Manganese diselenide manometer bar as well as synthetic method and application thereof

A nanorod, aspect ratio technology, applied in chemical instruments and methods, nanotechnology, boron compounds, etc., can solve the problems of high cost, complex operating conditions, immature structure control, etc., to achieve low cost, good absorption effect, The effect of excellent microwave performance

Inactive Publication Date: 2012-07-11
FUDAN UNIV
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  • Abstract
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Problems solved by technology

In recent years, the main method of synthesizing nano-manganese selenide is molecular beam epitaxy [12] , metalorganic vapor phase epitaxy [13] ,Hydrothermal [14-17] etc., the first two methods either synthesized particles that are not uniform and easy to aggregate, or the operating conditions are complicated, the toxicity is high and the cost is high. In comparison, the hydrotherma

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  • Manganese diselenide manometer bar as well as synthetic method and application thereof
  • Manganese diselenide manometer bar as well as synthetic method and application thereof
  • Manganese diselenide manometer bar as well as synthetic method and application thereof

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Embodiment Construction

[0025] MnSe 2 Nanorods were prepared by solvothermal method:

[0026] (1) First, dissolve 0.01-3.34 g of polyvinylpyrrolidone (PVP) in 20 mL of N,N-dimethylformamide (DMF) at room temperature, and then add 5 mL of 0.2 M Manganese acetate (Mn(CH 3 COO) 2 4H 2 O) DMF solution, fully stirred for 25-35 min, and then slowly added 5 mL of selenium dioxide (SeO2) with a concentration of 0.05 M 2 ) aqueous solution, the rate of addition is 8-10 seconds / drop, after the dropwise addition is completed, all the solution is poured into a hydrothermal kettle, heated to 180 °C, and reacted for 24 hours. The amount of PVP added is different, and the obtained MnSe 2 The nanorods have different aspect ratios.

[0027] (2) Purification and post-treatment of the product: After the hydrothermal kettle is cooled, the dark brown product is centrifuged, washed with 1 M citric acid to remove the white by-product manganese hydroxide, and then washed with deionized water and After washing several...

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Abstract

The invention belongs to the technical field of manometer function materials and particularly relates to a manganese diselenide manometer bar as well as a synthetic method and an application of the manganese diselenide manometer bar. The manganese diselenide manometer bars with different length-diameter ratios are obtained through regulating the addition quantity of surface active agents of polyvinyl pyrrolidone (PVP), and good microwave absorption performance is shown. The length-diameter ratio of the manganese diselenide manometer bar is 15 to 70, the minimum reflection loss is reduced along with the increase of the length-diameter ratio, and the minimum reflection loss can reach -12.72 dB. In addition, the preparation cost of the manometer material is low, the efficiency is high, the industrial amplification is easier for solving the practical application problem, the manometer material is used as a novel wave absorbing material to be widely applied to electromagnetic shielding andmicrowave absorption, and wide application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of nanometer functional materials, in particular to a manganese diselenide-based nanorod and its preparation method, and its application in microwave absorption and electromagnetic shielding. Background technique [0002] With the rapid development of electronic technology, the electromagnetic radiation in people's lives is increasing. At the same time, in order to meet the needs of modern warfare, stealth materials will be widely used in weapons. Research on materials with wave-absorbing capabilities has urgent practical value. The so-called absorbing material refers to the material that can absorb and convert most of the electromagnetic waves projected on its surface into other forms of energy, mainly heat energy and almost no reflection. [1] . Due to the destruction of periodic boundary conditions caused by quantum size effects and tunneling effects, nanomaterials have obvious changes in the acousto-opti...

Claims

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Application Information

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IPC IPC(8): C01B35/14B82Y40/00C09K3/00
Inventor 车仁超张捷
Owner FUDAN UNIV
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