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Preparation method, product and use of micro/nano heretically-structured insert octahedral Zn2SnO4

A hierarchical structure, octahedral technology, applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, photosensitive equipment, etc., can solve problems such as unfavorable improvement of DSSC conversion rate, complex operation, multiple energy sources, etc., to improve photoelectric conversion efficiency. , The operation is simple and easy, and the effect of large application potential

Inactive Publication Date: 2012-01-04
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these synthetic methods can obtain Zn 2 SnO 4 , but the disadvantages are very obvious. In the second step of the two-step method, the product synthesized in the first step is used as the reactant. The operation is more complicated, high-temperature burning, and consumes more energy.
In the gas phase method, the gas sintering temperature is higher, which greatly increases the cost
In addition, since the structure, size and shape of the particles have an important impact on their optical and electrical properties, the shapes of the particles synthesized by these two methods are mostly spherical, which is not conducive to improving the conversion rate of DSSC.

Method used

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  • Preparation method, product and use of micro/nano heretically-structured insert octahedral Zn2SnO4
  • Preparation method, product and use of micro/nano heretically-structured insert octahedral Zn2SnO4
  • Preparation method, product and use of micro/nano heretically-structured insert octahedral Zn2SnO4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Add 0.6mmol of tin tetrachloride pentahydrate, 1.2mmol of zinc acetate dihydrate and 7.2mmol of sodium hydroxide to 30ml of aqueous solution in which 2mmol of L-tryptophan has been dissolved, and magnetically stir for 0.5~1h to obtain a white suspension Turbid liquid

[0041] (2) Pour the white suspension into a 50ml stainless steel autoclave lined with polytetrafluoroethylene, raise the temperature to 200°C, react for 24h, and cool down in the furnace after the reaction;

[0042] (3) Centrifugally separate the reaction product to obtain solid powder, then wash with distilled water, and then dry in an oven at a drying temperature of 60°C and a time of 24 hours to obtain a micro / nano hierarchical structure insert octahedral Zn 2 SnO 4 .

[0043] X-ray diffraction (XRD), photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to analyze the products.

[0044] figure 1 Is the XRD pattern of the product of Exampl...

Embodiment 2

[0048] The raw materials and operations are basically the same as those in Example 1, except that the reaction time in step (2) is 10 hours, and the drying time in step (3) is 6 hours.

[0049] The XRD spectrum of the product of Example 2 is shown in Figure 5 (a), the product ingredient is Zn 2 SnO 4 .

[0050] Reference Image 6 , The structure of the product of Example 2 is basically the same as that of Example 1, which is a micro / nano hierarchical structure insert octahedron Zn 2 SnO 4 , The side length of the octahedron is 1.5-2μm, but the hexagonal Zn on the octahedron 2 SnO 4 The inserts are relatively sparse.

Embodiment 3

[0052] The raw materials and operation are basically the same as in Example 1, except that the reaction time in step (2) is 20h.

[0053] Reference Figure 7 , The structure of the product in Example 3 is basically the same as the product in Example 1, which is a micro / nano hierarchical structure insert octahedral Zn 2 SnO 4 .

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Abstract

The invention relates to a method for preparing micro / nano heretically-structured insert octahedral Zn2SnO4, which comprises the following steps: firstly, reacting a tintetrachloride compound, a zinc acetate compound and an alkali metal hydroxide in water in the presence of L-tryptophan and uniformly dispersing; secondly, reacting in a high-pressure kettle, wherein the reaction temperature is controlled to be 170 to 200 DEG C; and finally, separating the product of the reaction, drying and obtaining the micro / nano heretically-structured insert octahedral Zn2SnO4. In the method, the molar ratio of tintetrachloride compound to zinc acetate compound and to alkali metal hydroxide is 1:(2-3):(8-12), and the molar ratio of L-tryptophan to tintetrachloride compound is (5-10):3. The invention also relates to the micro / nano heretically-structured insert octahedral Zn2SnO4 prepared by the method and the use of the micro / nano heretically-structured insert octahedral Zn2SnO4 in electrodes of dye sensitized solar cells and photocatalytic reduction of CO2.

Description

Technical field [0001] The present invention relates to a kind of Zn 2 SnO 4 Preparation method, product and application of micro / nano hierarchical structure insert octahedron. Background technique [0002] As the energy crisis and environmental pollution problems become more and more serious, all sectors of the society are paying more and more attention to the sustainable development of energy consumption, which has aroused the attention and favor of governments of all countries on clean and renewable energy. New energy has become the international academic community and countries The focus of research and development. As a kind of renewable energy, solar energy has the incomparable advantages of other energy sources. It is inexhaustible, inexhaustible, safe, pollution-free, and not restricted by geographical conditions, making it one of the main directions of new energy development. . [0003] In recent years, people have developed a novel solar cell-dye-sensitized solar cell (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00B01J23/62C07C9/04C07C1/02H01G9/04H01G9/20H01M14/00H01L51/44
CPCY02E10/542Y02E10/549
Inventor 周勇李政道邹志刚
Owner NANJING UNIV