A nanomaterial composited with cdzns quantum dots and carbon dots and its preparation method and application

A technology of nanomaterials and quantum dots, which is applied in the field of nanomaterials and its preparation of CdZnS quantum dots and carbon dots, can solve the problems of immature production technology and high cost of single-layer graphene, and achieve industrial application and recycling The effect of stable performance and stable catalytic performance

Active Publication Date: 2019-06-14
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although graphene oxide (rGO) can reduce production costs, the production technology of single-layer graphene is not mature enough, and the cost is still high

Method used

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  • A nanomaterial composited with cdzns quantum dots and carbon dots and its preparation method and application
  • A nanomaterial composited with cdzns quantum dots and carbon dots and its preparation method and application
  • A nanomaterial composited with cdzns quantum dots and carbon dots and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation of nanomaterials composed of CdZnS quantum dots and carbon dots.

[0031] 1) Add 1g of NaOH and 1g of polyvinyl alcohol into 40mL of deionized water, mix well by ultrasonic vibration, pour into a 50ml polytetrafluoroethylene liner, transfer to an autoclave, and keep warm at 220°C for 12 hours in an electric blast drying oven. After it reaches the reaction time, close the electric blast drying oven, let the whole reaction system cool down to room temperature naturally, then take out the inner container, and filter the product in the inner container with filter paper to obtain a golden yellow clear filtrate;

[0032] 2) Add 8% dilute hydrochloric acid drop by drop to the filtrate. After the filtrate becomes turbid, the solution is evenly divided into centrifuge tubes, centrifuged at a speed of 5000r / min, and the supernatant obtained by centrifugation is poured out, and then separately Add 5ml of ethylene glycol to the centrifuge tube to disperse the...

Embodiment 2

[0034] Example 2: Preparation of nanomaterials composed of CdZnS quantum dots and carbon dots.

[0035]1) Add 1g of NaOH and 1g of polyvinyl alcohol into 40mL of deionized water, mix them evenly by ultrasonic vibration, pour them into a 50ml polytetrafluoroethylene liner, transfer them to an autoclave, and keep them in an electric blast drying oven at 220°C for 12 hours. After it reaches the reaction time, close the electric blast drying oven, let the whole reaction system cool down to room temperature naturally, then take out the inner container, and filter the product in the inner container with filter paper to obtain a golden yellow clear filtrate;

[0036] 2) Add 8% dilute hydrochloric acid drop by drop to the filtrate. After the filtrate becomes turbid, the solution is evenly divided into centrifuge tubes, centrifuged at a speed of 5000r / min, and the supernatant obtained by centrifugation is poured out, and then separately Add 5ml of ethylene glycol to the centrifuge tube...

Embodiment 3

[0038] Example 3: Preparation of nanomaterials composed of CdZnS quantum dots and carbon dots.

[0039] 1) Add 1g of NaOH and 1g of polyvinyl alcohol into 40mL of deionized water, mix them evenly by ultrasonic vibration, pour them into a 50ml polytetrafluoroethylene liner, transfer them to an autoclave, and keep them in an electric blast drying oven at 220°C for 12 hours. After it reaches the reaction time, close the electric blast drying oven, let the whole reaction system cool down to room temperature naturally, then take out the inner container, and filter the product in the inner container with filter paper to obtain a golden yellow clear filtrate;

[0040] 2) Add 8% dilute hydrochloric acid drop by drop to the filtrate. After the filtrate becomes turbid, the solution is evenly divided into centrifuge tubes, centrifuged at a speed of 5000r / min, and the supernatant obtained by centrifugation is poured out, and then separately Add 5ml of ethylene glycol to the centrifuge tub...

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Abstract

The invention provides a nano-material for compounding CdZnS quantum dots and carbon dots, a preparation method of the nano-material and an application. The nano-material comprises nano-particles, a plurality of CdZnS quantum dots are uniformly dispersed and loaded on the carbon dots to form the nano-particles, the diameter of each CdZnS quantum dot is 4-8 nanometers, sulfide precursors and dispersion liquid with the carbon dots are uniformly mixed, and the nano-material is prepared by a solvothermal method. A preparation process is simple and easy to operate and control, the obtained nano-material is stable in nature and low in cost and can serve as a photocatalyst, the CdZnS quantum dots in the nano-particles are uniformly loaded on the carbon dots, aggregation of the CdZnS quantum dots is reduced, stability of the hydrogen production process of substances can be improved, and hydrogen production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and catalysis, and in particular relates to a composite nanomaterial of CdZnS quantum dots and carbon dots, a preparation method and application thereof. Background technique [0002] As a high combustion value, clean and pollution-free energy source, hydrogen energy is an effective way to obtain hydrogen energy. Photocatalytic hydrogen production has attracted the attention of researchers from various countries. In order to improve the efficiency and reduce the cost of photocatalytic hydrogen production, the development of high-efficiency visible light catalysts has become a research hotspot in this field. [0003] Polysulfides are widely studied photocatalysts due to their relatively negative conduction band position, narrow band gap and good response to visible light. However, due to the high recombination rate of photogenerated carriers and easy photocorrosion, the hydrogen production e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B82Y30/00C01B3/02
CPCB01J27/04B01J35/004B82Y30/00C01B3/02
Inventor 王喜娜周小龙彭小牛刘春雷李扬汪汉斌王浩
Owner HUBEI UNIV
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