Preparation method of CuS/ZnS/g-C3N4 ternary composite photocatalyst

A ternary composite and photocatalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve problems such as difficult operation, complex preparation process of multiple composite photocatalysts, and harsh reaction conditions. , to achieve the effects of no pollution to the environment, high separation efficiency of photogenerated electrons and holes, and easy availability of raw materials

Inactive Publication Date: 2018-11-13
常州科力尔环保科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the above-mentioned defects in the prior art of multi-component composite photocatalysts such as complex pre...

Method used

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  • Preparation method of CuS/ZnS/g-C3N4 ternary composite photocatalyst
  • Preparation method of CuS/ZnS/g-C3N4 ternary composite photocatalyst
  • Preparation method of CuS/ZnS/g-C3N4 ternary composite photocatalyst

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preparation example Construction

[0017] A CuS / ZnS / g-C 3 N 4 Preparation method of ternary composite photocatalyst to directly obtain CuS / ZnS / g-C by one-step calcination method 3 N 4 Ternary heterostructure, the specific steps are as follows,

[0018] In the first step, a certain amount of CuCl 2 2H 2 O, ZnCl 2 Mix with thiocyanuric acid to form a precursor mixture; in the second step, grind the mixture evenly and place it in a tube furnace for calcination. The resulting product is washed with distilled water and absolute ethanol and dried to obtain CuS / ZnS / g-C 3 N 4 Ternary composite photocatalyst.

[0019] CuCl 2 2H 2 O, ZnCl 2 The mass ratio to thiocyanic acid is 1~5:1~8:5~20.

[0020] The calcination time is 2~6h, and the calcination temperature is 350~600°C.

[0021] Calcination was performed under nitrogen atmosphere.

Embodiment 1

[0023] A CuS / ZnS / g-C 3 N 4 The preparation method of ternary composite photocatalyst, concrete steps are as follows:

[0024] 2g CuCl 2 2H 2 O, 2g ZnCl 2 Mix it with 6g of thiocyanic acid to form a precursor mixture, grind the mixture evenly, place it in a tube furnace, and calcinate it at 400°C for 3h in a nitrogen atmosphere, wash the obtained product with distilled water and absolute ethanol, and then dry it. That is, CuS / ZnS / g-C is obtained 3 N 4 Ternary composite photocatalyst.

Embodiment 2

[0026] A CuS / ZnS / g-C 3 N 4 The preparation method of ternary composite photocatalyst, concrete steps are as follows:

[0027] 2g CuCl 2 2H 2 O, 2.5g ZnCl 2 Mix it with 8g of thiocyanic acid to form a precursor mixture, grind the mixture evenly, place it in a tube furnace, and calcinate it at 450°C for 3h in a nitrogen atmosphere, wash the obtained product with distilled water and absolute ethanol, and then dry it. That is, CuS / ZnS / g-C is obtained 3 N 4 Ternary composite photocatalyst.

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Abstract

The invention relates to the technical field of photocatalysts, in particular to a preparation method of a CuS/ZnS/g-C3N4 ternary composite photocatalyst. A CuS/ZnS/g-C3N4 ternary heterostructure is directly obtained by the preparation method of the CuS/ZnS/g-C3N4 ternary composite photocatalyst through a one-step calcination method. The preparation method comprises the following specific steps: first step: mixing a certain amount of copper chloride dehydrate, zinc chloride and trithiocyanuric acid to form a precursor mixture; and second step: uniformly grinding the mixture, putting the mixture into a tubular furnace for calcination, washing the obtained product with distilled water and anhydrous ethanol, and drying the product, thus obtaining the CuS/ZnS/g-C3N4 ternary composite photocatalyst. The steps are simple; in the photocatalytic reaction, the preparation method is relatively high in photo-induced electron and hole separation efficiency; the raw materials of the ternary composite photocatalyst are easy to obtain and low in cost; the reaction conditions are mild and cause no pollution to the environment; and the preparation method is favorable for industrial production.

Description

technical field [0001] The present invention relates to a kind of photocatalyst, relate in particular to a kind of CuS / ZnS / g-C 3 N 4 Preparation method of ternary composite photocatalyst. Background technique [0002] As an emerging and green technology, nano-semiconductor-based photocatalysis has great potential in solving energy and environmental problems. As an important transition metal sulfide semiconductor, CuS has a band gap ranging from 1.2eV to 2.2eV according to different shapes and sizes. It is a narrow band gap indirect semiconductor material and has good photoelectric properties under visible light conditions. In the photocatalytic reaction, electrons and holes excited on the surface of CuS are easily recombined, resulting in low photon quantum efficiency and prone to photocorrosion. ZnS is a direct bandgap semiconductor material of the II-VI group. Because of its unique physical and chemical properties, nano-ZnS has been widely concerned in the fields of flu...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08C02F1/30C02F101/36C02F101/38
CPCB01J27/24B01J35/004B01J37/082B01J37/088C02F1/30C02F2101/36C02F2101/38C02F2101/40C02F2305/10
Inventor 宋伟傅小飞李稳高永
Owner 常州科力尔环保科技有限公司
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