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Preparation method of bacterial cellulose/graphene oxide nano-composite sphere adsorption material

A bacterial cellulose and nanocomposite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, radioactive purification, etc., can solve the problems of high production and operation costs of adsorption materials, secondary pollution, etc., and achieve environmental protection and Effects of ecological balance, less residue, and increased specific surface area

Inactive Publication Date: 2014-12-17
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Adopting the present invention can effectively solve the three major problems in the prior art, which are high production and operation cost of adsorption materials, easy to produce secondary pollution, and desorbed pollutants need to be treated again. It is used for heavy metal ions, radioactive nuclei It can also improve the adsorption capacity of uranyl ions and strontium ions

Method used

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  • Preparation method of bacterial cellulose/graphene oxide nano-composite sphere adsorption material
  • Preparation method of bacterial cellulose/graphene oxide nano-composite sphere adsorption material

Examples

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Embodiment 1

[0026] A preparation method of bacterial cellulose / graphene oxide nanocomposite ball adsorption material, the steps are:

[0027] First, according to glucose 6g / 100ml (that is, 100ml liquid medium contains 6g glucose, and so on), peptone 0.5g / 100ml, yeast extract 0.9g / 100ml, agar 3g / 100ml, citric acid 0.4g / 100ml, potassium dihydrogen phosphate 0.5g / 100ml. Take the raw materials of each component, dissolve and mix them uniformly to prepare a liquid medium, adjust the pH=5.8, and maintain sterilization under the conditions of a pressure of 103.4 kPa vapor pressure and a temperature of 120°C for 20 minutes; then take a 250 ml Erlenmeyer flask, Add 125 ml of liquid medium each. Sterilize the instruments and items used, add 1 ml of graphene oxide aqueous solution (1 mg / ml, that is, 1 ml of graphene oxide aqueous solution contains 1 mg of graphene oxide) to the liquid medium, inoculate Acetobacter xylinum for cultivation, Shaking culture at 35 degrees Celsius and 80 rpm, Acetobac...

Embodiment 2

[0032] A preparation method of bacterial cellulose / graphene oxide nanocomposite ball adsorption material, the steps are:

[0033]First, according to glucose 6 g / 100 ml, peptone 0.6 g / 100 ml, yeast extract 0.8 g / 100 ml, agar 3 g / 100 ml, citric acid 0.4 g / 100 ml, potassium dihydrogen phosphate 0.5 g / 100 ml. Take the raw materials of each component, dissolve and mix them evenly to prepare a liquid medium, adjust the pH=5.9 and maintain the sterilization for 20 minutes at a pressure of 103.4 kPa vapor pressure and a temperature of 120°C; then take a 250 ml Erlenmeyer flask and add 125 ml of liquid culture medium. Sterilize the instruments and items used, add 2 ml of graphene oxide aqueous solution (1 mg / ml, that is, 1 ml of graphene oxide aqueous solution contains 1 mg of graphene oxide) to the liquid medium, inoculate Acetobacter xylinum for cultivation, At 32 degrees Celsius, 100 rpm shaking culture, Acetobacter xylinum secretes cellulose and attaches the single-layer graphene ...

Embodiment 3

[0037] A preparation method of bacterial cellulose / graphene oxide nanocomposite ball adsorption material, the steps are:

[0038] First press glucose 5.5 g / 100 ml, peptone 0.55 g / 100 ml, yeast extract 0.7 g / 100 ml, agar 2.5 g / 100 ml, citric acid 0.3 g / 100 ml, potassium dihydrogen phosphate 0.3 g / 100 ml. Take the raw materials of each component, dissolve and mix them evenly to prepare a liquid culture medium, adjust the pH=6.0, and maintain the sterilization for 20 minutes under the conditions of a vapor pressure of 103.4 kPa and a temperature of 120°C; after that, take a 250 ml Erlenmeyer flask and add 125 ml of liquid culture medium. Sterilize the instruments used, add 3 ml of graphene oxide aqueous solution (1 mg / ml, that is, 1 mg of graphene oxide in 1 ml of graphene oxide aqueous solution) to the liquid medium, inoculate Acetobacter xylinum for cultivation, At 30 degrees Celsius and 150 rpm shaking culture, Acetobacter xylinum secretes cellulose and attaches the single-la...

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Abstract

The invention discloses a preparation method of a bacterial cellulose / graphene oxide nano-composite sphere adsorption material. The preparation method comprises the following steps: preparing a liquid culture medium; adding a graphene oxide aqueous solution, uniformly mixing, then inoculating with strain, namely acetobacter xylinum, carrying out rotating and shaking culture at the temperature of 4-35 DEG C, secreting cellulose by acetobacter xylinum to attach graphene oxide dispersed in the liquid culture medium to the surface, winding and wrapping the cellulose to form a spherical three-dimensional network bacterial cellulose / graphene oxide nano-composite sphere nanocomposite material; and boiling the formed nano-composite material by using a potassium hydroxide aqueous solution, filtering, washing by using deionized water, then freeze-drying to prepare the bacterial cellulose / graphene oxide nano-composite sphere adsorption material. The adsorption material prepared by the method is large in specific surface area, environmentally friendly and low in cost and has the good function of adsorbing radionuclides such as uranyl ions and strontium ions, as well as heavy metal ions in industrial wastewater.

Description

technical field [0001] The invention belongs to the preparation of composite materials for adsorption, and relates to a preparation method of bacterial cellulose / graphene oxide nanocomposite ball adsorption materials. The bacterial cellulose / graphene oxide nanocomposite ball adsorption material prepared by the invention is mainly used for adsorbing heavy metal ions, radionuclides and the like in industrial wastewater. Background technique [0002] Graphene oxide is an important derivative of graphene, also known as functionalized graphene. Its structure is roughly the same as that of graphene, except that there are some functional groups connected to the two-dimensional base surface. Graphene oxide not only contains hydroxyl, Various functional groups such as epoxy group, carbonyl group and carboxyl group can also be intercalated or stripped by small molecules or polymers, which can effectively improve the performance of composite materials. [0003] Bacterial cellulose is ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F101/20G21F9/12B01J20/30B01J20/24
Inventor 竹文坤段涛王正上何毅李威
Owner SOUTHWEAT UNIV OF SCI & TECH
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