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Method used for preparing TiO2/Cu2O nano heterojunction by composite mask method

A composite mask and heterojunction technology, which is applied in the field of TiO2/Cu2O nano-heterojunction prepared by the composite mask method, can solve the problems of complicated process, uneven distribution and agglomeration, difficult control, etc., and achieve excellent photoelectric performance and smooth surface , size controllable effect

Active Publication Date: 2013-11-27
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, TiO 2 There are two main problems in the application of nanotube array films: first, due to its wide band gap (about 3.2eV), it only absorbs light in the ultraviolet region, which greatly limits its practical application in sunlight; . Since the photogenerated carriers are easy to recombine, the utilization efficiency of the photovoltaic effect is relatively low, which restricts the full play of its photoelectric performance
[0006] However, the current research has the following main problems: some use electrochemical technology twice, the operation is cumbersome, and it is not easy to control; some use TiO 2 The nanotube array is rough and uneven; some Cu 2 O grains are large and can only grow at the nozzle, with uneven distribution and serious agglomeration; some Cu 2 The form of O is a entangled network, the process is complicated, and it is difficult to control; these all affect the photoelectric activity of heterojunction materials

Method used

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  • Method used for preparing TiO2/Cu2O nano heterojunction by composite mask method
  • Method used for preparing TiO2/Cu2O nano heterojunction by composite mask method
  • Method used for preparing TiO2/Cu2O nano heterojunction by composite mask method

Examples

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Embodiment 1

[0033] ①、TiO2 2 Fabrication of Nanotube Array Thin Films

[0034] 0.5g NH 4 Dissolve F in 1mL water, stir well and add it into 49mL ethylene glycol and mix evenly to prepare bath A. Add the bath solution A into the electrolytic cell, use the cleaned titanium sheet as the anode, and the graphite electrode as the cathode, use a constant current stabilized power supply to apply a voltage of 20V to anodize for 0.5h, and then apply a voltage of 60V to anodize for 6h. Take it out and anneal it in a tube furnace at 500°C for 2h. Prepared TiO 2 nanotube array films, see figure 2 and 3 , it can be seen that the tube diameter is 100-150nm, the tube length is 4-80um, and the surface is smooth and highly ordered.

[0035] ②、TiO2 2 Fabrication of Nanotube Array Thin Film Mask

[0036] Dissolve 0.5ml of phenyltriethoxysilane into 48ml of methanol solution, slowly add 1.5ml of deionized water dropwise under slow stirring conditions, and continue stirring for 1h to prepare a phenyltr...

Embodiment 2

[0040] ①、TiO2 2 Fabrication of Nanotube Array Thin Films

[0041] 0.5g NH 4 Dissolve F in 1mL water, stir well and add it into 49mL ethylene glycol and mix evenly to prepare bath A. Add the bath solution A into the electrolytic cell, use the cleaned titanium sheet as the anode, and the graphite electrode as the cathode, use a constant current stabilized power supply to apply a voltage of 25V to anodize for 0.5h, and then apply a voltage of 70V to anodize for 5h. Take it out and anneal it in a tube furnace at 500°C for 2h.

[0042] ②、TiO2 2 Fabrication of Nanotube Array Thin Film Mask

[0043] Dissolve 0.5ml of phenyltriethoxysilane into 48ml of methanol solution, slowly add 1.5ml of deionized water dropwise under slow stirring conditions, and continue stirring for 2h to prepare a phenyltriethoxysilane-methanol composite solution. TiO prepared in step ① 2 The nanotube array thin film was put into the composite solution of phenyltriethoxysilane and methanol, and stirred sl...

Embodiment 3

[0047] ①、TiO2 2 Fabrication of Nanotube Array Thin Films

[0048] 0.6g NH 4 Dissolve F in 1mL water, stir well and add it into 49mL ethylene glycol and mix evenly to prepare bath A. Add the bath solution A into the electrolytic cell, use the cleaned titanium sheet as the anode, and the graphite electrode as the cathode, use a constant-current stabilized power supply to apply a voltage of 30V for anodization for 1h, and then apply a voltage of 80V for anodization for 4h. Take it out and anneal it in a tube furnace at 500°C for 2h.

[0049] ②、TiO2 2 Fabrication of Nanotube Array Thin Film Mask

[0050] Dissolve 0.5ml of phenyltriethoxysilane into 48ml of methanol solution, slowly add 1.5ml of deionized water dropwise under slow stirring conditions, and continue stirring for 2h to prepare a phenyltriethoxysilane-methanol composite solution. TiO prepared in step ① 2 The nanotube array thin film was put into the composite solution of phenyltriethoxysilane and methanol, and st...

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Abstract

The invention belongs to the field of photoelectric nano-material technologies, and more specifically relates to a method used for preparing TiO2 / Cu2O nano heterojunction by composite mask method. The method comprises following steps: titanium sheets are subjected to secondary anodic oxidation so as to obtain TiO2 nanotube array thin films; the TiO2 nanotube array thin films are immersed in a compound solution of phenyltriethoxysilane and methanol, and the TiO2 nanotube array thin films with super-hydrophobicity are prepared by mask method and ultraviolet light treatment; and then Cu2O nanocrystals produced by the high-frequency impulse electrodeposition method are uniformly distributed on the surface and inner wall of the TiO2 nanotube array thin films to obtain the TiO2 / Cu2O nano heterojunction. The photoelectric property of the TiO2 / Cu2O nano heterojunction is higher than 6 to 14 times of the photoelectric property of the TiO2 nanotube array; the photoelectric property is excellent; and the TiO2 / Cu2O nano heterojunction can be used as ideal materials for solar energy photoelectric conversion and solar energy efficient utilization.

Description

technical field [0001] The invention relates to the technical field of optoelectronic nanomaterials, in particular to a compound mask method for preparing TiO 2 / Cu 2 O nanoheterojunction. Background technique [0002] TiO 2 It has unique advantages such as stable chemical properties, wide application range, non-toxicity, high catalytic activity, and strong oxidation ability, making it an excellent semiconductor material for photocatalysis. TiO 2 Nanotube array films have more 2 The more excellent photoelectric performance of the material is considered to be an ideal material for solar photoelectric conversion and efficient utilization of solar energy. [0003] However, TiO 2 There are two main problems in the application of nanotube array films: first, due to its wide band gap (about 3.2eV), it only absorbs light in the ultraviolet region, which greatly limits its practical application in sunlight; 1. Since the photogenerated carriers are easy to recombine, the utili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/00C25D11/26C25D5/18B82Y40/00
Inventor 舒霞吴玉程沈天阔王岩
Owner HEFEI UNIV OF TECH
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