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Titanium dioxide nanometer composite material, and preparation methods and use thereof

A nanocomposite material and titanium dioxide technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as loss, secondary pollution, reunion, etc., and achieve low cost and good adsorption effect , the effect of the simple method

Active Publication Date: 2015-07-08
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the purposes of the present invention is also to provide a nano-composite material of titanium dioxide prepared by the method of the present invention, which combines nano-TiO 2 Fixed to the surface of polymer materials, the polymer plays the role of fixing nanoparticles, preventing their aggregation and controlling their nucleation and growth, so as to obtain a special nano-microstructure, and at the same time, solve the problem of nano-TiO 2 Agglomeration, loss and resulting secondary pollution in the application process

Method used

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  • Titanium dioxide nanometer composite material, and preparation methods and use thereof
  • Titanium dioxide nanometer composite material, and preparation methods and use thereof
  • Titanium dioxide nanometer composite material, and preparation methods and use thereof

Examples

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Effect test

Embodiment 1

[0055] 1) Disperse commercially available cellulose fiber (CF) (1g) in water (150ml), then slowly add concentrated sulfuric acid (2ml) dropwise while stirring;

[0056] 2) Add titanyl sulfate (TiOSO) dropwise in the above fiber dispersion 4 ) (0.8ml), while continuing to stir;

[0057] 3) Heating in a water bath at 70°C for 4 hours while stirring;

[0058] 4) After the reaction is completed, cool down, then vacuum filter, rinse the fibrous filter cake with deionized water several times, and dry at 40°C to obtain TiO 2 / Cellulose fiber nanocomposites.

[0059] figure 1 The surface morphology of the composite material obtained for this example, TiO 2 Nanoparticles are uniformly dispersed on the surface of cellulose; figure 2 For the thermogravimetric analysis of composite material that this embodiment makes, the result shows that TiO 2 The content is 3.1wt%.

Embodiment 2

[0061] 1) Disperse commercially available cellulose fiber (1g) in water (200ml), then slowly add concentrated sulfuric acid (4ml) dropwise while stirring;

[0062] 2) Add TiOSO dropwise to the above fiber dispersion 4 (2.4ml), while continuing to stir;

[0063] 3) Heating in a water bath at 90°C for 3 hours while stirring;

[0064] 4) After the reaction is completed, cool down, then vacuum filter, rinse the fibrous filter cake with deionized water several times, and dry at 40°C to obtain TiO 2 / Cellulose fiber nanocomposites.

Embodiment 3

[0066] 1) Dissolve n-butyl titanate (15ml) in 15ml of isopropanol, then slowly add it dropwise into 150ml of water while stirring;

[0067] 2) Add 1ml of nitric acid to the above solution, and continue stirring at room temperature for 2 hours to obtain TiO 2 Sol;

[0068] 3) The cellulose fibers were placed in the above TiO 2 Sol impregnation-suction filtration, so that the surface of cellulose fibers is pre-coated with TiO 2 film;

[0069] 4) Take n-butyl titanate (1ml) and add it to 50ml of hydrochloric acid solution (25ml HCl+25ml water), stir for 10min, then pour it into a reaction kettle lined with polytetrafluoroethylene;

[0070] 5) Will be pre-coated with TiO 2 The cellulose fibers were immersed in the above precursor solution, and the reaction kettle was sealed and heated in a 70°C thermostat for 4 hours;

[0071] 6) After the reaction is completed, after the temperature of the incubator is cooled to room temperature, the reaction kettle is taken out, the reactio...

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Abstract

The invention relates to a titanium dioxide (TiO2) nanometer composite material used for adsorbing heavy metals, and preparation methods and a use thereof. The preparation methods comprise a hydrolysis method, a hydrothermal method and a self assembling method. The composite material is prepared through loading nanometer TiO2 to micrometer polymer fibers or particles, and the above polymer has nanometer particle immobilizing, nanometer particle aggregation preventing and nanometer particle nucleation growth controlling effects, so the problems of agglomeration and loss of nanometer particles in the application process and secondary pollution due to the agglomeration and loss are solved. The obtained composite material has strong adsorption ability to heavy metal ions in water, and can be used in purification and treatment of heavy metals in industrial and domestic wastewater. The preparation methods have the advantages of simplicity, easy operation, green, cheap and easily available raw materials, and low cost; and the material prepared in the invention can be easily engineered to form a blocky material in order to form devices which can be used, so the material has a wide application prospect.

Description

technical field [0001] The invention relates to a titanium dioxide nanocomposite material and its preparation method and application, in particular to a green special titanium dioxide nanocomposite material for absorbing heavy metals, its preparation method and application. Background technique [0002] With the rapid development of the economy, a large amount of industrial wastewater is discharged, heavy metal pollution accidents occur frequently, and clean water resources are becoming increasingly scarce, which seriously restricts the sustainable development of society. Lead, cadmium, and mercury are the most biotoxic elements among heavy metals. Because heavy metals can accumulate in organisms and pass through bioaccumulation and concentration in the food chain, they pose a serious threat to the ecological environment and human health. At present, the commonly used heavy metal wastewater treatment technologies mainly include chemical precipitation, ion exchange, membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 李艳香杨传芳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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