Preparation method and application of calcium hydroxide-loaded graphene aerogel composite material

A graphene aerogel, calcium hydroxide technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, separation methods, etc., can solve problems such as limited absorption, complex production process, etc., and achieve synthesis costs. Low, excellent air permeability, the effect of large adsorption capacity

Active Publication Date: 2020-12-18
SHANXI DATONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problems of limited absorption capacity and complex production process of the existing industrial harmful gas treatment and absorption methods, and provides a graphene airgel loaded with calcium hydroxide Preparation method of composite material and its application

Method used

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  • Preparation method and application of calcium hydroxide-loaded graphene aerogel composite material
  • Preparation method and application of calcium hydroxide-loaded graphene aerogel composite material
  • Preparation method and application of calcium hydroxide-loaded graphene aerogel composite material

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Embodiment 1

[0037] Graphite paper is used as electrolytic anode, graphite or nickel-based corrosion-resistant alloy is used as cathode, 98% concentrated sulfuric acid is used as electrolyte, graphite paper is immersed in concentrated sulfuric acid, and a voltage of +1.5V is applied for electrolytic intercalation reaction to obtain thickness increase 8x intercalated graphite paper. Using intercalated graphite paper as the anode, using dilute sulfuric acid or dilute nitric acid as the electrolyte, applying a voltage of +9V, slowly immersing the intercalated graphite paper in the electrolyte for electrolytic oxidation reaction, to obtain pure graphene oxide free of heavy metal ions. For the preparation of calcium hydroxide, weigh 10.8 g of sodium hydroxide and dissolve it in 2 L of deionized water, and weigh 17.98 g of anhydrous calcium chloride and dissolve it in 100 mL of ionized water. Stir the sodium hydroxide solution at room temperature at high speed, then add the calcium chloride solu...

Embodiment 2

[0039] Graphite paper is used as electrolytic anode, graphite or nickel-based corrosion-resistant alloy is used as cathode, 98% concentrated sulfuric acid is used as electrolyte, graphite paper is immersed in concentrated sulfuric acid, and a voltage of +1.5 V is applied for electrolytic intercalation reaction. Graphite or nickel The base corrosion-resistant alloy was used as the cathode, and the intercalated graphite paper whose thickness was increased by 8 times was obtained. Use intercalated graphite paper as the anode, use dilute sulfuric acid or dilute nitric acid as the electrolyte, apply a voltage of +9 V, slowly immerse the intercalated graphite paper in the electrolyte for electrolytic oxidation reaction, and wash it with deionized water for many times to obtain oxidation Graphene. For the preparation of calcium hydroxide, weigh 10.8 g of sodium hydroxide and dissolve it in 2 L of deionized water, and weigh 17.98 g of anhydrous calcium chloride and dissolve it in 100 ...

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Abstract

The invention relates to a preparation method and application of a calcium hydroxide-loaded graphene aerogel composite material, belongs to the technical field of graphene aerogel, and can solve the problems of limited absorption amount and complex production process of an existing industrial harmful gas treatment and absorption method, and the preparation method adopts a step-by-step synthesis method and comprises the following steps: firstly, synthesizing calcium hydroxide particles by utilizing a precipitation method; and synthesizing graphene oxide by using an electrolytic oxidation method. In the next step, calcium hydroxide and graphene oxide are subjected to a polymerization reaction through a hydrothermal synthesis method, and finally the graphene aerogel composite material loadedwith calcium hydroxide is obtained. The composite material can be used in the field of chemical adsorption removal of acidic industrial harmful gases such as SO2, H2S, Cl2 and the like, and can also be used in the field of adsorption of VOCs gases such as benzene and the like.

Description

technical field [0001] The invention belongs to the technical field of graphene airgel, and in particular relates to a preparation method and application of a graphene airgel composite material loaded with calcium hydroxide. Background technique [0002] SO 2 、H 2 S, Cl 2 Acidic gases such as acid gases are common industrial harmful gases. When there is a certain concentration of the above-mentioned gases in the air, they will strongly stimulate and corrode human respiratory organs, resulting in poisoning and even fatal hazards. How to protect and quickly eliminate these harmful gases in the air is an important issue in the field of environmental chemistry, and it is also an important condition for enterprises to ensure safe production. Common acid gas absorption methods are physical adsorption and chemical adsorption, that is, the microporous structure of activated carbon is used to adsorb and capture gas molecules, and activated carbon and other materials can also be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02
CPCB01J20/041B01J20/205B01J20/22B01J20/28047B01D53/02B01D2257/302B01D2257/304B01D2257/406B01D2257/7027B01D2257/708Y02A50/20
Inventor 秦君李小梅冯锋翟红卢珍刘志雄辛智慧
Owner SHANXI DATONG UNIV
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