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Phosphorus-doped Mn0.3Cd0.7S nanorod photocatalyst as well as preparation method and application thereof

A technology of photocatalysts and nanorods, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as complex process flow and high cost, and achieve methods that are easy to operate, easy to implement, and increase solar spectral response range effect

Inactive Publication Date: 2020-05-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For existing Mn x Cd 1-x In the preparation method of the S-based catalyst, there are problems of complex technological process and high cost. The purpose of the present invention is to provide a stable and high-efficiency phosphorus-doped Mn 0.3 Cd 0.7 S nanorod photocatalyst and its preparation method and application

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  • Phosphorus-doped Mn0.3Cd0.7S nanorod photocatalyst as well as preparation method and application thereof
  • Phosphorus-doped Mn0.3Cd0.7S nanorod photocatalyst as well as preparation method and application thereof
  • Phosphorus-doped Mn0.3Cd0.7S nanorod photocatalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A phosphorus-doped Mn 0.3 Cd 0.7 The preparation method of S nanorod photocatalyst comprises the steps:

[0044] (1) 190mg of NaH 2 PO 2 ·H 2 O, 200 mg of Mn 0.3 Cd 0.7 The S catalysts were mixed, and then ball milled for 20min at a speed of 300rpm to obtain a mixture;

[0045] (2) Transfer the above mixture to a tube furnace, and feed it with argon. After 30 minutes, heat up under an argon protective atmosphere at a rate of 2°C.min -1 , heated to 300°C for calcination for 2h. Cool to room temperature, wash alternately with ethanol and water, filter to get the precipitate, and dry to obtain the phosphorus-doped Mn 0.3 Cd 0.7 S nanorod photocatalyst. The phosphorous doping Mn that embodiment 1 makes 0.3 Cd 0.7 S nanorod photocatalyst labeled as 190P-Mn 0.3 Cd 0.7 S.

[0046] Under the irradiation of a 300WXe lamp, the reaction temperature is 15°C, and the phosphorous-doped Mn prepared in Example 1 0.3 Cd 0.7 S nanorod photocatalyst (i.e. 190P-Mn 0.3 Cd ...

Embodiment 2

[0048] A phosphorus-doped Mn 0.3 Cd 0.7 The preparation method of S nanorod photocatalyst comprises the steps:

[0049] (1) Add 200mg of NaH 2 PO 2 ·H 2 O, 200 mg of Mn 0.3 Cd 0.7 The S catalysts were mixed, and then ball milled for 20 minutes at a rotating speed of 300 rpm to obtain a mixture;

[0050] (2) Transfer the above mixture to a tube furnace, and feed it with argon. After 30 minutes, heat up under an argon protective atmosphere at a rate of 2°C.min -1 , heated to 300°C for calcination for 2h. Cool to room temperature, wash, filter to get the precipitate, and dry to obtain the phosphorus-doped Mn 0.3 Cd 0.7 S nanorod photocatalyst. The phosphorous doping Mn that embodiment 2 makes 0.3 Cd 0.7 S nanorod photocatalyst labeled 200P-Mn 0.3 Cd 0.7 S.

[0051] Under the irradiation of 300WXe lamp, under the condition of reaction temperature 15 ℃, the phosphorus-doped Mn prepared in embodiment 2 0.3 Cd 0.7 S nanorod photocatalyst (i.e. 200P-Mn 0.3 Cd 0.7 Th...

Embodiment 3

[0053] A phosphorus-doped Mn 0.3 Cd 0.7 The preparation method of S nanorod photocatalyst comprises the steps:

[0054] (1) 210mg of NaH 2 PO 2 ·H 2 O, 200 mg of Mn 0.3 Cd 0.7 The S catalysts were mixed, and then ball milled for 20min at a speed of 300rpm to obtain a mixture;

[0055] (2) Transfer the above mixture to a tube furnace, and feed it with argon. After 30 minutes, heat up under an argon protective atmosphere at a rate of 2°C.min -1 , heated to 300°C for calcination for 2h. Cool to room temperature, wash, filter to get the precipitate, and dry to obtain the phosphorus-doped Mn 0.3 Cd 0.7 S nanorod photocatalyst. The phosphorous doping Mn that embodiment 3 makes 0.3 Cd 0.7 S nanorod photocatalyst labeled as 210P-Mn 0.3 Cd 0.7 S.

[0056] Under the irradiation of a 300WXe lamp, when the reaction temperature was 15°C, the phosphorous-doped Mn prepared in Example 3 0.3 Cd 0.7 S nanorod photocatalyst (210P-Mn 0.3 Cd 0.7 The hydrogen production rate of S...

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Abstract

The invention discloses a phosphorus-doped Mn0.3Cd0.7S nanorod photocatalyst as well as a preparation method and an application thereof. The method comprises the following steps: uniformly mixing a phosphorus source with Mn0.3Cd0.7S, carrying out ball milling, and calcining the material at 200-400 DEG C for 1-3 hours under the protection of an inert atmosphere; cooling the material to room temperature, and washing, filtering and drying the cooled material to obtain the phosphorus-doped Mn0.3Cd0.7S nanorod photocatalyst. The prepared composite photocatalyst is of a rod-like structure, has a large length-diameter ratio, is beneficial to transfer and separation of photon-generated carriers, can significantly improve the problem of serious photo-corrosion phenomenon of sulfide catalysts, and shows a high photocatalytic hydrogen production rate. In addition, the raw materials used in the preparation method of the catalyst are cheap and easy to obtain, and the method is easy and convenient to operate, mild in reaction condition and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, a phosphorus-doped Mn 0.3 Cd 0.7 S nanorod photocatalyst and its preparation method and application. Background technique [0002] With the development of society and the improvement of people's living standards, the burning of fossil fuels has made environmental pollution and energy crisis more and more serious, and energy shortage has become one of the bottlenecks of sustainable development. In order to solve environmental and energy problems from the source, it is imminent to develop clean and renewable new energy. Semiconductor photocatalytic water splitting hydrogen production technology is favored by people because of its simple process, easy operation, clean and pollution-free. The key to semiconductor photocatalytic water splitting to produce hydrogen is to find a stable and efficient photocatalyst with a suitable band gap. [0003] mn x Cd 1-x S solid solution has a na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/187B01J35/02C01B3/04B01J35/00
CPCB01J27/187C01B3/042B01J35/39B01J35/00B01J35/30Y02E60/36
Inventor 董新法韩燕玲
Owner SOUTH CHINA UNIV OF TECH
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