A kind of composite titanium dioxide nanotube array photocatalyst and preparation method thereof

A nanotube array, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, general water supply saving, etc., can solve the problems of high recombination rate, low photocatalytic efficiency, low solar energy utilization rate, etc., and achieve low cost. , Increase the specific surface area and solve the inconvenient effect of recycling

Inactive Publication Date: 2014-10-15
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As we all know, the recombination rate of photogenerated electrons and holes in the intrinsic state of titanium dioxide is high, resulting in low photocatalytic efficiency, and can only absorb ultraviolet light (below 400nm), and the solar energy utilization rate is low.

Method used

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  • A kind of composite titanium dioxide nanotube array photocatalyst and preparation method thereof
  • A kind of composite titanium dioxide nanotube array photocatalyst and preparation method thereof
  • A kind of composite titanium dioxide nanotube array photocatalyst and preparation method thereof

Examples

Experimental program
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Embodiment Construction

[0021] The following examples are intended to illustrate the present invention without further limiting the invention.

[0022] (l) Fabrication of titania nanotube arrays

[0023] ① Grind the surface of the base material titanium sheet, clean it and set aside;

[0024] ② Preparation of inorganic electrolyte: the electrolyte is composed of 0.1M NaF and 0.5M NaHSO 4 The composition of the aqueous solution;

[0025] ③Under the condition of 15V DC voltage, using pure titanium sheet as the anode and platinum sheet as the cathode, the titanium dioxide nanotube array is electrolyzed in the electrolyte;

[0026] ④The titania nanotube array prepared above was calcined under aerobic conditions at 500°C for 3 hours to crystallize it into a titania nanotube array. see figure 1 .

[0027] (2) Preparation of graphene oxide dispersion

[0028] Graphite oxide prepared by the Hummers oxidation method was ultrasonically dispersed in absolute ethanol to obtain a graphene oxide solution wit...

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Abstract

The invention relates to a compound titanium dioxide nanotube array photocatalyst, a preparation and an application thereof. An outer surface of a titanium dioxide nanotube array is decorated by a layer of graphene and titanium dioxide nano-particle compound porous film. The compound titanium dioxide nanotube array photocatalyst provided by the invention can be applied to the treatment for organic waste water. The compound titanium dioxide nanotube array photocatalyst especially has an excellent treating effect for the photocatalysis treatment of organic pollutants in the organic waste water by utilizing solar ultraviolet visible light.

Description

technical field [0001] The invention relates to a composite titanium dioxide nanotube array photocatalyst which can be used for organic waste water treatment and its preparation and application. Background technique [0002] Titanium dioxide has become the most promising semiconductor photocatalyst due to its stable chemical properties, non-toxicity, low cost and high catalytic activity. As we all know, the recombination rate of photogenerated electrons and holes in the intrinsic state of titanium dioxide is high, resulting in low photocatalytic efficiency, and can only absorb ultraviolet light (below 400nm), and the utilization rate of solar energy is low. Contents of the invention [0003] The object of the present invention is to provide a composite titanium dioxide nanotube array photocatalyst which has not been successfully synthesized in the prior art and has a special structure. [0004] Another object of the present invention is to provide a low-cost, fast and gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J21/06C02F1/30C02F1/32C02F101/36
CPCY02A20/212Y02W10/37
Inventor 刘承斌罗胜联王博古唐艳红韦振栋徐翔丽
Owner HUNAN UNIV
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