Preparation for p-n junction hollow sphere and application in photocatalytic hydrogen production by water decomposition

A hollow sphere, p-n technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., to achieve simple and feasible process, increase hydrogen production yield, improve The effect of transmission efficiency

Inactive Publication Date: 2010-01-13
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Through the systematic novelty search of domestic and foreign patents, many patent reports on the preparation of nano-hollow spheres have been retrieved [9-55], and the direct preparation

Method used

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  • Preparation for p-n junction hollow sphere and application in photocatalytic hydrogen production by water decomposition
  • Preparation for p-n junction hollow sphere and application in photocatalytic hydrogen production by water decomposition
  • Preparation for p-n junction hollow sphere and application in photocatalytic hydrogen production by water decomposition

Examples

Experimental program
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Effect test

Example Embodiment

[0088] Example 1:

[0089] Weigh 15 g of glucose solid powder, measure 150 mL of deionized water, dissolve the glucose in deionized water, and stir uniformly for 10 minutes. Pour the formed homogeneous solution into a polytetrafluoroethylene-lined autoclave (200 mL in volume), put it in an oven and heat it to 165°C, keep it at 165°C for 5h, take it out and cool it naturally to room temperature. Filter, wash three times with deionized water and absolute ethanol, put the solid in a drying oven at 60° C. and dry for 5 hours to prepare brown carbon nanospheres.

[0090] Weigh 10g (0.83mol) of the prepared nano-carbon spheres, put them in a beaker, sonicate for 30min at a frequency of 31Hz, and dry at 50℃; weigh 7g (0.023mol) of Cd(NO 3 ) 2 ·4H 2 O solid was added to 20 mL of deionized water to prepare an aqueous solution. The solution was immersed in 10g carbon nanospheres, immersed for 2h, and dried at room temperature to prepare a composite of carbon nanospheres wrapped with cadmium...

Example Embodiment

[0095] Example 2:

[0096] Weigh 1.25g Na of the cavitation sacrificial agent 2 S and 0.25g Na 2 SO 3 Dissolve it into a 100mL Prex glass flat-bottomed reaction flask containing 50mL of distilled water with a flat side on the illuminated side. Weigh 0.10 g of the p-n junction hollow spherical NiO-CdS nanocomposite material prepared in Example 1 and add it into the reaction flask.

[0097] Place the reaction flask on a magnetic stirrer and stir, insert the three-way sampling glass stopper into the reaction flask, use the xenon lamp as the simulated solar light source, turn on the xenon lamp steady current power supply, and filter out the ultraviolet light with λ2 The results are shown in Table 1.

[0098] Table 1. P-n junction hollow sphere NiO-CdS solar energy visible light catalytic decomposition of aquatic H 2 result

[0099]

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Abstract

The invention discloses preparation for p-n junction hollow sphere TiO-CdS nanophase compound material and application in photocatalytic hydrogen production by water decomposition; the method uses inexpensive cadmium source and nickel source, adopts a hydrothermal method, a synthesis method, and a four-step impregnation method for compounding an n-NiO semiconductor and a p-CdS semidconductor to prepare the p-n junction hollow sphere TiO-CdS nanophase compound material; and the technical process is simple and practicable and can realize scale production. The p-n junction hollow sphere TiO-CdS nanophase compound material is used as photocatalyst for solar energy visible light catalyzing hydrogen production by water decomposition, speeds up the conveying rate of photo-generated electrons and substantially increases yield of the hydrogen production.

Description

technical field [0001] The invention belongs to the preparation of nano composite material and its application in the field of new energy. Specifically relates to a preparation method of a p-n junction hollow sphere NiO-CdS nanocomposite material and the prepared p-n junction hollow sphere NiO-CdS nanocomposite material is used as a photocatalyst for solar visible light catalytic decomposition of water to produce hydrogen. Background technique [0002] In recent years, the greenhouse effect caused by energy shortage and the use of fossil energy has brought new challenges to the sustainable development of the global economy. Therefore, strengthening energy technology innovation and developing new energy sources not only affects the living environment of human beings today, but also concerns the future development of human beings. Developing clean energy, improving energy efficiency, promoting energy conservation and reducing emissions are becoming the common goals of all cou...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J23/755B01J37/10B01J37/02B01J35/08C01B3/04
CPCY02E60/364Y02E60/36Y02P20/133
Inventor 张耀君李学进闵超王亚超李圣
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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