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Preparation method of titanium dioxide nanotube array sensitized by cadmium sulfide nanoparticles

A nanotube array and nanoparticle technology, applied in chemical instruments and methods, crystal growth, electrolytic coatings, etc., can solve the problems of complex process, lower photoelectric conversion efficiency, high toxicity, etc., achieve simple operation, improve photoelectric conversion efficiency, The effect of improving the utilization rate

Inactive Publication Date: 2011-01-26
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of CdS prepared by the electrodeposition method is relatively large (>50nm), and the electrolyte used is a dimethyl sulfoxide solution containing saturated sulfur. In order to fully dissolve the sulfur, a certain amount of benzene needs to be added to the electrolyte to increase the sulfur Solubility (S.G.Chen, M.Paulose, C.Ruan, G.K.Mor, O.K.Varghese, D.Kouzoudis, C.A.Grimes, J.Photochem.Photobiol., A2006, 177, 177-184), or at 110 or 50 ℃ and Ultrasound is assisted to improve the solubility of sulfur, but it is unavoidable that excessive sulfur is deposited on the surface of the array film, which reduces the photoelectric conversion efficiency (Chenglin Wang, Lan Sun, HongYun, Jing Li, Yuekun Lai, Changjian Lin, Nanotechnology, 2009, 20: 295601 )
These methods are either highly toxic, or the process is complicated, and high temperature is required to synthesize, so they are not suitable for industrial application.

Method used

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  • Preparation method of titanium dioxide nanotube array sensitized by cadmium sulfide nanoparticles
  • Preparation method of titanium dioxide nanotube array sensitized by cadmium sulfide nanoparticles
  • Preparation method of titanium dioxide nanotube array sensitized by cadmium sulfide nanoparticles

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Experimental program
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Effect test

Embodiment 1

[0020] (1) The base material is a pure titanium foil with a thickness of 0.1 mm, which is ultrasonically cleaned with acetone, ethanol and water three times, and dried in air for use. Formulated with 0.5wt% NH 4 A mixed solution of glycerol and water (volume ratio 2:1) of F, with platinum as the counter electrode at room temperature, electrochemical anodic oxidation at 20V for 30min, and then the film layer was heat-treated at 450°C for 2h, that is, on titanium Ordered anatase TiO obtained on foil surface 2 Nanotube array film layer.

[0021] (2) Prepare CdS nanoparticles sensitized TiO by galvanostatic electrodeposition 2 array of nanotubes. Put the sample prepared in step (1) into the DMSO electrolyte with S concentration of 0.03M and Cd / S concentration ratio of 1:4, with a platinum electrode as the counter electrode, and the current density is -0.75mA / cm 2 CdS nanoparticles sensitized TiO was obtained by depositing at room temperature for 5min 2 array of nanotubes. fr...

Embodiment 2

[0023] (1) TiO 2 The preparation of the nanotube array film layer is the same as in Example 1.

[0024] (2) Put the sample prepared in step 1 into a DMSO electrolyte with a S concentration of 0.01M and a Cd / S concentration ratio of 1:4, with a platinum electrode as the counter electrode, and a current density of -0.25mA / cm 2 CdS nanoparticles sensitized TiO was obtained by depositing at room temperature for 10 min under the conditions of 2 array of nanotubes.

Embodiment 3

[0026] (1) TiO 2The preparation of the nanotube array film layer is the same as in Example 1.

[0027] (2) Put the sample prepared in step 1 into a DMSO electrolyte with a S concentration of 0.01M and a Cd / S concentration ratio of 1:2, with a platinum electrode as the counter electrode, and a current density of -0.25mA / cm 2 CdS nanoparticles sensitized TiO was obtained by depositing at room temperature for 5min 2 array of nanotubes.

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Abstract

The invention provides a preparation method of a titanium dioxide nanotube array sensitized by cadmium sulfide nanoparticles, which relates to the preparation method of the titanium dioxide nanotube array. The preparation method comprises the following steps: preprocessing the surface of a substrate material; by taking the mixed solution of water and glycerol containing 0.25-1.0wt% of NH4F as an electrolyte, taking platinum metal as a counter electrode and controlling the voltage at 10-30V, carrying out electrochemical anodic oxidation on the substrate to construct a layer of TiO2 nanotube array film on the surface of the substrate; carrying out heat treatment on the film layer to obtain an anatase TiO2 nanotube array film; and depositing the obtained anatase TiO2 nanotube array film in the DMSO electrolyte of which the S concentration is 0.01-0.05M and the Cd / S concentration ratio is 1:(1-4), and taking out and drying the sample to obtain the titanium dioxide nanotube array sensitized by the cadmium sulfide nanoparticles. The preparation process has simple operation, and the industrialization can be realized easily.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide nanotube array, in particular to a room temperature preparation method of a visible light-responsive cadmium sulfide nanoparticle sensitized titanium dioxide nanotube array. Background technique [0002] In recent years, the self-assembly of nanostructures on the surface of metal or semiconductor materials by electrochemical anodization has attracted great research interest. Among them, titanium dioxide (TiO 2 ) nanotube array films are of particular interest. The nanotubes in this material are evenly distributed and arranged in a very orderly and regular array. The specific surface is large and has a high quantum effect. The nanotubes are directly connected to the metal titanium conductive substrate, and the combination is firm; the energy gap of the material is relatively large. Large, the photogenerated electrons and holes generated have high potentials, strong oxidation-reduction...

Claims

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Application Information

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IPC IPC(8): C25D11/26C30B29/16C30B30/02
Inventor 孙岚谢鲲鹏吴奇王梦晔林昌健
Owner XIAMEN UNIV
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