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Preparation of cupric oxide doped with titanium dioxide gradient film

A technology of titanium dioxide and copper oxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of harsh preparation process requirements, lower photoelectric conversion efficiency, and limit solar energy utilization, so as to achieve unique technology, improve photoelectrochemical stability, Realize the effect of photoelectric characteristics

Inactive Publication Date: 2010-08-25
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 There are also some defects in practical application: (1) TiO 2 Light absorption is only limited to the ultraviolet region with a shorter wavelength, and the absorption of sunlight is less than 5% of the solar spectrum irradiated on the ground, which limits the utilization of solar energy; (2) photogenerated carriers (h+, e- ) is easy to recombine, reducing the photoelectric conversion efficiency, thereby affecting the efficiency of photocatalysis
Zhao et al. (Thin SolidFilms.1999, 340, 125) studied the semiconductor oxide Ti 1-x V x o 2 The optoelectronic properties of solid solution thin films, although VO 2 The forbidden band width is small (0.62eV), however, VO 2 It is a metastable crystal phase, which has strict requirements on the preparation process and is not conducive to large-scale industrial production

Method used

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  • Preparation of cupric oxide doped with titanium dioxide gradient film
  • Preparation of cupric oxide doped with titanium dioxide gradient film
  • Preparation of cupric oxide doped with titanium dioxide gradient film

Examples

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Embodiment 1

[0020] Preparation of gradient thin films on copper oxide doped titania. The specific preparation process is as follows: dissolve 17ml of butyl titanate in 68ml of absolute ethanol, then add 4.8ml of diethanolamine, and stir on a constant temperature magnetic stirrer at room temperature for 30min to obtain solution A; take 0.213g of chlorinated Dissolve copper in 20ml of absolute ethanol, add solution A, stir magnetically for 60min to obtain solution B; then add solution B mixed solution of deionized water 0.9ml and absolute ethanol 9ml, stir magnetically for 60min to obtain a Cu / Ti molar ratio of 2.5% of Sol. According to the same experimental conditions, sols with Cu / Ti molar ratios of 5%, 7.5%, 10%, 12.5% ​​and 15% were synthesized respectively. In order to obtain a clean substrate, the substrate was soaked in potassium dichromate lotion for 10 hours, then ultrasonically washed with absolute ethanol for 15 minutes and rinsed with deionized water, and dried at 80°C for late...

Embodiment 2

[0022]Preparation of gradient thin films on copper oxide doped titania. The specific preparation process is as follows: dissolve 17ml of butyl titanate in 68ml of absolute ethanol, then add 4.8ml of diethanolamine, and stir on a constant temperature magnetic stirrer at room temperature for 30min to obtain solution A; take 0.425g of chlorinated Dissolve copper in 20ml of absolute ethanol, add solution A, stir magnetically for 60min to obtain solution B; then add solution B mixed solution of deionized water 0.9ml and absolute ethanol 9ml, stir magnetically for 60min to obtain 5% Cu / Ti molar ratio of Sol. According to the same experimental conditions, sols with Cu / Ti molar ratios of 0, 1%, 2%, 3% and 4% were synthesized respectively. In order to obtain a clean substrate, the substrate was soaked in potassium dichromate lotion for 10 hours, then ultrasonically washed with absolute ethanol for 15 minutes and rinsed with deionized water, and dried at 80°C for later use. Utilize ab...

Embodiment 3

[0024] Preparation of Gradient Thin Films Under Copper Oxide Doping TiO2. The specific preparation process is as follows: dissolve 17ml of butyl titanate in 68ml of absolute ethanol, then add 4.8ml of diethanolamine, and stir on a constant temperature magnetic stirrer at room temperature for 30min to obtain solution A; take 0.213g of chlorinated Dissolve copper in 20ml of absolute ethanol, add solution A, stir magnetically for 60min to obtain solution B; then add solution B mixed solution of deionized water 0.9ml and absolute ethanol 9ml, stir magnetically for 60min to obtain a Cu / Ti molar ratio of 2.5% of Sol. According to the same experimental conditions, sols with Cu / Ti molar ratios of 5%, 7.5%, 10%, 12.5% ​​and 15% were synthesized respectively. In order to obtain a clean substrate, the substrate was soaked in potassium dichromate lotion for 10 hours, then ultrasonically washed with absolute ethanol for 15 minutes and rinsed with deionized water, and dried at 80°C for lat...

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Abstract

The invention discloses a process for preparing a cupric oxide doping titanium dioxide gradient film, which is characterized in that the process includes the following steps of: 1) preparing sols with different Cu / Ti mole ratios; and 2) preparing the cupric oxide doping titanium dioxide gradient film; and the invention adopts the sol-gel technique to prepare the cupric oxide doping TiO2 gradient film which changes the Cu / Ti molar percentages in the film thickness direction continuously, and has advantages of unique technique and convenient operation and is easy in mass industrial production, meanwhile, the content of doped chemical can be controlled easily, thereby facilitating the adjustment to photoelectricity, photocatalysis and hydrophile properties of the TiO2 film. The invention canextend the photoresponse range of the TiO2 film and improve the photoelectric properties thereof in the visible light range; and can realize the continuous changing of film features without potentialbarrier of mutation, therefore, the photo-induced carriers are effectively separated and the photoelectrochemistry stability is improved.

Description

technical field [0001] The invention belongs to the field of preparation and application of semiconductor metal oxide thin films, and relates to the preparation of doped titanium dioxide thin films, in particular to a preparation method of copper oxide doped titanium dioxide gradient thin films. Background technique [0002] Titanium dioxide (TiO 2 ) is a new type of inorganic functional material, which exhibits physical and chemical properties such as excellent photocatalytic activity, photoelectric properties, thermal conductivity and chemical stability, and is widely used in solar cells, catalysts, sensors, cosmetics, functional ceramics, paints Coating and biomedicine and other fields. With people's interest in TiO 2 With the continuous deepening of understanding, its application has also been continuously expanded. But TiO 2 There are also some defects in practical application: (1) TiO 2 Light absorption is only limited to the ultraviolet region with a shorter wave...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23C04B41/85C01G23/047C04B41/50
Inventor 杨华明张向超唐爱东
Owner CENT SOUTH UNIV
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