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Nanometer adsorption material and preparation method thereof

A nano-adsorbent material and composite material technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem that the adsorption material is not easy to recycle and reuse, the price of ion exchange resin is high, and the selectivity of activated carbon is poor, etc. problem, to achieve fast adsorption rate, avoid secondary pollution, good regeneration effect

Inactive Publication Date: 2013-06-05
UNIV OF SCI & TECH OF CHINA
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  • Description
  • Claims
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Problems solved by technology

However, the selectivity of activated carbon is poor and the regeneration cost is high; while the price of ion exchange resin is relatively high
Moreover, ordinary adsorbent materials are not easy to recycle and reuse, which is likely to cause secondary pollution

Method used

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  • Nanometer adsorption material and preparation method thereof
  • Nanometer adsorption material and preparation method thereof
  • Nanometer adsorption material and preparation method thereof

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preparation example Construction

[0025] The present invention also provides the preparation method of this nano adsorption material, comprises the following steps:

[0026] a) One-step synthesis of Fe3O4 / graphene composites by solution method: in N 2 FeCl 3 and FeCl 2 Add it into the graphene oxide solution, adjust the pH to 9-11, preferably adjust it with ammonia water at a temperature of 60°C to 80°C, then add a hydrazine hydrate solution for reduction, preferably react at a temperature of 80°C to 100°C.

[0027] where FeCl 3 with FeCl 2 The molar ratio of is preferably 1.5-3:1.

[0028] The concentration of graphene oxide solution is selected from 0.5 mg / mL to 1.5 mg / mL. Graphene oxide can be synthesized by common Hummers chemical method, see Hummers, W.S, et al.J.Am.Chem.Soc., 1958, 80: 1339, or purchase existing graphene oxide products on the market. The addition of graphene oxide can greatly improve the overall adsorption performance of the adsorption material and enhance the stability and mechani...

Embodiment 1

[0034] a) at N 2 FeCl with a molar ratio of 2:1 was 3 and FeCl 2 Add it to the graphene oxide solution with a concentration of 1mg / mL, adjust the pH to 10 with ammonia water at 80°C, and then add a hydrazine hydrate solution with a mass percent concentration of 30% at 90°C for reaction reduction, and add the hydrazine hydrate solution The amount is 20 mL / (g graphene oxide).

[0035] b) Combine the above-prepared ferric oxide / graphene composite suspension with magnesium chloride hexahydrate at a concentration of 0.15mmol / mL, aluminum chloride hexahydrate at 0.06mmol / mL and hexamethylene chloride at a concentration of 0.3mmol / mL The aqueous solution of base tetramine was mixed, put into a hydrothermal kettle for hydrothermal reaction at 100° C., and reacted for 12 hours to obtain ferric oxide / graphene / magnesium aluminum double hydroxide composite material.

[0036] The molar ratio of each element in the reactant is Fe:Mg:Al:C=0.27:0.50:0.28:0.39. The microstructure of the pr...

Embodiment 2

[0038]a) at N 2 FeCl with a molar ratio of 1.5:1 was 3 and FeCl 2 Add it to a graphene oxide solution with a concentration of 0.8mg / mL, adjust the pH to 9 with ammonia water at 60°C, and then add a hydrazine hydrate solution with a mass percent concentration of 35% at 85°C for reaction reduction, the hydrazine hydrate solution The addition amount is 15mL / (g graphene oxide).

[0039] b) Combine the above-prepared ferric oxide / graphene composite suspension with magnesium chloride hexahydrate, 0.07 mmol / mL aluminum chloride hexahydrate and 0.25 mmol / mL hexamethylene chloride at a concentration of 0.1 mmol / mL The aqueous solution of base tetramine was mixed, put into a hydrothermal kettle for hydrothermal reaction at 110° C., and reacted for 10 hours to obtain ferric oxide / graphene / magnesium aluminum double hydroxide composite material.

[0040] The molar ratio of each element in the reactant is Fe:Mg:Al:C=0.2:0.40:0.3:0.5.

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Abstract

The invention provides a nanometer adsorption material which is a composite material of ferroferric oxide, graphene and magnalium double hydroxides. The molar ratio of Fe to Mg to AL to C is (0.18-0.27):(0.33-0.82):(0.17-0.44):(0.17-0.83). The production process of the nanometer adsorption material is simple, and has advantages of being large in adsorption capacity, quick in adsorption rate, good in reproductibility, capable of achieving magnetic separation and long in service life and the like. An adsorption removal rate for common low-concentration acid dye waste water can reach more than 99%, and a deep treatment effect is achieved. Addition of the little graphene greatly improves an adsorptive property of the whole adsorption material, intensifies stability and mechanical strength of the material, and avoids the occasion that the danger of secondary pollution of the nanometer material is caused by water body loss.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to a nanometer adsorption material and a preparation method thereof. Background technique [0002] As we all know, the water consumption of printing and dyeing wastewater is relatively large. It takes 100-200 tons of water to process 1 ton of textiles, of which 80%-90% becomes wastewater. The wastewater discharge of textile printing and dyeing industry accounts for the fifth place in the national industrial wastewater statistics, and the printing and dyeing wastewater accounts for about 80% of the wastewater of textile printing and dyeing industry. The annual printing and dyeing wastewater is about 11.3×10 8 t, daily discharge (300~400)×10 4 t. Acidic azo dyes are one of the main pollutants in printing and dyeing wastewater. Azo dye wastewater has the characteristics of large wastewater discharge, high chroma, complex composition, high COD concentration, and high toxicity. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F103/30
Inventor 徐安武吴西林
Owner UNIV OF SCI & TECH OF CHINA
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