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Titanium dioxide (TiO2) nanotube composite material and method for depositing SnSe/Ag nanoparticles

A technology of titanium dioxide and nanoparticles, applied in the field of nanomaterials, can solve the problems of different sizes of nanoparticles, expensive metals, and uneven distribution, and achieve high electrocatalytic efficiency, shortened reaction time, and simple operation

Inactive Publication Date: 2012-07-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the forbidden band width of titanium dioxide is wider, can only utilize the ultraviolet light part in sunlight, and ultraviolet light only accounts for 4% of the total energy of sunlight, how to reduce its forbidden band width, make it can utilize the visible light part in sunlight ( Accounting for 43% of the total energy of solar energy), it is the key to improving its photocatalytic and photoelectric conversion rate
At present, in order to further improve the TiO 2 The catalytic efficiency of nanotubes, the researchers used the self-doping method in TiO 2 The surface of nanotubes is doped with various noble metals, such as: Pd, Pt, Au, Rt, etc. However, these metals are expensive and difficult to promote on an industrial scale
There are also scholars who have taken TiO 2 Nanotube surface doped with two kinds of nanoparticles for TiO 2 Ternary composite of nanotubes, such as Pt / Au / TiO 2 -NTs, Pt / Ru / TiO 2 -NTs, CdS / PtTiO 2 -NTs, CdS / CdSe / TiO 2 -NTs, etc. However, the nanoparticles deposited on the nanotubes are of different sizes, uneven distribution, and poor adhesion

Method used

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  • Titanium dioxide (TiO2) nanotube composite material and method for depositing SnSe/Ag nanoparticles
  • Titanium dioxide (TiO2) nanotube composite material and method for depositing SnSe/Ag nanoparticles
  • Titanium dioxide (TiO2) nanotube composite material and method for depositing SnSe/Ag nanoparticles

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Effect test

Embodiment 1

[0030] Use 800#, 1000#, 2000#, and 2500# sandpaper to polish the surface of the pure Ti sheet until smooth, then clean it with deionized water, ultrasonically dry it with absolute ethanol for 5 minutes, and then dry it for later use

[0031] Titanium dioxide nanotubes were prepared by using a two-electrode system: the anode is a pure titanium sheet, and the cathode is a platinum sheet; in the electrolyte, the volume ratio of glycerol and water is 1, NH 4 The concentration of F is 0.3mol / L, the constant voltage is 30V, and the voltage is applied for 3 hours, that is, the self-assembled TiO is prepared by anodic oxidation. 2 nanotube

[0032] Will prepare self-assembled TiO 2 Electrochemical deposition of SnSe nanoparticles from pure titanium nanotubes: the TiO to be doped 2 The nanotubes were placed in an electrochemical deposition solution in which SnCl 2 .2H 2 O concentration is 0.05mol / L, SeO 2 Concentration 0.002mol / L, Na 2 CO 3 The concentration is 0.002mol / L, the c...

Embodiment 2

[0035] The surface of the Ti-Zr alloy sheet (the atomic molar ratio of Ti and Zr is 7:3) was polished to smooth with 800#, 1000#, 2000#, 2500# sandpaper respectively, and then cleaned with deionized water and ultrasonically Dry after 10min

[0036] Titanium dioxide nanotubes were prepared by using a two-electrode system: the anode is a titanium alloy sheet, and the cathode is graphite; in the electrolyte, the volume ratio of glycerol and water is 3, NH 4 The concentration of F is 0.5mol / L, the constant voltage is 60V, and the time of applying voltage is 10min, that is, the self-assembled TiO is prepared by anodic oxidation method. 2 nanotube

[0037] Will prepare self-assembled TiO 2 Electrochemical deposition of SnSe nanoparticles on titanium alloy sheets of nanotubes: TiO to be doped 2 The nanotubes were placed in an electrochemical deposition solution in which SnCl 2 .2H 2 O concentration is 0.06mol / L, SeO 2 Concentration 0.0025mol / L, Na 2 CO 3 The concentration is ...

Embodiment 3

[0040] The surface of the Ti-Zr alloy sheet (the atomic molar ratio of Ti and Zr is 8:2) was polished to smooth with 800#, 1000#, 2000#, 2500# sandpaper respectively, and then cleaned with deionized water and ultrasonically Dry after 10min

[0041] A two-electrode system was used to prepare titanium dioxide nanotubes: the anode was a titanium alloy sheet, and the cathode was graphite; in the electrolyte, the volume ratio of glycerol to water was 0.4, and NH 4 The concentration of F is 0.1mol / L, the constant voltage is 10V, and the voltage is applied for 4 hours, that is, the self-assembled TiO is prepared by anodic oxidation. 2 nanotube

[0042] Will prepare self-assembled TiO 2 Electrochemical deposition of SnSe nanoparticles on titanium alloy sheets of nanotubes: TiO to be doped 2 The nanotubes were placed in an electrochemical deposition solution in which SnCl 2 .2H 2 O concentration is 0.045mol / L, SeO 2 Concentration 0.0015mol / L, Na 2 CO 3 The concentration is 0.00...

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Abstract

The invention discloses a titanium dioxide (TiO2) nanotube composite material and a method for depositing SnSe / Ag nanoparticles. The method comprises the following steps of: firstly, preparing TiO2 nanotubes by using a two-electrode system; secondly, electrochemically depositing SnSe nanoparticles on the prepared titanium alloy or pure titanium with the TiO2 nanotubes; and finally, putting a nanotube array deposited with the SnSe nanoparticles into a silver nitrate solution, and chemically depositing nano-silver. The defect of the prior art is overcome, the obtained material is high in electrocatalysis efficiency, uniform nanoparticles with controllable sizes are distributed on the surface of the material, and the whole process has the characteristics of low cost and simple preparation process.

Description

technical field [0001] The invention relates to the field of nanomaterials, more specifically, to a method for modifying titanium dioxide nanomaterials and a method for depositing nanoparticle. Background technique [0002] Due to the shortage of energy, people began to look for environmentally friendly new energy materials to replace traditional ones. At present, people are concentrating on researching materials with high specific surface area and higher catalytic activity. Nano-TiO 2 As a green functional material, it has some special properties, such as: N-type semiconductor, chemical and mechanical stability, photocatalytic activity, biological activity, low preparation cost, etc. It has become one of the research hotspots in this field. with nano TiO 2 powder compared to TiO 2 Nanotubes have excellent properties such as low preparation cost, large specific surface area, regular surface morphology, good photostability and chemical inertness, and have higher adsorptio...

Claims

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Application Information

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IPC IPC(8): C25D11/26C25D5/18C25D9/08B22F9/24B82Y40/00B82Y30/00
Inventor 马利利杨贤金崔振铎朱胜利
Owner TIANJIN UNIV
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