Aluminum oxide adsorbent as well as preparation method and application thereof

A technology of aluminum oxides and adsorbents, applied in the fields of alumina/hydroxide preparation, chemical instruments and methods, adsorption water/sewage treatment, etc. The structure is underdeveloped and other problems, to achieve the effect of enriching the pore structure, enriching the active sites, and shortening the reaction time

Active Publication Date: 2015-04-22
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, researchers have prepared many aluminum oxides with different morphologies, but most of them exist in the form of crystals, which have the problems of few adsorption active sites, small specific surface area and undeveloped pore structure, thereby reducing the the removal efficiency of pollutants

Method used

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  • Aluminum oxide adsorbent as well as preparation method and application thereof
  • Aluminum oxide adsorbent as well as preparation method and application thereof
  • Aluminum oxide adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Dissolve 0.03mol of aluminum nitrate in 60mL of glacial acetic acid at room temperature to obtain mixed solution I; add 20mL of isopropanol to solution I at room temperature to obtain mixed solution II; place mixed solution II in an ultrasonic oscillator Ultrasonic reaction at 50 ° C for 1 h to obtain a transparent solution. Then place the solution in a 100mL hydrothermal reaction kettle and react for 4 hours at 200°C in a blast drying oven. After drying for 10 h, the obtained white powder is the precursor of the prepared adsorption material. Finally, the precursor was placed in a tube furnace, and the temperature was raised to 300° C. at 20° C. / min under an air atmosphere, and kept for 3 hours to obtain the adsorption material used.

[0061] The SEM of the adsorbent material prepared by this embodiment is as follows figure 1 shown. As can be seen from the figure, the prepared material is monodisperse spherical, with a particle size between 10 μm and 50 μm. Its FTIR...

Embodiment 2

[0064] Dissolve 0.03 mol of aluminum isopropoxide in 80 mL of glacial acetic acid at room temperature to obtain a mixed solution; place the mixed solution in an ultrasonic oscillator at 50° C. for 1 h to obtain a transparent solution. Then place the solution in a 100mL hydrothermal reaction kettle and react for 2 hours at 200°C in a blast drying oven. After drying for 10 h, the obtained white powder is the precursor of the prepared adsorption material. Finally, the precursor was placed in a tube furnace, and the temperature was raised to 350° C. at 20° C. / min under an air atmosphere, and kept for 3 hours to obtain the adsorption material used.

[0065] The SEM and XRD figures of the adsorbent material prepared by this embodiment are as follows image 3 , 4 shown. It can be seen from the figure that the material is in the shape of amorphous microspheres and has a well-developed pore structure, which is conducive to the adsorption and diffusion of pollutants on the surface an...

Embodiment 3

[0068] The amorphous aluminum oxide that embodiment 1,2 prepares is applied to the F that concentration is 5,10,30,50,75,100,150mg / L in removing water - , Substituting the adsorption amount values ​​obtained at different concentrations into the following Langmuir isotherm adsorption equation and fitting:

[0069] q e = Q max b C e 1 + b C e

[0070] Among them, C e (mg / L) is F in the solution - The equilibrium concentration of q e (mg / g) is the adsorption amount at equilibrium, Q max (mg / g) is the maximum adsorption capacity per gram of adsorbent, b (L / mg) is the Langmuir constant; the fitting results are as follows Figure 6 and Figure 7 shown. It can be seen from the figure t...

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Abstract

The invention relates to an aluminum oxide adsorbent as well as a preparation method and an application thereof. An aluminum oxide exists in an amorphous mode, has more crystal defects and provides abundant active sites, a BET method is adopted to measure that the specific area of the aluminum oxide is larger than 300 m<2>/g, and a DFT method is adopted to measure that the average pore size of the aluminum oxide is between 1.1 nanometers and 1.8 nanometers. A material prepared through the method disclosed by the invention is an amorphous aluminum oxide, has abundant active sites and is favorable to the adsorption and removal of a pollutant; in addition, the preparation method disclosed by the invention is novel, simple in process and familiar in equipment and can be used for large-scale preparation.

Description

technical field [0001] The invention relates to an amorphous aluminum oxide adsorbent and its preparation method and application, belonging to the technical field of inorganic nanometer materials. Background technique [0002] With the continuous development of human society, the problem of environmental pollution has become increasingly prominent. Among them, toxic and harmful micro-pollutants in water environment resources have constituted a serious threat to human life and health. Micro-pollutants such as chromium, cadmium, lead, fluorine, and arsenic in water environment resources can enter the human body through drinking water and accumulate in the body, causing special endemic diseases, such as "bone pain disease", "endemic fluorosis" and "earth arsenic disease". Therefore, the safety of water resources has also become a major livelihood issue that has attracted people's attention. At present, commonly used water treatment methods mainly include chemical precipitatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30C01F7/02C02F1/28
CPCB01J20/08B01J20/28019B01J20/28061B01J20/2808C01F7/30C01P2002/70C01P2004/03C01P2004/32C01P2004/61C01P2006/12C01P2006/16
Inventor 于晓琳康东娟葛茂发
Owner INST OF CHEM CHINESE ACAD OF SCI
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