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Method using carbon nitrogen doped zinc-titanium nano particles to treat aromatic amine pharmaceutical wastewater

A bimetallic nanometer, carbon-nitrogen doping technology, applied in chemical instruments and methods, light water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult recycling, low quantum effect photocatalytic activity, secondary To avoid secondary pollution and other problems, achieve the effects of wide application range, improved catalytic efficiency, and excellent photocatalytic performance

Active Publication Date: 2018-10-16
广东安纳检测技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ti0 2 The low quantum effect and photocatalytic activity of photocatalysis, as well as the use of light are mostly concentrated in the ultraviolet region; and the powder catalyst is not easy to recycle when it is applied, and it is easy to cause secondary pollution, etc. These are the main problems restricting its development.
[0007] There is no literature report on the treatment method of 2,5-bis(trifluoromethyl)aniline in dutasteride wastewater, so it is necessary to find a method that can effectively degrade 2,5-bis(trifluoromethyl)aniline in dutasteride wastewater. The cleaning process has practical significance

Method used

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  • Method using carbon nitrogen doped zinc-titanium nano particles to treat aromatic amine pharmaceutical wastewater
  • Method using carbon nitrogen doped zinc-titanium nano particles to treat aromatic amine pharmaceutical wastewater
  • Method using carbon nitrogen doped zinc-titanium nano particles to treat aromatic amine pharmaceutical wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Carbon and nitrogen doped zinc-titanium bimetallic nanoparticles were prepared as follows:

[0028] 1) ZnO@g-C 3 N 4Preparation: Put 6.5g of zinc powder in 50ml of 1mol / L aqueous sodium hydroxide solution, then dropwise add 30ml of 30%wt hydrogen peroxide solution, and place it in a tetrafluoroethylene-lined stainless steel hydrothermal reaction kettle at 60-70°C React at low temperature for 18-20h, then add 200ml of melamine methanol solution with a concentration of 2mol / L, react at 100-120°C for 6-8h, and finally place it in a closed crucible and calcinate at 550-600°C under nitrogen atmosphere. After 6 hours of calcination, the temperature was lowered to room temperature, washed with absolute ethanol and dried at 60°C to obtain graphite-phase carbon nitride nanoparticles supported by zinc oxide (abbreviated as ZnO@g-C 3 N 4 );

[0029] 2) Titanium oxide loading process: 10 mmol of tetraisopropyl titanate was dissolved in 100 ml of isopropanol, and 20 g of graphit...

Embodiment 2

[0032] Cat-X obtained at different calcination temperatures in Example 1 was used as a photocatalyst to photodegrade 2,5-bis(trifluoromethyl)aniline. The process is as follows:

[0033] Add 500ml of 2,5-bis(trifluoromethyl)aniline aqueous solution (self-made, using 2,5-bis(trifluoromethyl) ) aniline standard substance and water are prepared into an aqueous solution with a concentration of 10mg / L, and the pH is adjusted to 7.0 to get final product), and Cat / X and nano-TiO prepared at different calcination temperatures prepared in Example 1 are added respectively 2 and 20 mg of nano-ZnO particles each, using a 300W Microsolar300 xenon lamp (Beijing Pofilai Technology Co., Ltd.) light source to simulate visible light at 30 ° C, and continuously aerate while irradiating. HPLC samples every 1h for 2,5- The concentration of bis(trifluoromethyl)aniline is detected, and when the concentration of the two samples before and after does not change, the irradiation is stopped, and the phot...

Embodiment 3

[0039] Cat / 650 was used as photodegradation catalyst to investigate the degradation rate under different pH environments, the dosage of Cat / 650 and the initial concentration of 2,5-bis(trifluoromethyl)aniline aqueous solution. The test scheme is as follows:

[0040] Add 500ml of 2,5-bis(trifluoromethyl)aniline aqueous solution (self-made, using 2,5-bis(trifluoromethyl) ) aniline standard substance and water are mixed with the aqueous solution of different concentration, adopt hydrochloric acid or sodium hydroxide to adjust pH to different pH), add the Cat / 650 that the embodiment 1 preparation of different weights respectively, the Microsolar300 xenon lamp of the 300W that adopts (Beijing Pofei Lai Technology Co., Ltd.) light source simulates visible light at 40-45°C, and continuously aerates while irradiating. HPLC samples every 1h to detect the concentration of 2,5-bis(trifluoromethyl)aniline. When the two sampling concentrations no longer change, the irradiation is stopped, ...

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Abstract

The invention belongs to the technical field of water pollution control and particularly relates to a method using carbon nitrogen doped zinc-titanium nano particles to treat aromatic amine pharmaceutical wastewater. Melamine serving as the carbon source and the nitrogen source is subjected to high-temperature calcination to form graphite-phase carbon nitride, the carbon nitride is loaded with nano zinc oxide to form zinc oxide loaded graphite-phase carbon nitride nano particles (ZnO@g-C3N4), and using a sol-gel method to prepare the carbon nitrogen doped zinc-titanium nano particles with optical catalytic performance. The prepared carbon nitrogen doped zinc-titanium nano particles can well degrade 2,5-bis(trifluoromethyl)aniline under a weak acid condition, can be used for degrading otheraromatic amine wastewater and is promising in industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of water pollution prevention and control, and in particular relates to a method for treating aromatic amine pharmaceutical wastewater with carbon and nitrogen-doped zinc-titanium bimetallic nanoparticles. Background technique [0002] Dutasteride, the chemical name is (5α,17β)-N-[2,5-bis(trifluoromethyl)phenyl]-3-oxo-4-azaandrost-1-ene-17- Formamide is a dual 5α-reductase inhibitor developed by Glaxo Smith Kline Company in the United Kingdom. It was approved by the US FDA in June 2003, and its trade name is Avodart. It is used for the prevention and treatment of benign prostatic hyperplasia. On March 6, 2014, the CFDA approved the sale of the drug in the Chinese market. [0003] The aniline derivative 2,5-bis(trifluoromethyl)aniline is used as a key intermediate in the production of dutasteride, and the molar ratio of this intermediate used in the reaction is much higher than that of another structural fra...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01J37/03B01J37/08C02F1/32C02F1/30C02F101/38
CPCC02F1/30C02F1/32B01J27/24B01J37/036B01J37/038B01J37/082C02F2101/38B01J35/39
Inventor 刘述珍王佳冯博闫园高建成
Owner 广东安纳检测技术有限公司
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