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A method for preparing porous titanium dioxide by polymer-assisted deposition

A technology of porous titanium dioxide and assisted deposition, which is applied in the field of nanomaterials, can solve the problems of low crystallinity materials, collapse of pore structure, and no theoretical system has been formed, and achieve the effects of high specific surface area, simple process and convenient operation

Active Publication Date: 2016-06-29
苏州巨联环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still shortcomings in this method: (1) the detachment of the template often leads to the collapse of the pore structure; (2) the obtained samples are usually low crystallinity materials
However, the template-free self-assembly method is highly accidental, the formation mechanism is still unclear, and there is no theoretical system that can be based on it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 70ml of deionized water, 10g of titanium tetrachloride, 10g of ethylenediaminetetraacetic acid and 10g of carboxylated polyethyleneimine, adjust the pH to 7, mix well with high-speed stirring, and then perform ultrafiltration to remove the solution with a molecular weight less than 3000g / mol impurities to obtain a water-soluble coating solution. Add 2 g of sodium dodecyl sulfate, stir evenly, and anneal in air at 450° C. for 24 hours to obtain porous titanium dioxide.

Embodiment 2

[0015] Add 85ml of deionized water, 5g of titanium tetrachloride, 3g of ethylenediaminetetraacetic acid and 7g of acylated polyethyleneimine, adjust the pH to 7.8, stir and mix evenly at high speed, and then carry out ultrafiltration to remove the solution with a molecular weight less than 3000g / mol impurities to obtain a water-soluble coating solution. Add 4 g of sodium dodecylbenzene sulfonate, stir evenly, and anneal in air at 500° C. for 12 hours to obtain porous titanium dioxide.

Embodiment 3

[0017] Add 90ml of deionized water, 3g of titanium tetrachloride, 6g of ethylenediaminetetraacetic acid and 1g of sulfonated polyethyleneimine, adjust the pH to 7.5, mix well with high-speed stirring, and then perform ultrafiltration to remove the solution with a molecular weight less than 3000g / mol impurities to obtain a water-soluble coating solution. Add 3 g of benzalkonium bromide, stir evenly, place in air at 550° C. for 36 hours and anneal to obtain porous titanium dioxide.

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PUM

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Abstract

The invention relates to a method for preparing porous titanium dioxide by polymer-assisted deposition. The steps sequentially include preparation of a titanium precursor solution, adding a porogen, and heat treatment to form a nanometer titanium dioxide porous material. The invention adopts the water-soluble polymer polyethyleneimine and its derivatives as protective agents to assist deposition to prepare porous titanium dioxide, and has the advantages of simple process, low energy consumption and the like. The prepared porous titanium dioxide has a high specific surface area, a well-developed and ordered pore structure, an adjustable pore size within a certain range, and the surface is easy to modify.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a method for preparing porous titanium dioxide by polymer-assisted deposition. Background technique [0002] Nanomaterials are generally composed of 1-100nm particles, which are in the transition region between macroscopic substances and microscopic atoms and molecules, and are a typical mesoscopic system. When the size of small particles enters the nanometer level, it has small size effects, quantum effects, surface effects, and macroscopic quantum tunneling effects. Due to the ultrafine particle size, nanomaterials exhibit special properties different from traditional materials, which are very different from traditional materials in terms of mechanical properties, magnetism, light, electricity, and heat. Nano-TiO 2 In addition to the general characteristics of nanoparticles, it also has the characteristics of semiconductor materials. These characteristics determine its gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047B82Y30/00B82Y40/00
Inventor 邹贵付林泽兵周裕
Owner 苏州巨联环保有限公司