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Titanium-based lead dioxide anode with intermediate layer made of modified TiO2 nanotube arrays, preparation method and applications thereof

A nanotube array, lead dioxide technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of easy detachment, low electrocatalytic efficiency, and unreliable coating, to increase the degree of bonding, strong Electrochemical oxidation ability, low equipment requirements

Active Publication Date: 2015-03-11
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But Ti / PbO 2 During the use of the electrode, the plating layer is not reliable, easy to fall off, and the electrocatalytic efficiency is not high.

Method used

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  • Titanium-based lead dioxide anode with intermediate layer made of modified TiO2 nanotube arrays, preparation method and applications thereof
  • Titanium-based lead dioxide anode with intermediate layer made of modified TiO2 nanotube arrays, preparation method and applications thereof
  • Titanium-based lead dioxide anode with intermediate layer made of modified TiO2 nanotube arrays, preparation method and applications thereof

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Experimental program
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Embodiment 1

[0031] One of the present embodiment to modify TiO 2 A method for preparing a titanium-based lead dioxide anode with a nanotube array as an intermediate layer. The specific preparation steps are as follows:

[0032] (1) Take a rectangular Ti plate with a size of 30mm×20mm and a thickness of 0.8mm. Polish it step by step with 180-mesh, 360-mesh, and 500-mesh sandpaper until smooth, wash it with deionized water, acetone, and methanol for 15 minutes, and then use Wash with ultrapure water for 3 times, then place the Ti plate in 50mL mixed acid solution (HF:HNO 3 :H 2 O, 1:4:5, V:V:V) etch for 10 min, and then clean the etched Ti plate with ultrapure water;

[0033] (2) Preparation of TiO by anodic oxidation 2 -NTs electrode: place the volume ratio HF: acetic acid: H with the titanium plate pretreated through step (1) as the anode and cathode 2 In the solution with O ratio of 0.04:1:8, the distance between cathode and anode is 1.0cm, the constant voltage is 40V, and the reaction...

Embodiment 2

[0039] A kind of Ag in this embodiment 2 O modified TiO 2 A method for preparing a titanium-based lead dioxide anode with a nanotube array as an intermediate layer. The specific preparation steps are as follows:

[0040] (1) Take a rectangular Ti plate with a size of 30mm×20mm and a thickness of 0.8mm. Polish it step by step with 180-mesh, 360-mesh, and 500-mesh sandpaper until smooth, wash it with deionized water, acetone, and methanol for 15 minutes, and then use Wash with ultrapure water for 3 times, then place the Ti plate in 50mL mixed acid solution (HF:HNO 3 :H 2 O, 1:4:5, V:V:V) etch for 10 min, and then clean the etched Ti plate with ultrapure water;

[0041] (2) Preparation of TiO by anodic oxidation 2 -NTs electrode: place the volume ratio HF: acetic acid: H with the titanium plate pretreated through step (1) as the anode and cathode 2 In the solution with O ratio of 0.04:1:8, the distance between cathode and anode is 1.5cm, the constant voltage is 60V, and the ...

Embodiment 3

[0046] One of the present embodiment to modify TiO 2 A method for preparing a titanium-based lead dioxide anode with a nanotube array as an intermediate layer. The specific preparation steps are as follows:

[0047] (1) Take a rectangular Ti plate with a size of 30mm×20mm and a thickness of 0.8mm. Polish it step by step with 180-mesh, 360-mesh, and 500-mesh sandpaper until smooth, wash it with deionized water, acetone, and methanol for 15 minutes, and then use Wash with ultrapure water for 3 times, then place the Ti plate in 50mL mixed acid solution (HF:HNO 3 :H 2 O, 1:4:5, V:V:V) etch for 10 min, and then clean the etched Ti plate with ultrapure water;

[0048] (2) Preparation of TiO by anodic oxidation 2 -NTs electrode: place the volume ratio HF: acetic acid: H with the titanium plate pretreated through step (1) as the anode and cathode 2 In a solution with O ratio of 0.04:1:8, the distance between cathode and anode is 1cm, the constant voltage is 20V, and the reaction tim...

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Abstract

The invention belongs to the technical field of electrode materials, and specifically relates to a titanium-based lead dioxide anode with an intermediate layer made of modified TiO2 nanotube arrays, a preparation method and applications thereof. The anode preparation method comprises the following steps: pre-treating a titanium plate, performing anode oxidation and calcination to obtain a Ti / TiO2 nanotube array electrode, carrying out electric deposition in an AgNO3 solution to obtain a Ti / TiO2-NTs / Ag electrode, carrying out anode oxidation to obtain a Ti / TiO2-NTs / Ag2O electrode, and finally performing electrochemical deposition in an electrolyte solution containing Pb(NO3)2, HNO3, and NaF to obtain a Ti / TiO2-NTs / Ag2O / PbO2 anode. Through preparing an Ag2O layer between titanium dioxide nanotubes and PbO2, the oxygen evolution potential, service life, and electrochemical oxidizing performance of the electrode are all improved.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, in particular to a 2 O modified TiO 2 Titanium-based lead dioxide anode with nanotube array as the middle layer, its preparation method and application. Background technique [0002] The lead dioxide electrode has the characteristics of high oxygen evolution potential, excellent electrochemical performance, corrosion resistance, and low price, and has been valued by metallurgy, environmental protection, and chemical industries. After the research of relevant people, it was found that the lead dioxide electrode is a high-efficiency electrode material for dealing with refractory organic pollutants. [0003] Lead dioxide has low mechanical strength and is difficult to process and form. It is generally deposited on a titanium plate with high mechanical strength and a thermal expansion coefficient similar to that of lead dioxide to form Ti / PbO 2 electrode. But Ti / PbO 2 During the use ...

Claims

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Application Information

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IPC IPC(8): C25B11/10C25B11/02C02F1/461B82Y30/00B82Y40/00
Inventor 卓琼芳许振成罗梅清虢清伟王振兴易皓王丽
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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