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Titanium dioxide/lead titanate compounded nanometer photocatalyst and preparation method thereof

A nano-photocatalyst and titanium dioxide technology, which is applied in the fields of inorganic non-metallic materials and nano-photocatalytic materials, can solve the problems of less research on influence and mechanism, difficult absorption of visible light, etc. Effect

Inactive Publication Date: 2013-08-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Titanium dioxide (TiO 2 ) is currently the most widely studied photocatalytic material, and its band gap is about 3.2 eV. It is a typical catalyst that absorbs ultraviolet light, but it is difficult to absorb visible light.
At present, research in this area mainly focuses on thin films, and there are few studies on the influence and mechanism of ferroelectric domains of ferroelectric nanoparticles on photocatalytic reactions.

Method used

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  • Titanium dioxide/lead titanate compounded nanometer photocatalyst and preparation method thereof
  • Titanium dioxide/lead titanate compounded nanometer photocatalyst and preparation method thereof
  • Titanium dioxide/lead titanate compounded nanometer photocatalyst and preparation method thereof

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Effect test

Embodiment 1

[0019] 1) 0.2 g monodisperse single crystal single domain perovskite phase PbTiO prepared by hydrothermal method 3 Add single crystal nanosheets into deionized water and disperse ultrasonically for 15 minutes to make them evenly dispersed;

[0020] 2) Configure 0.005 mol / L TiF 4 aqueous solution;

[0021] 3) The TiF of step 2) 4 The aqueous solution is added to the solution obtained in step 1), and then transferred to the polytetrafluoroethylene reactor liner, and the volume is adjusted to 2 / 3 of the reactor volume with deionized water, and stirred for 5 minutes to obtain a suspension;

[0022] 4) Place the reactor liner equipped with reaction materials in step 3) in the reactor, airtight, and place at 160 o Keep warm in the furnace of C, after reacting for 10 minutes, place in the air to cool down to room temperature naturally, take out the reaction product, filter, wash with deionized water, and dry to obtain titanium dioxide / lead titanate composite nano photocatalyst.

Embodiment 2

[0024] 1) 0.5 g monodisperse single-crystal single-domain perovskite phase PbTiO prepared by hydrothermal method 3 Add single crystal nanosheets into deionized water and disperse ultrasonically for 15 minutes to make them evenly dispersed;

[0025] 2) Configure 0.02 mol / L TiF 4 aqueous solution;

[0026] 3) The TiF of step 2) 4 The aqueous solution was added to the solution obtained in step 1), and then transferred to the polytetrafluoroethylene reactor liner, and the volume was adjusted to 4 / 5 of the reactor volume with deionized water, and stirred for 5 minutes to obtain a suspension;

[0027] 4) Place the reactor liner equipped with reaction materials in step 3) in the reactor, airtight, and place at 180 o Keep warm in the furnace of C, after reacting for 60 minutes, place in the air and cool down to room temperature naturally, take out the reaction product, filter, wash with deionized water, and dry to obtain titanium dioxide / lead titanate composite nano photocatalyst. ...

Embodiment 3

[0029] 1) 1.0 g monodisperse single-crystal single-domain perovskite phase PbTiO prepared by hydrothermal method 3 Add single crystal nanosheets into deionized water and disperse ultrasonically for 15 minutes to make them evenly dispersed;

[0030] 2) Configure 0.2 mol / L TiF 4 aqueous solution;

[0031] 3) The TiF of step 2) 4 The aqueous solution was added to the solution obtained in step 1), and then transferred to the polytetrafluoroethylene reactor liner, and the volume was adjusted to 4 / 5 of the reactor volume with deionized water, and stirred for 5 minutes to obtain a suspension;

[0032] 4) Place the reactor liner equipped with reaction materials in step 3) in the reactor, airtight, and place at 180 o Keep warm in the furnace of C, after reacting for 90 minutes, place it in the air to cool down to room temperature naturally, take out the reaction product, filter, wash with deionized water, and dry to obtain titanium dioxide / lead titanate composite nano photocatalyst....

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Abstract

The invention discloses a titanium dioxide / lead titanate compounded nanometer photocatalyst and a preparation method thereof. The titanium dioxide / lead titanate compounded nanometer photocatalyst is a heterogeneous structure material formed by distributing titanium dioxide nano particles on the surface of lead titanate nano sheets. The preparation method comprises the following steps of dispersing lead titanate nano sheets synthetized through a hydrothermal method into deionized water; preparing a titanium source water solution; and dropwise adding the titanium source water solution into the lead titanate nano sheet water solution, then transferring into a hydrothermal reaction kettle, after hydrothermal reaction, cooling to room temperature, filtering, washing, and drying. The preparation method is simple and easy to control, and has low requirement on equipment; and the prepared titanium dioxide / lead titanate compounded nanometer photocatalyst can be used for regulating the ultraviolet light catalysis of the titanium dioxide into visible light catalysis.

Description

technical field [0001] The invention relates to a titanium dioxide / lead titanate composite nano photocatalyst and a preparation method thereof, belonging to the technical field of inorganic non-metallic materials and nano photocatalytic materials. Background technique [0002] Titanium dioxide (TiO 2 ) is currently the most widely studied photocatalytic material, with a band gap of about 3.2 eV, which is a typical catalyst for absorbing ultraviolet light, but it is difficult to absorb visible light. In order to enhance the TiO 2 The absorption of visible light is usually used for TiO 2 Doping or combining with other semiconductor materials can improve its absorption of visible light. to TiO 2 Metal ion doping can form a new absorption state, that is, form a new energy level structure, reduce the forbidden band width, and increase the range of spectral absorption. Semiconductor recombination can promote charge separation through effective valence band adjustment and redu...

Claims

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Application Information

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IPC IPC(8): B01J23/14
Inventor 韩高荣肖珍任召辉徐刚翁文剑杜丕一沈鸽
Owner ZHEJIANG UNIV
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