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Method for preparing nuclear-shell-structured rutile monocrystal titanium dioxide nanowire array with surface-cladding carbon layer

A nanowire array, titanium dioxide technology, applied in the process, microstructure technology, microstructure device and other directions for producing decorative surface effects, can solve problems such as increasing the preparation cost, achieve stable and efficient photocatalytic activity, reduce production costs, The effect of reducing energy consumption in production

Inactive Publication Date: 2011-06-29
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the use of a large amount of organic solvents in the preparation process, the preparation cost is increased

Method used

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  • Method for preparing nuclear-shell-structured rutile monocrystal titanium dioxide nanowire array with surface-cladding carbon layer
  • Method for preparing nuclear-shell-structured rutile monocrystal titanium dioxide nanowire array with surface-cladding carbon layer
  • Method for preparing nuclear-shell-structured rutile monocrystal titanium dioxide nanowire array with surface-cladding carbon layer

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preparation example Construction

[0027] The preparation of the rutile single crystal titania nanowire array can refer to the following method, but it is not necessary to follow the following method. The variation of the preparation method of the rutile single crystal titanium dioxide nanowire array does not constitute a limitation of the present invention.

[0028] Preparation of rutile single-crystal titanium dioxide nanowire arrays: under vigorous stirring, add 12ml of titanium tetrachloride to 400ml of ice water, cool in an ice-water bath, stir for 30 minutes, remove the ice-water bath, and continue stirring at room temperature for 2 hours to obtain hydrolyzed titanium tetrachloride liquid. At room temperature, immerse the cleaned substrate (conductive glass, silicon wafer, titanium wafer, glass, quartz or ceramics, etc.) in titanium tetrachloride hydrolysis solution for 24 hours, take it out, wash it with absolute ethanol three times, dry it, and then heat it at 550°C for 30 minutes , that is, dip-coated...

Embodiment 1

[0032] The prepared rutile single crystal titanium dioxide nanowire array (ceramic sheet as the substrate) was immersed in the aqueous solution of phenol and chloroplatinic acid, the concentrations were 0.5g / L and 1.25×10 -5 g / L. Solar radiation (about 38mJ / cm 2 ) after 8 hours, rinsed with distilled water, and dried at 80°C. Then, under the protection of high-purity argon, pyrolyze at 1000°C for 2 hours to obtain a nanowire array of rutile single crystal titanium dioxide core-shell structure coated with a carbon layer.

Embodiment 2

[0034] The prepared rutile single crystal titanium dioxide nanowire array (titanium sheet as the substrate) was immersed in 0.5 g / L phenol aqueous solution. 300W xenon lamp (PerkinElmer, light intensity about 58mJ / cm 2 ) after 6 hours of irradiation, rinsed with distilled water, and dried at 80°C. Then, under the protection of high-purity nitrogen, it was pyrolyzed at 800°C for 3 hours to obtain a nanowire array of rutile single crystal titanium dioxide core-shell structure coated with a carbon layer.

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Abstract

The invention discloses a method for preparing a nuclear-shell-structured rutile monocrystal titanium dioxide nanowire array with a surface-cladding carbon layer, and the method is characterized by comprising the following steps: (a) immersing a rutile monocrystal titanium dioxide nanowire array into a phenol aqueous solution or an aqueous solution of phenol and a precious metal salt, preparing arutile monocrystal titanium dioxide nanowire array with a surface-cladding polyphenol compound by using a photochemical reaction method, then taking out the rutile monocrystal titanium dioxide nanowire array with the surface-cladding polyphenol compound, washing with water, and drying; and (b) carrying out high-temperature pyrolysis on the rutile monocrystal titanium dioxide nanowire array with the surface-cladding polyphenol compound in the presence of inert gas to obtain the nuclear-shell-structured rutile monocrystal titanium dioxide nanowire array with the surface-cladding carbon layer. By means of the preparation method disclosed by the invention, clean and pollution-free solar energy can be fully utilized so as to effectively reduce the energy consumption for production and the production cost. The prepared nuclear-shell-structured rutile monocrystal titanium dioxide nanowire array with the surface-cladding carbon layer not only has stable and efficient photocatalytic activity, but also can achieve wide-spectrum response to visible light so as to obviously improve the photo quantum yield of the titanium dioxide nanowire array and improve the solar utilization rate, and can be widely applied to the fields of hydrogen production through photodecomposition of water, pollutant degradation through photocatalysis and the like.

Description

technical field [0001] The invention relates to a preparation method of a nanometer material, in particular to a preparation method of a rutile single crystal titanium dioxide core-shell structure nanowire array covered with a carbon layer. Background technique [0002] Nano-titanium dioxide has a wide range of applications in the fields of photocatalysis, dye-sensitized solar cells, gas sensors and nano-devices. Constructing a one-dimensional ordered single-crystal titanium dioxide nanowire array photoelectrode can make photogenerated electrons directly transport along one-dimensional nanomaterials and conductive substrates, thereby effectively reducing photogenerated electron-hole pair recombination and improving quantum yield (CN101786597A; Grimes , Nano Letter, 2008: 3781; Eray S. Aydil, J.A.C.S, 2009: 3985). However, since titanium dioxide is a wide-bandgap semiconductor compound (3.0-3.2eV), it can only work in the ultraviolet range (accounting for about 3% of solar e...

Claims

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Application Information

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IPC IPC(8): B81C1/00
Inventor 赵才贤罗和安张平张永胜廖晨阳刘娴
Owner XIANGTAN UNIV
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