Method for preparing nano metal sulfides

A nano-metal and sulfide technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of product impurity and high temperature, and achieve easy-to-control particle size, uniform distribution, and easy construction Effect

Inactive Publication Date: 2007-02-07
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(3) The synthetic method of pyrolysis reaction is to utilize the precursor compound containing M-S bond to decompose at higher temperature, synthesize metal sulfide, reaction needs high temperature, and the product obtained is impure

Method used

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  • Method for preparing nano metal sulfides
  • Method for preparing nano metal sulfides
  • Method for preparing nano metal sulfides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Configure the medium according to the following components: sodium acetate 1500mg; CaCl 2 .2H 2 O 80mg; MgSO 4 .7H 2 O 150mg; EDTA 20mg; Yeast extract 1200mg; K 2 HPO 4 1000mg; (NH 4 ) 2 SO 4 1500mg; KH 2 PO 4 800mg; FeSO 4 .7H 2 O 10mg trace element solution 3ml: deionized water 1500ml. The pH of the medium was 7.

[0040] Wherein the trace element solution is composed of: H 3 BO 3 240 mg; Na 2 MoO 4 .2H 2 O 70mg; CuSO 4 7 mg; MnSO 4 .4H 2 O 200mg; ZnSO 4 .7H 2 O 24mg; deionized water 1650ml.

[0041] Inoculate 1 / 20 portion of Rhodobacter sphaeroides into the sterilized culture medium, and cultivate it for 20 days under light of 2500 lux, room temperature, and anaerobic conditions, as the inoculum;

[0042] The cultured Rhodobacter sphaericus was centrifuged at 6000rpm for 10min, the precipitate was washed with normal saline and centrifuged twice. Then mix the obtained 10% concentrated bacteria with 10% polyvinyl alcohol solution cooled to 3...

Embodiment 2

[0046] Using Rhodopseudomonas palustris, adding 0.20mol / L of Pb(AC) a 10ml, transformation culture time 36h, other conditions and steps are identical with embodiment 1, the product nano-lead sulfide average particle diameter that obtains is 25nm, productive rate 90%, black powder, x-ray analysis result is cubic structure, and purity is high.

Embodiment 3

[0048] Rhodopseudomonas palustris (Rhodopseudomonas palustris) and spherical red bacillus (Rhodobactersphaeroides) were mixed and immobilized by 1:1, and the transformation culture time was 40h. Other conditions and steps were the same as in Example 1. 23nm, 89% yield, black powder, X-ray analysis shows cubic structure, high purity.

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Abstract

A method of preparing nano-metal sulfide by microorganism, it comprises the steps of: it adapts the photosynthetic bacterium as the inoculants, which is fixed and activated; we put metal salts into substrate, then antisepticises, inoculates the bacterium, incubated at room temperature, illumination, culture condition for 12-72 hours; after ageing, we remove the supernatant, fluid, wash and dry the product, and then obtains the nano-metal sulfide. The products particulate is quite small, distributing is symmetrical, and has a high purity. It is prone to control the reaction with no pollution in the process, and low cost, and is prone to industrialization.

Description

technical field [0001] The invention relates to a preparation technology of nanometer metal sulfide, in particular to a method for preparing nanometer metal sulfide by adopting a microbial method. Background technique [0002] Due to their quantum size effect and surface effect, nano-metal sulfide semiconductor particles have excellent optical, electrical, magnetic, catalytic and other properties, and have broad application prospects in electronics, biology, coatings and other civilian industries. Among them, nano-lead sulfide and zinc sulfide are the main infrared detection materials used in military infrared photoelectric systems. Infrared materials are the basis of infrared photoelectric detection technology. Various missile guidance, infrared early warning, observation and targeting are inseparable from infrared detection technology. Therefore, in today's increasingly serious environmental pollution, for the preparation of nano-metal sulfide semiconductors, a clean proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P3/00C12R1/01
Inventor 白红娟张肇铭
Owner SHANXI UNIV
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