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A kind of inorganic semiconductor/conjugated polymer janus microsphere and preparation method thereof

A technology of conjugated polymers and inorganic semiconductors, applied in the field of materials, can solve problems such as low preparation efficiency, high cost, and strict process requirements, and achieve the effects of easy control of conditions, high yield, and simple synthesis steps

Active Publication Date: 2021-09-24
中科广化(重庆)新材料研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Inorganic semiconductor / metal Janus microspheres are usually prepared by two-dimensional metal magnetron sputtering, which is prepared by attaching the microspheres on a plane and depositing them on the exposed side. The single preparation amount is at the microgram level. High cost, strict process requirements, and low preparation efficiency

Method used

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  • A kind of inorganic semiconductor/conjugated polymer janus microsphere and preparation method thereof
  • A kind of inorganic semiconductor/conjugated polymer janus microsphere and preparation method thereof
  • A kind of inorganic semiconductor/conjugated polymer janus microsphere and preparation method thereof

Examples

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Embodiment 1

[0031] The present embodiment provides the preparation method of titanium dioxide / polypyrrole Janus microspheres, comprising the following steps:

[0032] 1) Take 0.4g of monodisperse TiO with a particle size of about 1 μm 2 Add microspheres, 10mL deionized water, and 2g section paraffin (melting point about 52-54°C) into a centrifuge tube, and place in a 75°C water bath until the paraffin melts. Use a high-speed shearing machine (miccraD-9) to emulsify initially at 10,000 rpm for 10 minutes, and then raise it to 16,500 rpm for 5 minutes. After standing at 75°C for 5 minutes, quickly put it into ice water to cool.

[0033] 2) Pour the result of 1) into a flask, add 10mL of deionized water, drop in 5mL of hydrochloric acid, stir for 30min, pass N2 to remove O2, quickly add 2.7μL of pyrrole, close the system, stir at 20°C, and irradiate with a high-pressure mercury lamp 5h (175W high-pressure mercury lamp, cooled by condensed water, the mercury lamp is about 20cm away from the...

Embodiment 2

[0038] This embodiment provides a preparation method of titanium dioxide / polythiophene Janus microspheres, comprising the following steps:

[0039] 1) Take 0.4g of monodisperse TiO with a particle size of about 1 μm 2 Add microspheres, 10mL deionized water, and 2g section paraffin (melting point about 52-54°C) into a centrifuge tube, and place in a 75°C water bath until the paraffin melts. Use a high-speed shearing machine (miccra D-9) to emulsify initially at 10,000 rpm for 10 minutes, and then raise it to 16,500 rpm for 5 minutes. After standing at 75°C for 5 minutes, quickly put it into ice water to cool.

[0040] 2) Pour the result of 1) into a flask, add 10mL of deionized water, drop in 5mL of hydrochloric acid, stir for 30min, pass N2 to remove O2, quickly add 3.4μL of thiophene, close the system, stir in an ice bath at 5°C, and use a high-pressure mercury lamp Irradiate for 10 hours (175W high-pressure mercury lamp, cooled by condensed water, the distance between the ...

Embodiment 3

[0043] This example provides the characterization method and effect of the microspheres obtained in Example 1 as Janus micro-nano motors.

[0044] Take 1 mg of microspheres in 1 mL of 0.2% H 2 o 2 In the aqueous solution, ultrasonically disperse for 5 minutes, take 1 μL and drop it on a single concave glass slide, under the microscope (Phoenix-XZJ2030B) placed in the dark box, observe and record through the electronic screen (use the C port of the microscope to connect an external 2.5X Sony adapter ring, connect Sony α6400 shoots 100 frames of video), uses a light source under the microscope, and uses an ultraviolet lamp (8W UV-A) to illuminate at a distance of 5cm to characterize the movement of microspheres under the ultraviolet lamp (light intensity is about 2mW / cm 2 ).

[0045] The movement of the microspheres in the video is analyzed by Tracker software, and multiple microspheres are collected for statistics on the movement path data. Compared with pure Brownian motion...

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Abstract

The invention discloses a preparation method of inorganic semiconductor / conjugated polymer Janus microspheres, which comprises the following steps: (1) dispersing the particles of photocatalytic semiconductor materials with nanometer or micrometer size in water, adding solid paraffin, heating and melting Carry out emulsification; (2) step (1) gain is cooled to paraffin solidification, adds solvent, doping agent wherein, stirs to remove O 2 , and then quickly add polymerized monomers, close the system, and stir the reaction under the irradiation of ultraviolet light source. After the reaction, remove the paraffin to obtain Janus microspheres. The yield of this method is high, and the conventional two-dimensional Janus microsphere preparation method can only prepare the amount of microgram level in a single time. Under the same conditions, this method can be increased to tens of grams in a single time. In the preparation method, the single preparation amount can be increased by 5-6 orders of magnitude. The obtained Janus microspheres have great prospects in photocatalytic degradation of pollutants and micro-nano motors.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an inorganic semiconductor / conjugated polymer Janus micro-nano material and a preparation method thereof. Background technique [0002] Janus is a noun in ancient Roman mythology, meaning "two-faced god". In 1991, French scientist deGennes used the word Janus to describe particles with dual properties for the first time in his Nobel acceptance speech. Then people showed great interest in this unique structural feature. Due to their structural specificity, many Janus materials can often exhibit two different properties, so compared with traditional isotropic materials, they have more abundant applications, such as emulsifiers, catalysts, functional carrier materials, sensors, micro-nano motor etc. [0003] In the past ten years, the field of micro-nano motors has developed rapidly. Micro-nanomotor refers to a microscopic device with motion performance on the micr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/18B01J13/06
CPCB01J13/06B01J13/18
Inventor 靳焘贺子健赖华杰刘博刘瑞陈晓丹李铮陈玉放
Owner 中科广化(重庆)新材料研究院有限公司