Preparation and use methods of magnesium hydrate/reduced graphene oxide composite material

A magnesium hydroxide and composite material technology, applied in the field of materials, can solve the problems of toxicity, non-degradation, carcinogenicity, etc., and achieve the effects of reducing separation time, increasing adsorption effect, and rapid adsorption and degradation

Active Publication Date: 2018-07-20
FUJIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these dye sewage are toxic and difficult to degrade, or degrade to produce carcinogenic and toxic substances

Method used

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  • Preparation and use methods of magnesium hydrate/reduced graphene oxide composite material
  • Preparation and use methods of magnesium hydrate/reduced graphene oxide composite material
  • Preparation and use methods of magnesium hydrate/reduced graphene oxide composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1

[0027] Preparation of High Efficiency Photocatalyst Magnesium Hydroxide / Reduced Graphene Oxide Composite

[0028] Step 1), prepare graphene oxide suspension: take 1-3 parts by mass of natural graphite, 50ml-150ml mass fraction of concentrated sulfuric acid with a mass fraction of 98%, and potassium permanganate of 7-21 parts by mass are added to the reactor in batches, Keep the reaction temperature at 0°C, stir vigorously for 2 hours, then raise the temperature to 50°C, and react for 10-12 hours; after cooling the reactant to room temperature, pour it into 30% mass fraction of H 2 o 2 In aqueous solution, the H 2 o 2 The aqueous solution is cooled with ice water; the reaction product is washed with 30% dilute hydrochloric acid, and then washed with ethanol and deionized water respectively, and the reaction product is centrifuged several times to obtain graphene oxide; directly disperse graphene oxide in water to obtain graphene oxide suspension Liquid, t...

Embodiment 2

[0031] Photodegradation of Methylene Blue by Magnesium Hydroxide / Reduced Graphene Oxide Composite

[0032] First, configure 2.0*10 -5 For the methylene blue aqueous solution of M, take 20mg of composite material and add 50mL of methylene blue solution, and stir magnetically for 30min in a dark environment to completely absorb. After irradiating with 365nm ultraviolet light for 5min, the methylene blue was completely degraded and the solution became colorless. And after UV-Vis absorption spectrum test, the results show that the methylene blue is completely degraded. Secondly, in order to test the recyclability of the composite material, the black solid obtained after centrifugation of the suspension was soaked in 10 mL of absolute ethanol with magnetic stirring for 2 h, washed by centrifugation and dried, and the above photocatalytic steps were repeated. The results show (such as image 3 ), the second cycle process can still be completely degraded within 5min, and the third...

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Abstract

The invention provides a preparation method of a magnesium hydrate / reduced graphene oxide composite material with efficient photocatalytic performance. Another aim of the invention is to provide efficient application of the material in photodegradation of organic pollutants in dyeing wastewater. The composite material is extremely strong in photocatalytic degradation effect and is still relativelyhigh in photocatalytic degradation capacity under a plurality of circulations. Furthermore, as magnesium hydrate has a relatively large density, the composite material is easy to be separated from sewage, thereby providing convenience for recycling of a catalyst.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for preparing and using a magnesium hydroxide / reduced graphene oxide composite material. Background technique [0002] Dyes are widely used in textiles, papermaking, cosmetics, leather, fabric treatment and other fields, and a large amount of dye sewage is produced every year. Most of these dye sewage are toxic and difficult to degrade, or degrade to produce carcinogenic and toxic substances. At present, the treatment methods of dye wastewater mainly include: (1) chemical treatment technology; (2) physical treatment technology; (3) biological treatment technology; (4) photocatalytic technology. Among them, photocatalytic technology is an environmentally friendly pollution control technology, which has a wide range of applications in the fields of waste water and gas purification, antibacterial and environmental protection. A large number of scientific and technologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/10B01J35/02C02F1/32C02F101/30
CPCB01J21/10B01J35/004B01J35/02C02F1/32C02F2101/308
Inventor 方辉吴方娟郑思源徐昱樨梁嘉豪
Owner FUJIAN UNIV OF TECH
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