Method for synthesizing catalyst capable of efficiently decomposing hydrazine at room temperature

A technology for catalytic decomposition and nano cobalt selenide, which is applied in chemical instruments and methods, physical/chemical process catalysts, cobalt compounds, etc., can solve the problems of cobalt selenide synthesis and less application, and achieve small product particles and large specific surface area , Thin effect

Inactive Publication Date: 2011-10-26
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In summary, there is still less research on the synthesis and application of cobalt selenide

Method used

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  • Method for synthesizing catalyst capable of efficiently decomposing hydrazine at room temperature
  • Method for synthesizing catalyst capable of efficiently decomposing hydrazine at room temperature
  • Method for synthesizing catalyst capable of efficiently decomposing hydrazine at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of cobalt selenide nanosheets under different conditions:

[0032] This step is the stage of exploring conditions for preparing the product cobalt selenide nanosheets. (1) Add 0.1455 grams of cobalt nitrate hexahydrate and 0.0866 grams of sodium selenite to 25 milliliters of autoclaves with Teflon liners, then add 18 milliliters of distilled water, then add 2 milliliters of hydrazine hydrate (>85 %), after stirring for 20 minutes, seal the reaction kettle, put it into a digital display temperature control furnace, and react at 100, 120, 160, and 180 degrees Celsius for 24 hours respectively. (2) Add 0.1455 grams of cobalt nitrate hexahydrate and 0.0866 grams of sodium selenite to a 25 milliliter autoclave with a Teflon liner, then add 18 milliliters of distilled water, then add 2 milliliters of hydrazine hydrate (>85 %), after stirring for 20 minutes, close the reaction kettle, put it into a digital display temperature control furnace, and rea...

Embodiment 2

[0039] Embodiment 2: preparation of cobalt selenide nanosheets by hydrothermal reaction:

[0040] 0.1455 g of cobalt nitrate hexahydrate and 0.0866 g of sodium selenite were added to a 25 ml Teflon-lined autoclave, followed by 18 ml of distilled water, followed by 2 ml of hydrazine hydrate (>85%), After stirring for 20 minutes, the reaction kettle was sealed, put into a digital display temperature control furnace, and reacted at 140 degrees Celsius for 24 hours. The obtained product was washed with distilled water and ethanol several times and then dried for characterization and testing.

[0041] The morphology of the obtained samples was characterized by a Hitachi scanning microscope S4800 (SEM), and the phase of the samples was characterized by a Philips X’Pert PRO SUPER X-ray diffractometer (XRD). The specific surface area and micropore distribution of the sample were analyzed by the automatic microporous physical adsorption and chemical adsorption analyzer of Micromeritic...

Embodiment 3

[0045] Example 3: Preparation of cobalt selenide nanosheets at room temperature

[0046] Add 0.7275 g of cobalt nitrate hexahydrate and 0.4330 g of sodium selenite to a 250 ml Erlenmeyer flask, then add 90 ml of distilled water, then add 10 ml of hydrazine hydrate (> 85%), stir for 20 minutes, then seal the reaction vessel , reacted at room temperature for 48 hours. The obtained product was washed with distilled water and ethanol several times and then dried for characterization and testing.

[0047] The phase of the sample was characterized by Philips X’Pert PRO SUPER X-ray diffractometer (XRD), the morphology of the sample was characterized by the Hitachi scanning microscope S4800, and the catalytic properties of the sample were tested by Shimadzu-3600.

[0048] Figure 9 , Figure 10 It is an electronic scanning photo of the product of this example, showing that the product is composed of selenium-cobalt compound flakes with a thickness less than 10 nanometers, and the s...

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Abstract

The invention provides a method for preparing a cobaltous selenide nanometer sheet which is a catalyst capable of efficiently decomposing hydrazine compounds. The method belongs to the field of nanometer material synthesis and application. The method comprises the following steps: respectively weighting a certain amount of cobalt source predecessor and selenium source predecessor, taking a solvent and a reducing agent in defined volumes, and putting the weighted and taken materials into a high-pressure reactor; stirring the materials for 20 minutes by using a stirrer; after fully dissolving the materials, sealing the reactor and placing the reactor in an oven at 140 DEG C; after reacting for 24 hours, taking out the reactor and naturally cooling; and using ethanol and distilled water to respectively wash a reaction product for three times, thereby acquiring a sample. According to the method, an organic mould plate and a surface active agent are unnecessary, the cobaltous selenide nanometer sheet is synthesized in one step, the yield is high and the thickness of the cobaltous selenide nanometer sheet is small. The method has simple and energy-saving preparation process and is fit for industrial production. The acquired cobaltous selenide nanometer sheet has the advantages of small thickness, big specific surface area and excellent function for catalyzing and degrading hydrazine compounds, such as hydrazine hydrate, hydrazine chloride, hydrazine sulfate, and the like.

Description

Technical field: [0001] The invention belongs to the field of synthesis and application of nanometer materials, and in particular relates to the preparation of a selenium-based nanostructure material by hydrothermal and other synthesis methods, and the material has efficient catalytic decomposition effect on hydrazine hydrate and other hydrazine compounds. Background technique: [0002] Hydrazine, also known as hydrazine (molecular formula: N 2 h 4 , or H 2 N-NH 2 ), also generally refers to the hydrogen substituted derivatives in hydrazine, which is an important chemical raw material. They are raw materials for the production of pesticides, medicines, intermediates, dyes, imaging agents, and antioxidants. They are used in the manufacture of high-purity metals, synthetic fibers, and the separation of rare elements. In addition, they are also raw materials for the production of rocket fuel and explosives. In recent years, The use of hydrazine is still expanding. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/10C01G51/00C02F1/30C02F101/38
CPCY02P20/10Y02W10/37
Inventor 宋吉明刘程成赵京凤张胜义牛和林毛昌杰沈玉华
Owner ANHUI UNIVERSITY
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