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Biosynthesis method of FeS-coated rGO composite material

A technology for biosynthesis and composite materials, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of harsh reaction conditions, environmental pollution, high energy consumption of chemical synthesis methods, and achieve high selectivity, Easy to operate and easy to handle

Active Publication Date: 2020-06-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of high energy consumption, harsh reaction conditions, difficult control of catalytic activity, and environmental pollution in chemical synthesis methods, the present invention discloses a FeS@rGO composite material The biosynthesis method achieved a technical breakthrough in the uniform distribution of FeS nanoparticles on the surface of rGO

Method used

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  • Biosynthesis method of FeS-coated rGO composite material
  • Biosynthesis method of FeS-coated rGO composite material
  • Biosynthesis method of FeS-coated rGO composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Cultivation of Shewanella: select strain Oneida Shewanella ( Shewanella oneidensis MR-1), purchased from ATCC American Type Culture Collection, strain number ATCC700550; add 200 mL of LB medium (containing yeast extract 5 g / L, tryptone 10 g / L and sodium chloride 5 g / L L, pH=7) was inserted into Shewanella species, cultured at a temperature of 30 °C and a shaking speed of 200 rpm for 12 h to obtain a bacterial liquid;

[0032] (2) Construction of the buffer system: its specific components include Na 2 HPO 4 12H 2 O 17.8 g / L, KH 2 PO 4 3 g / L, NaCl 0.5 g / L, NH 4 Cl 0.5g / L, 18 mM sodium lactate, CaCl 2 0.1 mM, MgSO 4 1 mM, GO 50 mg / L;

[0033] (3) GO is converted into rGO; the cultured Shewanella is taken out, and the concentration is controlled at OD according to the concentration conversion 600=0.5, centrifuge the bacteria sludge and disperse it into the mixed system in step (2). The conditions of constant temperature shaking culture are controlled at a t...

Embodiment 2

[0046] It is basically the same as in Example 1, only the final concentration of the added ferric chloride and sodium thiosulfate is controlled to 1 mM, and the FeS@rGO composite material is obtained, which is marked as ②; XRD is carried out on the FeS@rGO prepared in this example characterization.

Embodiment 3

[0048] It is basically the same as in Example 1, only the final concentration of the added ferric chloride and sodium thiosulfate is controlled to 5 mM, and the FeS@rGO composite material is obtained, which is marked as ③; XRD is carried out on the FeS@rGO prepared in this example characterization.

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Abstract

The invention belongs to the field of material synthesis, and particularly relates to a biosynthesis method of a FeS-coated rGO composite material. According to the invention, dissimilatory metal reducing bacteria are utilized to decompose organic matters to generate electrons in the metabolic process, and GO is converted into rGO; and then water-soluble sulfate and ferric iron are used as final electron acceptors to obtain the biosynthetic FeS-coated rGO composite material, and the composite material can be directly used for removing Cr<6+>. The FeS nano-particles biosynthesized by the methodare regular in morphology and have a smaller size effect, and the technical breakthrough that the FeS nano-particles are uniformly anchored to rGO lamellas is realized. The biosynthesis method of theFeS-coated rGO composite material disclosed by the invention is wide in raw material source, simple and convenient to operate, high in reaction atom economy and environment-friendly, and the application prospect of the FeS-coated rGO composite material in the fields of environment, catalysis, optics, sensing, electrochemical energy storage performance and the like is further expanded.

Description

technical field [0001] The invention belongs to the field of material synthesis, and in particular relates to a biosynthesis method of FeS@rGO material. Background technique [0002] Nanoscale ferrous sulfide (FeS) is widely used in environmental pollution remediation due to its unique molecular structure and excellent surface chemical properties. It mainly fixes heavy metal ions in water or soil effectively through adsorption, ion exchange or precipitation. However, due to the characteristics of FeS being easily oxidized and easily aggregated, its mobility in water is poor, making the actual restoration effect unsatisfactory. [0003] Graphene materials have excellent optical, electrical, and mechanical properties, and have important application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery, and are considered to be a revolutionary material in the future. Since the surface of graphene is rich in functional groups, has high ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J37/36C12P39/00C12P3/00C02F1/00C02F101/22C12R1/01
CPCB01J27/043B01J37/36C12P39/00C12P3/00C02F1/00C02F2101/22
Inventor 徐自爱雍阳春俞洋洋
Owner JIANGSU UNIV
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