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Carbon-doped nano-titanium dioxide adsorbing material for reducing harmful components of cigarettes

A nano-titanium dioxide, adsorption material technology, applied in the direction of tobacco, application, smoke oil filter, etc., to achieve the effect of high coke reduction and harm reduction, good adsorption and high safety

Inactive Publication Date: 2015-11-11
HUBEI CHINA TOBACCO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, titanium dioxide has unique surface properties, and its adsorption and selective adsorption capabilities are superior to most other metal oxides; at the same time, titanium dioxide also has good disinfection and sterilization effects, so doping nano-titanium dioxide into carbon materials can effectively improve The harm reduction efficiency of cigarette smoke, however, has not yet been reported in the literature

Method used

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  • Carbon-doped nano-titanium dioxide adsorbing material for reducing harmful components of cigarettes
  • Carbon-doped nano-titanium dioxide adsorbing material for reducing harmful components of cigarettes
  • Carbon-doped nano-titanium dioxide adsorbing material for reducing harmful components of cigarettes

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preparation example Construction

[0026] The carbon-doped nano-titanium dioxide adsorption material designed in the present invention for cigarette harm reduction is characterized in that: the carbon-doped nano-titanium dioxide adsorption material is prepared by the following method, and the steps include:

[0027] (1) Preparation of nano-carbon sol by electrochemical method: the solid carbon material is used as the positive electrode, and the material whose electrode potential is inert greater than or equal to carbon is used as the negative electrode, and an AC pulse current is passed into the electrode containing the electrolyte for reaction. After several times of stirring, the nano carbon sol can be obtained.

[0028] (2) Dilute tetrabutyl titanate with ethanol, add iminodiacetic acid dropwise, adjust and control the pH value of the solution, and stir the resulting mixture;

[0029] (3) Add the carbon sol solution diluted with ethanol dropwise to the mixture in the step (2), stir, and rinse the resulting n...

Embodiment 1

[0042]Preparation of nano-carbon sol by electrochemical method: use carbon rods as positive electrodes, use inert materials as negative electrodes, arrange the electrodes according to the positive and negative electrodes, and put them into an electrolytic solution prepared by sulfuric acid, hydrochloric acid, nitric acid, sodium chloride and water. In the liquid reaction tank, each group of electrodes is connected in parallel, and the positive and negative electrodes are separated by an insulating tape mesh. Then, a high-frequency AC pulse current is passed into the electrodes, and the temperature is controlled at 58 ° C. The frequency of the current is controlled at 20KHZ, the voltage is controlled at 5V, and the current density is controlled at 50mA / cm 2 Under the conditions of the reaction, stir once every 5 hours, finish the reaction after 5 days, and the solution in the tank is nano carbon sol;

[0043] The volume ratio of tetrabutyl titanate, ethanol and iminodiacetic ac...

Embodiment 2

[0051] Same as Example 1, the difference is;

[0052] The volume ratio of tetrabutyl titanate, ethanol and iminodiacetic acid is 15:52:3.

[0053] As shown in Table 2, compared with the effect of the composite mouthpiece on flue gas interception of the original acetate fiber control mouthpiece, tar, carbon monoxide, phenol, ammonia, hydrocyanic acid, and benzo[a]pyrene were all reduced to varying degrees, and tar, The reduction rates of carbon monoxide and phenol are above 20%.

[0054] Table 2: The trapping effect of composite mouthpieces and ortho acetate fiber control mouthpieces on smoke

[0055]

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Abstract

A carbon-doped nano-titanium dioxide adsorbing material for reducing harmful components of cigarettes, designed by the invention, is prepared through the following steps: (1) preparing nano-carbon sol; (2) diluting tetrabutyl titanate with ethyl alcohol, dropwise adding iminodiacetic acid, adjusting and controlling the pH value of the solution, and stirring the obtained mixture; (3) dropwise adding the carbon sol solution diluted with ethyl alcohol into the mixture in the step (2), stirring, flushing the obtained new mixture with ethyl alcohol and water, and after removing the sediment, placing in a vacuum drying oven for drying, so as to obtain carbon-doped titanium dioxide gel; (4) heating the carbon-doped titanium dioxide gel for calcination to obtain the carbon-doped nano-titanium dioxide adsorbing material. The adsorbing material can be used for reducing harmful components of cigarette smoke, has a relatively high adsorption capacity, can effectively reduce harmful substances like carbon monoxide, ammonia and phenol in cigarette smoke, and is simple in the preparation process, less in material utilization amount and low in cost.

Description

technical field [0001] The invention relates to the technical field of reducing tar and harm of cigarettes, in particular to a carbon-doped nano-titanium dioxide adsorption material for reducing harm of cigarettes. Background technique [0002] Cigarette burning and smoking is a process of incomplete combustion with high temperature and oxygen deficiency. The instantaneous maximum temperature can reach 1000°C, and the temperature of most parts exceeds 500°C. Combustion at a higher temperature leads to simultaneous reactions such as distillation, dry distillation, pyrolysis, and synthesis, forming thousands of nascent compounds. Cigarette smoke is a complex multiphase aerosol in which gas, liquid, and solid coexist. Among these chemical components, there are not only substances that provide tobacco aroma, flavor and physiological effects, but also substances that produce miscellaneous gas, irritation and bad flavor, and trace amounts of substances that are harmful to human h...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30A24D3/16
Inventor 李冉宋旭艳罗诚浩刘华臣陈义坤
Owner HUBEI CHINA TOBACCO IND
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