A method for preparing titanium dioxide tube-based composite material by biological method

A technology of titanium dioxide and composite materials, which is applied in the field of preparing titanium dioxide tube-based composite materials by biological method, can solve the problems of secondary environmental pollution, low energy utilization rate and high processing cost

Active Publication Date: 2021-04-13
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current methods for synthesizing silver sulfide-supported titanium dioxide-based composite materials include electrochemical methods, thermal decomposition methods, continuous ion deposition methods, etc., most of which use toxic and harmful chemical reagents and require certain special conditions (such as high temperature and high pressure), not only It will cause secondary pollution to the environment, and the conditions are harsh, the processing cost is high, and the energy utilization rate is low

Method used

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  • A method for preparing titanium dioxide tube-based composite material by biological method
  • A method for preparing titanium dioxide tube-based composite material by biological method
  • A method for preparing titanium dioxide tube-based composite material by biological method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for biologically preparing titanium dioxide tube-based composite materials, comprising the steps of:

[0036] S1. Prepare LB medium: take tryptone 10g / L, yeast powder 5g / L, and NaCl 10g / L as the standard, weigh a certain amount of tryptone, yeast powder, and NaCl, add them to deionized water, mix well, and pack Seal it, sterilize it under high temperature and high pressure, and store it after cooling down for later use.

[0037] S2. Preparation of anaerobic medium: Weigh 4.766g of N-(2-hydroxyethyl)piperazine-N'-2-ethanesulfonic acid, 2.242g of sodium lactate, 0.46g of sodium chloride, 0.255g of ammonium sulfate, seven Magnesium sulfate hydrate 0.024g, trace element stock solution 5mL, ultrapure water 950mL, mix well, adjust pH to 7.0 with 0.1mol / L NaOH solution, set volume to 1L and divide into serum bottles, fill with nitrogen for 5min to exhaust The dissolved oxygen in the bottle is sealed with a butyl rubber stopper, capped, sterilized at high temperature ...

Embodiment 2

[0044] A kind of preparation method that biological method prepares titanium dioxide tube-based composite material, its steps are identical with embodiment 1, difference is:

[0045] In step S1, the amounts of each raw material prepared were tryptone 8g / L, yeast powder 7g / L, and NaCl 8g / L.

[0046] In the S2 step, with the final constant volume of 1L as the standard, the dosages of the prepared raw materials are respectively: 4.5g of N-(2-hydroxyethyl)piperazine-N'-2-ethanesulfonic acid, 2.5g of sodium lactate, and Sodium chloride 0.4g, ammonium sulfate 0.3g, magnesium sulfate heptahydrate 0.04g, trace element stock solution 2mL, ultrapure water 950mL; wherein the concentration of NaOH solution used for pH adjustment is 0.05mol / L; , the amount of each raw material added is: nitrilotriacetic acid 1.0g, magnesium sulfate 2.0g, calcium chloride dihydrate 0.5g, sodium chloride 1.5g, manganese sulfate 0.3g, zinc sulfate heptahydrate 0.01g, heptahydrate 0.15g of ferrous sulfate, 0....

Embodiment 3

[0052] A method for biologically preparing titanium dioxide tube-based composite material, the steps of which are the same as in Example 1, except that:

[0053] In the S1 step, the amounts of each raw material prepared were respectively 12 g / L of tryptone, 3 g / L of yeast powder, and 12 g / L of NaCl.

[0054] In the S2 step, with the final constant volume of 1 L as the standard, the dosages of each raw material prepared are: 5.0 g of N-(2-hydroxyethyl)piperazine-N'-2-ethanesulfonic acid, 2.0 g of sodium lactate, and Sodium chloride 0.5g, ammonium sulfate 0.2g, magnesium sulfate heptahydrate 0.01g, trace element stock solution 7mL, ultrapure water 950mL; wherein the concentration of NaOH solution used for pH adjustment is 0.2mol / L; when preparing the trace element stock solution , the amount of each raw material added is: nitrilotriacetic acid 2.0g, magnesium sulfate 3.0g, calcium chloride dihydrate 1.5g, sodium chloride 0.5g, manganese sulfate 0.7g, zinc sulfate heptahydrate 0....

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Abstract

The invention discloses a biological method for preparing a titanium dioxide tube-based composite material, which comprises preparation of LB culture medium, preparation of anaerobic culture medium, inoculation and cultivation of MR‑1 bacteria, synthesis of titanium dioxide nanotubes (TNTs), and preparation of mother liquor , the preparation of titanium dioxide nanotube-based composite materials and other steps, using the microorganism Shewanella oneidensis MR‑1 taken from the environment as a biological reducing agent and template agent, to synthesize Ag in situ on the TNTs tube wall 2 S NPs, thereby forming Ag in one step 2 S / TNTs nanotube-based composite material, this method is not only economical, effective, low-carbon and environmentally friendly, it avoids the addition of chemical reagents, and does not consume any energy. At the same time, the Ag produced by this method 2 S / TNTs nanotube-based composite material is used for catalytic reduction of p-nitrophenol, an organic pollutant that is difficult to degrade in the environment and has biotoxicity, and has high catalytic efficiency.

Description

technical field [0001] The invention relates to a method for a titanium dioxide nanotube-based composite material, in particular to a method for preparing a titanium dioxide nanotube-based composite material by a biological method. [0002] technical background [0003] Silver sulfide nanoparticles are narrow-band semiconductors with high optical properties, catalytic properties, and chemical stability, and are widely used in photovoltaic cells, ion conductors, infrared detectors, and catalytic degradation of pollutants. However, because silver sulfide nanoparticles have a large specific surface energy and are easy to agglomerate, generally silver sulfide nanoparticles are loaded on a certain carrier to improve their dispersion and stability. One-dimensional titanium dioxide nanotubes (TiO 2 Nanotubes (TNTs for short) have a larger specific surface area and can provide more active sites, and one-dimensional nanotubes are conducive to electron transfer to improve catalytic e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P3/00C12R1/01
CPCC12P3/00
Inventor 石先阳杨迷
Owner ANHUI UNIVERSITY
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