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Silver/titanium dioxide composite heterostructure and preparation method thereof

A titanium dioxide and heterostructure technology, which is applied in the field of metal-semiconductor composite heterostructure material preparation, can solve problems such as rarely found, and achieve the effects of improving photocatalytic efficiency, reducing photocatalytic effect, and expanding response range.

Inactive Publication Date: 2014-04-16
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently, for Ag and TiO 2 Most of the research on nanoparticle composites has focused on the deposition of noble metal nanoparticles on TiO 2 The surface of the nanoparticles forms a heterostructure, and it is rarely found that the TiO 2 Materials deposited on the surface of silver nanowires heterogeneous structure report, among them, silver nanowires and TiO 2 The formed bead chain heterostructure has not been reported

Method used

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  • Silver/titanium dioxide composite heterostructure and preparation method thereof
  • Silver/titanium dioxide composite heterostructure and preparation method thereof
  • Silver/titanium dioxide composite heterostructure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1.1 Disperse 0.1 mmol silver nanowires in 0.1 mL deionized water and immerse for 12 hours to obtain a suspension;

[0057] 1.2 Add 20 mL of ethanol and 100 μL of thioglycolic acid to the silver nanowire suspension described in Example 1.1, and stir well;

[0058] 1.3 Add 0.5 mL of tetrabutyl titanate to the mixture described in Example 1.2, stir and mix evenly;

[0059] 1.4 Transfer the mixed solution described in Example 1.3 to a 50 mL reactor, and react at 150 ℃ for 10 h.

[0060] 1.5 The sample obtained in Example 1.4 was centrifuged and washed to prepare silver nanowires and TiO 2 Bead-chain heterogeneous structure (such as figure 1 As shown), the average diameter of titanium dioxide spheres is 600 nm, and the diameter of silver nanowires is 40 nm.

Embodiment 2

[0062] 2.1 Disperse 0.1 mmol silver nanowires in 0.1 mL deionized water and soak for 4 hours to obtain a suspension;

[0063] 2.2 Add 20 mL methanol and 20 μL thioglycolic acid to the silver nanowire suspension described in Example 2.1, and stir well;

[0064] 2.3 Add 0.5 mL of tetrapropyl titanate to the mixture described in Example 2.2, stir and mix evenly;

[0065] 2.4 Transfer the mixed solution described in Example 2.3 to a 50 mL reactor, and react at 150°C for 10 h.

[0066] 2.5 The sample obtained in Example 2.4 was centrifuged and washed to prepare silver nanowires and TiO 2 Bead-chain heterostructure, the average diameter of titanium dioxide spheres is 560 nm, and the diameter of silver nanowires is 10 nm.

Embodiment 3

[0068] 3.1 Disperse 0.1 mmol silver nanowires in 0.1 mL deionized water and immerse for 8 hours to obtain a suspension;

[0069] 3.2 Add 20 mL of propanol and 50 μL of thioglycolic acid to the silver nanowire suspension described in Example 3.1, and stir evenly;

[0070] 3.3 Add 0.025 mL of isopropyl titanate to the mixture described in Example 3.2, stir and mix evenly;

[0071] 3.4 Transfer the mixed solution described in Example 3.3 to a 50 mL reactor, and react at 150°C for 10 hours.

[0072] 3.5 The sample obtained in Example 3.4 was centrifuged and washed to prepare silver nanowires and TiO 2 Bead-chain heterostructure, the average diameter of titanium dioxide spheres is 200 nm, and the diameter of silver nanowires is 60 nm.

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Abstract

The invention discloses a silver / titanium dioxide composite heterostructure. The silver / titanium dioxide composite heterostructure comprises a silver nanowire component and a titanium dioxide component, wherein a titanium dioxide shell covered with the silver nanowire can form a nuclear shell heterostructure, and a titanium dioxide ball is bunched on the silver nanowire so as to form a bradde chain heterostructure. The heterostructure provided by the invention has the good electricity-conduction and heat-conduction property of the silver, the heterostructure of a noble metal and a semiconductor photocatalyst is formed, the effective separation of electrons and holes is benefited, the photocatalytic degradation organic matter property is enhanced, the disadvantages that the chemical stability of the silver is poor, the surface of the silver is easy to oxidize, and the silver / titanium dioxide composite heterostructure has the wide application prospect on the photocatalysis and new energy field. The invention also discloses a preparation method, the operation of the method is simple, the controllability is strong, the repeatability is good, the heterostructures of different shapes are obtained through adjusting the collocation of a reagent, the size of the diameter of a TiO2 ball and the thickness of a titanium dioxide shell layer are adjusted by virtue of adjusting the quantity of a titanium source, and the preparation method has strong practicability.

Description

technical field [0001] The invention relates to a composite heterostructure of silver nanowires and titanium dioxide and a preparation method thereof, and belongs to the technical field of preparation of metal and semiconductor composite heterostructure materials. Background technique [0002] In recent years, due to the potential advantages of core-shell nanostructures in research fields such as optoelectronics, catalysis, and photocatalysis, it has attracted widespread attention. Among these materials, Ag and TiO 2 The core-shell structure research is particularly prominent, not only because TiO 2 It has potential application value in photoelectrochemical activity, solar energy conversion and photocatalyst, and the surface-enhanced Raman effect, localized surface plasmon resonance and fluorescence effect of silver nanomaterials have shown some unique properties in the direction of chemical and biological sensitivity. In addition, separate noble metal particles are prone...

Claims

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Application Information

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IPC IPC(8): B01J23/50B82Y30/00
Inventor 杨萍贾长超王俊鹏车全德
Owner UNIV OF JINAN
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