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Synthetic method and adsorption property of graphene oxide-lanthanum hydroxide composite material

A composite material, lanthanum hydroxide technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of low adsorption effect, reduction of adsorption sites, reduction of specific surface area, etc., to achieve improved The effect of physical and chemical properties, simple process and stable performance

Active Publication Date: 2019-03-29
MINNAN NORMAL UNIV
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Problems solved by technology

[0014] (1) In the existing technology, the pure graphene oxide after adsorption will be dissolved in water, it is difficult to extract it from the solvent, and it cannot be reused, resulting in great waste, so it is necessary to synthesize recyclable composite materials
[0015] (2) The metal compounds supported by graphene oxide composite materials in the prior art are mainly ZnO, MnO 2 , CeO 2 、TiO 2 , Fe 3 o 4 etc., the adsorption effect is not ideal, it is mainly used as a catalyst, and no loaded La(OH) is seen 3 report
This will lead to the agglomeration of rare earth compounds, the reduction of specific surface area, the reduction of adsorption sites, and the adsorption effect is far lower than the synergistic effect of rare earth hydroxides uniformly loaded on graphene oxide.
[0016] (3) It is difficult to prepare graphene oxide-rare earth lanthanum oxide composite materials with better adsorption performance in the prior art
Although rare earth lanthanum hydroxide is easy to prepare, its stability needs to be further improved

Method used

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preparation example Construction

[0080] Such as figure 1 , the synthesis method of the graphite oxide-lanthanum hydroxide composite material provided by the embodiment of the present invention comprises:

[0081] Step 1, 0.2g of GO was dissolved in a three-necked flask with 200mL of deionized water and sonicated by an ultrasonic cleaner for 0.5h, after adding 0.8g of LaCl 3 The reaction was stirred at 60° C. for 0.5 h; a mixed solution 1 was obtained;

[0082] Step 2: Add 15ml of 2mol / L urea solution into the mixture, stir and heat to 90°C and keep it for more than 2h, then cool to room temperature, add 10ml of 1M 1NaOH solution and stir for 1h.

[0083]Step 3: Transfer part of the mixed solution of the synthesized material and 1M urea aqueous solution plus ethanol into a 100ml hydrothermal reactor with a filling rate of 80%, and react at 100°C for 48 hours. After the reaction, cool the reactor to room temperature and take it out. The product was filtered and washed several times with ethanol and deionized ...

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Abstract

The invention belongs to the technical field of water treatment agents, and discloses a graphene oxide-lanthanum hydroxide composite material and a synthetic method. The graphene oxide-lanthanum hydroxide composite material (La(OH)3 / GO) prepared by a direct precipitation method and a water / solvothermal synthesis method is used for adsorbing and removing Congo red (CR) and phosphate ions (PO4<3->)in a solution, a structure of the La(OH)3 / GO composite material is characterized by SEM, XRD, FT-IR and the like, the adsorption effects of the Congo red (CR) and the phosphate ions (PO4<3->) are discussed under different conditions such as pH, temperature and initial mass concentration, and the optimal adsorption conditions are determined. The adsorption effect is remarkable, and far exceeds theadsorption effect of adsorption materials reported in a lot of literatures.

Description

technical field [0001] The invention belongs to the technical field of water treatment agents, and in particular relates to a synthesis method and application of a graphene oxide-lanthanum hydroxide composite material. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] There are many wastewater treatment technologies, such as: flocculation, membrane filtration, solvent extraction, biosorption, chemical precipitation, ion exchange, reverse osmosis, electrocoagulation, sintering, electrolytic precipitation, coagulation and adsorption, etc. Among them, the adsorption method has become a widely used method for removing pollutants due to its advantages of cheap production and simple operation and treatment process. It is very important to design new adsorbents with excellent adsorption capacity. [0004] There are many kinds of adsorbents, which can be mainly divided into three categories: [0005] The firs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30C02F101/10
CPCB01J20/06B01J20/20C02F1/288C02F2101/308C02F2101/105
Inventor 闫海刚冯艳王庆华何亚三
Owner MINNAN NORMAL UNIV
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