Method for preparing TiO2 nano-wires loaded with gold particles at top ends

A technology of gold particles and nanowires, which is applied in the field of preparation of surface micro-nano functional structures, can solve the problems of poor uniformity of nanowires, weak controllability of the size of noble metal particles and nanowires, achieve size controllability, and accelerate photogenerated electron transfer Speed, evenly distributed effect

Inactive Publication Date: 2019-03-01
JIANGSU UNIV
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  • Application Information

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Problems solved by technology

[0004] In order to realize the loading of noble metal particles on titanium dioxide nanowires, the current methods mainly include the polyol process heated by microwave radiation and the photochemical deposition method, but the uniformity of the nanowires prepared by this method is poor, and the size of the noble metal particles and nanowires less controllable

Method used

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  • Method for preparing TiO2 nano-wires loaded with gold particles at top ends
  • Method for preparing TiO2 nano-wires loaded with gold particles at top ends
  • Method for preparing TiO2 nano-wires loaded with gold particles at top ends

Examples

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example 1

[0023] Example 1: First, use magnetron sputtering for 20 seconds to coat gold on the surface of the Ti sheet after ultrasonic cleaning, then place the Ti sheet after the gold-coated film in a muffle furnace with a heating rate of 5°C / min, heat it up to 700°C and keep it warm After 2 hours, after cooling with the furnace temperature, short crystalline TiO with gold particles on the top can be directly prepared on the surface of the titanium substrate. 2 Nanowires.

example 2

[0024] Example 2: First, use magnetron sputtering to coat gold on the surface of the Ti sheet after ultrasonic cleaning for 15 minutes, then place the gold-coated Ti sheet in a muffle furnace with a heating rate of 5°C / min, heat it up to 750°C and keep it warm After 4 hours, after cooling with the furnace temperature, crystalline TiO with larger diameter gold particles loaded on the top can be directly prepared on the surface of the titanium substrate. 2 Nanowires.

example 3

[0025] Example 3: First, use magnetron sputtering for 20 seconds to coat gold on the surface of the ultrasonically cleaned Ti sheet, then place the gold-coated Ti sheet in a muffle furnace at a heating rate of 5°C / min, heat it up to 800°C and keep it warm After 6 hours, after cooling with the furnace temperature, the crystalline TiO with smaller diameter gold particles and longer length can be directly prepared on the surface of the titanium substrate. 2 Nanowires.

[0026] From the comparison of Examples 1 and 3, it can be seen that the length of the nanowires gradually increases with the increase of the holding temperature and the extension of the holding time. The average diameter of gold particles increases with the increase of magnetron sputtering time. The longer the sputtering time, the thicker the gold film on the surface, which affects the particle size. The sputtering time of Examples 1 and 3 is short, and the average particle diameter is small, while the sputtering...

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Abstract

The invention relates to preparation of a surface micro-nano functional structure and in particular relates to a method for preparing TiO2 nano-wires loaded with gold particles at top ends. The methodis characterized by comprising the following steps: firstly, putting Ti sheets into absolute ethyl alcohol and carrying out ultrasonic washing; then uniformly spraying gold on the surfaces of the washed Ti sheets through magnetron sputtering; then putting the Ti sheets sprayed with the gold into a muffle furnace and carrying out heat treatment; producing the crystallization type TiO2 nano-wires loaded with the gold particles at the top ends on the surfaces of the Ti sheets sprayed with the gold. The preparation method provided by the invention has the advantages of simple technology, controllable size, high light absorption rate, stable structure, capability of realizing large-scale production and the like; the prepared TiO2 nano-wires can be applied to fields including photocatalysis, surface-enhanced Raman scattering and surface-enhanced fluorescence, bacterium resistance and pollution prevention and, photoelectric conversion and the like.

Description

technical field [0001] The invention relates to the preparation of surface micro-nano functional structures, specifically a method for preparing TiO with gold particles loaded on the top 2 nanowire method. Background technique [0002] Titanium dioxide is widely used in the fields of photocatalysis, surface-enhanced Raman scattering and surface-enhanced fluorescence, antibacterial and antifouling, and photoelectric conversion because of its high chemical stability, non-toxicity, and low cost. [0003] Compared with other titanium dioxide micro-nano structures, titanium dioxide nanowires have a higher specific surface area, which is conducive to better and full contact with reactants and improves the efficiency of action, which has important practical significance. At present, there are methods for preparing titanium dioxide nanowires such as hydrothermal method and template method, but compared with the heat treatment method, they are time-consuming, easy to agglomerate, hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/16C23C14/35C23C8/10B82Y40/00B01J23/52
CPCB01J23/52B01J35/004B82Y40/00C23C8/10C23C14/16C23C14/35
Inventor 宋娟程永健
Owner JIANGSU UNIV
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