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Gold/titanium dioxide nano-compound and preparation method and application thereof

A nanocomposite, titanium dioxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of easy aggregation of gold nanoparticles and many active sites , to achieve the effect of simple preparation process, many active sites, and good peroxidase catalytic activity

Active Publication Date: 2017-06-27
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanocomposite structure of the present invention solves the problem that gold nanoparticles are easy to aggregate, has many active sites, and has excellent performance as a peroxide mimetic enzyme

Method used

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  • Gold/titanium dioxide nano-compound and preparation method and application thereof
  • Gold/titanium dioxide nano-compound and preparation method and application thereof
  • Gold/titanium dioxide nano-compound and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare gold / titanium dioxide nanocomposite, the steps are as follows:

[0037] 1. Preparation of Helical Carbon Fibers

[0038]Take 1.41 g of potassium sodium tartrate tetrahydrate (i.e. potassium sodium tartrate tetrahydrate) in a 50 mL volumetric flask, add water to prepare a 0.1M potassium sodium tartrate solution for later use. Take 0.85 g of copper chloride dihydrate in a 50 mL volumetric flask, add water to prepare a 0.1M copper chloride solution. All the 50 mL potassium sodium tartrate solution prepared above was transferred to a 500 mL beaker, and under the condition of vigorous stirring, the 50 mL cupric chloride solution prepared above was slowly added dropwise to the potassium sodium tartrate solution, and allowed to stand for 5 After 1 min, it was vacuum filtered to obtain a light blue copper tartrate filter cake. After washing the filter cake with absolute ethanol three times, it was transferred to a 110°C oven for drying for 1h, and then transferred to a...

Embodiment 2

[0047] Prepare gold / titanium dioxide nanocomposite, the steps are as follows:

[0048] 1. Preparation of Helical Carbon Fibers

[0049] With embodiment 1;

[0050] 2. Preparation of Gold / Carbon Helical Fiber Composite

[0051] Take 5 g of spiral carbon fiber, dissolve it in a beaker filled with 50 mL of absolute ethanol, ultrasonicate for 13 min, and then drop the mixture evenly on the glass slide with a rubber dropper. After natural drying, put the glass slide into the In the HITACHI E-1010 ion sputtering instrument, gold was used as the target material, the control current was 10 mA, and the gold nanoparticles were sputtered for 80 s to obtain the gold-coated carbon helical fiber composite (that is, the gold / carbon helical fiber composite ), the powder on the glass sheet is scraped off, which is the gold / carbon helical fiber composite;

[0052] 3. Preparation of TiO / Au / Carbon Helical Fiber Composite

[0053] Take 5 g of gold / carbon helical fiber composite, dissolve it in...

Embodiment 3

[0057] Prepare gold / titanium dioxide nanocomposite, the steps are as follows:

[0058] 1. Preparation of Helical Carbon Fibers

[0059] With embodiment 1;

[0060] 2. Preparation of Gold / Carbon Helical Fiber Composite

[0061] Take 5 g of spiral carbon fiber, dissolve it in a beaker filled with 50 mL of absolute ethanol, ultrasonicate for 10 min, and then drop the mixture evenly on the glass slide with a rubber dropper. After natural drying, put the glass slide into the In the HITACHI E-1010 ion sputtering instrument, gold was used as the target material, the control current was 10 mA, and the gold nanoparticles were sputtered for 120 s to obtain the gold-coated carbon helical fiber composite (that is, the gold / carbon helical fiber composite ), the powder on the glass sheet is scraped off, which is the gold / carbon helical fiber composite;

[0062] 3. Preparation of TiO / Au / Carbon Helical Fiber Composite

[0063] Take 5 g of the gold / carbon helical fiber composite, dissolve ...

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Abstract

The invention discloses a gold / titanium dioxide nano-compound and a preparation method and application thereof.The preparation method comprises the steps that helical carbon fiberis used as a template, gold particles can be sputtered on the surface of carbon fiber through ion sputtering, then a layer of titanium dioxidedeposits through an atomic layer deposition technology, and annealing treatment is conducted on the obtained titanium dioxide / gold / helicalcarbon fiber compound to obtain a product. In the product, the titanium dioxide exists in the form of the hollow helical titanium dioxide fiber, and the gold nano-particles are dispersed in the inner surface of the hollow helical titanium dioxide fiber. The gold / titanium dioxide nano-compound with a hollow helical structure is prepared for the first time, the problem that the gold nano-particles easily aggregate is solved, more active sites exist, the compound has the better peroxide mimic enzyme catalysis activity and overcomes the shortcoming thatnatural enzyme is difficult to extract andis easy to inactivate and degenerate at high temperature, a catalytic temperature range of superoxide mimic enzymeis widened, and the compound has the potential and wide application value in the fields of biological detection, analysis and the like.

Description

technical field [0001] The invention relates to a hollow helical gold / titanium dioxide nanocomposite, and also relates to a preparation method of the nanocomposite and an application of the nanocomposite as a peroxide mimetic enzyme, belonging to the technical field of nanomaterials and mimetic enzymes. Background technique [0002] Peroxidase is a kind of natural enzyme with heme as the prosthetic group. It can efficiently catalyze various oxides or peroxides to oxidize other substances in organisms, participate in detoxification of harmful substances, oxidation of fatty acids, regulation of oxygen concentration, nitrogen-containing Physiological processes such as the metabolism of substances play an indispensable role in living organisms. Peroxidase can degrade hydrogen peroxide, an important intermediate substance in the body, in biological tissues. There have been a lot of researches on the analysis methods related to hydrogen peroxide content. Therefore, it is widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52G01N21/33
CPCG01N21/33B01J23/52B01J35/393B01J35/58B01J35/40
Inventor 王桂振万耿平彭响娥吴丽红冯玉红
Owner HAINAN UNIVERSITY
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