FexP/Mn0. 3Cd0.7S composite photocatalyst, and preparation method and application thereof

A catalyst and composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen/syngas production, etc., can solve the problems of poor stability and high toxicity of phosphide, achieve rich content and inhibit photocorrosion phenomenon , The effect of excellent hydrogen production stability

Inactive Publication Date: 2020-04-21
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For existing Mn x Cd 1-x The photocorrosion phenomenon of S catalyst is serious, the stability is poor, and the toxicity of the phosphide preparation process is relatively large. The purpose of the present invention is to provide an environmentally friendly, non-toxic, stable and efficient Fe x P / Mn 0.3 Cd 0.7 S composite photocatalyst and its preparation method and application

Method used

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  • FexP/Mn0. 3Cd0.7S composite photocatalyst, and preparation method and application thereof
  • FexP/Mn0. 3Cd0.7S composite photocatalyst, and preparation method and application thereof
  • FexP/Mn0. 3Cd0.7S composite photocatalyst, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0045] A kind of Fe x P / Mn 0.3 Cd 0.7 The preparation method of S composite photocatalyst includes the following steps:

[0046] (1) Put 500mg of Mn 0.3 Cd 0.7 The S catalyst was added to 50mL ethanolamine solvent, stirred uniformly, and then dispersed uniformly by ultrasonic to obtain a suspension;

[0047] (2) Put 54mg of FeCl under stirring 3 ·6H 2 O and 25mg of pretreated red phosphorus were added to the suspension described in step (1), stirred uniformly, dispersed uniformly by ultrasound to form a uniformly dispersed suspension; then transferred and sealed in a reactor equipped with a polytetrafluoroethylene liner , Heat up to 180℃ for solvothermal reaction, the time of solvothermal reaction is 12h, cool to room temperature, filter the precipitate, wash and dry to obtain Fe x P and Mn 0.3 Cd 0.7 The molar ratio of S is 5mol% Fe x P / Mn 0.3 Cd 0.7 S composite photocatalyst, labeled as 5mol% Fe x P / Mn 0.3 Cd 0.7 S.

[0048] Performance test: under the irradiation of 300W Xe lamp, ...

Embodiment 2

[0050] A kind of Fe x P / Mn 0.3 Cd 0.7 The preparation method of S composite photocatalyst includes the following steps:

[0051] (1) Put 500mg of Mn 0.3 Cd 0.7 The S catalyst was added to 50mL ethanolamine solvent, stirred uniformly, and then dispersed uniformly by ultrasonic to obtain a suspension;

[0052] (2) Add 107mg of FeCl under stirring 3 ·6H 2 O and 49 mg of the pretreated red phosphorus were added to the suspension described in step (1), stirred uniformly, and dispersed uniformly by ultrasound to form a uniformly dispersed suspension. Then it was transferred and sealed in a reactor equipped with a polytetrafluoroethylene liner. The temperature was raised to 180°C for solvothermal reaction. The solvothermal reaction time was 12h, cooled to room temperature, filtered, washed, and dried to obtain Fe x P and Mn 0.3 Cd 0.7 The molar ratio of S is 10mol% Fe x P / Mn 0.3 Cd 0.7 S composite photocatalyst, labeled as 10mol% Fe x P / Mn 0.3 Cd 0.7 S.

[0053] Performance test: Under the ...

Embodiment 3

[0055] A kind of Fe x P / Mn 0.3 Cd 0.7 The preparation method of S composite photocatalyst includes the following steps:

[0056] (1) Put 500mg of Mn 0.3 Cd 0.7 S catalyst was added to 50mL ethanolamine solvent, stirred uniformly, and then dispersed uniformly by ultrasonic to obtain a suspension;

[0057] (2) Add 213mg of FeCl under stirring 3 ·6H 2 O and 98 mg of pretreated red phosphorus were added to the suspension described in step (1), stirred uniformly, and dispersed uniformly by ultrasonic to form a uniformly dispersed suspension; then transferred and sealed in a reactor equipped with a polytetrafluoroethylene liner , Heat up to 180℃ for solvothermal reaction, the time of solvothermal reaction is 12h, cool to room temperature, filter the precipitate, wash, and dry to obtain Fe x P and Mn 0.3 Cd 0.7 The molar ratio of S is 20mol% Fe x P / Mn 0.3 Cd 0.7 S composite photocatalyst, labeled as 20mol% Fe x P / Mn 0.3 Cd 0.7 S.

[0058] Performance test: under the irradiation of 300W Xe l...

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Abstract

The invention discloses a preparation method and an application of an FexP / Mn0.3Cd0.7S composite photocatalyst. The method comprises the following steps: adding Mn0.3Cd0.7S into ethanolamine, and uniformly dispersing to obtain a suspension; and adding FeCl3.6H2O and red phosphorus subjected to grinding pretreatment into the suspension, carrying out a solvothermal reaction, and performing filteringand drying to obtain the FexP / Mn0.3Cd0.7S composite photocatalyst. The composite photocatalyst provided by the invention is of a rod-like structure, has a large length-diameter ratio, and is beneficial to transfer and separation of photon-generated carriers; amorphous FexP is loaded on Mn0.3Cd0.7S nanorods, the short-range ordered structure and defect sites can provide many reaction active sites,Fe-S bonds are formed between the short-range ordered structure and the defect sites, so the migration rate of the photon-generated carriers can be increased, and the sulfide catalyst has high photocatalytic hydrogen production activity, and the problem of poor stability of the sulfide catalyst is remarkably improved.

Description

Technical field [0001] The invention belongs to the technical field of catalyst preparation, and specifically relates to a Fe x P / Mn 0.3 Cd 0.7 S composite photocatalyst and its preparation method and application. Background technique [0002] Solar energy photocatalytic decomposition of water to produce hydrogen can convert resource-rich solar energy into clean and efficient hydrogen energy. It is considered to be one of the effective technologies to solve energy and environmental problems. The key is to find a stable and efficient photocatalyst. Sulfide solid solution photocatalysts have gradually become a hot spot in the research field because of their adjustable conduction band and valence band positions and large visible light response range. However, when the sulfide photocatalyst is used in the photocatalytic water splitting reaction, due to the easy recombination of photo-generated carriers and serious photo-corrosion phenomenon, the hydrogen production rate is low and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/187B01J35/00B01J35/02C01B3/04
CPCB01J27/187B01J35/004B01J35/02C01B3/042C01B2203/1088C01B2203/1094Y02E60/36
Inventor 韩燕玲董新法
Owner SOUTH CHINA UNIV OF TECH
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