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Microorganism for preparing broccoli-shaped antimony sulfide and application of microorganism

A technology of broccoli and microorganisms, which is applied in the field of microorganisms for preparing broccoli-like antimony sulfide, can solve the problems of difficult reduction and high toxicity, and achieves the effects of accelerated photodegradation, environmental friendliness and low technical cost.

Active Publication Date: 2019-09-20
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high toxicity and difficult reduction of Sb(V) compounds, there is no use of microorganisms to synthesize Sb 2 S 3 report on nanomaterials

Method used

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  • Microorganism for preparing broccoli-shaped antimony sulfide and application of microorganism
  • Microorganism for preparing broccoli-shaped antimony sulfide and application of microorganism
  • Microorganism for preparing broccoli-shaped antimony sulfide and application of microorganism

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The above obtained strain X3 (0.5 g / L dry weight), Sb(V) (0.1 mM) and 1 mM S 2 o 3 2- (or SO 3 2- ) in 100 mL inorganic salt medium, the salinity was 2%, the pH was adjusted to 7, then 18 mM sodium lactate was added, nitrogen was exposed for 15 min, at 30 o In the anaerobic incubator of C, the reaction was protected from light for 5 days, and the color change can be found in figure 1 .

[0035] The inorganic salt medium is per liter, 1 g NH 4 Cl, 0.8 g Na 2 HPO 4 , 0.2 g KH 2 PO 4 , 0.2 gMgCl 2 ·7H 2 O, 0.1 g CaCl 2 2H 2 O, 20 g NaCl, the balance is deionized water.

[0036] Depend on figure 1 It can be seen that X3 can turn orange-yellow in the presence of antimony and thiosulfate or sulfite, which is verified as Sb 2 S 3 , the darker the color, the better the restoration effect. The results show that in the current reaction system, the reaction system with sulfite addition is lighter than the reaction system with thiosulfate addition at the same ti...

Embodiment 2

[0038] The obtained strain X3 (0.5 g / L), Sb(V) (0.2 mM) and 1 mM S 2 o 3 2- Mix evenly in 100 mL of inorganic salt medium, set the salinity to 2%, adjust the pH to 7, then add 18 mM sodium lactate, aerate with nitrogen for 15 min, at 30 o React in an anaerobic incubator in C for 5 days in the dark, centrifuge the obtained mixture (10000 rpm, 5 min), collect the precipitate and place it in deionized water for ultrasonic treatment for 1 h, after centrifugation, wash the precipitate with 1% anionic surfactant Sodium dialkylsulfonate resuspended, 90 o C hot water bath for 45 min, and then centrifuge again (10000 rpm, 10 min) to freeze-dry the precipitate, which is Sb 2 S 3 (see figure 2 ).

[0039] The inorganic salt medium is per liter, 1 g NH 4 Cl, 0.8 g Na 2 HPO 4 , 0.2 g KH 2 PO 4 , 0.2 gMgCl 2 ·7H 2 O, 0.1 g CaCl 2 2H 2 O, 20 g NaCl, the balance is deionized water.

[0040] Depend on figure 2 Through the verification of X-ray diffraction energy spectrum, i...

Embodiment 3

[0043] The obtained strain X3 (0.7 g / L), Sb(V) (1 mM) and 2 mM SO 3 2- Mix well in 100 mL of inorganic salt medium, adjust the pH to 7.2 with a salinity of 3%, then add 18 mM glucose, aerate with nitrogen for 15 min, at 30 o The anaerobic incubator in C was reacted in the dark for 7 days, and the obtained mixture was centrifuged (10000 rpm, 5 min), and the precipitate was placed in deionized water for ultrasonic treatment for 1 h. After centrifugation, the precipitate was treated with 1.5% anionic surfactant Sodium dialkylsulfonate resuspended, 95 o C hot water bath for 60 min, and then centrifuge again (10000 rpm, 10 min) to freeze-dry the precipitate, which is Sb 2 S 3 .

[0044] Use energy spectrometer to verify the elements contained in the obtained material. According to the results of energy spectrum, the material is mainly composed of Sb and S elements, and there are some residual salts (such as Na, Cl, P) and biomass elements (such as C, N, O, P) ( Figure 4 ). ...

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Abstract

The invention belongs to the technical field of environmental engineering water treatment and particularly relates to a microorganism for preparing broccoli-shaped antimony sulfide and application of the microorganism. The microorganism refers to marine Halomonas sp.X3 which is preserved in the China Center for Type Culture Collection located in Wuhan University on May 30, 2019, and a preservation number is CCTCC M 2019409. The strain is an indigenous microorganism screened from marine sediments and can be used for preparing nano antimony sulfide by adopting potassium pyroantimonate and sodium thiosulfate or sodium sulfite as precursors. Nano antimony sulfide prepared from the microorganism is broccoli shaped and can serve as a photocatalyst for accelerating light degradation of azo dye compounds. Currently, antimony sulfide is prepared according to chemical methods mostly. Shaped-controllable antimony sulfide is prepared from the microorganism for the first time, and high innovativeness is realized.

Description

technical field [0001] The invention relates to the technical field of environmental engineering water treatment, in particular to a microorganism for preparing broccoli-like antimony sulfide and its application. Background technique [0002] In recent years, binary metal chalcogenides have attracted extensive attention from researchers because of their excellent optoelectronic properties. Metal chalcogenides have relatively narrow band gaps, which can widely absorb visible light and near-infrared light in sunlight, and have good application prospects in photovoltaic and thermoelectric devices. Among them, antimony trisulfide (Sb 2 S 3 ) has a bandgap of about 1.6 eV, which is close to the optimal theoretical bandgap value of single-junction solar cells, and has been widely used in solar cells and semiconductor optoelectronic / voltaic devices. In addition, Sb 2 S 3 Nanomaterials also have high specific surface areas and can also be used in photocatalytic reactors based o...

Claims

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Application Information

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IPC IPC(8): C12N1/20C12P3/00C01G30/00C02F1/30C12R1/01C02F101/38
CPCC01G30/008C01P2004/30C02F1/30C02F2101/38C02F2305/10C12P3/00C12N1/205C12R2001/01
Inventor 张海坤解静仪孙延瑜胡晓珂
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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