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Preparation method of CeO2 nano-particle/TiO2 nano-tube array composite heterojunction film

A nanotube array and composite heterojunction technology, which is applied in the field of heterojunction film preparation, can solve the problems of unsuitable industrial production, uniformity and harsh conditions, and achieve low cost, simple method and repeatability Good results

Active Publication Date: 2018-06-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When preparing heterojunctions by electrodeposition, the growth of heterojunctions is closely related to the parameter conditions in each step, the conditions are harsh, and there are uniformity problems in mass production, which is not suitable for industrial production and preparation

Method used

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  • Preparation method of CeO2 nano-particle/TiO2 nano-tube array composite heterojunction film
  • Preparation method of CeO2 nano-particle/TiO2 nano-tube array composite heterojunction film

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preparation example Construction

[0027] a CeO 2 Nanoparticles / TiO 2 A method for preparing a nanotube array composite heterojunction film, comprising the following steps:

[0028] Step 1, preparing anatase-type TiO by anodic oxidation 2 nanotube arrays;

[0029] 1.1 Using fluoride as a solute, a mixture of alcohol solvent and deionized water with a volume ratio of 98:2 as a solvent, prepare an organic fluorine-containing electrolyte with a mass percentage of fluoride of 0.3wt% to 0.5wt%;

[0030] 1.2 Ultrasonic clean the metal titanium sheet in deionized water and absolute ethanol for 30-60 minutes, and dry it for later use;

[0031] 1.3 Use the metal titanium sheet cleaned in step 1.2 as the anode, place the platinum electrode in parallel with the titanium sheet as the cathode, and use the organic fluorine-containing electrolyte prepared in step 1.1 as the electrolyte, and prepare TiO by anodic oxidation. 2 Nanotube array; wherein, the anodic oxidation voltage is a DC voltage of 55-60V provided by a DC s...

Embodiment 1

[0039] a CeO 2 Nanoparticles / TiO 2 A method for preparing a nanotube array composite heterojunction film, comprising the following steps:

[0040] Step 1, preparing anatase-type TiO by anodic oxidation 2 nanotube arrays;

[0041] 1.1 Using ammonium fluoride as a solute, a mixture of ethylene glycol and deionized water with a volume ratio of 98:2 as a solvent, prepare an organic fluorine-containing electrolyte with a mass percentage of ammonium fluoride of 0.3 wt %;

[0042] 1.2 Ultrasonic clean the metal titanium sheet in deionized water and absolute ethanol for 30 minutes, and dry it for later use;

[0043] 1.3 Use the metal titanium sheet cleaned in step 1.2 as the anode, the platinum electrode and the titanium sheet are placed in parallel as the cathode, and the organic fluorine-containing electrolyte prepared in step 1.1 is used as the electrolyte, and TiO is prepared on the surface of the metal titanium sheet by anodic oxidation. 2 Nanotube array; wherein, the anodic ...

Embodiment 2

[0049] Compared with Example 1, the difference between Example 2 and Example 1 is that in step 2, 5 mmol of cerium nitrate was added to 50 mL of deionized water, and mixed thoroughly to obtain a cerium nitrate precursor solution; the rest of the steps were the same as in Example 1.

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Abstract

The invention discloses a preparation method of a CeO2 nano-particle / TiO2 nano-tube array composite heterojunction film, and belongs to the technical field of preparation of the composite heterojunction film. The preparation method comprises the following steps: firstly, preparing highly-ordered densely-arranged titanium dioxide nanotube arrays by adopting an electrochemical anodic oxidation process; then enabling cerium salt precursor liquid to flow into the nanotube arrays by means of soaking; and finally, heating and decomposing cerium salt into CeO2 particles through heat treatment and adhering the CeO2 particles to tube walls of TiO2 nanotubes so as to obtain the composite heterojunction film being in a good shape. The method has the advantages of simpleness and convenience in operation, low cost and good repeatability; and moreover, realization of large-scale industrial production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of preparation of heterojunction thin films, in particular to a CeO 2 Nanoparticles / TiO 2 A method for preparing a nanotube array composite heterojunction thin film. Background technique [0002] TiO 2 It is a wide bandgap semiconductor with a bandgap width of about 3.2eV. It has excellent physical and chemical stability and has been widely used and researched in many aspects. For example, photocatalysis, solar cells, lithium-ion batteries, gas sensors, hydrogen production from water splitting, etc. CeO 2 It is a typical functional rare earth oxide, which has a wide range of applications in the fields of catalysts, luminescent materials, electronic ceramics, ultraviolet absorbing materials and exhaust gas absorbers. If TiO 2 with CeO 2 Composite to form a composite heterojunction thin film with excellent properties, which has great research value. [0003] At present, composite heterojunction thin fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C23C18/12B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C23C18/1216C23C18/1245C25D11/26
Inventor 廖宇龙袁博韬李元勋廖斌刘成李亚菲张怀武
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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