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Cobaltous selenide promoter as well as preparation method and application thereof

A co-catalyst and cobalt selenide technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low reaction efficiency and constraints, and achieve low auxiliary agent consumption and synthesis conditions Mild, green and less pollution effect

Active Publication Date: 2017-12-29
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

However, photocatalytic CO 2 The reduction reaction efficiency is low, which greatly restricts its practical application. The introduction of a co-catalyst is considered to be a way to improve the photocatalytic CO 2 Effective means of reducing efficiency, so the successful development and design of new high-efficiency co-catalysts is the use of solar energy to achieve CO 2 One of the key technologies for fixation and transformation

Method used

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  • Cobaltous selenide promoter as well as preparation method and application thereof
  • Cobaltous selenide promoter as well as preparation method and application thereof
  • Cobaltous selenide promoter as well as preparation method and application thereof

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preparation example Construction

[0026] The invention provides a kind of preparation method of cobalt selenide cocatalyst, and concrete scheme is as follows:

[0027] Step (1) dissolving the cobalt source compound in a solvent to obtain a cobalt source solution, and dissolving the selenium source compound in a solvent to obtain a selenium source solution;

[0028] Step (2) Add the selenium source solution dropwise to the cobalt source solution while stirring, continue to stir for 30-180 minutes after the dropwise addition, then move it into a high-pressure reactor, and keep the temperature at 90-240°C for 12-24°C. Hours, the obtained precipitate was washed by centrifugation with water and ethanol until the total ion concentration was less than 10ppm, then dried at 40-120°C for 6-24 hours, and ground to obtain cobalt selenide co-catalyst powder.

[0029] The cobalt source compound in the step (1) is one of cobalt chloride, cobalt acetate, cobalt nitrate and cobalt sulfate.

[0030] The selenium source compoun...

Embodiment 1

[0039] Weigh 0.249 g Co(Ac) 2 ·H 2 O and 0.173 g Na 2 SeO 3 Dissolve in 40 mL diethylenetriamine (DETA) and deionized water (H 2 O) mixed solution (V H2O :V DETA =2:1), the Na 2 SeO 3 The solution is slowly dropped into Co(Ac) 2 ·H 2 O solution, continued to stir for 30 min, transferred to a 100 mL autoclave, heated at 180 °C for 16 h, cooled to room temperature, washed by centrifugation, and dried in vacuum at 80 °C for 12 h to obtain Co 0.85 Se;

[0040] figure 1 Prepare the X-ray diffraction figure of material for this embodiment, from figure 1 It can be seen that the prepared sample is hexagonal Co 0.85 Se (JCPDS: 52-1008).

[0041] figure 2 It is the preparation of Co in Example 1 0.85 SEM images of Se samples, from figure 2 It can be seen that the sample exhibits a nano-layered morphology.

[0042] Co 0.85 Se materials as cocatalysts for photocatalytic reduction of CO 2 , the reaction was carried out in a self-made atmospheric pressure batch reaction...

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Abstract

The invention provides a cobaltous selenide promoter Co0.85Se as well as a preparation method and application thereof and belongs to the field of photocatalysis. The promoter provided by the invention is a nano laminated material synthesized by using a solvothermal method. The material integrates advantages of electron transmission of transition metallic ions, large specific surface areas of two-dimensional materials, high activity exposure ratios, and the like, and performance of photocatalysis CO2 reduction reactions can be effectively improved. The cobaltous selenide promoter is simple and feasible in preparation method, gentle in reaction system condition and wide in application prospect in fields such as CO2 immobilization, conversion and the like with solar energy.

Description

technical field [0001] The invention belongs to the technical field of novel material preparation and photocatalytic carbon dioxide reduction, and specifically relates to a cobalt selenide co-catalyst and its preparation method and application. Background technique [0002] With the increasingly serious environmental problems such as the energy crisis and the greenhouse effect, the sustainable development of human society is facing great challenges. How to effectively use solar energy to realize the fixation and transformation of carbon dioxide has attracted widespread attention from all over the world. [0003] Using photocatalytic technology, the CO 2 Converted into more valuable chemical raw materials, such as CO, CH 4 、CH 3 OH, HCHO and HCOOH, etc., not only can achieve CO 2 The fixation of carbon dioxide can alleviate the greenhouse effect to a certain extent, and can also provide important chemical raw materials for human beings. Therefore, by photocatalytic techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J37/10C01B32/40C01B3/06
CPCC01B3/06B01J27/0573B01J37/10B01J35/30B01J35/23B01J35/39Y02E60/36Y02P20/133
Inventor 潘宝王传义马养民
Owner SHAANXI UNIV OF SCI & TECH
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