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Cadmium sulfide composite material and preparation method and application thereof

A composite material, cadmium sulfide technology, applied in the field of photocatalytic materials, can solve the problems of reducing the efficiency of photogenerated carriers, instability, high price, etc.

Pending Publication Date: 2022-05-27
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its disadvantage is that after CdS is excited by light, long-term light will cause CdS photocorrosion, and the generated photogenerated electrons and holes are easy to recombine, which reduces its photogenerated carrier efficiency and seriously restricts its photocatalytic activity.
At the same time, the co-catalysts currently used in photocatalytic hydrogen production are often noble metals such as platinum (Pt), which are expensive and unstable during the reaction process, which greatly limits the development of CdS photocatalytic hydrogen production.

Method used

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  • Cadmium sulfide composite material and preparation method and application thereof
  • Cadmium sulfide composite material and preparation method and application thereof
  • Cadmium sulfide composite material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0036] Example 1 A cadmium sulfide composite material was prepared, and the cadmium sulfide composite material included cadmium sulfide nanorods and polyethyleneimine-modified Ti supported on the cadmium sulfide nanorods 3 C 2 Quantum dots; CdS nanorods with a diameter of 20-30 nm and a length of 1-1.5 μm, polyethyleneimine-modified Ti 3 C 2 The diameter of the quantum dot is 5nm, and its preparation method includes the following steps:

[0037] S1. Weigh 40 mg of CdS nanorods, then add 40 mL of water to sonicate, stir evenly, and add 100 μL of 0.4 g / L polyethyleneimine-modified Ti 3 C 2 Quantum dots, obtain suspension;

[0038] S2. The suspension is evaporated under freeze-drying conditions at -60°C and 8Pa pressure to obtain yellow powder;

[0039] S3. Naturally cooled to room temperature, the obtained sample was ground again, and the obtained product was marked as CdS@100Ti 3 C 2 QDs.

Embodiment 2

[0041] Example 2 A cadmium sulfide composite material was prepared, and the cadmium sulfide composite material included cadmium sulfide nanorods and polyethyleneimine-modified Ti supported on the cadmium sulfide nanorods 3 C 2 Quantum dots; CdS nanorods with a diameter of 20-30 nm and a length of 1-1.5 μm, polyethyleneimine-modified Ti 3 C 2 The diameter of the quantum dot is 5nm, and its preparation method includes the following steps:

[0042] S1. Weigh 40 mg of CdS nanorods, then add 40 mL of water to sonicate, stir evenly, and add 200 μL of 0.4 g / L polyethyleneimine-modified Ti 3 C 2 Quantum dots, obtain suspension;

[0043] S2. The suspension is evaporated under freeze-drying conditions at -60°C and 8Pa pressure to obtain yellow powder;

[0044] S3. Naturally cooled to room temperature, the obtained sample was ground again, and the obtained product was marked as CdS@200Ti 3 C 2 QDs.

Embodiment 3

[0046] Example 3 A cadmium sulfide composite material was prepared, and the cadmium sulfide composite material included cadmium sulfide nanorods and polyethyleneimine-modified Ti supported on the cadmium sulfide nanorods 3 C 2 Quantum dots; CdS nanorods with a diameter of 20-30 nm and a length of 1-1.5 μm, polyethyleneimine-modified Ti 3 C 2 The diameter of the quantum dot is 5nm, and its preparation method includes the following steps:

[0047] S1. Weigh 40 mg of CdS nanorods, then add 40 mL of water to sonicate, stir evenly, and add 300 μL of 0.4 g / L polyethyleneimine-modified Ti 3 C 2 Quantum dots, obtain suspension;

[0048] S2. The suspension is evaporated under freeze-drying conditions at -60°C and 8Pa pressure to obtain yellow powder;

[0049] S3. Naturally cooled to room temperature, the obtained sample was ground again, and the obtained product was marked as CdS@300Ti 3 C 2 QDs.

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Abstract

The invention discloses a cadmium sulfide composite material as well as a preparation method and application thereof. The cadmium sulfide composite material comprises a cadmium sulfide nanorod and a polyethyleneimine modified Ti3C2 quantum dot loaded on the cadmium sulfide nanorod. According to the preparation method disclosed by the invention, the polyethyleneimine modified Ti3C2 quantum dots are introduced into the cadmium sulfide nanorod, so that the polyethyleneimine modified Ti3C2 quantum dots are loaded on the CdS nanorod. The Ti3C2 quantum dots and the cadmium sulfide nanorods have strong interaction, so that heterojunctions are formed, rapid migration of photo-induced electrons is facilitated, and the photocatalytic performance of cadmium sulfide is improved. The cadmium sulfide composite material has the advantages of high electron hole separation rate, high photocatalytic efficiency and the like, and is applied to hydrogen production through water photolysis under visible light, and the hydrogen evolution efficiency of the cadmium sulfide composite material is more than 5 times that of the conventional cadmium sulfide nanorod loaded Pt as a cocatalyst.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a cadmium sulfide composite material and a preparation method and application thereof. Background technique [0002] Hydrogen (Hydrogen, H 2 ) The product after combustion is only clean water and it can be regenerated from water, so hydrogen is considered as an ideal clean energy. Since Honda and Fujishima pioneered the research on the conversion of solar energy into hydrogen energy, photocatalytic reduction and splitting of water to produce hydrogen is expected to achieve green and sustainable energy development. With the development of human society, the massive consumption of fossil energy and the increasing energy crisis, the development of new energy has become a problem that human beings have to consider. Solar energy is inexhaustible, and converting it into chemical energy that we can use has become the focus of human research. [0003] Cadm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C01B3/04
CPCB01J27/22C01B3/042B01J35/39Y02E60/36
Inventor 许成群李德志刘海洋
Owner WUYI UNIV