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TiO2 nuclear shell structure nano rod array coated with carbon bed and preparation method thereof

A nanorod array, core-shell structure technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problem of no literature report on the preparation method of nanorod array, and achieve the advantages of charge separation, regular arrangement and specific surface area. big effect

Inactive Publication Date: 2013-01-02
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far TiO coated with carbon layer 2 There is no literature report on the core-shell nanorod array and its preparation method

Method used

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  • TiO2 nuclear shell structure nano rod array coated with carbon bed and preparation method thereof
  • TiO2 nuclear shell structure nano rod array coated with carbon bed and preparation method thereof
  • TiO2 nuclear shell structure nano rod array coated with carbon bed and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix 10ml of triethylamine, 20ml of oleic acid, 40ml of cyclohexane, 4ml of n-butyl titanate, and 0.05g of ammonium bicarbonate, add a 100ml hydrothermal kettle, and then put clean ITO glass as a hydrophilic matrix. Insulate at 180°C for 24h, take out the ITO glass after natural cooling, wash with ethanol for 5 times, dry in vacuum at 80°C for 12h, and then heat-treat at 500°C for 3h under the protection of high-purity argon to obtain TiO with a carbon layer on the surface. 2 Core-shell nanorod arrays. Scanning electron microscope results showed that, as image 3 Shown: TiO 2 Nanorods perpendicular to the ITO glass matrix, TiO 2 The nanorods are regular and orderly, uniform in thickness and about 50nm in diameter. High-resolution transmission electron microscopy (HRTEM) showed that, if Figure 4 Shown, TiO 2 The thickness of the carbon layer coated on the surface of the nanorod is about 3nm. X-ray diffraction tests showed that, if Figure 5 Shown: TiO 2 The cryst...

Embodiment 2

[0041] Mix 10ml of triethylamine, 20ml of oleic acid, 40ml of cyclohexane, 4ml of n-butyl titanate, and 0.1g of ammonium bicarbonate, add a 100ml hydrothermal kettle, and then put clean ITO glass as a hydrophilic matrix. Insulate at 180°C for 24h, take out the ITO glass after natural cooling, wash with ethanol for 5 times, dry in vacuum at 80°C for 12h, and then heat-treat at 500°C for 3h under the protection of high-purity argon to obtain TiO with a carbon layer on the surface. 2 Core-shell nanorod arrays. Scanning electron microscope results showed that, as Figure 7 Shown: TiO 2 The nanorods are perpendicular to the ITO glass matrix, arranged neatly, uniform in thickness, with a diameter of about 80 nm and a length of about 5 μm. X-ray diffraction test shows that: TiO 2 The crystal form is a mixture of anatase and rutile, and the nanorods are oriented along the 002 crystal plane. The results of Raman spectroscopy show that the carbon layer is a mixture of amorphous carb...

Embodiment 3

[0043] Mix 10ml of triethylamine, 20ml of oleic acid, 40ml of cyclohexane, 4ml of n-butyl titanate, and 0.05g of ammonium bicarbonate, add a 100ml hydrothermal kettle, and then put a clean quartz plate as a hydrophilic matrix. Insulate at 180°C for 24h, take out the quartz plate after natural cooling, wash 5 times with ethanol, dry in vacuum at 80°C for 12h, and then heat-treat at 500°C for 3h under the protection of high-purity argon to obtain TiO coated with a carbon layer on the surface 2 Core-shell nanorod arrays. Scanning electron microscope results showed that: TiO 2 The nanorods are perpendicular to the quartz sheet, arranged neatly, with a diameter of about 50nm and a length of about 5μm.

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Abstract

The invention discloses a TiO2 nuclear shell structure nano rod array coated with carbon bed, the core of the nano rod is TiO2 nano rod, the diameter thereof is 20-100nm, the shell thereof is the carbon bed, the thickness thereof is 2-10nm. The preparation method has the following steps: a) under the condition of solvent heat condition, interface reaction of non-polar solvent / hydrophilic matrix is employed to prepare the TiO2 nano rod with surface modified by oleic acid; b) with the protection of inert gas, warming calcination is carried out to obtain the TiO2 nuclear shell structure nano rodcoated with carbon bed. The invention has the following beneficial effects: under the condition of solvent heat condition, interface reaction of non-polar solvent / hydrophilic matrix is employed to prepare the TiO2 nano rod with surface modified by oleic acid, then warming calcination is carried out to carbonize oleic acid on the surface to prepare the TiO2 nuclear shell structure nano rod array coated with carbon bed, with such steps, the invention features simple process and low cost, can prepare a large area of TiO2 nano rod array; in addition, the nano rod array features good crystallization performance, large specific surface area, is beneficial to improving charge capacity of the dye, adsorption to pollutants, charge separation of a photoproduction current carrier and increasing quantum yield, thus being capable of being widely applied to fields such as photocatalysis and O / E conversion.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Nanorod arrays and methods of making them. 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. 1D TiO 2 Nanorods are used in the separation of photogenerated charges, the lifetime of charges, the inhibition of charge recombination, the transport of charges (also known as electronic highways, Suzuki, Eur.J.Chem, 2006: 476), and the scattering of light And many other aspects have incomparable advantages of nanoparticles. Constructing array-ordered one-dimensional TiO 2 The nanorod photoelectrode can transmit photogenerated electrons along one-dimensional nanomaterials and conductive substrates, thereby effectively reducing electron-hole recombination and improving quantum yield. Therefore, it has very important theoretical research value and good practical application prospect. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B1/00B82B3/00
Inventor 张平罗和安赵才贤易伟龙丝曦陈广兵伍彬
Owner XIANGTAN UNIV
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