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Method for loading titania microflowers on shaped carbon material

A technology of titanium dioxide and carbon materials, applied to the surface loading of carbon materials, in the field of loading titanium dioxide micron flowers on the surface of formed carbon materials, it can solve the problems of hydrothermal reaction liquid adsorption residue, uneven titanium dioxide film, difficult to control thickness, etc., to reduce solid The effect of liquid interfacial tension, easy recycling and controllable thickness

Inactive Publication Date: 2018-01-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this method is directly applied to shaped carbon materials, the following problems will occur: First, the surface of the unpretreated shaped carbon material exhibits certain hydrophobic properties, which makes it difficult for titanium dioxide to grow on the surface of the shaped carbon material, which eventually leads to the Titanium dioxide films have problems such as unevenness, easy peeling, difficult to control thickness, and irregular shape; secondly, the surface and interior of formed carbon materials are usually rich in micropores, combined with certain hydrophobic characteristics, it is easy to adsorb in the hydrothermal process The generated gas is stored in the micropores, and the gas is released when the hydrothermal kettle is opened, destroying the prepared titanium dioxide film; finally, the microporous structure of the formed carbon material is also easy to cause the adsorption residue of the hydrothermal reaction liquid

Method used

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  • Method for loading titania microflowers on shaped carbon material
  • Method for loading titania microflowers on shaped carbon material
  • Method for loading titania microflowers on shaped carbon material

Examples

Experimental program
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Effect test

specific Embodiment 1

[0032] Preparation of titanium dioxide micro-flower electrode supported on graphite plate:

[0033] The high-temperature pyrolytic graphite plate was polished to smooth with P400 sandpaper, P1500 sandpaper and 0.05 μm aluminum powder in sequence, and then ultrasonicated in acetone, ethanol, and deionized water for 10 minutes, and dried for later use. Slowly pour 20mL of deionized water into 10mL of ethanol and stir for 5min; slowly pour the mixed solution of ethanol and water into 30mL of concentrated hydrochloric acid and stir for 5min; add 1mL of tetrabutyl titanate dropwise into ethanol, water and concentrated hydrochloric acid Mix the solution while vigorously stirring until the solution is clear to obtain a hydrothermal reaction solution. Lean the cleaned graphite plate against the wall of a 100mL hydrothermal kettle at 45°, pour 60mL of the prepared hydrothermal reaction solution to immerse the graphite plate, and ultrasonicate for 20min. Seal the hydrothermal kettle, k...

specific Embodiment 2

[0035] Preparation of ink plate-supported titanium dioxide micro-flower electrodes using hydrothermal reaction solutions configured with different ethanol ratios:

[0036] The high-temperature pyrolytic graphite plate was polished to smooth with P400 sandpaper, P1500 sandpaper and 0.05 μm aluminum powder in sequence, and then ultrasonicated in acetone, ethanol, and deionized water for 10 minutes, and dried for later use. Slowly add 5, 10, 15, 20, 30 mL of ethanol into 25, 20, 15, 10, 0 mL of deionized water, respectively, and stir for 5 min to obtain mixed solutions (or monomers) of ethanol and water in different proportions. Slowly pour the mixed solution (or monomer) of ethanol and water into 30mL of concentrated hydrochloric acid and stir for 5min; add 1mL of tetrabutyl titanate dropwise into the mixed solution while vigorously stirring until the solution is clear to obtain a hydrothermal reaction solution . Lean the cleaned graphite plate against the wall of a 100mL hydro...

specific Embodiment 3

[0038] The preparation method of the titanium dioxide nanoflower-coated carbon material of this embodiment is the same as that of the specific example 1, and the specific parameters are: the graphite rod is used as the base material, and after being ultrasonicated in acetone, ethanol, and deionized water for 10 minutes, place it at an angle of 30° In a 100mL hydrothermal kettle, pour a mixed solution of 30mL concentrated hydrochloric acid, 10mL deionized water, 20mL ethanol and 2mL tetrabutyl titanate to immerse the graphite rod, ultrasonicate for 20min, seal the hydrothermal kettle, and keep it warm at 140°C for 2h , cooled to room temperature, took out the sample, rinsed it four times with deionized water, soaked it in deionized water at room temperature for 20 minutes, and then dried it at 120°C for 2 hours in the dark, and kept the dried sample at 550°C for 0.5 h, cooling down to room temperature, the titanium dioxide micron flower-coated graphite rod is obtained.

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Abstract

The invention relates to a carbon material surface loading technology and aims to provide a method of loading titania microflowers on a shaped carbon material. The method comprises the following steps: placing the washed shaped carbon material obliquely and immersing in a hydrothermal reaction liquid and then sonicating for 5-20min; sealing the hydrothermal autoclave and keeping the reaction at 140-180 DEG C for 2-5h; cooling to the room temperature, taking out the carbon material; washing with deionized water for 4 to 8 times, immersing in deionized water for 20min at the room temperature, and then drying for 2h at 120 DEG C and dark conditions; performing heat preservation on the dried carbon material at 450 to 550 DEG C for 0. 5 to 2h, cooling to the room temperature and obtaining the titania microflowers coated carbon material. The titania microflowers prepared by the invention has the advantages that the distribution is dense and uniform, the morphology is complete, under xenon lamp irradiation, a significant photoelectric response exists; the thickness of the titania film can be adjusted by controlling the ratio of ethanol and deionized water in the hydrothermal reaction liquid; hydrothermal method is simple, the cost is low, the energy consumption is low, the film formation is stable and the method is suitable for mass production.

Description

technical field [0001] The invention relates to a carbon material surface loading technology, in particular to a method for loading titanium dioxide micron flowers on the surface of a shaped carbon material. The material can be used in rechargeable batteries, photocatalysis, electrocatalysis, microbial fuel cells, solar cells, supercapacitors, etc., and belongs to the fields of composite material preparation, new energy and sewage treatment. Background technique [0002] Energy crisis and environmental pollution are two major problems to be solved in modern society. It is necessary to develop clean and renewable energy and repair the damaged environment through the development of new energy and environmental materials. Titanium dioxide has always been a hot spot in the field of energy and environmental materials. It can be applied to many fields such as photocatalysis, electrocatalysis, microbial fuel cells, rechargeable batteries, solar cells, and supercapacitors. [0003]...

Claims

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Application Information

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IPC IPC(8): C04B41/87D06M11/46D21H19/38B01J21/06H01G11/32H01G11/46H01G11/86H01M4/90H01L31/0224C01G23/053B82Y40/00D06M101/40
CPCY02E60/50
Inventor 成少安李超超
Owner ZHEJIANG UNIV
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