Magnetic biochar composite material preparation method based on microalgae

A composite material, bio-carbon technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of unfriendly processes, discontinuous magnetic bio-carbon materials, and long production cycles , to achieve the effect of large application value, easy magnetic separation and low cost

Inactive Publication Date: 2016-01-13
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method for preparing a magnetic bio-carbon composite material based on microalgae, which is used to solve the problems of discontinuity, Problems such as long production cycle and unenvironmental protection of the process

Method used

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  • Magnetic biochar composite material preparation method based on microalgae
  • Magnetic biochar composite material preparation method based on microalgae
  • Magnetic biochar composite material preparation method based on microalgae

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preparation example Construction

[0027] The invention provides a method for preparing a microalgae-based magnetic bio-carbon composite material, such as figure 1 As shown, the preparation method at least includes the following steps:

[0028] S1, adding microalgae and water into a hydrothermal reactor to prepare a microalgae suspension;

[0029] S2, sequentially adding iron salt, organic acid and catalyst to the microalgae suspension, sealing and introducing a protective gas to replace the air in the reactor;

[0030] S3, placed in an oven for carbonization to obtain a microalgae-based magnetic bio-carbon composite material.

Embodiment 1

[0033] Accurately weigh 1.0g of freeze-dried green algae, 50ml of deionized water, add it to a 100ml hydrothermal reaction kettle, and add 3g of FeCl in sequence 3 , 3g of sodium acetate catalyst, 1g of oxalic acid, ultrasonic 10min after each substance is added, the reaction kettle is sealed and passed into N 2 The air in the kettle was replaced, and finally placed in an oven at 180°C for carbonization for 24 hours, cooled, filtered, washed, dried, and then vacuum-dried at 80°C for 12 hours to obtain a magnetic bio-carbon composite material.

[0034] Such as figure 2 Shown is the scanning electron microscope (SEM) image of the prepared magnetic bio-carbon composite. image 3 An enlarged view of the magnetic biocarbon composite. From figure 2 and image 3 It can be seen that the synthesized magnetic material is composed of a large number of microsphere particles, the size is micron, the surface is rough, and it is covered by a layer of white crystal-like particles. This ...

Embodiment 2

[0036] Accurately weigh 2.0g of Scenedesmus after freeze-drying treatment, 50ml of deionized water, add it to a 100ml hydrothermal reaction kettle, and add 1g of FeCl in sequence 3 , 2g of sodium acetate catalyst, 1g of acrylic acid, ultrasonic 10min after each substance is added, the reactor is sealed and then passed into N 2 The air in the kettle was replaced, and finally placed in an oven at 180°C for carbonization for 24 hours, cooled, filtered, washed, dried, and then vacuum-dried at 80°C for 12 hours to obtain a magnetic bio-carbon composite material.

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Abstract

The invention provides a magnetic biochar composite material preparation method based on microalgae. The preparation method at least includes the steps: firstly, adding microalgae and water in a hydrothermal reaction kettle to prepare a microalgae suspension; then successively adding an iron salt, an organic acid and a catalyst in the microalgae suspension, sealing, and then introducing a protective gas to displace air in the reaction kettle; placing in an oven, and carbonizing, to prepare a magnetic biochar composite material having the advantages of stable structure, controllable morphology, stronger magnetism and easy magnetic separation and having the surface rich in carboxyl functional groups. Compared with the prior art, by adding a small amount of the organic acid and the catalyst, the hydrothermal 'one-step method' is carried out to achieve primary biomass green preparation of the Fe3O4 magnetic biochar composite material, and the method is simple to operate, economic, efficient, and friendly to the environment, and has a relatively great potential application value.

Description

technical field [0001] The invention belongs to the fields of environmental protection and renewable resource utilization, and relates to a method for preparing a magnetic bio-carbon composite material, in particular to a method for preparing a magnetic bio-carbon composite material based on microalgae. Background technique [0002] Magnetic nano and microporous particle carbon materials are widely used in many fields such as biological science, medicine, biotechnology, environmental governance, electronics and non-destructive testing. At present, common magnetic biocarbon materials are mainly prepared by the following two methods. Method 1, prepared by impregnation combined with chemical precipitation. This method mainly includes the following steps: 1) Dissolve ferrite or iron salt in water, soak the carbon source in a brine solution at 60-80°C, drop by drop Strengthen the alkali to precipitate the iron salt, and soak for 0.5-5 hours; 2) After soaking, the solid particles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
Inventor 孙予罕朱春春孔令照苗改王健健汪靓唐志永
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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