Method for preparing composite material of polypyrrole granules and titanium dioxide nanotube array

A technology of polypyrrole particles and titanium dioxide, which is applied in electrolytic organic production, electrolytic components, electrolytic process and other directions, can solve the problems of low utilization rate of solar energy absorption, high semiconductor carrier recombination rate, low quantum efficiency, etc. Photocatalytic performance, simple implementation method, and the effect of large electrochemical response signal

Inactive Publication Date: 2011-01-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 There are some defects in the practical application of semiconductor photocatalysts, such as wide band gap (Eg=3.2V), light absorption wavelength is mainly limited in the ultraviolet region, and the absorption and utilization rate of solar light energy is low; the recombination rate of semiconductor photocarriers is high , the quantum efficiency is low, so the need for TiO 2 Materials are modified to improve their utilization of sunlight

Method used

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  • Method for preparing composite material of polypyrrole granules and titanium dioxide nanotube array
  • Method for preparing composite material of polypyrrole granules and titanium dioxide nanotube array
  • Method for preparing composite material of polypyrrole granules and titanium dioxide nanotube array

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Experimental program
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Effect test

Embodiment 1

[0032] 1) The titanium dioxide nanotube array is synthesized by anodic oxidation method, and the anatase titanium dioxide nanotube array is obtained by roasting, which specifically includes the following steps:

[0033] (a) Select a titanium foil with a purity greater than or equal to 99.6%, remove the oxides on the surface by grinding with metallographic sandpaper, put it in hydrochloric acid (15-30% by mass), absolute ethanol, and distilled water in sequence, and ultrasonically Wash for 10 minutes to further remove surface oxides;

[0034] (b) Put the cleaned and dried titanium foil as the anode and the platinum as the cathode in 0.17M HF solution, react at room temperature for 1.5h at a voltage of 23V, then take it out and immediately clean it with distilled water to form Amorphous titania nanotube arrays.

[0035] (c) Calcining the amorphous titania nanotube array obtained in step (b) in a nitrogen atmosphere for 1 h at a calcination temperature of 400° C. to obtain an an...

Embodiment 2

[0038] (a) Select a titanium foil with a purity greater than or equal to 99.6%, remove the oxides on the surface by grinding with metallographic sandpaper, put it in hydrochloric acid (15-30% by mass), absolute ethanol, and distilled water in sequence, and ultrasonically Wash for 12 minutes to further remove surface oxides;

[0039] (b) The cleaned and dried titanium foil is used as an anode, and the platinum sheet is placed in a 0.17M HF solution as a cathode, and reacted at room temperature for 1 hour at a voltage of 25V, and then taken out and immediately cleaned with distilled water. Arrays of crystalline titania nanotubes.

[0040] (c) Calcining the amorphous titania nanotube array obtained in step (b) for 1.2 h in a nitrogen atmosphere at a calcination temperature of 450° C. to obtain an anatase titanium dioxide nanotube array.

[0041] 2) In the aqueous solution composed of sodium dodecylbenzenesulfonate and pyrrole monomer, the calcined titanium dioxide nanotube array...

Embodiment 3

[0043] (a) Select a titanium foil with a purity greater than or equal to 99.6%, remove the oxides on the surface by grinding with metallographic sandpaper, put it in hydrochloric acid (15-30% by mass), absolute ethanol, and distilled water in sequence, and ultrasonically Wash for 15 minutes to further remove surface oxides;

[0044] (b) Put the cleaned and dried titanium foil as the anode, and the platinum sheet as the cathode in 0.17M HF solution, react at room temperature for 1.5h at a voltage of 20V, then take it out and immediately clean it with distilled water, through this step to form Amorphous titania nanotube arrays.

[0045] (c) Calcining the amorphous titania nanotube array obtained in step (b) for 1.5 h in an air atmosphere at a calcination temperature of 450° C. to obtain an anatase titanium dioxide nanotube array.

[0046] 2) In the aqueous solution composed of sodium dodecylbenzenesulfonate and pyrrole monomer, the calcined titanium dioxide nanotube array is us...

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Abstract

The invention discloses a method for preparing a composite material of polypyrrole granules and a titanium dioxide nanotube array. The method comprises the following steps of: (1) synthesizing a titanium dioxide nanotube array and roasting to obtain an anatase type titanium dioxide nanotube array; and (2) electrochemically polymerizing the roasted titanium dioxide nanotube array as a working electrode and a platinum electrode as an auxiliary electrode for 15-120 min under the condition of controlling the voltage to be 0.8-1.0V in an aqueous solution consisting of sodium dodecyl benzene sulfonate and pyrrole monomers to obtain a finished product of the composite material of the polypyrrole granules and the titanium dioxide nanotube array. In the invention, the nano polypyrrole granules are loaded on the titanium dioxide nanotube array by utilizing a constant potential, an implementation method is simple and convenient with the characteristics of low cost and is easy for operation, and the prepared composite material has important application in many high-tech fields such as high-performance catalysts, solar batteries, photoelectrocatalysis, and the like.

Description

technical field [0001] The invention relates to the field of preparation of new materials, in particular to a method for preparing a composite material of polypyrrole particles and titanium dioxide nanotube arrays. Background technique [0002] Conductive polymers, such as polypyrrole, polythiophene, polyaniline, etc., have become a hot spot in material science research due to their special structure and excellent physical and chemical properties. Among them, polypyrrole has good conductivity and oxidation resistance due to its typical conjugated large π bond structure, as well as the advantages of easy synthesis and doping, making it a popular polymer material in electrode materials, sensors, etc. , solar cells, supercapacitors and other fields are widely used, and it is one of the most concerned research directions in the field of conductive polymer research. [0003] Polypyrrole nanostructures (nanoparticles, rods, tubes, fibers, etc.) can be obtained by microemulsion po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K7/00C08K3/22C08G73/06C25B3/00
Inventor 肖鹏贾袆超张云怀何辉超
Owner CHONGQING UNIV
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