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Gold nano particle-titanium dioxide nano wire array composite material as well as preparation method and application thereof

A gold nanoparticle and nanowire array technology, which is applied in the field of gold nanoparticle-titanium dioxide nanowire array composite material and its preparation, can solve the problems of photogenerated electron-hole short lifetime and low quantum efficiency, and achieve high photoelectric conversion efficiency , The production process is simple, and the effect of improving the absorption efficiency

Inactive Publication Date: 2014-10-01
FUDAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, titanium dioxide is a wide-bandgap semiconductor (band gap of 3.2 eV), which mainly absorbs ultraviolet light. In addition, it also has the disadvantages of short lifetime of photogenerated electron-hole pairs and low quantum efficiency of photocatalytic process.

Method used

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  • Gold nano particle-titanium dioxide nano wire array composite material as well as preparation method and application thereof
  • Gold nano particle-titanium dioxide nano wire array composite material as well as preparation method and application thereof
  • Gold nano particle-titanium dioxide nano wire array composite material as well as preparation method and application thereof

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Embodiment Construction

[0024] Below, the present invention will be further described by the following examples, which will help to understand the present invention, but do not limit the content of the present invention.

[0025] First, put the FTO glass in a 50 ml reaction kettle with the face down, mix 15 ml of water with 13 ml of concentrated hydrochloric acid, and then add 0.25 ml of tetra-n-butyl titanate solution into it. Stir the solution for 5-10 minutes, mix well, pour it into the reaction kettle, and react at 150°C for 12 hours. After the reaction, the substrate was taken out, washed and dried. Next, place the substrate in a tube furnace at 450°C for 2 hours and then soak the sample in a 0.01 M chloroauric acid solution with a pH of 4.5 for 5 hours, then take it out and fully soak it with deionized water. Baking at 300°C for 2 hours in air. After taking out the sample, soak it overnight in 2% stearyl mercaptan in toluene solution, then take it out once and rinse it with toluene and ethano...

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Abstract

The invention belongs to the technical field of photoelectrochemical sensors, and in particular relates to a gold nano particle-titanium dioxide nano wire array composite material as well as a preparation method and application thereof. The preparation method comprises the steps of adjusting the hydrolysis reaction rate through concentrated hydrochloric acid, wherien tetra-n-butyl titanate is taken as a titanium source and water is taken as a solvent under a hydrothermal system, and growing a titanium dioxide nano wire array on an FTO conductive glass-containing substrate; immersing the titanium dioxide nano wire array in a chloroauric acid solution, and heating and roasting the titanium dioxide nano wire array in air to obtain a gold nano particle-titanium dioxide nano wire composite structure; and performing chemical group and specific acceptor modification on the surfaces of gold nano particles to obtain the gold nano particle-titanium dioxide nano wire composite material. The composite material can be used for performing high-sensitivity bacterial toxin detection. The prepared photoelectrochemical sensor is low in cost, high in stability, high in photoelectric conversion efficiency and suitable for large-area production.

Description

technical field [0001] The invention belongs to the technical field of photoelectrochemical sensors, and in particular relates to a gold nanoparticle-titanium dioxide nanowire array composite material and its preparation method and application. Background technique [0002] Highly sensitive detection of chemical substances and biomolecules is of great significance in biomedicine, early disease diagnosis, rapid drug screening and biosafety. The key to high-sensitivity detection lies in the specific identification of the molecule to be tested and the establishment of an effective signal generation and transformation system. In recent years, in order to realize rapid, high-sensitivity, large-scale and low-cost biochemical detection, many optical, electrical and mechanical detection and analysis methods have been greatly developed. Among these methods of analysis and detection, the photoelectrochemical sensor represents a unique signal transduction mode, which combines photoele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 郑耿锋达佩玫
Owner FUDAN UNIV
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