CdS/Ti-MCM-41 loaded platinum photo catalyst and its preparation method

A technology of photocatalyst and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc. Effects of improved photocorrosion ability and improved hydrogen production activity

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)
[0013] From the above description of the prior art, it can be seen that the cadmium sulfide prepared by the traditional co-precipitation method mostly exists in a cubic phase with low activity without high temperature treatment, with poor crystallinity and a large amount of impurities may exist; Although its crystallinity can be improved, it either requires cumbersome subsequent treatment to remove a large number of by-products produced by heat treatment, or has poor oxidation resistance in air, which in turn leads to increased photocorrosion in the photocatalytic hydrogen production process.

Method used

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  • CdS/Ti-MCM-41 loaded platinum photo catalyst and its preparation method
  • CdS/Ti-MCM-41 loaded platinum photo catalyst and its preparation method
  • CdS/Ti-MCM-41 loaded platinum photo catalyst and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 1) In a water bath at 40°C, dissolve 0.36g of sodium hydroxide NaOH and 1.82g of cetyltrimethylammonium bromide CTAB in 45mL of deionized water, and slowly drop into 8.21mL of tetraethylorthosilicate with a pipette Ester TEOS, stirred at a speed of 800rpm to facilitate the hydrolysis of TEOS; 0.25g of tetrabutyl titanate TBOT was added dropwise after 0.5h, and the solution was transferred to a hydrothermal kettle with a Teflon liner after continuing to stir for 1h. Crystallized at 100°C for 72h. After the hydrothermal kettle was lowered to room temperature, the solution was filtered, repeatedly washed with deionized water and dried to obtain white raw powder CTAB / Ti-MCM-41;

[0050] 2) Calcining 2g of white raw powder CTAB / Ti-MCM-41 in air atmosphere at 500°C for 10h to remove template agent CTAB to obtain mesoporous matrix Ti-MCM-41;

[0051] 3) 1.25g cadmium acetate CdAc 2 Dissolve in 100mL methanol MeOH, add 1.0g CTAB / Ti-MCM-41 raw powder, and reflux at the boiling...

Embodiment 2

[0061] 1) In a water bath at 60°C, dissolve 0.72g of sodium hydroxide NaOH and 3.64g of cetyltrimethylammonium bromide CTAB in 90mL of deionized water, and slowly drop into 16.4mL of tetraethylorthosilicate with a pipette Ester TEOS, stirred at a speed of 500rpm to facilitate the hydrolysis of TEOS; 0.25g of tetrabutyl titanate TBOT was added dropwise after 1h, and after stirring for 1h, the solution was transferred to a hydrothermal kettle with a polytetrafluoroethylene liner and placed in Crystallized at 100°C for 72h. After the hydrothermal kettle was lowered to room temperature, the solution was filtered, repeatedly washed with deionized water and dried to obtain white raw powder CTAB / Ti-MCM-41;

[0062] 2) Calcining 2g of white raw powder CTAB / Ti-MCM-41 in air atmosphere at 500°C for 5h to remove template agent CTAB to obtain mesoporous matrix Ti-MCM-41;

[0063] 3) 1.25g cadmium acetate CdAc 2 Dissolve in 100mL methanol MeOH, add 1.0g CTAB / Ti-MCM-41 raw powder, and ref...

Embodiment 3

[0073] 1) In a water bath at 40°C, dissolve 0.72g of sodium hydroxide NaOH and 3.64g of cetyltrimethylammonium bromide CTAB in 90mL of deionized water, and slowly drop into 16.4mL of tetraethylorthosilicate with a pipette Ester TEOS, stirred at a speed of 800rpm to facilitate the hydrolysis of TEOS; 0.25g of tetrabutyl titanate TBOT was added dropwise after 1h, and after stirring for 1h, the solution was transferred to a hydrothermal kettle with a polytetrafluoroethylene liner and placed in Crystallized at 110°C for 48h. After the hydrothermal kettle was lowered to room temperature, the solution was filtered, repeatedly washed with deionized water and dried to obtain white raw powder CTAB / Ti-MCM-41;

[0074] 2) Calcining 2g of white raw powder CTAB / Ti-MCM-41 in air atmosphere at 600°C for 5h to remove template agent CTAB to obtain mesoporous matrix Ti-MCM-41;

[0075] 3) 2.5g cadmium acetate CdAc 2Dissolve in 200mL methanol MeOH, add 2.0g CTAB / Ti-MCM-41 raw powder, and reflu...

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Abstract

A photocatalyst Pt-carried CdS / Ti-MCM-41 for generating H2 by optical catalytic reaction is prepared through providing CTAB as template agent, hydrothermal reaction to synthesize CTAB / Ti-MCM-41, ion exchange to obtain Cd / Ti-MCM-41, sulfurizing in HS gas to obtain CdS / Ti-MCM-41 and carrying Pt by optical reduction method. It has high H2 output rate.

Description

technical field [0001] The present invention relates to the field of hydrogen energy preparation, and relates to the photocatalytic clean preparation technology of hydrogen energy, that is, the photocatalytic decomposition hydrogen production technology using water as a raw material under the condition of simulating the visible light of the sun, in particular to a composite mesoporous matrix CdS / Ti -MCM-41 supported platinum photocatalyst and its preparation method. 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 emission reduction and the problem of energy consumption in rural and remote areas have made my country face multiple pressures, prompting people to look for new clean alternative energy sources. Vigorously strengthening the basic theoretical research on the conversion and utilization of renewable energy, and developing high-quality...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J23/42B01J29/06B01J37/30B01J37/16C01B39/06
Inventor 郭烈锦沈少华
Owner XI AN JIAOTONG UNIV
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