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Magnesium aluminum pentafluoride/porous carbon composite material and its preparation method and application

A composite material, magnesium aluminum pentafluoride technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problem of limited adsorption capacity, achieve low price, low preparation cost, simple and fast preparation process Effect

Active Publication Date: 2020-04-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent CN201710367917.9 discloses a preparation method and application of modified activated carbon derived from peanut shells. Using peanut shells as raw materials, activated carbon materials are prepared by chemical activation, and modified with concentrated nitric acid at high temperature to obtain a source of activated carbon. Modified activated carbon based on peanut shells, but in the example, the saturated adsorption capacity of Congo red at 45°C is 421mg / g, and the adsorption capacity is limited
The adsorption capacity of the composite adsorbent is about 400mg / g, and the adsorption capacity is limited

Method used

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  • Magnesium aluminum pentafluoride/porous carbon composite material and its preparation method and application
  • Magnesium aluminum pentafluoride/porous carbon composite material and its preparation method and application
  • Magnesium aluminum pentafluoride/porous carbon composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step a: Modification of raw ore attapulgite: 1) Purification: first, sieve the raw ore attapulgite with a 150-mesh sieve to obtain attapulgite raw ore powder (Pal powder) for later use; weigh 5.0g of the sieved Pal powder+ 2.0g NH 4 Cl+1.0g NaCl in a 500mL beaker, then add 232.0mL deionized water+11.0mL concentrated HNO 3 +7.0mL concentrated H 2 SO 4 Stir vigorously for 4 hours; after stirring, immerse for 0.5 hours, pour out the upper liquid, and only filter the lower part, wash with absolute ethanol and deionized water until neutral, and finally dry at 80°C; 2) Surface activation and production Hole: acidify the above dried sample with 250.0mL of HCl solution with a concentration of 5mol / L for 2 hours, filter with suction after acidification, wash with absolute ethanol and deionized water until neutral, and finally place in an oven Dry at 80°C;

[0034] Step b: Preparation of glucose-modified attapulgite precursor: Weigh 3.0g modified attapulgite and 2.0g glucose ...

Embodiment 2

[0042] Step a: Same as Example 1.

[0043] Step b: Preparation of glucose-modified attapulgite precursor: namely, the surface of modified attapulgite adsorbs carbon source, weigh 3.0g of modified attapulgite and 0.75g of glucose into a 500mL beaker, add 40.0mL of deionized water and continue Stir for 24 hours, and then place in a water bath at 80° C. until the water evaporates to prepare a precursor.

[0044] Step c: Put the precursor in a tube furnace with a helium gas flow rate of 40mL / min, a heating rate of 10°C / min, and roast at 700°C for 4h to obtain Pal@C.

[0045] Step d: Add 10 ml of 40% HF to the Pal@C obtained in step c, wherein the mass ratio of Pal@C to hydrogen fluoride is 1:11.2, then heat and stir at 90°C for 6 hours, and then filter with suction and use Ion water and absolute ethanol were washed several times until neutral, and then dried in an oven at 90° C. for 10 h to obtain magnesium aluminum pentafluoride / porous carbon composite adsorbent. The mass ratio...

Embodiment 3

[0049] Step a: Same as Example 1.

[0050] Step b: Preparation of glucose-modified attapulgite precursor: namely, the surface of modified attapulgite adsorbs carbon source, weigh 3.0g of modified attapulgite and 0.75g of glucose into a 500mL beaker, add 40.0mL of deionized water and continue Stir for 24 hours, and then place in a water bath at 80° C. until the water evaporates to prepare a precursor.

[0051] Step c: Put the precursor in a tube furnace with a helium gas flow rate of 40mL / min, a heating rate of 10°C / min, and roast at 700°C for 4h to obtain Pal@C.

[0052] Step d: Add 20 ml of 40% HF to the Pal@C obtained in step c, wherein the mass ratio of Pal@C to hydrogen fluoride is 1:22.4, then heat and stir at 90°C for 6 hours, then perform suction filtration and use Ion water and absolute ethanol were washed several times until neutral, and then dried in an oven at 90° C. for 10 h to obtain magnesium aluminum pentafluoride / porous carbon composite adsorbent. The mass ra...

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Abstract

The invention provides a magnesium aluminum pentafluoride / porous carbon composite material and a preparation method and application thereof. The composite material takes a carbon nano tube as a carrier, and the pores of the carbon nano tube are filled with magnesium aluminum pentafluoride nano particles, and the surface of the carbon nano tube is coated with a magnesium aluminum pentafluoride nanoparticle layer. The method comprises the following steps: firstly, acidizing attapulgite to obtain modified attapulgite; then carrying out carbon source adsorption and roasting on the modified attapulgite to obtain carbon-coated attapulgite; adding hydrofluoric acid into the carbon-coated attapulgite obtained in step 2), heating and stirring, performing suction filtration, washing and drying to obtain the magnesium aluminum pentafluoride / porous carbon composite material; wherein the mass ratio of the carbon-coated attapulgite to the hydrogen fluoride is 1: (8.96-33.6). The composite materialis applied to the adsorption of anionic dye wastewater, and the maximum equilibrium adsorption capacity for Congo red dye is 3800-4261 mg / g.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a magnesium aluminum pentafluoride / porous carbon composite material and its preparation method and application. Background technique [0002] With the process of social industrialization and urbanization, the problem of environmental pollution has become increasingly prominent and has attracted the attention of people all over the world. Among them, the most prominent problem is organic dye wastewater, which mainly comes from printing and dyeing, papermaking, leather and textile industries. For example, Congo Red (CR) is an azoanionic dye, which has important applications in bioengineering and genetic markers, but it is prone to cancer risk. Especially the Congo red molecule contained in the water body has great harm to human health, animals and plants. Therefore, it is very meaningful and urgent to remove dyes in wastewater. [0003] At present, the treatment meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/0248B01J20/0288B01J20/046B01J20/205B01J20/28026B01J20/3078B01J20/3085C02F1/288C02F2101/308
Inventor 唐爱东钟来富
Owner CENT SOUTH UNIV
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