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Molybdenum and carbon-codoped titanium oxide nanotube array thin film material and preparation method thereof

A technology of titanium oxide nanotubes and thin film materials, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that transition metal/non-metal co-doping cannot be realized and no transition is seen. Co-doped titanium oxide nanotube arrays with metal/non-metal elements

Inactive Publication Date: 2014-07-16
ZHANGJIAGANG GREEN TECH ENVIRONMENTAL PROTECTION EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of TiO by anodic oxidation 2 The process characteristics of nanotube arrays make it difficult for transition metal elements to be uniformly doped into TiO in the form of metal ions. 2 In the crystal lattice, transition metal / nonmetal co-doping is also impossible
So far, there have been no reports on transition metal / nonmetal elements co-doped titania nanotube arrays

Method used

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  • Molybdenum and carbon-codoped titanium oxide nanotube array thin film material and preparation method thereof
  • Molybdenum and carbon-codoped titanium oxide nanotube array thin film material and preparation method thereof
  • Molybdenum and carbon-codoped titanium oxide nanotube array thin film material and preparation method thereof

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Embodiment 1

[0036] The Ti-5Mo alloy was heat-treated to obtain a single-phase structure, sliced, polished, and then anodized in an ethylene glycol solution with a mass fraction of ammonium fluoride of 0.3% and a volume fraction of water of 3% at a working voltage of 30V for 2h. A titanium oxide nanotube array film with a thickness of about 2.4 μm, a tube diameter of about 80 nm, and a molybdenum-titanium atomic ratio of 0.068 was obtained. The molybdenum-containing titanium oxide nanotube array film is heat-treated in air at 500° C. for 2 hours to obtain a molybdenum-doped titanium oxide nanotube array film. The molybdenum-doped titanium oxide nanotube array film was heat-treated at 550° C. for 3 hours in a carbon monoxide atmosphere to obtain a molybdenum-carbon co-doped titanium oxide nanotube array with a carbon-titanium atomic ratio of 0.08 (see figure 1 , 2 and Table 1).

[0037] Table 1 Composition analysis results of molybdenum-carbon co-doped titania nanotube arrays

[0038] ...

Embodiment 2

[0042] The absorption spectrum of molybdenum-carbon co-doped titanium oxide nanotube array film was measured by UV-vis2550 ultraviolet-visible spectrophotometer, and compared with the undoped titanium oxide nanotube array film of the same thickness. The results show that the visible light absorption ability of molybdenum carbon co-doped titania nanotube array film is much higher than that of undoped titania nanotube array film (see image 3 ).

Embodiment 3

[0044] With an intensity of 100mW / cm 2 The simulated sunlight was used as the light source, the 0.2M sodium sulfate solution was used as the electrolyte, and the molybdenum-carbon co-doped titanium oxide nanotube array film was used as the photoanode to investigate its photoelectrochemical performance under simulated sunlight. The results show that the photocurrent density of molybdenum carbon co-doped titania nanotube array film is 400mA / cm 2 , more than 2 times higher than that of the undoped sample (see Figure 4 a).

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Abstract

The invention belongs to the technical field of an environmental material, and particularly relates to a molybdenum and carbon-codoped titanium oxide nanotube array thin film material and a preparation method thereof. The molybdenum and carbon codoping of a titanium oxide nanotube can be realized by introducing molybdenum element into the titanium oxide nanotube formed on a titanium sheet and the surface thereof through alloying, and then introducing carbon element through carbon monoxide atmospheric thermal treatment; in the obtained molybdenum and carbon-codoped titanium oxide nanotube array thin film material, a part of titanium atoms in the titanium oxide nanotube are replaced by molybdenum, a part of oxygen atoms are replaced by carbon, the ratio of the molybdenum atoms to carbon atoms ranges from 0.03 to 0.15, and the ratio of the doped carbon atoms to titanium atoms ranges from 0.01 to 0.09. The thin film material is attached to a titanium alloy substrate, and comprises orderly titanium oxide nanotubes perpendicular to the substrate. The photocatalysis and photo-electrochemical properties of the thin film material in visible light are far higher than those of the traditional titanium oxide thin film material, and the thin film material has excellent application prospects on the aspects of photocatalytically degrading organic matters in water and reducing heavy metal ions.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and specifically relates to a molybdenum-carbon co-doped titanium oxide nanotube array film material and a preparation method thereof. Background technique [0002] Photocatalytic technology has great application value in environmental pollution control and clean energy production. The focus of its research and development is to design and synthesize efficient photocatalytic materials. As an excellent photocatalyst, TiO 2 The practical application still faces two key problems, namely no visible light response and low photocatalytic efficiency. Numerous studies have shown that through the TiO 2 Appropriate doping and morphology control can improve its visible light absorption ability and photocatalytic performance. [0003] TiO 2 The special structure of the nanotube array makes it have a series of advantages. Its ordered structure and thin-walled characteristics can increase t...

Claims

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Application Information

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IPC IPC(8): C25D11/26B82Y40/00B82Y30/00B32B9/04
Inventor 尚建库徐正超李琦
Owner ZHANGJIAGANG GREEN TECH ENVIRONMENTAL PROTECTION EQUIP
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