Preparation method of manganese dioxide/graphite oxide-based self-driven micromotor

A nano-manganese dioxide and catalyst technology, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc. High, expensive catalytic materials and other issues, to achieve the effect of uniform size, good repeatability, and process stability

Active Publication Date: 2018-10-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to realize the self-driving of the micro-nano motor under the action of asymmetric force, the preparation of the spherical micro-nano motor is mainly to prepare the Janus spherical micro-nano motor. The preparation of spherical micro-nano motors is challenging and requires high equipment, and the catalytic materials are expensive (mostly platinum or silver are used as catalytic materials), the operation is complicated, and it is difficult to achieve large-scale mass production

Method used

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  • Preparation method of manganese dioxide/graphite oxide-based self-driven micromotor
  • Preparation method of manganese dioxide/graphite oxide-based self-driven micromotor

Examples

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Effect test

Embodiment 1

[0028] (1) Preparation of nano manganese dioxide particles

[0029] Weigh 1.94 g of potassium permanganate and 0.845 g of manganese sulfate, dissolve them in a small amount of deionized water, mix them evenly in a high-temperature reactor, heat at 160 °C for 12 hours, and centrifuge the obtained product after cooling , and repeatedly washed with deionized water, dried, and set aside;

[0030] (2) Preparation of precursor solution

[0031] Preparation of the internal phase fluid: The graphene oxide dispersion was prepared by the improved Hummers method, and 7 mL of the graphene oxide aqueous dispersion with a concentration of 10 mg / mL was ultrasonically treated with a 300 W ultrasonic cleaner for 30 min; 3 mL of chitosan-acetic acid solution, wherein the concentration of chitosan is 8 mg / mL, and the mass percent concentration of acetic acid is 2.5%, is added to the above-mentioned graphene oxide solution, and ultrasonic cleaning with a power of 300 W is performed for 30 min to...

Embodiment 2

[0042] (1) Preparation of nano manganese dioxide particles

[0043]Weigh 1.94 g of potassium permanganate and 0.845 g of manganese sulfate, dissolve them in a small amount of deionized water, mix them evenly in a high-temperature reactor, heat at 160 °C for 12 hours, and centrifuge the obtained product after cooling , and repeatedly washed with deionized water, dried, and set aside;

[0044] (2) Preparation of precursor solution

[0045] Preparation of the internal phase fluid: The graphene oxide dispersion was prepared by the improved Hummers method, and 7 mL of the graphene oxide aqueous dispersion with a concentration of 5 mg / mL was ultrasonically treated with a 300 W ultrasonic cleaner for 30 min; 3 mL of chitosan-acetic acid solution, wherein the concentration of chitosan is 8 mg / mL, and the mass percent concentration of acetic acid is 2.5%, is added to the above-mentioned graphene oxide solution, and ultrasonic cleaning with a power of 300 W is performed for 30 min to o...

Embodiment 3

[0055] (1) Preparation of nano manganese dioxide particles

[0056] Weigh 1.94 g of potassium permanganate and 0.845 g of manganese sulfate, dissolve them in a small amount of deionized water, mix them evenly in a high-temperature reactor, heat at 160 °C for 12 hours, and centrifuge the obtained product after cooling , and repeatedly washed with deionized water, dried, and set aside;

[0057] (2) Preparation of precursor solution

[0058] Preparation of the internal phase fluid: The graphene oxide dispersion was prepared by the improved Hummers method, and 7 mL of the graphene oxide aqueous dispersion with a concentration of 20 mg / mL was ultrasonically treated with a 300 W ultrasonic cleaner for 30 min; 3 mL of chitosan-acetic acid solution, wherein the concentration of chitosan is 2 mg / mL, and the mass percent concentration of acetic acid is 2.5%, is added to the above-mentioned graphene oxide solution, and ultrasonic cleaning with a power of 300 W is performed for 30 min to...

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Abstract

The invention belongs to the field of inorganic functional materials, and particularly relates to a preparation method of a manganese dioxide/graphite oxide-based self-driven micromotor. The preparation method comprises the following steps: firstly, preparing a dispersion having a certain concentration and containing sodium lauryl sulfate, nanometer manganese dioxide, graphene oxide and chitosan as an internal phase fluid, using an organic solvent containing a surfactant as an external phase fluid, controlling a certain flow rate to enable the internal phase fluid and the external phase fluidto run through a constructed microfluidic device, forming a monodisperse water/oil emulsion in a collecting pipe, and then collecting and freezing into ice balls by collecting liquid placed in liquidnitrogen, filtering the produced ice balls, and performing freeze drying to obtain the self-driven micromotor. The micromotor can effectively remove pollutants from water through adsorption, and has agood application prospect in the field of environmental protection.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, in particular to a method for preparing a manganese dioxide / graphene oxide-based self-driven micro-motor. Background technique [0002] At present, micro-nano motors have shown good application prospects in the field of sewage treatment. Since the micro-nano motor has an autonomous micro-cleaning system, without external energy input, the micro-nano motor can work efficiently and actively to effectively remove pollutants in water. Since the development of micro-nano motors, many major breakthroughs have been made, and people have prepared micro-nano motors of various shapes. In order to realize the self-driving of the micro-nano motor under the action of asymmetric force, the preparation of the spherical micro-nano motor is mainly to prepare the Janus spherical micro-nano motor. The preparation of spherical micro-nano motors is challenging, requiring high equipment, and the catalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J23/32C02F1/28C02F1/72B01J20/30C02F101/30
CPCB01J20/06B01J20/20B01J20/24B01J23/32C02F1/281C02F1/286C02F1/722C02F1/725C02F2101/308C02F2305/026
Inventor 国伟林任梦张梦杰王瑞芹周海红
Owner UNIV OF JINAN
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