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Composite titanium dioxide photocatalyst and preparation method thereof

A titanium dioxide and photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of low production cost, mature technology and wide application range

Inactive Publication Date: 2011-12-28
刘凡新 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although using this method to obtain better results than traditional metal ion doping, but there are many defects

Method used

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  • Composite titanium dioxide photocatalyst and preparation method thereof
  • Composite titanium dioxide photocatalyst and preparation method thereof
  • Composite titanium dioxide photocatalyst and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0032] A silver nanocluster structure based on diamond-like film coating / TiO 2 The preparation method of type photocatalyst:

[0033] (1) A substrate with a silver cluster structure with an average particle diameter of 50 nanometers was prepared on a glass substrate by using an atomic cluster sputtering deposition method (refer to the method disclosed in Chinese patent CN101482528).

[0034] (2) Depositing a tetrahedral amorphous carbon film with a thickness of 1 nanometer on the substrate with a nano-silver cluster structure prepared in step (1) by using a filtered cathode vacuum arc method. The filtered cathode vacuum arc method is completed on the FCVA source system produced by Singapore Nanfeng Technology Pte Ltd (refer to the method disclosed in Chinese patent CN1235695A).

[0035] (3) using magnetron sputtering (with reference to the method described in Materials Research Bulletin 46,52 (2011)) to deposit on the nano-silver cluster structure substrate covered by the ult...

Embodiment 2

[0037] Except that the thickness of the tetrahedral amorphous carbon film deposited on the substrate of nano-silver cluster structure in step (2) is 1.5 nanometers, other steps are the same as in embodiment 1.

Embodiment 3

[0039] Except that the thickness of the tetrahedral amorphous carbon film deposited on the substrate of nano-silver cluster structure in step (2) is 2 nanometers, other steps are the same as in embodiment 1.

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Abstract

The invention provides a composite titanium dioxide photocatalyst, which consists of an inert metal micro-nano structure, a diamond-like film layer deposited on the inert metal micro-nano structure, and nano-titanium dioxide coated outside the diamond-like film layer, wherein The thickness of the diamond-like carbon film layer is 1-2 nanometers. In the present invention, the ultra-thin diamond-like film is coated on the inert metal micro-nano structure, and by preventing the photo-generated electrons of titanium dioxide from transferring to the metal, the surface plasmon effect of the metal micro-nano structure is stimulated to obtain a more pure metal micro-nano structure than the simple metal micro-nano structure. Strong enhanced electric field, thus greatly improving the photocatalytic efficiency of titanium dioxide, can be widely used in indoor pollutant removal, sterilization and degradation of organic dye pollutants.

Description

technical field [0001] The invention relates to a composite titanium dioxide photocatalyst, in particular to a diamond-like film-coated metal micro-nano structure / TiO 2 Type composite photocatalyst and preparation method thereof. Background technique [0002] Surface plasmon refers to the electromagnetic wave propagating along the metal surface generated by the interaction between free electrons and photons existing on the metal surface. Its propagation direction is along the metal / dielectric surface, and it decays exponentially in the direction perpendicular to the interface. In recent years, with the maturity of nanotechnology, metal micro-nano structures form a locally enhanced electromagnetic field due to the localization of light in the nanoscale space near the metal surface. Compared with the incident light field, the locally enhanced electromagnetic field intensity It can reach more than 100 times, and can significantly improve the efficiency of many optical processe...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 刘凡新刘宝升
Owner 刘凡新
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