Preparation method of carbon quantum dot/titanium dioxide/molybdenum disulfide composite photocatalyst

A technology of molybdenum disulfide and titanium dioxide, which is applied in the field of photocatalysis, can solve the problems of poor interface binding effect, achieve high photocatalytic activity, excellent photocatalytic hydrogen production performance, and improve separation efficiency

Inactive Publication Date: 2021-02-05
杭州靖舒新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this process, due to the different sizes and shapes of the prepared titanium dioxide and molybdenum disulfide semiconductor materials, the interface bonding effect of the two is very poor, making it unable to fully exert the advantages of the composite material. Therefore, people have found a It is very meaningful to combine materials in an appropriate way

Method used

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  • Preparation method of carbon quantum dot/titanium dioxide/molybdenum disulfide composite photocatalyst
  • Preparation method of carbon quantum dot/titanium dioxide/molybdenum disulfide composite photocatalyst

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Embodiment 1

[0023] A method for preparing a carbon quantum dot / titanium dioxide / molybdenum disulfide composite photocatalyst with excellent photocatalytic hydrogen production performance, the specific steps are as follows:

[0024] (1) Preparation of carbon quantum dots: Mix 1g of urea and 10mL of polyethylene glycol evenly, then add 20mL of phosphoric acid, ultrasonicate 3 times, heat in a 300W microwave oven for 10min, and then use sodium hydroxide solution, deionized water and ethanol The mixture was washed separately and ultrasonically oscillated until the pH was neutral, filtered with a 0.22 μm ultrafiltration membrane, and finally dried in vacuum at 70°C;

[0025] (2) Preparation of molybdenum disulfide material: 2.4g sodium molybdate, 3g thioacetamide and 150mL ethylene glycol were added to the three-necked flask, then the three-necked flask was put into a microwave reactor, and nitrogen gas was fed into the three-necked flask. React at 180°C for 1 hour. After the reaction, wash, s...

Embodiment 2

[0029] A method for preparing a carbon quantum dot / titanium dioxide / molybdenum disulfide composite photocatalyst with excellent photocatalytic hydrogen production performance, the specific steps are as follows:

[0030] (1) Preparation of carbon quantum dots: Mix 1g of urea and 10mL of polyethylene glycol evenly, then add 20mL of phosphoric acid, ultrasonicate 3 times, heat in a 300W microwave oven for 10min, and then use sodium hydroxide solution, deionized water and ethanol The mixture was washed separately and ultrasonically oscillated until the pH was neutral, filtered with a 0.22 μm ultrafiltration membrane, and finally dried in vacuum at 70°C;

[0031] (2) Preparation of molybdenum disulfide material: 2.4g sodium molybdate, 3g thioacetamide and 150mL ethylene glycol were added to the three-necked flask, then the three-necked flask was put into a microwave reactor, and nitrogen gas was fed into the three-necked flask. React at 180°C for 1 hour. After the reaction, wash, s...

Embodiment 3

[0035] A method for preparing a carbon quantum dot / titanium dioxide / molybdenum disulfide composite photocatalyst with excellent photocatalytic hydrogen production performance, the specific steps are as follows:

[0036] (1) Preparation of carbon quantum dots: mix 1g of urea and 10mL of polyethylene glycol evenly, then add 30mL of phosphoric acid, after ultrasonication 3 times, heat in a 300W microwave oven for 10min, then use sodium hydroxide solution, deionized water and ethanol The mixture was washed separately and ultrasonically oscillated until the pH was neutral, filtered with a 0.22 μm ultrafiltration membrane, and finally dried in vacuum at 70°C;

[0037] (2) Preparation of molybdenum disulfide material: 2.4g sodium molybdate, 3g thioacetamide and 150mL ethylene glycol were added to the three-necked flask, then the three-necked flask was put into a microwave reactor, and nitrogen gas was fed into the three-necked flask. React at 180°C for 1 hour. After the reaction, was...

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Abstract

The invention discloses a preparation method of a carbon quantum dot / titanium dioxide / molybdenum disulfide composite photocatalyst. The preparation method comprises the following steps of: preparing carbon quantum dots by adopting a solvothermal method, preparing a titanium dioxide / molybdenum disulfide composite material by adopting a microwave method, and further uniformly combining the carbon quantum dots on the surface of the titanium dioxide / molybdenum disulfide composite material through ultrasonic treatment, high-rotating-speed centrifugation and freeze drying treatment. The prepared carbon quantum dot / titanium dioxide / molybdenum disulfide composite photocatalyst has excellent photocatalytic hydrogen production performance and good photocatalytic stability, and efficient hydrogen production can be achieved without the assistance of a platinum-based catalyst.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a preparation method of a carbon quantum dot / titanium dioxide / molybdenum disulfide composite photocatalyst. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of energy and the environment. Due to the relevant characteristics of the photoinduced catalyst surface, it can be effectively used for photocatalytic treatment of pollutants in water or air and photocatalytic The related application of hydrogen production has greatly solved the problems of environmental pollution and energy shortage. [0003] Titanium dioxide is one of the most widely used photocatalytic semiconductor materials. It has the advantages of non-toxic and harmless, high chemical stability, high catalytic activity and low cost. It exhibits excellent photocatalytic effect in the ultraviolet absorption range. Molybdenum disulfide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J21/06B01J21/18B01J37/10B01J37/08B01J37/34B01J37/32C01B3/04C01B32/15C01G23/053C01G39/06B82Y30/00
CPCB01J21/063B01J21/18B01J27/051B01J35/0013B01J35/004B01J37/08B01J37/10B01J37/32B01J37/343B82Y30/00C01B3/042C01G23/0532C01G39/06C01P2002/84C01P2004/80C01B32/15Y02E60/36
Inventor 朱益军
Owner 杭州靖舒新材料有限公司
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