Preparation method of ZnSnO3@rGO composite material

A composite material, H2SO4 technology, applied in the field of preparation of ZnSnO3@rGO composite materials, can solve the problems of unfavorable electromagnetic waves and limit the application of graphene, and achieve the effect of excellent wave absorption ability

Active Publication Date: 2019-03-01
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

However, due to the influence of the skin effect, strong electronic conductivity and ultra-high dielectric constant will limit the application of graphene in the field of microwave absorption, which is not conducive to the entry of electromagnetic waves into the absorber.

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  • Preparation method of ZnSnO3@rGO composite material
  • Preparation method of ZnSnO3@rGO composite material
  • Preparation method of ZnSnO3@rGO composite material

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Embodiment Construction

[0034] The present invention will be further explained below in conjunction with specific embodiments.

[0035] Preparation of composite materials

[0036] Graphene oxide was prepared by adding concentrated H 2 SO 4 / H 3 PO 4 (360:40mL) solution, giving off a slight heat. The reaction mixture was then heated to 50°C and stirred magnetically for 12 hours. When the reaction cooled to room temperature, it was poured into 30% HO 2 o 2 (3 mL) of ice, the color of the mixture changed to yellow. Graphene oxide was obtained after filtration, washed with hydrochloric acid (concentrated hydrochloric acid and water volume ratio 1:10) to remove metal ions, and then vacuum freeze-dried for 24 hours. The rest of the chemical reagents were purchased from Sinopharm Chemical Reagent Co., Ltd.

[0037] ZnSnO 3 Synthesis of @rGO composite material: The prepared graphene oxide (40mg) was added to a beaker filled with 60mL deionized water, and ultrasonicated for 2 hours. Then add equimo...

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Abstract

The invention discloses a preparation method of a ZnSnO3@rGO composite material. The preparation method comprises the following steps: 1) adding a dried graphene sheet and potassium permanganate intoa strong H2SO4/H3PO4 mixed solution respectively, stirring at a constant temperature of 50 DEG C for 12 hours, cooling to room temperature, adding the reaction solution into ice containing 30 percentof H2O2, filtering after the color of the mixture changes to luminous yellow to obtain graphene oxide, washing with hydrochloric acid to remove metal ions, and performing vacuum freeze drying for 24 hours; 2) adding the prepared graphene oxide into a beaker filled with deionized water, performing ultrasonic treatment for 24 hours, adding SnCl4.5H2O and Zn(NO3)2.6H2O which are equal in molar mass respectively, performing magnetic stirring, adding 24 percent by weight of ammonia water into the reaction mixture dropwise, continuously stirring till the pH value is 9, heating the mixed solution ata temperature of 130 DEG C for 15 hours, washing with distilled water and ethanol respectively to obtain black powder particles several times, and drying the black powder particles to obtain a ZnSnO3@rGO composite material. The prepared composite material has the advantages of small thickness, good wave absorbing effect and wide absorbing wave band.

Description

technical field [0001] The present invention relates to the technical field of wave-absorbing materials, in particular to a method for preparing a ZnSnO3@rGO composite material with good wave-absorbing properties. Background technique [0002] The rapid development of electromagnetic technology has prompted more and more electronic radiation to exist in people's daily life. Electromagnetic interference not only causes harm to various electromagnetic equipment and communication equipment, but also brings harm to people's health. [0003] There are two main ways to eliminate or protect electromagnetic waves: electromagnetic shielding and wave-absorbing materials. Electromagnetic shielding materials mainly prevent electromagnetic waves from reaching the protected area, and cannot essentially eliminate electromagnetic waves. Absorbing material is a kind of energy conversion material that can convert electromagnetic energy into heat energy and so on. [0004] In the field of mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/198C01G19/00C09K3/00
CPCC09K3/00C01B32/184C01B32/198C01G19/00C01P2004/03C01P2004/04C01P2002/72C01P2004/62
Inventor 张元春高圣涛李毅谢雨婷朱群龙王淼周放
Owner ANHUI UNIV OF SCI & TECH
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