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CdS quantum dot/superthin g-C3N4 nanosheet composite photocatalyst and preparation method thereof

A C3N4, g-c3n4 technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of easy recombination of photogenerated electrons and holes, low utilization of visible light, and harsh preparation conditions. , to achieve the effect of good application prospect, low price and wide light response range

Inactive Publication Date: 2015-07-29
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, this photocatalyst is not ideal in practical applications, and has disadvantages such as low utilization rate of visible light, difficult recovery, harsh preparation conditions, and easy recombination of photogenerated electrons and holes.

Method used

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  • CdS quantum dot/superthin g-C3N4 nanosheet composite photocatalyst and preparation method thereof
  • CdS quantum dot/superthin g-C3N4 nanosheet composite photocatalyst and preparation method thereof
  • CdS quantum dot/superthin g-C3N4 nanosheet composite photocatalyst and preparation method thereof

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Embodiment Construction

[0019] The embodiments of the present invention are described in further detail below in conjunction with the drawings. protected range.

[0020] Synthesis of catalyst material of the present invention:

[0021] (1) Preparation of block g-C 3 N 4: Weigh 6.5 g of urea in a crucible, put the lid on and put it in a muffle furnace, first raise the temperature to 250 °C at a rate of 5 °C / min, and then raise it to 550 °C at a rate of 8 °C / min, at 550 °C Calcined for 2 h. Natural cooling, milling, to get blocky g-C 3 N 4 .

[0022] (2) Preparation of ultra-thin g-C 3 N 4 Nanosheets: 200 mg block g-C prepared above 3 N 4 Dispersed in 200 mL of deionized water, ultrasonically stripped for 16 h, then allowed to stand for 12 h, and the upper layer of uniform turbid liquid was collected by suction filtration with a 0.22 μm organic filter membrane to obtain ultra-thin g-C 3 N 4 Nanosheets.

[0023] (3) Preparation of CdS quantum dots / ultra-thin g-C 3 N 4 : Weigh 50 mg ultra-...

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Abstract

The invention discloses a CdS quantum dot / superthin g-C3N4 nanosheet composite photocatalyst and a preparation method thereof. CdS quantum dot / superthin g-C3N4 is a composite visible light catalyst formed by loading CdS quantum dots on a superthin g-C3N4 nanosheet. Compared with a pure g-C3N4 catalyst, the CdS quantum dot / superthin g-C3N4 photocatalyst prepared by the preparation method disclosed by the invention is higher in photocatalyst activity; under the irradiation of visible light, the hydrogen production efficiency of the catalyst by photocatalytic decomposition reaches 998mu molh<-1>g<-1>. The CdS quantum dot / superthin g-C3N4 nanosheet composite photocatalyst and the preparation method thereof disclosed by the invention have the advantages that raw materials are low in price and easily obtained, an experiment method is simple, and the catalyst is wide in light response range and high in photocatalytic efficiency. The material is matched with other materials to form a corresponding photocatalytic device; the CdS quantum dot / superthin g-C3N4 nanosheet composite photocatalyst has good potential application prospect of promoting the industrial development of the solar scale hydrogen production technology and solar catalytic oxidation and synthesis.

Description

technical field [0001] The invention relates to a CdS quantum dot / ultra-thin g-C 3 N 4 Nano sheet composite photocatalyst and preparation method thereof. Background technique [0002] Energy is the basis of human activities and the material premise of the development of human society. Compared with traditional fossil energy (such as coal and petroleum), hydrogen energy is a clean energy source. It can be obtained from water, and the product of complete combustion is water. It will not cause any pollution to the environment and is the cleanest energy in the world. Although the technology of using natural gas, oil, coal and other fossil energy to produce hydrogen through thermochemical method is relatively mature, it is neither economical nor environmentally friendly, and the method of electrolyzing water consumes a lot of energy. If we can use renewable energy ( Such as solar energy) decomposes water to produce hydrogen, then hydrogen can be called a real "green energy". ...

Claims

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Application Information

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IPC IPC(8): B01J27/24
Inventor 黄艳邢秋菊余建朱红允邹建平刘啟明曹雅雯
Owner NANCHANG HANGKONG UNIVERSITY
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