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Crown-shaped oxygen-deficient tin oxide nanosheet array structure and preparation method thereof

A nanosheet array and nanostructure technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, inorganic chemistry, etc., can solve the problems of low photocatalytic activity and low utilization rate of solar energy, etc. Increased specific surface area, controllable morphology, and good thermal stability

Inactive Publication Date: 2020-01-21
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, like titanium dioxide, tin dioxide has a larger band gap (about 3.6eV), and it can only show low photocatalytic activity even under ultraviolet light irradiation, and the utilization rate of solar energy is very low.

Method used

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  • Crown-shaped oxygen-deficient tin oxide nanosheet array structure and preparation method thereof
  • Crown-shaped oxygen-deficient tin oxide nanosheet array structure and preparation method thereof
  • Crown-shaped oxygen-deficient tin oxide nanosheet array structure and preparation method thereof

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preparation example Construction

[0035] The preparation method of the crown anoxic tin oxide nanosheet array structure proposed by the present invention includes the following steps and contents:

[0036] (1) First, put 20-60mL of deionized water in a beaker, then dissolve 2.0-4.2g of stannous chloride dihydrate and 2.6-6.0g of trisodium citrate in it, and magnetically stir for 20-40min to obtain uniform, Stable white thick suspension, and then slowly add absolute ethanol into the beaker according to the volume ratio of absolute ethanol: deionized water 1:1-1:4, and continue to stir for 30-60min to obtain a milky white turbid liquid precursor ,spare.

[0037] (2) Transfer the precursor solution to the high-pressure stainless steel reactor, and fix the clean nickel foam sheet horizontally on the bottom of the reactor. Then, after the sealing and assembly of the reaction kettle is completed, it is placed in an oven for heat preservation treatment. After naturally cooling to room temperature, the reactor was o...

Embodiment 1

[0043] Example 1: First, put 40 mL of deionized water in a beaker, then dissolve 3.61 g of stannous chloride dihydrate and 5.88 g of trisodium citrate in it, and magnetically stir for 40 min to obtain a uniform and stable white thick suspension. Then, slowly add absolute ethanol into the beaker according to the volume ratio of absolute ethanol: deionized water 1:1, and continue stirring for 60 min to obtain a milky white turbid liquid precursor, which is for later use. The precursor solution was transferred to a 100 mL high-pressure stainless steel reactor, and the clean nickel foam sheet was horizontally fixed on the bottom of the reactor. Then, after the sealing and assembly of the reaction kettle was completed, it was placed in an oven for 18 hours at 190°C. After naturally cooling to room temperature, the reactor was opened, and the nickel foam sample was taken out, rinsed three times with deionized water, and kept in an oven at 100 °C for 12 h to obtain the canopy anoxic ...

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Abstract

The invention relates to a crown-shaped oxygen-deficient tin oxide nanosheet array structure and a preparation method thereof, and belongs to the technical field of preparation and application of newenergy materials. According to the method, stannous chloride dihydrate and trisodium citrate dihydrate are used as raw materials, and the crown-shaped anoxic tin oxide nanosheet array structure is obtained through deposition and growth on a foamed nickel substrate by adopting a solvothermal method. The nanostructure is an array formed by a crown-like nanostructure in appearance, and each crown-like structure is formed by stacking oxygen-deficient tin oxide nanosheets in a staggered manner. The nanosheet array structure is large in specific surface area, small in material band gap, high in light absorption capacity, good in structural stability and thermal stability, non-toxic and harmless to a human body, and is an excellent visible light catalyst. The method is simple in raw material, equipment and technological process, clean, environment-friendly, mild in reaction condition, wide in applicability, high in technological parameter controllability, high in product yield, high in purityand easy to realize large-scale production.

Description

technical field [0001] The invention relates to a crown anoxic tin oxide nanosheet array structure and a preparation method thereof, belonging to the technical field of preparation and application of new energy materials. Background technique [0002] With the rapid development of modern industrial society, human's demand for energy and water resources is increasing. Moreover, with the over-exploitation and use of fossil energy, environmental pollution is becoming more and more serious. The development of new energy sources and water treatment technologies that can deal with new and complex environmental pollutants are currently important issues facing mankind. Among them, photocatalytic technology is of great significance for catalyzing hydrogen production and oxygen production and degrading wastewater pollutants. [0003] Sunlight is an inexhaustible and inexhaustible energy source for human beings, but the main component of sunlight is visible light, of which ultraviolet...

Claims

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Application Information

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IPC IPC(8): B01J23/835B01J35/02B01J35/10C01B3/04C02F1/30C02F101/30
CPCB01J23/835C02F1/30C01B3/042C01B2203/0277C01B2203/1058C02F2101/30C02F2305/10B01J35/39B01J35/40B01J35/61Y02E60/36
Inventor 田也彭志坚王琪符秀丽
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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