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Porous carbon material prepared by self-modification of Bacillus and preparation method and application thereof

A porous carbon material, Bacillus technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, bacteria, etc., can solve the problems of long cultivation time, strong corrosion, environmental pollution, etc., and achieve low cost and high specific capacitance , Environmentally friendly effect

Active Publication Date: 2019-02-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the preparation process of this porous activated carbon material is simple, the cultivation time of algae needs 10 days and needs to be fed every day, and the alkali activator has strong corrosion to equipment and causes environmental pollution

Method used

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  • Porous carbon material prepared by self-modification of Bacillus and preparation method and application thereof
  • Porous carbon material prepared by self-modification of Bacillus and preparation method and application thereof
  • Porous carbon material prepared by self-modification of Bacillus and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Inoculate the Bacillus megaterium B-10 thalli stored on the LB slope into the LB liquid medium, and cultivate it for 18 hours at a temperature of 30° C. to obtain the seed liquid of Bacillus megaterium B-10; wherein the LB liquid medium The distribution ratio of each component is: peptone 10g, yeast powder 5g, sodium chloride 10g, distilled water 1L; the LB slope is based on the above formula with the addition of 15g / L agar;

[0052] (2) Centrifuge the Bacillus megaterium B-10 seed liquid obtained under the condition of 8000rpm for 5 minutes, discard the supernatant, and collect the thalline;

[0053] (3) Inoculate the collected Bacillus megaterium B-10 cells into high-nitrogen glucose medium at 2% inoculum size (the ratio of the volume of the transferred bacterial solution to the volume of the culture solution after inoculation), and at a temperature of 30°C, naturally pH, cultivated for 24h, and precipitated and separated to obtain bacterial thallus; wherein the r...

Embodiment 2

[0064] (1) Cultivate according to steps (1) and (2) in Example 1 to obtain the seed liquid of Bacillus megaterium B-10.

[0065] (2) Centrifuge the Bacillus megaterium B-10 seed liquid obtained under the condition of 8000rpm for 5 minutes, discard the supernatant, and collect the thalline;

[0066] (3) The collected Bacillus megaterium B-10 cells were inoculated in a high-nitrogen glucose medium at a 10% inoculum amount, cultured for 24 hours at a temperature of 30° C., at a natural pH, and separated by precipitation to obtain bacterial cells; wherein The proportion of each component of the high nitrogen glucose medium is: glucose 4g / L, (NH 4 ) 2 SO 4 4g / L, K 2 HPO 4 1g / L, KH 2 PO 4 1g / L, MgSO 4 ·7H 2 O0.2g / L, CaCl 2 0.01g / L, FeSO 4 ·7H 2 O 0.015g / L, MnSO 4 ·H 2 O 0.01g / L.

[0067] (4) Place the Bacillus megaterium B-10 thalline obtained in the previous step in a vacuum freeze dryer to obtain dry thalline to constant weight.

[0068] (5) Place the dried bacte...

Embodiment 3

[0072] (1) Cultivate according to steps (1) and (2) in Example 1 to obtain the seed liquid of Bacillus megaterium B-10.

[0073] (2) Centrifuge the Bacillus megaterium B-10 seed liquid obtained under the condition of 8000rpm for 5 minutes, discard the supernatant, and collect the thalline;

[0074] (3) The collected Bacillus megaterium B-10 cells were inoculated in a high-nitrogen glucose medium at a 5% inoculum amount, cultured for 36 hours at a temperature of 30° C., at a natural pH, and separated by precipitation to obtain bacterial cells; wherein the The proportion of each component of the high nitrogen glucose medium is: glucose 4g / L, (NH 4 ) 2 SO 4 6g / L, K 2 HPO 4 1g / L, KH 2 PO 41g / L, MgSO 4 ·7H 2 O0.2g / L, CaCl 2 0.01g / L, FeSO 4 ·7H 2 O 0.015g / L, MnSO 4 ·H 2 O 0.01g / L;

[0075] (4) Place the Bacillus megaterium B-10 thalline obtained in the previous step in a vacuum freeze dryer to obtain dry thalline to constant weight.

[0076] (5) Place the dried bact...

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Abstract

The invention discloses a porous carbon material prepared by self-modification of Bacillus and a preparation method and application thereof. The graded porous carbon material is prepared through changing self-accumulation PHA of an ingredient control bacterium (Bacillus megaterium B-10 with a preservation number of CGMCC No.15753) of a culture medium and directly adopting thalli collected via precipitation to carry out carbonization without any activation step. The bacterium self-modification derived porous carbon material has a developed pore structure. The porous carbon material is used as asupercapacitor electrode material, when the current density is 0.5 A / g, the specific volume of the material is 263 F / g, and when the current density is increased to 20 A / g, the specific volume of thematerial is maintained at 217 F / g, so that the material shows favorable capacitance and excellent rate performance. The preparation method has the advantages of being novel, simple to operate and lowin preparation cost; and the prepared material has the characteristics of being graded in pore size, large in specific surface area, good in electrical conductivity and excellent in electrochemical performance, and is an ideal electrode material for supercapacitors or batteries.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a porous carbon material prepared by self-modification of bacillus and its preparation method and application. Background technique [0002] Bacteria, as prokaryotes, have a strong cell wall and can maintain a complete cell system even in a relatively harsh environment. Importantly, they are cheap and abundant, "green" renewable biological resources provided by nature. Therefore, these microorganisms are expected to serve as biological templates for the production of nano- to micro-sized materials with some special properties, creating a series of materials with novel characteristics and properties. However, there are few reports on using bacterial materials as supercapacitor electrode materials. Sun (Energy & Environmental Science, 2012, 5(3):6206-6213.) et al. used Escherichia coli surface-loaded graphene oxide and combined it with cryocasting t...

Claims

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Application Information

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IPC IPC(8): C12N11/14C12N1/20H01G11/32H01G11/26H01G11/86C12R1/11
CPCH01G11/26H01G11/32H01G11/86C12N1/20C12N11/14Y02E60/13
Inventor 石岩张可菁卓胜男司梦莹颜旭柴立元杨志辉
Owner CENT SOUTH UNIV
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