Novel graphene-molecular sieve composite gas purifying material and preparation method thereof

A technology for compounding gases and purifying materials, applied in separation methods, chemical instruments and methods, and other chemical processes, etc., can solve the problems of limited adsorption capacity, affecting human health, and interfering with gas purification processes.

Inactive Publication Date: 2017-05-24
GUANGZHOU FENGSHANG ELECTRIC APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are following problems—the above-mentioned methods all involve a large amount of chemical reagents. If the excess reagents are not completely removed, it may not only interfere with the gas purification process, but also easily cause secondary pollution during the gas purification process, and even affect human health
In addition, the most common adsorbents in the field of adsorption

Method used

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preparation example Construction

[0023] A kind of preparation method of novel graphene-molecular sieve composite gas purification material provided by the invention comprises the following steps:

[0024] 1) Activation of 3A molecular sieve: 3A molecular sieve is soaked in dilute hydrochloric acid and dilute sodium hydroxide solution with a concentration of 1 to 1.5 mol / L and dilute sodium hydroxide solution for 12 to 24 hours respectively under mechanical stirring, and then washed repeatedly with distilled water until neutral, that is, activated 3A molecular sieve;

[0025] 2) Activating graphene oxide and obtaining a graphene suspension with a concentration of 0.1 to 10 g / L by ultrasonic dispersion: first, mix the few-layer graphene oxide powder and NaOH at a mass ratio of 10:1 to 2:1, and After drying in a drying oven, put it in a tube furnace, under He atmosphere, raise the temperature to 550-750°C at a rate of 5-10°C / min, keep it for 1-2h, then wash with distilled water until neutral; finally ultrasonic ...

Embodiment 1

[0031] The preparation method of a novel graphene-3A molecular sieve composite gas purification material provided in this embodiment comprises the following steps:

[0032] 1) Activation of 3A molecular sieve: soak 3A molecular sieve in dilute hydrochloric acid and dilute sodium hydroxide solution with a concentration of 1.5mol / L for 12 hours under mechanical stirring, and then repeatedly rinse with distilled water until neutral to obtain activated 3A molecular sieve;

[0033] 2) Activate graphene oxide and obtain a graphene suspension with a concentration of 0.1g / L by ultrasonic dispersion: first, mix the few-layer graphene oxide powder with NaOH at a mass ratio of 10:1, and dry it in a blast drying oven , placed in a tube furnace, in a He atmosphere, heated up to 550°C at a rate of 10°C / min and kept for 2h, then washed with distilled water until neutral; finally ultrasonically treated for 18h to disperse evenly, to obtain a concentration of 0.1 g / L graphene suspension.

[0...

Embodiment 2

[0036]The preparation method of a novel graphene-3A molecular sieve composite gas purification material provided in this embodiment comprises the following steps:

[0037] 1) Activation of 3A molecular sieve: soak 3A molecular sieve in dilute hydrochloric acid and dilute sodium hydroxide solutions with a concentration of 1mol / L for 24 hours under mechanical stirring, and then rinse repeatedly with distilled water to neutrality to obtain activated 3A molecular sieve;

[0038] 2) Activating graphene oxide, and obtaining a concentration of 5g / L graphene suspension by ultrasonic dispersion: first, the few-layer graphene oxide powder is mixed with NaOH in a mass ratio of 5:1, and after drying in a blast drying oven, Put it in a tube furnace, under He atmosphere, raise the temperature to 600°C at a heating rate of 5°C / min, keep it for 1h, then wash it with distilled water until it is neutral; finally ultrasonically treat it for 24h to disperse it evenly, and obtain a concentration of...

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Abstract

A preparation method of a novel graphene-molecular sieve composite gas purifying material comprises the following steps: 1) activating a 3A molecular sieve; 2) activating a graphene oxide, and obtaining a graphene suspension through ultrasonic dispersion; 3) adding the activated 3A molecular sieve and the graphene suspension into a hydrothermal reaction kettle according to a mass ratio ranging from (1:5) to (1:20), performing a hydrothermal reaction for 8-12h at 180-220 DEG C, filtering and drying a reaction product, and vacuumizing in a vacuum drying box to obtain the graphene-molecular sieve composite gas purifying material. The graphene-molecular sieve composite gas purifying material prepared according to the preparation method solves the problems in aspects of the specific surface area and the selectivity of the conventional adsorbent material, and has permanent porosity and pore diversity. The invention further provides the novel graphene-molecular sieve composite gas purifying material prepared according to the preparation method.

Description

technical field [0001] The invention relates to the field of compound molecular sieve preparation, in particular to a novel graphene-molecular sieve composite gas purification material and a preparation method thereof. Background technique [0002] Zeolite (zeolite) molecular sieve is a very important microporous material. Its spatial network structure is composed of silicon-oxygen tetrahedral units and aluminum-oxygen tetrahedral units. As a crystalline aluminosilicate, it has abundant pores. and uniform pore size distribution. Due to its large number of voids and large specific surface area, it is widely used in gas filtration and adsorption. [0003] Graphene is a new type of material with a two-dimensional sheet-like single-layer structure composed of carbon atoms, in which the carbon atoms are represented by sp 2 The hybrid orbitals form a hexagonal honeycomb structure. Graphene material has strong mechanical toughness, good acid and alkali resistance, high flexibili...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/20B01D53/02B01D2253/102B01D2253/106B01J20/16
Inventor 尹宗杰黎佩珊张文娟楚双印
Owner GUANGZHOU FENGSHANG ELECTRIC APPLIANCE
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