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Preparation method of large-specific-surface-area anatase TiO2 nanotubes assembled from nanosheets which are capable of exposing high-energy {111} crystal faces

A {111}, large specific surface area technology, applied in the field of low-dimensional structure semiconductor optoelectronic materials, to achieve the effect of low cost, good repeatability and consistency, and enhanced optoelectronic performance

Inactive Publication Date: 2017-12-19
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, the research group of Professor Ye Jinhua from Hokkaido University in Japan passed TiF 4 Preparation of TiO by Solvothermal Reaction with Ethanol, Acetonitrile and Ammonia 2 The precursor was annealed at 500 °C and 600 °C for 2 h in air, and TiO with exposed high-energy {111} crystal planes was finally obtained. 2 product, but its surface area is only 11.6m 2 / g

Method used

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  • Preparation method of large-specific-surface-area anatase TiO2 nanotubes assembled from nanosheets which are capable of exposing high-energy {111} crystal faces
  • Preparation method of large-specific-surface-area anatase TiO2 nanotubes assembled from nanosheets which are capable of exposing high-energy {111} crystal faces
  • Preparation method of large-specific-surface-area anatase TiO2 nanotubes assembled from nanosheets which are capable of exposing high-energy {111} crystal faces

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Experimental program
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Effect test

Embodiment 1

[0026] 0.01g TiOSO 4 ·xH 2 O (analytically pure), 5mL glacial acetic acid (analytical pure) and 5mL deionized water were added to the beaker, stirred evenly to obtain a white turbid liquid, and spread the obtained white turbid liquid to a clean area of ​​1×1cm 2 Then the silicon wafer was placed in a tube furnace and heated at 600°C for 10 minutes to obtain anatase TiO with large specific surface area assembled by exposing high-energy {111} crystal facet nanosheets. 2 nanotube.

[0027] Depend on Figure 1~3 It can be seen that the prepared sample is made of anatase phase TiO 2 Nanotubes assembled from nanosheets, composed of Figure 4~6 It can be seen that the sheet structure grows along the (101) and (011) directions, exposing the high-energy {111} crystal plane, which is obtained by Figure 7 It can be seen that the pore size distribution is about 30nm, and the specific surface area reaches 119m 2 / g.

Embodiment 2

[0029] 0.005g TiOSO 4 ·xH 2 O (analytically pure), 5mL glacial acetic acid (analytical pure) and 5mL deionized water were added to the beaker, stirred evenly to obtain a white turbid liquid, and spread the obtained white turbid liquid to a clean area of ​​1×1cm 2 Then the silicon wafer was placed in a tube furnace and heated at 600°C for 10 minutes to obtain the exposed high-energy {111} crystal facet anatase TiO 2 Nanosheets assembled into nanotubes (see Figure 8 ).

Embodiment 3

[0031] 0.1g TiOSO 4 ·xH 2 O (analytically pure), 5mL glacial acetic acid (analytical pure) and 5mL deionized water were added to the beaker, stirred evenly to obtain a white turbid liquid, and spread the obtained white turbid liquid to a clean area of ​​1×1cm 2 Then the silicon wafer was placed in a tube furnace and heated at 600°C for 10 minutes to obtain the exposed high-energy {111} crystal facet anatase TiO 2 Nanosheets assembled into nanotubes (see Figure 9 ).

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Abstract

The invention discloses a preparation method of large-specific-surface-area anatase TiO2 nanotubes assembled from nanosheets which are capable of exposing high-energy {111} crystal faces. The preparation method comprises taking TiOSO4.xH2O as a raw material and glacial acetic acid as a structure regulating agent, and adopting a simple solution fast thermal decomposition to obtain the nanotubes. The method is simple to operate, low in cost, and good in repeatability and consistency. The prepared nanosheets have enhanced physical and chemical performance with respect of photocatalysis, gas sensing, solar energy batteries, lithium ion batteries and super capacitors.

Description

technical field [0001] The invention belongs to the technical field of low-dimensional structure semiconductor optoelectronic materials, and in particular relates to a large specific surface area anatase TiO assembled with exposed high-energy {111} crystal plane nanosheets 2 Methods for the preparation of nanotubes. Background technique [0002] It is well known that the physical and chemical properties of semiconductor nanomaterials strongly depend on their size, morphology, crystal plane and specific surface area. Among them, nanostructured materials with exposed high-energy crystal planes and large specific surface areas have enhanced physical and chemical properties. Therefore, the preparation of semiconductor nanomaterials with high-energy crystal planes and large specific surface area has important scientific significance and potential application value. However, crystal planes with higher surface energy generally grow faster and are not easily exposed, and usually e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCB82Y40/00C01G23/053C01P2002/72C01P2004/03C01P2004/04C01P2004/13
Inventor 杨合情刘俊芳袁煜昆韩果萍刘彬赵桦王力杨娟王梦珠杜琴任岩张笑
Owner SHAANXI NORMAL UNIV