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Preparation for compound hollow sphere CdS-TiO* and application in photocatalytic hydrogen production by water decomposition

A technology for catalytic decomposition and hollow spheres, which is used in catalyst activation/preparation, physical/chemical process catalysts, hydrogen production, etc., to achieve the effects of improved hydrogen production efficiency, improved utilization efficiency, and simple and easy process.

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

AI Technical Summary

Problems solved by technology

Through the systematic novelty search of domestic and foreign patents, many patents related to the preparation of nano-hollow spheres have been retrieved [7-52], and the direct nano-CdS-TiO 2 There is only one patent for the preparation of hollow spheres [53]. The present invention uses template method-dipping method-sol-gel method to prepare composite CdS-TiO 2 Hollow spheres, and what document [6] and patent [53] report is the preparation method that adopts two kinds of solution reactions, therefore, the present invention is nano-CdS-TiO 2 The preparation method of hollow spheres is completely different from the method reported in literature [6] and patent [53]; the nano-CdS-TiO 2 Hollow spheres used in solar photocatalytic water splitting to produce hydrogen have no literature and patent reports

Method used

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  • Preparation for compound hollow sphere CdS-TiO* and application in photocatalytic hydrogen production by water decomposition
  • Preparation for compound hollow sphere CdS-TiO* and application in photocatalytic hydrogen production by water decomposition
  • Preparation for compound hollow sphere CdS-TiO* and application in photocatalytic hydrogen production by water decomposition

Examples

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Effect test

Embodiment 1

[0091] Weigh 15g of glucose solid powder, measure 150mL of deionized water, dissolve the glucose solid powder in deionized water, and stir evenly for 10min.

[0092] Pour the formed homogeneous solution into a polytetrafluoroethylene-lined autoclave (volume 200mL), put it in an electric heating box and heat it to 165°C, keep it warm for 5h, take it out and let it cool down to room temperature naturally. Filter, wash with deionized water and absolute ethanol three times respectively, and put the solid in a drying oven at 60° C. for 5 hours to obtain brown carbon nanospheres.

[0093] Weigh 60 g (5 mol) of the prepared brown carbon nanospheres, put them into a beaker of absolute ethanol, ultrasonicate for 30 min at a frequency of 31 Hz, and dry at 50° C. Weigh 42g (0.14mol) Cd(NO 3 ) 2 4H 2 O solid, was added to 80mL deionized water to prepare an aqueous solution. The solution was immersed in 60g carbon nanospheres, soaked for 2h, and dried at room temperature to obtain a co...

Embodiment 2

[0100] Weigh 1.25g of Na of the sacrificial agent respectively 2 S and 0.25g Na 2 SO 3 Dissolve in a 100mL Prex glass flat-bottomed reaction bottle with a flat lighted side containing 50mL of distilled water. Weigh the composite hollow sphere CdS-TiO prepared in Example 1 2 Add 0.10 g of nano powder into the reaction flask.

[0101] Put the reaction bottle on the magnetic stirrer to stir, insert the three-way sampling glass bottle stopper into the reaction bottle, use the xenon lamp as the simulated sun light source, turn on the xenon lamp constant current power supply, and filter out the ultraviolet light of λ2 Photocatalytic water splitting hydrogen production activity of the catalyst. The detection of hydrogen adopts TCD detector equipped with gas chromatograph and TDX-01 packed column. Solar visible light catalytic decomposition of water to produce H 2 The results are shown in Table 1.

[0102] Table 1: Composite hollow sphere CdS-TiO 2 Solar visible light catalytic...

Embodiment 3

[0105] Whole implementation step is identical with embodiment 1, and difference is: (1) take by weighing 24g (0.78mol) Cd (NO 3 ) 2 4H 2 O solid, join 80mL deionized water, be mixed with aqueous solution; (2) weigh 22.46g (0.0936mol) Na 2 S·9H 2 O solid, deionized water, prepared as an aqueous solution.

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Abstract

The invention discloses preparation for compound hollow sphere CdS-TiO* and application in photocatalytic hydrogen production by water decomposition. The preparation method uses inexpensive cadmium source and titanium source, adopts a hydrothermal method, a two-step impregnation method and a sol-gel method for preparing compound hollow sphere CdS-TiO* nanophase materials; and the technical process is simple and practicable and can realize scale production. CdS and TiO2 are compounded, which broadens the spectral response range of TiO2; the prepared compound hollow sphere CdS-TiO is used as photocatalyst for solar energy visible light catalyzing hydrogen production by water decomposition; compared with the TiO2 photocatalyst, the optical energy utilization ratio of the solar energy is substantially increased and the speed of hydrogen production is obviously increased.

Description

technical field [0001] The invention belongs to the preparation of nano composite material and its application in the field of new energy. Specifically related to a composite hollow sphere CdS-TiO 2 A preparation method of a nanometer material and the application of the material as a photocatalyst in hydrogen production from water splitting by solar visible light. Background technique [0002] Due to the long-term unrestrained exploitation of fossil energy, the energy shortage has attracted the attention of various countries in recent years, thus accelerating the pace of human exploration of new renewable energy. Hydrogen energy has become the focus of attention of the international community because of its clean combustion, green environmental protection, renewable and pollution-free. Countries are actively exploring many ways to obtain hydrogen energy. Using solar photocatalysis to split water to produce hydrogen is one of the most effective ways for circular economy and...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J21/06B01J37/10B01J37/02B01J35/08C01B3/04
CPCY02E60/364Y02E60/36Y02P20/133
Inventor 张耀君闵超李学进王亚超李圣
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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