Photocatalytic composite material as well as preparation method and application thereof

A composite material and photocatalytic technology, applied in the field of photocatalytic composite materials and their preparation, can solve the problems of large power consumption, the need to improve the separation ability, and the limited application of transition metal sulfide semiconductor materials.

Active Publication Date: 2018-12-11
SUZHOU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First, the solid polymer electrolyte membrane is the core part of hydrogen production by electrolysis of water. However, the development of domestic solid polymer electrolyte membranes is limited and depends on a few foreign companies, so the cost of hydrogen production is relatively high.
Second, as a catalyst film, its service life is limited and its repeated utilization rate is low
Third, in the actual operation process, it needs to consume a lot of power, etc.
[0003] In the field of photolysis of water to produce hydrogen, currently commonly used catalysts are pure semiconductor oxides, such as ceria and titanium dioxide, which

Method used

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  • Photocatalytic composite material as well as preparation method and application thereof
  • Photocatalytic composite material as well as preparation method and application thereof
  • Photocatalytic composite material as well as preparation method and application thereof

Examples

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preparation example Construction

[0024] The invention provides a method for preparing a photocatalytic composite material, comprising the following steps:

[0025] (1) Plant leaves are soaked and pretreated to obtain template biomass;

[0026] (2) impregnating the template biomass obtained in the step (1) in a molybdenum source-sulfur source aqueous solution, and obtaining a composite material precursor after the impregnation;

[0027] (3) Calcining the composite material precursor obtained in the step (2) to obtain a photocatalytic composite material.

[0028] In the invention, plant leaves are soaked and pretreated to obtain template biomass. The present invention has no special limitation on the type of the plant leaves, and the plant leaves well known to those skilled in the art can be used, specifically, arrow bamboo leaves, willow leaves, Ruo bamboo leaves, golden bamboo leaves or purple bamboo leaves.

[0029] In the present invention, the soaking pretreatment preferably includes the following steps:...

Embodiment 1

[0043] A preparation method of photocatalytic composite material:

[0044] (1) pretreating golden bamboo leaves through soaking to obtain template biomass;

[0045] (2) After mixing 200 mL of a molybdenum source-sulfur source aqueous solution with a sodium molybdate concentration of 0.05 mol / L and a thiourea concentration of 0.10 mol / L with the above-mentioned 10 g template biomass, immerse at 25°C for 72 hours, and take out the impregnated product , followed by cleaning and drying to obtain the precursor of the composite material;

[0046] (3) Under a nitrogen atmosphere, the temperature was raised to 700° C. for 120 minutes at a heating rate of 3° C. / min and calcined for 120 minutes, and then naturally cooled to room temperature to obtain a photocatalytic composite material.

[0047] The soaking pretreatment of the golden bamboo leaves includes: (a) the golden bamboo leaves are mixed with the first medicament (dilute hydrochloric acid with a mass concentration of 5% and abs...

Embodiment 2

[0054] A preparation method of photocatalytic composite material:

[0055] (1) Willow leaves are soaked and pretreated to obtain template biomass;

[0056] (2) After mixing 120 mL of a molybdenum source-sulfur source aqueous solution with an ammonium molybdate concentration of 0.10 mol / L and a sodium sulfide concentration of 0.20 mol / L with the above 5 g template biomass, immerse at 27 ° C for 72 hours, and take out the impregnated product , followed by cleaning and drying to obtain the precursor of the composite material;

[0057] (3) Under a nitrogen atmosphere, the temperature was raised to 500° C. for 150 minutes at a heating rate of 3° C. / min and calcined for 150 minutes, and then naturally cooled to room temperature to obtain a photocatalytic composite material.

[0058] The soaking pretreatment method of described willow leaves is the same as the soaking pretreatment parameters of golden bamboo leaves in Example 1.

[0059] Applying the photocatalytic composite materi...

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Abstract

The invention provides a preparation method of a photocatalytic composite material, and relates to the technical field of catalysts. The preparation method comprises the following steps: (1) carryingout soaking pretreatment on plant leaves, thus obtaining template biomass; (2) mixing a molybdenum source-sulfur source water solution with the template biomass obtained in step (1), and immersing, thus obtaining a composite material precursor; (3) calcining the composite material precursor obtained in step (2), thus obtaining the photocatalytic composite material. The photocatalytic composite material is prepared from needle-like molybdenum sulfide and biomass carbon, wherein the needle-like molybdenum sulfide is loaded on the surface of the flaky biomass carbon; the content of the biomass carbon is 70 to 90 percent, and the content of the molybdenum sulfide is 10 to 30 percent. The photocatalytic hydrogen production performance of the photocatalytic composite material prepared by the invention is superior to that of a pure molybdenum sulfide material, excellent photocorrosion resistance is obtained, and the hydrogen production efficiency is just reduced by about 10 percent after circulating for thrice.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a photocatalytic composite material and its preparation method and application. Background technique [0002] Hydrogen production by electrolysis of water is the most common hydrogen production method, but it has many disadvantages. First, the solid polymer electrolyte membrane is the core part of hydrogen production by electrolysis of water. However, the current development of domestic solid polymer electrolyte membranes is limited and depends on a few foreign companies, so the cost of hydrogen production is relatively high. Second, as a thin film catalyst, its service life is limited and its repeated utilization rate is low. Third, in the actual operation process, a large amount of electric energy needs to be consumed. [0003] In the field of photolysis of water to produce hydrogen, currently commonly used catalysts are pure semiconductor oxides, such as ceria and titanium...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/02C01B3/04
CPCB01J27/051B01J35/004B01J35/02C01B3/042Y02E60/36
Inventor 陈丰王陈程徐敏陈志刚钱君超刘成宝
Owner SUZHOU UNIV OF SCI & TECH
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