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Graphene/double-metal oxide composite material and preparation method and application thereof

A technology of bimetallic oxides and composite materials, which is applied to chemical instruments and methods, water pollutants, and other chemical processes, can solve the problems of reducing surface area and unfavorable pollutant adsorption, and achieves simple preparation process, high cost performance, and easy The effect of control

Inactive Publication Date: 2013-09-25
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology

However, graphene is hydrophobic and usually suffers from irreversible agglomeration due to strong interactions between adjacent sheets, greatly reducing the surface area and thus detrimental to the adsorption of pollutants.

Method used

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  • Graphene/double-metal oxide composite material and preparation method and application thereof
  • Graphene/double-metal oxide composite material and preparation method and application thereof
  • Graphene/double-metal oxide composite material and preparation method and application thereof

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Embodiment Construction

[0020] With Al(NO 3 ) 3 9H 2 O, Mg(NO 3 )· 2 6H 2 The mixture of O and urea was mixed with the suspension obtained by ultrasonication of graphene oxide, and the mixture was added to a 100mL polytetrafluoroethylene reactor, and reacted at 120°C for 24 hours by hydrothermal method to prepare graphene / layered bismuth Metal hydroxide (transmission electron microscope photo of this material is shown as figure 2 shown), and then calcined at 500°C for 5h to make a graphene / layered double metal hydroxide composite (the transmission electron microscope photo of the composite is shown in image 3 shown). Such as figure 1 Shown: X-ray spectra of graphene / layered bimetallic hydroxide composite (b) and graphene / bimetallic oxide composite (c) compared to X-ray photoelectron spectroscopy of graphene oxide (a). Photoelectron spectroscopy, showing not only O1S peak (532.5eV) and C1S peak (284.8eV), but also Al2p peak (75eV) and Mg1S peak (1304eV), which indicates that graphene / layered...

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Abstract

The invention discloses a graphene / double-metal oxide composite material, heavy metal ion adsorption of the graphene / double-metal oxide composite material and a preparation method of the graphene / double-metal oxide composite material. The composite material is prepared from a divalent nitrate hydrate, a ferric nitrate hydrate, a basic compound and graphene oxide. According to the composite material disclosed by the invention, the main raw materials are low in cost, and the preparation method is simpler and is easier to control. The composite material has a strong Cr(VI) adsorption function and can be used repeatedly, so that the cost performance is high.

Description

technical field [0001] The invention belongs to the fields of chemical industry, new materials and environmental protection, and specifically relates to a graphene / double metal oxide composite material, its preparation method and its application in water body purification. Background technique [0002] Due to the haphazard treatment of industrial wastewater, heavy metal pollution has become a global environmental problem with adverse effects on the environment and human health. Among these heavy metals, hexavalent chromium (Cr(VI)) is a common harmful pollutant because of its high mobility and carcinogenicity. To meet the discharge level, many treatment technologies for Cr(VI)-containing wastewater have been developed, including membrane filtration, precipitation, ion exchange, and adsorption, etc. Among these methods, adsorption technique is widely used because of its simplicity, economy, and high efficiency. [0003] Layered double hydroxide (LDH) is a kind of anionic cl...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/22
Inventor 袁小亚王雨飞
Owner CHONGQING JIAOTONG UNIVERSITY
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