cells by using solar energy. Scientists call this technology of producing hydrogen and oxygen with only sunlight and water "the ideal of human beings." One of the technologies". [0003] Pho...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCC01B3/042B01J27/24B01J35/39Y02E60/36
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD
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