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Method for preparing photocatalyst of platinum-carried cadmium sulfide

A photocatalyst, cadmium sulfide technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. The effects of improved photocorrosion ability, improved hydrogen production activity, and easy operation

Inactive Publication Date: 2007-11-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation of hexagonal cadmium sulfide by liquid phase method at low temperature has been realized, the crystallinity is generally poor (see Chinese patents CN1504825, CN1556028)
[0012] From the elaboration of the above prior art, it can be seen that, on the one hand, the cadmium sulfide prepared by the traditional method mostly exists as a cubic phase with lower activity without high-temperature treatment, and the crystallinity is poor, and there may be a large amount of impurities; Although the crystallinity has been improved, it either requires cumbersome follow-up treatment to remove a large number of by-products produced by heat treatment, or the anti-oxidation ability in the air is deteriorated, which in turn leads to the intensification of photocorrosion in the process of photocatalytic hydrogen production
On the other hand, after years of research and exploration, although a large number of new visible light-responsive photocatalysts have been reported internationally, their activity is generally low.
Although the cadmium sulfide prepared by the traditional method has high activity, it is easily corroded by light, which limits its application in the field of photocatalytic hydrogen production.

Method used

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  • Method for preparing photocatalyst of platinum-carried cadmium sulfide
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  • Method for preparing photocatalyst of platinum-carried cadmium sulfide

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1) Spread 2g of cadmium acetate evenly in the magnetic boat, place it in the center of the quartz tube furnace, raise the temperature of the quartz tube furnace to 400°C at a heating rate of 10°C / min, and thermally decompose cadmium acetate at this temperature for 1 hour , and then lowered to room temperature to obtain a cadmium oxide precursor.

[0031] 2) Select dry hydrogen sulfide to pass into the quartz tube furnace at a flow rate of 5ml / min, raise the temperature of the quartz tube furnace to 400°C at a rate of 10°C / min, and heat the cadmium oxide precursor at 400°C Vulcanization 4h.

[0032] 3) Turn off the quartz tube furnace. Under the hydrogen sulfide atmosphere, the quartz tube furnace cools down naturally. At 50°C, turn off the hydrogen sulfide gas, and continue cooling to room temperature to obtain cadmium sulfide.

[0033] 4) Loading the prepared cadmium sulfide on the noble metal platinum by photoreduction method to obtain the platinum-loaded cadmium sul...

Embodiment 2

[0036] The difference between this embodiment and Example 1 is that the quartz tube furnace in step 1) is raised to 300°C, and the quartz tube furnace in step 2) is raised to 400°C. The rest are the same as in Example 1, and can also be obtained Platinum-supported cadmium sulfide photocatalyst.

Embodiment 3

[0038] This embodiment is different from Example 1 in that the quartz tube furnace in step 1) is raised to 400°C, and the quartz tube furnace in step 2) is raised to 300°C, and the rest are the same as in Example 1, and can also be obtained Platinum-supported cadmium sulfide photocatalyst.

[0039]The difference between this embodiment and Example 1 is that the quartz tube furnace in step 1) is raised to 500°C, and the quartz tube furnace in step 2) is raised to 400°C. The rest are the same as in Example 1, and can also be obtained Platinum-supported cadmium sulfide photocatalyst.

[0040] The above experimental examples can also be cited, as long as it is within the scope of the present invention, suitable cadmium sulfide can be obtained, but in order to further simplify the process, the parameters of experimental example 1 are the optimal choice.

[0041] Referring to Fig. 1, Fig. 1 has provided the X-ray diffraction pattern (XRD) of the decomposition product of cadmium ace...

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Abstract

A process for preparing the Pt-carried cadmium sulfide as photocatalyst used to prepare H2 includes such steps as thermal decomposition of cadmium acetate at 300-600 deg.C to obtain cadmium oxide, thermal sulfurizing at 200-400 deg.C to obtain cadmium sulfide and carrying Pt by optical reduction method. Its advantages are high activity to generate H2 and high stability for resisting surface oxidization and optical corrosion.

Description

technical field [0001] The invention belongs to the field of hydrogen energy preparation, and relates to a photocatalytic clean preparation technology of hydrogen energy, that is, a photocatalytic decomposition hydrogen production technology using water as a raw material under the condition of simulating the visible light of the sun. In particular, it relates to a preparation method of a platinum-loaded cadmium sulfide photocatalyst. The surface of the cadmium sulfide prepared by the method has a special nano-step shape, and the existence of the shape makes the cadmium sulfide visible light photocatalytic decomposition of water for hydrogen production after platinum loading. Greatly improved, with high photocatalytic hydrogen production activity and high stability. Background technique [0002] Insufficient supply of conventional primary energy, shortage of liquid fuels, serious pollution caused by the use of fossil energy, CO 2 The pressure of emis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/16B01J23/42C01B3/02
Inventor 郭烈锦敬登伟
Owner XI AN JIAOTONG UNIV
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