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S/Ti<3+> dual-doped TiO2 nanotube array preparation method

A nanotube array, double-doping technology, applied in nanotechnology, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of weak response to visible light, easy recombination of photogenerated electrons and holes, and achieve high response to visible light. The effect of improving capacity, low comprehensive cost and easy control

Inactive Publication Date: 2017-05-31
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But pristine TiO 2 Semiconductors do not respond strongly to visible light, and photogenerated electrons-holes are easy to recombine, which is limited in production and use, so its modification is the key to expanding its scope of application

Method used

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  • S/Ti&lt;3+&gt; dual-doped TiO2 nanotube array preparation method
  • S/Ti&lt;3+&gt; dual-doped TiO2 nanotube array preparation method
  • S/Ti&lt;3+&gt; dual-doped TiO2 nanotube array preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of TiO 2 nanotube array

[0032] Use 600#, 800#, 1000# metallographic sandpaper of different specifications to polish the surface of the titanium sheet in turn. The size of the titanium sheet is 1x2cm 2 , using HF:HNO with a volume ratio of 1:4:5 3 :H 2 The mixed solution of O carries out chemical polishing to described titanium sheet, and after chemical polishing is finished, titanium sheet is carried out ultrasonic cleaning with deionized water, acetone, dehydrated alcohol successively, and drying standby, finishes the pretreatment to titanium sheet; Put into the NH of 0.5:0.5:99 in the mass fraction ratio (wt%) of the titanium sheet that passes 4 F, H 2 In the electrolyte composed of O and ethylene glycol, the titanium sheet was anodized at a voltage of 50V for 6h.

[0033] (2) soaking treatment

[0034] Pure TiO after anodic oxidation 2 The nanotube arrays were soaked in 30g / L thiourea solution for different periods of time. During the soaking...

Embodiment 2

[0038] (1) Preparation of TiO 2 nanotube array

[0039] Use 600#, 800#, 1000# metallographic sandpaper of different specifications to polish the surface of the titanium sheet in turn. The size of the titanium sheet is 1.5x3cm 2 , using HF:HNO with a volume ratio of 1:4:5 3 :H 2The mixed solution of O chemically polishes the titanium sheet, and then ultrasonically cleans the titanium sheet with deionized water, acetone, and absolute ethanol in sequence, and then dries for use to complete the pretreatment of the titanium sheet; put the pretreated titanium sheet into a mass NH with a part ratio (wt%) of 0.5:0.5:99 4 F, H 2 In the electrolyte composed of O and ethylene glycol, the titanium sheet was anodized at a voltage of 50V for 6h.

[0040] (2) soaking treatment

[0041] Pure TiO after anodic oxidation 2 The nanotube arrays were soaked in 60g / L thiourea solution for different periods of time. During the soaking process, ultrasonic treatment was performed for 60s every 1...

Embodiment 3

[0045] (1) Preparation of TiO 2 nanotube array

[0046] Use 600#, 800#, 1000# metallographic sandpaper of different specifications to polish the surface of the titanium sheet in turn. The size of the titanium sheet is 2x4cm 2 Use HF:HNO with a volume ratio of 1:4:5 3 :H 2 The titanium sheet is chemically polished with a mixed solution of O, and then ultrasonically cleaned with deionized water, acetone, and absolute ethanol in sequence, and dried for later use. Put the pretreated titanium sheet into NH 4 F, H 2 Composed of O and ethylene glycol, the mass fraction ratio (wt %) is 0.5:0.5:99 in an electrolyte solution with a voltage of 50V for 6h.

[0047] (2) soaking treatment

[0048] Pure TiO after anodic oxidation 2 The nanotube arrays were soaked in 90g / L thiourea solution for different periods of time. During the soaking process, they were ultrasonically treated for 30s at intervals of 1h, and cycled sequentially for a total of 12h.

[0049] (3) heat treatment

[0...

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Abstract

The invention discloses an S / Ti<3+> dual-doped TiO2 nanotube array preparation method which comprises the following steps: (1) TiO2 nanotube array preparation: preprocessing a titanium sheet, putting the preprocessed titanium sheet into electrolyte and utilizing 50V voltage to anodize the titanium sheet for 6h, wherein the electrolyte is prepared from NH4F, H2O and glycol according to mass fraction (wt%) of 0.5 to 0.5 to 99; (2) soaking treatment: putting the pure TiO2 nanotube array which is anodized into thiourea solutions with different concentrations to be soaked for different time; (3) heat treatment: thermally treating the soaked TiO2 nanotube array for 2h at 400 to 500 DEG C and finally cooling to room temperature to obtain a modified TiO2 nanotube array finished product.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalyst materials, in particular to a S / Ti 3+ Double-doped TiO 2 Preparation method of nanotube arrays. Background technique [0002] With the development of science and technology, water pollution is becoming more and more serious. A large amount of urban sewage is randomly discharged into rivers and lakes, which deteriorates the water quality, and the quality of drinking water continues to decline, directly endangering human health and the reproduction of animals and plants. Water pollution affects industrial production, increases equipment corrosion, affects product quality, and even makes production impossible. Water pollution also affects people's lives, destroys ecology, and directly endangers people's health, causing great damage. Therefore, strengthening water pollution control is conducive to creating a comfortable, safe and green living environment, so as to realize the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C25D11/26B82Y40/00
CPCC25D11/26B82Y40/00B01J21/063B01J35/39
Inventor 雅菁项立云
Owner TIANJIN CHENGJIAN UNIV
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