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A method for preparing cds/mos2 composite hollow square photocatalyst

A photocatalyst and block technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., to achieve the effect of complete crystallization and good dispersion

Inactive Publication Date: 2018-11-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, building a high-performance hollow square CdS / MoS with a uniform structure 2 There are no reports on heterojunction composite photocatalysts

Method used

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  • A method for preparing cds/mos2 composite hollow square photocatalyst
  • A method for preparing cds/mos2 composite hollow square photocatalyst
  • A method for preparing cds/mos2 composite hollow square photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1CdS / MoS 2 Preparation of composite photocatalyst

[0014] Select 300mg of cadmium carbonate, sodium molybdate and 500mg of thiourea. The amount of sodium molybdate added is 1:0:4, 1:0.15:4, 1:0.3:4, 1:0.6:4 according to the ratio of the amount of substance. , 1:1.2:4, 1:1.4:4 were added, and 6 groups of samples were dissolved in 35ml of deionized water, magnetically stirred, and hydrothermally reacted at 220 degrees Celsius for 24 hours. After the reaction, the resulting products were sequentially deionized Wash with water and ethanol, filter, and place in a constant temperature drying oven at 60 degrees Celsius to dry.

Embodiment 2

[0015] Example 2CdS / MoS 2 Characterization and Analysis of Heterojunction Composite Photocatalyst

[0016] Such as figure 1 As shown, it can be seen from the figure that there are CdS and MoS 2 Diffraction peaks and no other impurity phases indicate that the purity of the composite structure we obtained is high.

[0017] Such as figure 2 As shown, the uniformly distributed hollow square structure can be seen from the figure.

[0018] Such as image 3 As shown, you can see MoS 2 The nanosheets were successfully coated on the surface of the CdS hollow square to form a heterogeneous structure.

[0019] Such as Figure 4 As shown, the CdS / MoS can be clearly seen in the figure 2 The composite photocatalyst has excellent photocatalytic hydrogen production performance. When the ratio of cadmium carbonate, sodium molybdate and thiourea is 1:1.2:4, the photocatalytic hydrogen production efficiency is the highest.

Embodiment 3

[0020] Example 3CdS / MoS 2 Visible light catalytic activity experiment of heterojunction composite photocatalyst

[0021] (1) Weigh CdS / MoS 2 100mg of composite photocatalyst was placed in a photocatalytic hydrogen production reactor, 100ml of water was added, and 10ml of lactic acid was stirred for 20 minutes.

[0022] (2) The amount of hydrogen generated is measured by gas chromatography every 1 hour.

[0023] (3) by Figure 4 It can be seen that the prepared composite photocatalyst has excellent visible light catalytic activity, and the composite sample has higher hydrogen production performance than pure CdS.

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Abstract

The invention relates to the technical field of composite nanomaterials and in particular discloses a method for preparing a CdS / MoS2 composite hollow-block photocatalyst by taking cadmium acetate, sodium bicarbonate, PVP, sodium molybdate and thiourea as raw materials, particularly a method for preparing a component photocatalyst with the advantages of simple preparation process and excellent visible-light catalytic activity of the product. The method comprises the following steps: weighing cadmium acetate and PVP, and dissolving in deionized water according to a mass ratio of 1:10; adding sodium bicarbonate into the mixture, so that the mass ratio of the cadmium acetate to sodium bicarbonate is 1:2; stirring and reacting at room temperature for 2 hours, washing and centrifuging the product after the reaction is completed, thereby obtaining cadmium carbonate; dissolving the cadmium carbonate, sodium molybdate and thiourea in the deionized water according to a mass ratio of (1):(0.15-1.4):(4), mixing and stirring, carrying out a hydrothermal reaction under the condition of 220 DEG C for 24 hours, washing and centrifuging the product after the reaction is completed, and drying, thereby obtaining the CdS / MoS2 composite photocatalyst.

Description

Technical field [0001] The present invention relates to the technical field of composite nano materials, and specifically refers to a preparation of CdS / MoS using cadmium acetate, sodium bicarbonate, PVP, sodium molybdate, and thiourea as raw materials 2 The method of composite hollow square photocatalyst, especially a preparation method of composite photocatalyst with simple preparation process and good visible light catalytic activity. technical background [0002] Since the 21st century, resource depletion and environmental pollution caused by the extensive use of fossil fuels have made the development and utilization of environmentally friendly new clean energy increasingly urgent. Among them, hydrogen energy, as the most potential clean energy source, has attracted a lot of research investment. Photo-splitting water to produce hydrogen is a promising technology that can convert solar energy to chemical energy, and the pollution-free combustion process of hydrogen energy gives...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J35/02B01J37/10
CPCB01J27/051B01J35/004B01J35/02B01J37/10
Inventor 蔡晓毓刘瑜
Owner JIANGSU UNIV
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