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Preparation and application of titanium dioxide/activated carbon self-assembled composite

A composite material, titanium dioxide technology

Inactive Publication Date: 2017-02-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the concentration of pollutants in non-industrial environments is very low, which reduces the effective contact probability between titanium dioxide and pollutants, resulting in a decrease in photocatalytic efficiency.

Method used

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  • Preparation and application of titanium dioxide/activated carbon self-assembled composite
  • Preparation and application of titanium dioxide/activated carbon self-assembled composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1, using blue charcoal powder as raw material, prepare blue charcoal powder-based activated carbon by steam activation method.

[0033] Weigh 10-20g of dry blue charcoal powder, put it into the quartz tube furnace, first pass nitrogen into the system to drive out the air, start heating after 10-15 minutes, and heat up at a speed of 10°C / min-15°C / min To the activation temperature of 700 ~ 800 ℃. After activation for 30-90 minutes, stop heating. Cool to room temperature under nitrogen protection. Take out the activated carbon from the furnace and dry it at 100-120°C for 6-8 hours before use.

[0034] Step 2: Add 3-10 mL of tetrabutyl titanate into the ethanol solution, and then stir for 0.5-1 h at a stirring rate of 300-450 r / min to obtain a mixed solution.

[0035] Step 3: Add 0.75-1.0 mL of glacial acetic acid to the above solution, adjust the pH of the solution to 4-6 with concentrated nitric acid, then stir for 1-2 hours at a stirring rate of 400-500 r / min, an...

Embodiment 2

[0044] Step 1, using blue charcoal powder as raw material, prepare blue charcoal powder-based activated carbon by steam activation method.

[0045] Weigh 10g of dry blue charcoal powder, put it into a quartz tube furnace, firstly pass nitrogen into the system to drive out the air, start heating after 15 minutes, and raise the temperature to the activation temperature of 800°C at a rate of 10°C / min. After 30 minutes of activation, stop heating. Cool to room temperature under nitrogen protection. Take out the activated carbon from the furnace and dry it at 120°C for 8 hours for later use;

[0046] Step 2, adding 3.75 mL of tetrabutyl titanate into the ethanol solution, and then stirring for 0.5 h at a stirring rate of 450 r / min to obtain a mixed solution;

[0047] Step 3, add 0.40mL of glacial acetic acid to the above solution, adjust the pH of the solution to 5 with concentrated nitric acid, then stir for 2h at a stirring rate of 400r / min, add 3.0mL of methanol containing 1.0...

Embodiment 3

[0052] Step 1, using blue charcoal powder as raw material, prepare blue charcoal powder-based activated carbon by steam activation method.

[0053] Weigh 10g of dry blue charcoal powder, put it into a quartz tube furnace, firstly pass nitrogen into the system to drive out the air, start heating after 15 minutes, and raise the temperature to the activation temperature of 800°C at a rate of 10°C / min. After 30 minutes of activation, stop heating. Cool to room temperature under nitrogen protection. The activated carbon was taken out from the furnace and dried at 120°C for 8 h before use.

[0054] Step 2, adding 7.5 mL of tetrabutyl titanate into the ethanol solution, and then stirring for 0.5 h at a stirring rate of 450 r / min to obtain a mixed solution;

[0055] Step 3, add 0.75mL of glacial acetic acid to the above solution, adjust the pH of the solution to 5 with concentrated nitric acid, then stir for 2h at a stirring rate of 400r / min, add 5mL of methanol solution containing ...

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Abstract

The invention relates to preparation of a titanium dioxide / activated carbon self-assembled composite. With a self-assembling method, activated carbon and titanium dioxide with efficient photocatalytic activity are effectively combined, and the efficient catalytic activity of titanium dioxide and the adsorption performance of activated carbon are utilized; the high adsorption performance of an activated carbon material is kept, and the photocatalytic activity of the activated carbon material is remarkably improved while compared with that of titanium dioxide, and the prepared material can be applied to treatment of xanthate in nonferrous metal beneficiation wastewater and can be repeatedly used. A product has high purity, good adsorption performance and high photodegradation efficiency and contains anatase type nanoparticles. The cost of raw materials is low, the process is simple and equipment is simple; the removal effect of xanthate in the beneficiation wastewater is better, and the composite is a simple, efficient and environment-friendly material and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to the preparation and application of a titanium dioxide / activated carbon self-assembled composite material. Background technique [0002] With the improvement of the modernization of industrial technology, while enjoying the comfort and convenience brought by the rapid development of science and technology, human beings are also suffering from the disaster of deteriorating living environment caused by blindness and short-sightedness. The potential impact of environmental pollution seriously threatens the continued reproduction and survival of human beings. The mining industry is the foundation of the country's economic development and involves many fields of industrial and agricultural production. With the rapid development of the economy and the improvement of people's quality of life, the demand for mineral resources is increasing. Non-ferrous metal beneficiation wastewater ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J35/10C02F1/30C02F101/34
CPCC02F1/30B01J21/18C02F2305/10C02F2101/40B01J35/618B01J35/39
Inventor 汤洁莉田宇红马晶
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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