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Photocatalyst capable of responding to visible light and near-infrared light and preparation method thereof

A photocatalyst, near-infrared light technology, applied in chemical instruments and methods, physical/chemical process catalysts, nanotechnology for materials and surface science, etc., can solve problems such as the inability to effectively utilize visible light and near-infrared light energy, Achieve excellent photocatalytic activity

Inactive Publication Date: 2017-12-15
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a photocatalyst that can respond to visible light and near-infrared light and its preparation method, aiming to solve the problem that existing photocatalysts cannot effectively utilize the energy of visible light and near-infrared light

Method used

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  • Photocatalyst capable of responding to visible light and near-infrared light and preparation method thereof

Examples

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Effect test

Embodiment 1

[0049] (1) Add 20 mg of black phosphorus crystals to 50 mL of NMP solvent, sonicate in an ice-water bath for 2 hours, centrifuge the sonicated sample at 2,000 rpm / min for 20 minutes, remove the centrifuged large-sized black phosphorus crystals, and centrifuge the centrifuged liquid at 6,000 rpm / min for 20 minutes , redispersing the obtained solid into a certain amount of NMP solvent to obtain black phosphorus nanosheet dispersion A;

[0050] (2) Weigh 0.34g of silver nitrate and 1g of dodecylamine into 10mL of toluene, stir well until completely dissolved to obtain a silver amine complex solution, take 0.2mL of silver amine complex solution and 0.5mL of TiO 2 Add (100mg / mL) to 5mL toluene, stir and mix well; then add 2mL acetaldehyde solution (5M) and place it in a 40°C water bath for reaction; take out the sample after 2.5h of reaction, centrifuge at 10000rmp / min for 20min to remove the solid Redispersed into toluene to give Ag / TiO 2 Nanocomposite Dispersion B.

[0051] (3)...

Embodiment 2

[0053] (1) Add 30 mg of black phosphorus crystals to 60 mL of NMP solvent, sonicate in an ice-water bath for 6 hours, centrifuge the sonicated sample at 2,000 rpm / min for 20 minutes, remove the centrifuged large-sized black phosphorus crystals, and centrifuge the centrifuged liquid at 6,000 rpm / min for 20 minutes , redispersing the obtained solid into a certain amount of NMP solvent to obtain black phosphorus nanosheet dispersion A;

[0054] (2) Weigh 0.34g of silver nitrate and 1g of dodecylamine into 10mL of cyclohexane, stir well until completely dissolved to obtain a silver amine complex solution, take 0.5mL of silver amine complex solution and 1mL of CeO 2 Add (100mg / mL) into 10mL cyclohexane, stir and mix well; then add 1mL propionaldehyde solution (4M) and place it in a water bath at 50°C for reaction; take out the sample after 3h of reaction, and centrifuge at 10000rmp / min for 20min The solid was redispersed into NMP to give Ag / CeO 2 Nanocomposite Dispersion B.

[00...

Embodiment 3

[0057] (1) Add 10 mg of black phosphorus crystals to 30 mL of NMP solvent, sonicate in an ice-water bath for 4 hours, centrifuge the sonicated sample at 2,000 rpm / min for 20 minutes, remove the centrifuged large-sized black phosphorus crystals, and centrifuge the centrifuged liquid at 6,000 rpm / min for 20 minutes , redispersing the obtained solid into a certain amount of NMP solvent to obtain black phosphorus nanosheet dispersion A;

[0058] (2) Weigh 0.34g of silver nitrate and 1g of dodecylamine into 10mL of NMP, stir well until completely dissolved to obtain a silver amine complex solution, take 0.3mL of silver amine complex solution and 0.5mL of ZrO 2 Add (100mg / mL) into 5mL NMP, stir and mix well; then add 0.5mL acetaldehyde solution (8M) and place it in a water bath at 45°C for reaction; take out the sample after reacting for 1h, and centrifuge at 10000rmp / min for 20min to remove the solid Redispersed into NMP to get Ag / ZrO 2 Nanocomposite Dispersion B.

[0059] (3) Th...

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Abstract

The invention discloses a photocatalyst capable of responding to visible light and near-infrared light and a preparation method thereof. The method comprises the following steps: depositing generated silver atoms on a nano-oxide surface in a controlled manner through dodecylamine improved silver mirror reaction to obtain a silver-cluster nano-oxide compound, and then loading the silver-cluster nano-oxide compound on a surface of a two-dimensional black phosphorus nano-sheet to obtain a ternary composite photocatalyst. In the ternary composite photocatalyst, through the response of the black phosphorus nano-sheet to the visible light and the near-infrared light, generated electrons is excited to activate the silver-cluster nano-oxide compound loaded on the surface of the black phosphorus nano-sheet, so as to enable the silver-cluster nano-oxide to exhibit excellent photocatalytic activity in visible light and near-infrared light regions. Furthermore, the photocatalytic performance of the ternary composite photocatalyst can be regulated and controlled by changing the relative content of the silver-cluster nano-oxide loaded on the surface of the black phosphorus nano-sheet.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to a photocatalyst capable of responding to visible light and near-infrared light and a preparation method thereof. Background technique [0002] At present, as a green, clean and inexhaustible energy source, solar energy is considered to be one of the most promising and applicable renewable energy sources in the 21st century. How to fully and efficiently use solar energy for environmental governance and new energy applications is currently the most concerned topic for many scientific and technological workers. Among them, the use of solar energy for photocatalytic degradation of industrial wastewater and toxic dyes is a very valuable way. Nowadays, a variety of photocatalysts have been continuously reported and achieved good results. Among many photocatalysts, titanium dioxide (TiO 2 ) As a classic photocatalyst, because its broadband just meets the electronic energy of ultraviolet l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/14B82Y30/00
CPCB82Y30/00B01J27/14B01J35/39
Inventor 屈军乐王鑫
Owner SHENZHEN UNIV
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