Graphene oxide-silver nanoparticle-titanium dioxide nanotube array material as well as preparation method and application of graphene oxide-silver nanoparticle-titanium dioxide nanotube array material

A nanotube array, silver nanoparticle technology, applied in material excitation analysis, Raman scattering and other directions, can solve the problems of increased surface-enhanced Raman scattering detection cost, pollution, disposable use, etc., achieve good photocatalytic activity, realize Self-cleaning and improved sensitivity

Inactive Publication Date: 2014-12-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the usual SERS substrate materials are contaminated due to the adsorption of detection molecules on the surface, and generally can only be used once and cannot be recycled repeatedly, which greatly increases the cost of surface-enhanced Raman scattering detection.

Method used

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  • Graphene oxide-silver nanoparticle-titanium dioxide nanotube array material as well as preparation method and application of graphene oxide-silver nanoparticle-titanium dioxide nanotube array material
  • Graphene oxide-silver nanoparticle-titanium dioxide nanotube array material as well as preparation method and application of graphene oxide-silver nanoparticle-titanium dioxide nanotube array material
  • Graphene oxide-silver nanoparticle-titanium dioxide nanotube array material as well as preparation method and application of graphene oxide-silver nanoparticle-titanium dioxide nanotube array material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of titania nanotube array material: the titanium sheet was ultrasonically cleaned in ethanol, acetone, and deionized water for 30 minutes, and then polished in a mixed solution of hydrogen fluoride, nitric acid, and water with a volume ratio of 1:4:5; In the two-electrode electrochemical reaction system, the titanium sheet is used as the anode, and the platinum sheet is used as the cathode. The molar concentration is 0.2mol / L ammonium fluoride, the molar concentration is 0.5mol / L phosphoric acid, the volume percentage concentration is 5% glycerol and the volume percentage A mixed aqueous solution with a concentration of 40% ethylene glycol was used as the reaction electrolyte solution, and the anodic oxidation method was used to react at a constant temperature of 25°C for 2 hours under the condition of a constant voltage of 30V, and then fully rinsed with deionized water and dried naturally to obtain an amorphous form Titanium dioxide nanotube arrays of t...

Embodiment 2

[0049](1) Preparation of titania nanotube array material: the titanium sheet was ultrasonically cleaned in ethanol, acetone, and deionized water for 30 minutes, and then polished in hydrogen fluoride / nitric acid / water solution with a volume ratio of 1:4:5; In the electrochemical reaction system, the titanium sheet is used as the anode, and the platinum sheet is used as the cathode. The molar concentration is 0.15mol / L ammonium fluoride, the molar concentration is 0.4mol / L phosphoric acid, the volume percentage concentration is 6% glycerol and the volume percentage concentration is A mixed aqueous solution of 35% ethylene glycol was used as the reaction electrolyte solution, and the anodic oxidation method was used to react at a constant temperature of 25°C for 3 hours under the condition of a constant voltage of 30V, and then fully rinsed with deionized water and dried naturally to obtain amorphous titanium dioxide. array of nanotubes. The amorphous titania nanotube array was ...

Embodiment 3

[0054] (1) Preparation of titania nanotube array material: the titanium sheet was ultrasonically cleaned in ethanol, acetone, and deionized water for 30 minutes, and then polished in hydrogen fluoride / nitric acid / water solution with a volume ratio of 1:4:5; In the electrochemical reaction system, the titanium sheet is used as the anode, and the platinum sheet is used as the cathode. The molar concentration is 0.3mol / L ammonium fluoride, the molar concentration is 0.50mol / L phosphoric acid, the volume percentage concentration is 7% glycerol and the volume percentage concentration is A mixed aqueous solution of 45% ethylene glycol was used as the reaction electrolyte solution, and the anodic oxidation method was used to react at a constant temperature of 25°C for 3 hours under the condition of a constant voltage of 20V, and then fully rinsed with deionized water and dried naturally to obtain amorphous titanium dioxide. array of nanotubes. The amorphous titania nanotube array was...

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Abstract

The invention provides a graphene oxide-silver nanoparticle-titanium dioxide nanotube array material which comprises a titanium dioxide nanotube array, silver nanoparticles and graphene oxide layers, wherein the silver nanoparticles are deposited on the surface of a pipe orifice of the titanium dioxide nanotube array and are evenly distributed; the graphene oxide layers are respectively deposited on the surfaces of the silver nanoparticles and are respectively of a single-layer structure. The invention also provides a preparation method of the graphene oxide-silver nanoparticle-titanium dioxide nanotube array material and an application of the graphene oxide-silver nanoparticle-titanium dioxide nanotube array material as a surface-enhanced Raman scattering substrate. According to the graphene oxide-silver nanoparticle-titanium dioxide nanotube array material, the silver nanoparticles with an electromagnetic field enhancement effect and graphene oxide with a chemical enhancement effect and an interface adsorption effect are sequentially deposited onto the titanium dioxide nanotube array with photocatalytic activity, and the obtained material has a Raman enhancement effect and a photocatalytic self-cleaning function, can be taken as the surface-enhanced Raman scattering active substrate and is applied to the high sensitivity detection and the circulation detection of organic matter.

Description

technical field [0001] The invention belongs to the field of surface-enhanced Raman scattering substrate materials, and relates to a graphene oxide-silver nanoparticle-titanium dioxide nanotube array material, a preparation method of the material and its highly sensitive detection in the field of surface-enhanced Raman application and self-cleaning cycle detection application. Background technique [0002] The surface-enhanced Raman scattering (SERS) effect refers to that in some specially prepared metal good conductor surfaces or sols, in the excitation region, due to the enhancement of the electromagnetic field on the surface or near the surface of the sample, the Raman scattering signal of the adsorbed molecules is larger than that of the ordinary Raman scattering signal. The phenomenon that the Mann scattering signal is greatly enhanced. Because of its many advantages such as rapid detection, sensitivity, and non-destructiveness, it has been applied to biological analys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 谢一兵孟玉洁
Owner SOUTHEAST UNIV
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