Method for electrochemically depositing silver nanoparticles in titanium dioxide nanotube array

A technology of nanotube arrays and silver nanoparticles, which is applied in the field of photocatalytic material synthesis, can solve problems such as the inability to deposit Ag nanoparticles, and achieve the effect of simple operation and excellent photocatalytic reduction of CO2 activity

Active Publication Date: 2016-05-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that Ag nanoparticles cannot be deposited on TiO by existing deposition methods. 2 Problems in nanotubes, providing a facile method for depositing silver nanoparticles in titania nanotube arrays

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  • Method for electrochemically depositing silver nanoparticles in titanium dioxide nanotube array
  • Method for electrochemically depositing silver nanoparticles in titanium dioxide nanotube array
  • Method for electrochemically depositing silver nanoparticles in titanium dioxide nanotube array

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Embodiment 1

[0045] The steps of the preparation method of electrochemically depositing silver nanoparticles in the titanium dioxide nanotube array are as follows:

[0046] a) Titanium sheet surface removal treatment: Soak the titanium sheet in concentrated sulfuric acid for 6 hours, then clean it with deionized water, smooth the surface of the titanium sheet with sandpaper, and then put the titanium sheet into water: nitric acid according to the volume ratio : Soak in the polishing solution made of hydrofluoric acid = 6:3:1 for 5 minutes, ultrasonically clean with ethanol solution, and dry for use;

[0047] b) Preparation of TiO on the surface of titanium sheet 2 Nanotube array: the titanium sheet treated in step a) is used as anode and cathode. Among them, the length of the anode is 6cm, the width is 5.5cm, and the thickness is 0.25mm; the length of the cathode is 6cm, the width is 6.5cm, and the thickness is 0.25mm. The distance between the anode and cathode was 4 cm. The anode and c...

Embodiment 2

[0070] The steps of the preparation method of electrochemically depositing silver nanoparticles in the titanium dioxide nanotube array are as follows:

[0071] a) Impurity removal treatment on the surface of the titanium sheet: Soak the titanium sheet in a mixed solution of 15vt% acetone, 20vt% ethanol and 65vt% deionized water for 6 hours, then clean it with deionized water, and polish the surface of the titanium sheet with sandpaper Smooth, then put the titanium sheet into the polishing solution prepared by volume ratio of water: nitric acid: hydrofluoric acid = 6:3:1, soak for 5 minutes, ultrasonically clean with ethanol solution, dry and set aside;

[0072] b) Preparation of TiO on the surface of titanium sheet 2 Nanotube array: the titanium sheet treated in step a) is used as anode and cathode. The anode is 6cm long, 5.5cm wide, and 0.25mm thick; the cathode is 6cm long, 6.5cm wide, and 0.25mm thick. The distance between the anode and cathode was 3 cm. The anode and th...

Embodiment 3

[0078] The steps of the preparation method of electrochemically depositing nano-silver particles in the titanium dioxide nanotube array are as follows:

[0079] a) Titanium sheet surface removal treatment: Soak the titanium sheet in concentrated sulfuric acid for 6 hours, then clean it with deionized water, smooth the surface of the titanium sheet with sandpaper, and then put the titanium sheet into water: nitric acid according to the volume ratio : Soak in the polishing solution made of hydrofluoric acid = 6:3:1 for 5 minutes, ultrasonically clean with ethanol solution, and dry for use;

[0080] b) Preparation of TiO on the surface of titanium sheet 2 Nanotube array: the titanium sheet treated in step a) is used as anode and cathode. Among them, the length of the anode is 6cm, the width is 5.5cm, and the thickness is 0.25mm; the length of the cathode is 6cm, the width is 6.5cm, and the thickness is 0.25mm. The distance between the anode and cathode was 5 cm. The anode and ...

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Abstract

The invention relates to a method for electrochemically depositing silver nanoparticles in a titanium dioxide nanotube array. The method comprises the following steps: (a) titanium sheet pretreatment: removing oil stain and impurities on the surface of a titanium sheet, burnishing the surface of the titanium sheet, carrying out polishing treatment, cleaning, and drying for later use; (b) preparing a TiO2 nanotube array on the surface of the titanium sheet by virtue of an anodic oxidation method; (c) deposition of silver nanoparticles: cleaning the titanium sheet on which the titanium dioxide nanotube array is formed on the surface for removing the impurities, then dipping the titanium sheet into mixed liquid of Ag ion-containing ethanol and water, connecting the titanium sheet to a cathode of a power supply, applying a voltage between the titanium sheet processed in the step (a) as an anode and the cathode, and electrochemically depositing silver; and (d) sample treatment: cleaning the sample prepared in the step (c), drying, and calcining. By virtue of the method, Ag nanoparticles can be deposited into a nanotube, so that the SPR effect of the silver nanoparticles can be effectively enhanced, and the photocatalytic performance of the TiO2 nanotube array can be further improved.

Description

technical field [0001] The invention relates to the technical field of synthesis of photocatalytic materials, in particular to a method for electrochemically depositing silver nanoparticles in a titanium dioxide nanotube array. Background technique [0002] With the rapid development of industry, the human demand for energy is increasing day by day. Fossil fuels account for 80% of the energy consumed. Human society's excessive dependence on fossil energy has also caused a serious problem - the greenhouse effect. Therefore, in order to realize the sustainable development of society, finding clean alternative energy sources and alleviating and improving the greenhouse effect have become the primary tasks of today's society. [0003] Therefore, researchers thought of using photocatalytic reduction of CO 2 The method will CO 2 into methane (CH 4 ), Methanol (CH 4 O), formic acid (HCOOH) and other high-value organic fuels. This method can solve the problems of energy short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D3/46B01J23/50B01J35/02
CPCB01J23/50B01J35/004C25D3/46C25D11/26
Inventor 余家国刘敬祥黄淑颖
Owner WUHAN UNIV OF TECH
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