Method for preparing Pd doped TiO2 nanotube array composite material

Active Publication Date: 2009-12-02
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, as an important compound semiconductor material, TiO 2 The bandgap width of TiO2 determines that it can only absorb less than 5% of the ultraviolet light in sunlight, and cannot be excited by visible light, which accounts for most of the sunlight, which undoubtedly greatly limits the ability of TiO 2 Practical Progress of Ordered Array of Nanotubes

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  • Method for preparing Pd doped TiO2 nanotube array composite material

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Embodiment 1

[0031] like figure 1 As shown, the Pd-doped TiO described in the present invention 2 A method for preparing a nanotube array composite material, comprising the following steps:

[0032] Step 1, anodic oxidation is carried out to the pretreated pure titanium sheet, and it comprises the following steps:

[0033] 1.1. Pretreatment of pure titanium sheet: the oxide layer on the surface of the pure titanium sheet to be treated is removed by conventional mechanical processing. The pure titanium sheet is a flat sheet with a thickness of 0.1-1.0 mm.

[0034] The pure titanium sheet is an industrial pure titanium sheet. In the actual processing process, mechanical grinding is used to remove the oxide layer on the surface of the pure titanium sheet to be processed. Specifically, 600# and 1000# water abrasive papers are used for mechanical grinding to remove the surface of the pure titanium sheet. After removing the oxide layer on the surface of the pure titanium sheet to be treated, t...

Embodiment 2

[0047] In this example, the difference from Example 1 is that the pretreated pure titanium sheet in step 1.1 is a rectangular sheet of 100 mm × 20 mm × 0.3 mm; As the cathode, the voltage of the DC power supply used is 70V, the oxidation temperature is 10-70°C and the oxidation time is 26h. When performing ultrasonic oscillation in step 2, the oscillation time is 0.2h. The power of the ultraviolet lamp described in step 4 is 200W and the irradiation time is 1h. In this embodiment, the rest of the process steps and process parameters are the same as those in Example 1.

Embodiment 3

[0049] In this embodiment, the difference from Example 1 is: the pretreated pure titanium sheet in step 1.1 is a rectangular sheet of 100 mm × 20 mm × 0.3 mm; the anhydrous organic solvent for preparing the electrolyte in step 1.2 is Ethylene glycol, the solute is NH 4 F, and the volume ratio of ethylene glycol and water is 97:3, NH 4 The mass ratio of F to the prepared electrolyte is 0.3%; in step 1.3, when the pretreated pure titanium sheet is placed in the electrolyte for anodic oxidation reaction, that is, when the electrolytic oxidation reaction is performed, the stainless steel foil electrode is used as the cathode, The voltage of the DC power supply used is 30V, the oxidation temperature is room temperature and the oxidation time is 50h. PdCl described in step 3 2 The concentration is 0.3mol / L and the soaking time is 5h. The power of the ultraviolet lamp described in step 4 is 100W and the irradiation time is 2h. In this embodiment, the rest of the process steps and...

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Abstract

The invention discloses a method for preparing a Pd doped TiO2 nanotube array composite material, which comprises the following steps: 1, anodizing a pretreated pure titanium sheet to prepare a first-stage preliminary product; 2, washing the first-stage preliminary product with deionized water, and performing ultrasonic vibration in absolute alcohol to obtain a second-stage preliminary product; 3, steeping the second-stage preliminary product in PdCl2 solution for 5 to 20h, and drying to obtain a third-stage preliminary product; 4, illuminating the third-stage preliminary product by an ultraviolet lamp to directly reduce Pd ions in the PdCl2 adsorbed on the third-stage preliminary product into Pd particles to obtain a finished product; and 5, washing the finished product in absolute ethyl alcohol, and drying or baking. The method has the advantages of simple preparation process, convenient operation and reasonable design; and the prepared Pd doped TiO2 nanotube array has good performance and high photoelectric transformation efficiency, and can effectively push practical process of TiO2 nanotube ordered arrays.

Description

technical field [0001] The invention belongs to the field of nanoscience and photocatalysis technology, in particular to a Pd-doped TiO 2 Preparation method of nanotube array composite material. Background technique [0002] Since 2001, the preparation of TiO by anodized titanium foil was first reported. 2 Since the method of the ordered array of nanotubes, the research on the ordered structure of metal oxides on the nanometer scale has become a hot spot in the field of nanomaterials research, because TiO 2 The ordered array of nanotubes has unique characteristics different from nanopowders. Because of its unique ordered structure of nanotubes, it provides an effective channel for photogenerated electrons to fully contact other substances (such as water molecules). Hydrogen exhibits extremely high photoelectric conversion efficiency. In addition, it also has high-efficiency adsorption performance, excellent hydrogen sensitivity performance, microwave absorption performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00
Inventor 李广忠张健汤慧萍张文彦康新婷李亚宁
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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