Method for preparing hydrogen energy catalyst layered potassium titanate by utilizing screw extrusion

A catalyst layer and screw extrusion technology, applied in the field of photocatalysts, can solve the problems of complex semiconductor guest process, affecting large-scale stable preparation, and introducing instability.

Inactive Publication Date: 2020-08-25
CHENDU NEW KELI CHEM SCI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the current problems of introducing semiconductor guests between the layers of layered titanate, which are complex, unstable, and affect large-scale and stable preparation, the present invention proposes a method for preparing hydrogen energy catalyst layered potassium titanate by screw extrusion

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  • Method for preparing hydrogen energy catalyst layered potassium titanate by utilizing screw extrusion

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Embodiment 1

[0028] A method for preparing hydrogen energy catalyst layered potassium titanate by screw extrusion, comprising the following steps:

[0029] (1) Butyl titanate, potassium citrate, ethanol, dilute nitric acid, and polyethylene glycol were formulated into a sol solution with a pH value of 2; the butyl titanate, potassium citrate, ethanol, dilute nitric acid, polyethylene glycol The mass ratio of diol is 60:40:40:60:13;

[0030] (2) Send the sol solution obtained in step (1) into the heat treatment chamber through high-pressure atomization, the pressure atomization pressure is 12Mp, the temperature of the heat treatment chamber is 850°C, and the heat treatment time is 40min to obtain precrystallized layered potassium titanate powder ;

[0031] (3) Disperse the pre-crystallized layered potassium titanate micropowder obtained in step (2) with ferric chloride hexahydrate, deionized water, n-butylamine aqueous solution, urea, and polyacrylamide to form a viscous substance, and dou...

Embodiment 2

[0034] A method for preparing hydrogen energy catalyst layered potassium titanate by screw extrusion, comprising the following steps:

[0035] (1) Butyl titanate, potassium citrate, ethanol, dilute nitric acid, and polyethylene glycol were formulated into a sol solution with a pH value of 3; the butyl titanate, potassium citrate, ethanol, dilute nitric acid, polyethylene glycol The mass ratio of diol is 80:60:30:40:10;

[0036] (2) The sol solution obtained in step (1) is sent to the heat treatment chamber through high-pressure atomization, the pressure atomization pressure is 12Mp, the temperature of the heat treatment chamber is 820°C, and the heat treatment time is 40min to obtain precrystallized layered potassium titanate powder ;

[0037](3) Disperse the pre-crystallized layered potassium titanate micropowder obtained in step (2) with ferric chloride hexahydrate, deionized water, n-butylamine aqueous solution, urea, and polyacrylamide to form a viscous substance, and dou...

Embodiment 3

[0040] A method for preparing hydrogen energy catalyst layered potassium titanate by screw extrusion, comprising the following steps:

[0041] (1) Butyl titanate, potassium citrate, ethanol, dilute nitric acid, and polyethylene glycol were formulated into a sol solution with a pH value of 3; the butyl titanate, potassium citrate, ethanol, dilute nitric acid, polyethylene glycol The mass ratio of diol is 70:30:40:60:14;

[0042] (2) The sol solution obtained in step (1) is sent to the heat treatment chamber through high-pressure atomization, the pressure atomization pressure is 10Mp, the temperature of the heat treatment chamber is 880°C, and the heat treatment time is 50min to obtain precrystallized layered potassium titanate powder ;

[0043] (3) Disperse the pre-crystallized layered potassium titanate micropowder obtained in step (2) with ferric chloride hexahydrate, deionized water, n-butylamine aqueous solution, urea, and polyacrylamide to form a viscous substance, and do...

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Abstract

The invention belongs to the technical field of photocatalysts, and particularly relates to a method for preparing hydrogen energy catalyst layered potassium titanate through screw extrusion. The preparation method comprises the following steps of: preparing a sol solution from butyl titanate, potassium citrate, ethanol, dilute nitric acid and polyethylene glycol; pre-crystallizing the sol solution by utilizing high-pressure atomization to obtain pre-crystallized layered potassium titanate micro-powder, dispersing the pre-crystallized layered potassium titanate micro-powder, ferric trichloridehexahydrate, deionized water, an n-butylamine aqueous solution, urea and polyacrylamide into a viscous material, and shearing, dispersing and extruding the viscous material by virtue of a double-screw extruder; and performing firing to further crystallize the pre-crystallized layered potassium titanate, and meanwhile, forming ferric oxide between layers by pre-intercalated iron ions so as to realize stable intercalation between the layers of the layered potassium titanate so as to obtain the self-assembled layered potassium titanate hydrogen production photocatalyst. Due to the difference ofthe conduction band and valence band energy levels of the two materials, the compounding of photo-induced electrons and holes can be effectively prevented, and the prepared layered nano-composite semiconductor material greatly improves photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a method for preparing hydrogen energy catalyst layered potassium titanate by screw extrusion. Background technique [0002] The current mainstream of energy is fossil fuels. However, the storage of fossil fuels is limited and unsustainable, and it will release a large amount of CO2 after burning, resulting in a greenhouse effect and serious environmental pollution. Therefore, the research, development and utilization of a clean and sustainable new energy system has become the focus and major strategy of all countries in the world. [0003] Hydrogen energy has long been considered as a clean energy that has the potential to replace fossil fuels. However, the current production of hydrogen energy is mainly obtained by reforming coal and natural gas, which will inevitably bring about environmental pollution problems. It is often called For "grey hydrogen". The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J35/00B01J37/08C01B3/04
CPCB01J23/78B01J35/004B01J37/08C01B3/042Y02E60/36
Inventor 曾军堂陈庆张俊陈涛司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD
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