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Preparation method of high(001)-crystal-facet ultrathin anatase nanosheet self-assembled microspheres

A technology of anatase and nanosheets, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high cost and complicated process, and achieve the effect of fast reaction speed, simple process and high photocatalytic performance

Active Publication Date: 2017-01-18
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the synthesis and research of this kind of novel three-dimensional self-assembled high (001) surface titanium dioxide microspheres are still in the preliminary exploration stage, and more synthesis preparation methods and more application space have yet to be explored; moreover, the currently proposed Microsphere preparation methods usually use two or more reagents, the process is relatively complicated, and the cost is not low

Method used

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  • Preparation method of high(001)-crystal-facet ultrathin anatase nanosheet self-assembled microspheres
  • Preparation method of high(001)-crystal-facet ultrathin anatase nanosheet self-assembled microspheres
  • Preparation method of high(001)-crystal-facet ultrathin anatase nanosheet self-assembled microspheres

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Embodiment 1

[0038] The preparation method of the high (001) surface ultrathin anatase nanosheet self-assembled microspheres provided by the present embodiment comprises the following steps:

[0039] (1) 0.48g potassium fluotitanate (K 2 TiF 6 , commercially available, the same below) was dissolved in 100mL deionized water and fully dissolved to obtain a 0.02mol / L reaction solution;

[0040] (2) the reaction solution prepared in step (1) is packed in the hydrothermal reactor of polytetrafluoroethylene liner, and filling degree is controlled to be about 70%, and a polytetrafluoroethylene thin plate is placed at the bottom of the reaction kettle, and the thickness of the thin plate is The shape matches the size of the bottom of the hydrothermal autoclave. After sealing the hydrothermal reaction kettle, put the reaction kettle into the heating box and raise the temperature to 200°C for 2 hours;

[0041] (3) After the reaction is over, take out the hydrothermal reactor in step (2) from the h...

Embodiment 2

[0046] The preparation method of the high (001) surface ultrathin anatase nanosheet self-assembled microspheres provided by the present embodiment comprises the following steps:

[0047] (1) 0.96g potassium hexafluorotitanate (K 2 TiF 6 ) was dissolved in 100mL deionized water and fully dissolved to obtain a 0.04mol / L reaction solution;

[0048] (2) the reaction solution prepared in the step (1) is packed in the hydrothermal kettle of the polytetrafluoroethylene liner, and the filling degree is controlled to be about 60%, and a polytetrafluoroethylene sheet is placed at the bottom of the reaction kettle, and the water is sealed. After heating the reaction kettle, put the reaction kettle into a heating box, and raise the temperature to 180°C for 2 hours;

[0049] (3) After the reaction is over, take out the hydrothermal reactor in step (2) from the heating box and cool it down naturally. After the temperature of the hydrothermal reactor drops to room temperature, open the rea...

Embodiment 3

[0054] The preparation method of the high (001) surface ultrathin anatase nanosheet self-assembled microspheres provided by the present embodiment comprises the following steps:

[0055] (1) 0.96g potassium hexafluorotitanate (K 2 TiF 6 ) was dissolved in 100mL deionized water and fully dissolved to obtain a 0.04mol / L reaction solution;

[0056] (2) the reaction solution that step (1) is made is packed in the hydrothermal reaction kettle of polytetrafluoroethylene liner, and filling degree is controlled to be about 80%, and a polytetrafluoroethylene thin plate is placed at the bottom of the reaction kettle, and the water is sealed. After heating the reaction kettle, put the reaction kettle into a heating box, and raise the temperature to 160°C for 3 hours;

[0057] (3) After the reaction is over, take out the hydrothermal reactor in step (2) from the heating box and cool it down naturally. After the temperature of the hydrothermal reactor drops to room temperature, open the ...

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Abstract

The invention discloses a preparation method of high(001)-crystal-facet ultrathin anatase nanosheet self-assembled microspheres. The preparation method comprises the following steps: (1) selecting potassium fluotitanate K2TiF6 and dissolving potassium fluotitanate in water to prepare a potassium fluotitanate solution, placing the potassium fluotitanate solution in a hydrothermal reaction vessel, sealing the hydrothermal reaction vessel and adjusting reaction temperature in the hydrothermal reaction vessel to 160-200 DEG C, carrying out a hydrolysis reaction for 1-5 h, and cooling to room temperature after the reaction; and (2) opening the hydrothermal reaction vessel, recovering the residual solution, collecting a sample, and drying to obtain the high(001)-crystal-facet ultrathin anatase nanosheet self-assembled microspheres. According to the preparation method, the synthesis raw materials are simple and easily available, required equipment is common, reaction time is short, reaction temperature is low, the technology is simple, cost is low, size of the synthesized ultrathin anatase nanosheet self-assembled microspheres is uniform, the microsphere surface is composed of (001) crystal facet of ultrathin anatase nanosheet, and the product has high photocatalytic performance and battery electrode application potential.

Description

technical field [0001] The invention belongs to the technical field of nano-titanium dioxide, and in particular relates to a method for preparing ultra-thin anatase nanosheet self-assembled microspheres with a high (001) plane. Background technique [0002] Nano-titanium dioxide is widely used in advanced fields such as photocatalysis, optoelectronic devices, sensors, solar cells and photonic crystals due to its good chemical and physical stability, environmental friendliness, abundant resources, and excellent photocatalytic performance. However, different synthesis methods not only affect the morphology and physicochemical properties of nano-TiO2, but also have a decisive impact on its photocatalytic performance. Among the three crystal structures of nano-titanium dioxide, anatase-type titanium dioxide has received more attention because its conduction band position is slightly higher than the hydrogen generation band, showing the best photocatalytic and photoelectric perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/053C01P2002/82C01P2004/03C01P2004/32C01P2004/45C01P2004/61C01P2004/62
Inventor 丁兴何俊杰孙卫东
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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