Tantalum titanate cadmium sulphide platinum-carried laminated composite catalyst and its preparation method

A platinum catalyst and cadmium sulfide technology, which is applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor air oxidation resistance, intensified photocorrosion, and limited applications, etc. Improved photocorrosion ability, increased crystallinity, and good stability

Active Publication Date: 2006-07-19
陕西中核交大超洁能源技术有限公司
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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 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 in a cubic phase with lower activity without high temperature treatment, with poor crystallinity and a large amount of impurities may exist; Although the crystallinity has been improved, it either requires cumbersome follow-up treatment to remove a large num

Method used

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  • Tantalum titanate cadmium sulphide platinum-carried laminated composite catalyst and its preparation method
  • Tantalum titanate cadmium sulphide platinum-carried laminated composite catalyst and its preparation method
  • Tantalum titanate cadmium sulphide platinum-carried laminated composite catalyst and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 1) Potassium carbonate K 2 CO 3 , titanium dioxide TiO 2 and Tantalum Oxide 2 o 5 Mixed according to the stoichiometric ratio, wherein an excess of K is added 2 CO 3 , whose molar weight is 10%, calcined at 700°C for 1 hour, ground for 1-2 hours and then calcined at 1000°C for 12 hours to obtain potassium titanium tantalate KTiTaO 5 ;

[0050] 2) 10g potassium titanium tantalate KTiTaO 5 Place in 250ml of nitric acid with a concentration of 2mol / L, stir at room temperature for 2 days, wash the product with deionized water after ion exchange, until the pH of the washing residue is 5, and dry it at 80°C to obtain a layered matrix tantalum titanium Acid HTiTaO 5 ;

[0051] 3) 5g tantalum titanate HTiTaO 5 Place in 250ml of propylamine aqueous solution, volume ratio 1:1, reflux and stir at 40°C for 2 days to obtain propylamine pillars of layered matrix; place 5g of propylamine pillars of layered matrix in 250ml saturated cadmium acetate solution, 50°C Stir at -80...

Embodiment 2

[0055] 1) Potassium carbonate K 2 CO 3 , titanium dioxide TiO 2 and Tantalum Oxide 2 o 5 Mix according to the stoichiometric ratio, wherein an excess of potassium carbonate K is added 2 CO 3 , whose molar weight is 15%, calcined at 800°C for 1 hour, ground for 1 hour and then calcined at 1100°C for 24 hours to obtain potassium titanium tantalate KTiTaO 5 ;

[0056] 2) 10g potassium titanium tantalate KTiTaO 5 Place in 250ml of nitric acid with a concentration of 4mol / L, stir at room temperature for 2 days, wash the obtained product with deionized water after ion exchange, until the pH of the washing residue is 6, and dry at 90°C to obtain a layered matrix tantalum titanium Acid HTiTaO 5 ;

[0057] 3) 5g tantalum titanate HTiTaO 5 Place in 250ml of propylamine aqueous solution, volume ratio 1:1, reflux and stir at 50°C for 2 days to obtain propylamine pillars of layered matrix; place 5g of propylamine pillars of layered matrix in 250ml saturated cadmium acetate soluti...

Embodiment 3

[0061] 1) Potassium carbonate K 2 CO 3 , titanium dioxide TiO 2 and Tantalum Oxide 2 o 5 Mixed according to the stoichiometric ratio, wherein an excess of K is added 2 CO 3 , whose molar weight is 25%, calcined at 900°C for 2 hours, ground for 2 hours and then calcined at 1150°C for 24 hours to obtain potassium titanium tantalate KTiTaO 5 ;

[0062] 2) 10g potassium titanium tantalate KTiTaO 5 Place in 250ml of nitric acid with a concentration of 5mol / L, stir at room temperature for 3 days, wash the product with deionized water after ion exchange, until the pH of the washing residue is 7, and dry at 100°C to obtain a layered matrix tantalum titanium Acid HTiTaO 5 ;

[0063] 3) 5g tantalum titanate HTiTaO 5 Place in 250ml propylamine aqueous solution, volume ratio 1: 1, reflux and stir at 60°C for 3 days to obtain the propylamine pillars of the layered matrix; place 5g of the propylamine pillars of the layered matrix in 250ml saturated cadmium acetate solution, 70°C ...

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Abstract

The invention discloses a layered stromal HTiTaO5/CdS Pt-carrying new-typed composite catalyst and making method, which comprises the following steps: mixing K2CO3, Ta2O5 and TiO2 at chemical gauge rate; sintering to obtain the KTiTaO5 product; proceeding KTiTaO5 to obtain catalyst layered stromal HTiTaO5 through nitric ion exchange; exchanging the stromal HTiTaO5 with saturated cadmium acetate ion through pile-supported propanamine; vulcanizing the exchanged stromal HTiTaO5 in the pipe-typed furnace hydrogen sulfide atmosphere at high temperature to produce HTiTaO5/CdS; carrying Pt through photoreduction. The invention reaches the highest hydrogen-producing rate at 144umol/h and 6.3 percent quantum efficiency at 420 nm and 1.67 percent optical conversion efficiency for all-band of visible light, which improves the product activity.

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 raw material under the condition of simulating the visible light of the sun, and in particular to a composite tantalum titanate cadmium sulfide HTiTaO 5 / CdS supported platinum catalyst and preparation method thereof. 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 develop...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J37/08B01J37/30B01J37/16B01J35/02
Inventor 郭烈锦周海渊
Owner 陕西中核交大超洁能源技术有限公司
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