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Novel preparation method of titanium dioxide-cellulose composite material

A composite material, titanium dioxide technology, applied in the field of preparation of nano-composite materials, can solve the problems of large energy consumption, complex preparation process, and decrease in specific surface area, and achieve the effects of convenient recycling, strong catalytic performance, and convenient preparation

Inactive Publication Date: 2014-07-23
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current method of preparing TiO2 from cellulose as a template requires high temperature treatment to increase the crystallinity of titanium dioxide, but the sintering treatment leads to the degradation of cellulose and the aggregation of titanium dioxide nanoparticles, which leads to a decrease in its specific surface area and consumes a lot of energy.
Although the domestic patent CN 103121712A has applied for the preparation of ultra-long fibrous titanium dioxide using cellulose fiber as a template, its preparation process is relatively complicated and has no visible light photocatalytic function; patent CN 101745430 also applied for the preparation of cellulose as a template with photocatalytic activity cellulose composite materials, but the process is cumbersome, and it needs to be sintered at high temperature, which increases energy consumption, and the actual catalytic utilization is only titanium dioxide

Method used

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Experimental program
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Effect test

Embodiment 1

[0017] The preparation method of titanium dioxide-cellulose composite material in the present embodiment comprises the following steps:

[0018] (1) Drop 1ml of titanium tetrachloride into liquid nitrogen, then slowly add deionized water into it, wherein the mass ratio of deionized water to titanium tetrachloride is 50:1, and then stir it evenly with ultrasonic to prepare the precursor solution.

[0019] (2) Weigh 0.2 g of cellulose, add it to the precursor solution prepared in step (1) and mix it under stirring conditions, wherein the mass ratio of cellulose and titanium tetrachloride is controlled at 10:1, and then The mixed solution obtained after mixing was transferred to a three-necked flask, stirred and heated at 30° C. for 72 hours to obtain a heated reaction solution.

[0020] (3) The heated reaction solution obtained in step (2) was centrifugally cleaned, and then dried in an oven at 40° C. to obtain a titanium dioxide-cellulose composite material. The scanning elec...

Embodiment 2

[0023] The preparation method of titanium dioxide-cellulose composite material in the present embodiment comprises the following steps:

[0024] (1) Drop 1ml of titanium tetrachloride into liquid nitrogen, then slowly add deionized water into it, wherein the mass ratio of deionized water to titanium tetrachloride is 60:1, and then stir it evenly with ultrasonic to prepare the precursor solution.

[0025] (2) Weigh 0.2 g of cellulose, add it to the precursor solution prepared in step (1) and mix it under stirring conditions, wherein the mass ratio of cellulose and titanium tetrachloride is controlled at 40:1, and then After mixing, the resulting mixture was transferred to a three-necked flask, stirred and heated at 70° C. for 24 hours to obtain a heated reaction solution.

[0026] (3) The heated reaction solution obtained in step (2) was centrifugally cleaned, and then dried in an oven at 80° C. to obtain a titanium dioxide-cellulose composite material.

[0027] Take 0.15g of...

Embodiment 3

[0029] The preparation method of titanium dioxide-cellulose composite material in the present embodiment comprises the following steps:

[0030] (1) Drop 1.5ml of titanium tetrachloride into liquid nitrogen, then slowly add deionized water into it, wherein the mass ratio of deionized water to titanium tetrachloride is 70:1, and then ultrasonically stir evenly to obtain a precursor body solution.

[0031] (2) Weigh 0.2 g of cellulose, add it to the precursor solution prepared in step (1) and mix it under stirring conditions, wherein the mass ratio of cellulose and titanium tetrachloride is controlled to be 80:1, and then After mixing, the resulting mixture was transferred to a three-necked flask, stirred and heated at 80° C. for 12 hours to obtain a heated reaction solution.

[0032] (3) The heated reaction solution obtained in step (2) was centrifugally cleaned, and then dried in an oven at 80° C. to obtain a titanium dioxide-cellulose composite material.

[0033] Take 0.15g...

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Abstract

The invention discloses a novel preparation method of a titanium dioxide-cellulose composite material. The novel preparation method comprises the following steps: preparing mixed liquor of titanium tetrachloride and water at a low temperature; and then adding cellulose as a template to carry out heating treatment to obtain the composite material with titanium dioxide nano crystals loaded on the cellulose. The novel preparation method disclosed by the invention is simple in preparation condition, convenient to operate and easy in mass production; the titanium dioxide-cellulose composite material obtained by the novel preparation method has very strong catalytic ability under visible light, and can be used for performing quick catalytic degradation on organic substances such as rhodamine B and methylene blue.

Description

technical field [0001] The invention relates to the technical field of preparation of nanocomposite materials, in particular to a preparation method of titanium dioxide-cellulose visible light photocatalyst. Background technique [0002] With the progress of modern industry and the development of society, the problem of water pollution is becoming more and more serious, and has become a major environmental problem in the world, especially some refractory organic substances, which are extremely harmful to the human body. In order to protect the environment and achieve sustainable development, Using TiO 2 Using semiconductor photocatalysts to degrade organic molecules is an efficient and green way to treat the environment, and has great development prospects and application value. [0003] TiO 2 The band gap is large (about 3.2eV), and ultraviolet light is needed to excite it to generate electron-holes, and the ultraviolet light content in sunlight is very small, which great...

Claims

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Application Information

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IPC IPC(8): B01J31/38C02F1/30
Inventor 杨穆王戈彭超豪余巨峰吴滔汪书乐陈翔
Owner UNIV OF SCI & TECH BEIJING
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