Preparation method of graphite phase carbon nitride/rutile monocrystal titanium dioxide (TiO2) nanowire array

A graphitic carbon nitride and nanowire array technology, applied in the field of photocatalysis, can solve the problems of unfavorable continuous process sewage treatment, cannot reduce photogenerated carrier recombination, etc. handy effect

Inactive Publication Date: 2011-07-20
XIANGTAN UNIV
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Problems solved by technology

However, the current reports on carbon nitride and titanium dioxide composite photocatalysts are limited to nano-powder materials, which cannot reduce the recombination of photogenerated carriers at grain boundaries and between catalyst particles.
In addition, in the specific use process, such as degrading organic pollutants in wastewater, it is necessary to go through complicated photocatalyst separation steps, and it is also not conducive to the use of continuous processes to treat wastewater

Method used

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  • Preparation method of graphite phase carbon nitride/rutile monocrystal titanium dioxide (TiO2) nanowire array
  • Preparation method of graphite phase carbon nitride/rutile monocrystal titanium dioxide (TiO2) nanowire array
  • Preparation method of graphite phase carbon nitride/rutile monocrystal titanium dioxide (TiO2) nanowire array

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[0023] 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.

[0024] 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 hydrolyzed 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

[0028] The prepared rutile single crystal titanium dioxide nanowire array (titanium sheet as the substrate) was immersed in 30 g / L melamine aqueous solution for 48 hours, then taken out, and dried at 120° C. Then, under an argon atmosphere, pyrolyze at 300° C. for 3 hours to obtain a graphitic carbon nitride / rutile single crystal titanium dioxide nanowire array.

Embodiment 2

[0030] The prepared rutile single-crystal titanium dioxide nanowire array (ceramic as the substrate) was immersed in 50 g / L cyanamide aqueous solution for 24 hours, then taken out, and dried at 120° C. Then, under nitrogen atmosphere, pyrolyze at 600° C. for 1 hour to obtain graphite phase carbon nitride / rutile single crystal titanium dioxide nanowire array.

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Abstract

The invention discloses a preparation method of a graphite phase carbon nitride/rutile monocrystal titanium dioxide (TiO2) nanowire array. The preparation method is characterized by comprising the following steps: (a) dissolving a cyanamide compound or urea in a solution, immersing the prepared rutile monocrystal TiO2 nanowire array into the obtained cyanamide compound or urea solution, and then taking out and drying the nanowire array; and (b) performing heat treatment on the dried nanowire array to finally obtain the graphite phase carbon nitride/rutile monocrystal TiO2 nanowire array. The preparation method has the advantages of simple process and low cost, thus being applicable to large-scale industrial production; and the prepared graphite phase carbon nitride/rutile monocrystal TiO2 nanowire array has good visible light response activity, and can be widely applied to the fields such as photocatalysis, hydrogen production by photocatalytic decomposition of water, photoelectric conversion and the like.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide nanowire array, in particular to a preparation method of a graphite phase carbon nitride / rutile single crystal titanium dioxide nanowire array with visible light response activity, and belongs to the field of photocatalysis. Background technique [0002] Semiconductor photocatalysis technology has attracted widespread attention of researchers from various countries because it can combine the use of pure, non-polluting and inexhaustible solar energy with environmental protection. The one-dimensional ordered single-crystal titanium dioxide nanowire array can make the photogenerated electrons transport directly along the one-dimensional nanomaterial and the substrate, reduce the recombination of photogenerated carriers (electron-hole pairs) at the grain boundary, and effectively improve the quantum efficiency. Yield (CN101786597A; Grimes, Nano Letter, 2008: 3781; Eray S. Aydil, J.A.C.S, 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J21/06B01J37/00B01J37/02
Inventor 张平罗和安赵才贤陈烽张永胜
Owner XIANGTAN UNIV
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